Knowledge

Trophic level

Source šŸ“

4303: 316: 908:. note that trophic levels peaked at 3.4 in 1970 in the northwest and west-central Atlantic, followed by a subsequent decline to 2.9 in 1994. They report a shift away from long-lived, piscivorous, high-trophic-level bottom fishes, such as cod and haddock, to short-lived, planktivorous, low-trophic-level invertebrates (e.g., shrimp) and small, pelagic fish (e.g., herring). This shift from high-trophic-level fishes to low-trophic-level invertebrates and fishes is a response to changes in the relative abundance of the preferred catch. They consider that this is part of the global fishery collapse, which finds an echo in the overfished Mediterranean Sea. 4999: 297: 278: 40: 335: 5025: 1240:
pairwise interactions (plant-herbivore plus herbivoreā€“predator, for example). Significant interactions can occur between the first trophic level (plant) and the third trophic level (a predator) in determining herbivore population growth, for example. Simple genetic changes may yield morphological variants in plants that then differ in their resistance to herbivores because of the effects of the plant architecture on enemies of the herbivore. Plants can also
5013: 376: 142: 428: 4631: 400:, so energy pyramids can also be viewed as biomass pyramids, picturing the amount of biomass that results at higher levels from biomass consumed at lower levels. However, when primary producers grow rapidly and are consumed rapidly, the biomass at any one moment may be low; for example, phytoplankton (producer) biomass can be low compared to the zooplankton (consumer) biomass in the same area of ocean. 673: 411:). For this reason, food chains rarely extend for more than 5 or 6 levels. At the lowest trophic level (the bottom of the food chain), plants convert about 1% of the sunlight they receive into chemical energy. It follows from this that the total energy originally present in the incident sunlight that is finally embodied in a tertiary consumer is about 0.001% 363:. Decomposers are often left off food webs, but if included, they mark the end of a food chain. Thus food chains start with primary producers and end with decay and decomposers. Since decomposers recycle nutrients, leaving them so they can be reused by primary producers, they are sometimes regarded as occupying their own trophic level. 1239:
One aspect of trophic levels is called tritrophic interaction. Ecologists often restrict their research to two trophic levels as a way of simplifying the analysis; however, this can be misleading if tritrophic interactions (such as plantā€“herbivoreā€“predator) are not easily understood by simply adding
923:
are only about 10%, it follows that the rate of biological production is much greater at lower trophic levels than it is at higher levels. Fisheries catch, at least, to begin with, will tend to increase as the trophic level declines. At this point the fisheries will target species lower in the food
391:
In general, each trophic level relates to the one below it by absorbing some of the energy it consumes, and in this way can be regarded as resting on, or supported by, the next lower trophic level. Food chains can be diagrammed to illustrate the amount of energy that moves from one feeding level to
366:
The trophic level of a species may vary if it has a choice of diet. Virtually all plants and phytoplankton are purely phototrophic and are at exactly level 1.0. Many worms are at around 2.1; insects 2.2; jellyfish 3.0; birds 3.6. A 2013 study estimates the average trophic level of human beings
443:
Food webs largely define ecosystems, and the trophic levels define the position of organisms within the webs. But these trophic levels are not always simple integers, because organisms often feed at more than one trophic level. For example, some carnivores also eat plants, and some plants are
1224:
The FiB index is stable (zero) over periods of time when changes in trophic levels are matched by appropriate changes in the catch in the opposite direction. The index increases if catches increase for any reason, e.g. higher fish biomass, or geographic expansion. Such decreases explain the
359:, there is more than one food chain for most organisms, since most organisms eat more than one kind of food or are eaten by more than one type of predator. A diagram that sets out the intricate network of intersecting and overlapping food chains for an ecosystem is called its 904:. However, more recent work finds no relation between economic value and trophic level; and that mean trophic levels in catches, surveys and stock assessments have not in fact declined, suggesting that fishing down the food web is not a global phenomenon. However Pauly 367:
at 2.21, similar to pigs or anchovies. This is only an average, and plainly both modern and ancient human eating habits are complex and vary greatly. For example, a traditional Inuit living on a diet consisting primarily of seals would have a trophic level of nearly 5.
664:. This is because there is a consistent increase in the nitrogen isotopic composition at each trophic level caused by fractionations that occur with the synthesis of biomolecules; the magnitude of this increase in nitrogen isotopic composition is approximately 3ā€“4ā€°. 640:
In the case of marine ecosystems, the trophic level of most fish and other marine consumers takes a value between 2.0 and 5.0. The upper value, 5.0, is unusual, even for large fish, though it occurs in apex predators of marine mammals, such as polar bears and orcas.
148:
based on material eaten (plant: green shades are live, brown shades are dead; animal: red shades are live, purple shades are dead; or particulate: grey shades) and feeding strategy (gatherer: lighter shade of each color; miner: darker shade of each
459:
sets the values of trophic levels to one in plants and detritus, two in herbivores and detritivores (primary consumers), three in secondary consumers, and so on. The definition of the trophic level, TL, for any consumer species is:
82:
is a succession of organisms that eat other organisms and may, in turn, be eaten themselves. The trophic level of an organism is the number of steps it is from the start of the chain. A food web starts at trophic level 1 with
2349:
Price, P. W. Price; Bouton, C. E.; Gross, P.; McPheron, B. A.; Thompson, J. N.; Weis, A. E. (1980). "Interactions Among Three Trophic Levels: Influence of Plants on Interactions Between Insect Herbivores and Natural Enemies".
1069: 804: 1898: 315: 1942:
Gorlova, E. N.; Krylovich, O. A.; Tiunov, A. V.; Khasanov, B. F.; Vasyukov, D. D.; Savinetsk y, A. B. (March 2015). "Stable-Isotope Analysis as a Method of Taxonomical Identification of Archaeozoological Material".
551: 334: 444:
carnivores. A large carnivore may eat both smaller carnivores and herbivores; the bobcat eats rabbits, but the mountain lion eats both bobcats and rabbits. Animals can also eat each other; the
233:
Trophic levels can be represented by numbers, starting at level 1 with plants. Further trophic levels are numbered subsequently according to how far the organism is along the food chain.
296: 419:
Both the number of trophic levels and the complexity of relationships between them evolve as life diversifies through time, the exception being intermittent mass extinction events.
4462: 277: 4954: 383:
illustrates how much energy is needed as it flows upward to support the next trophic level. Only about 10% of the energy transferred between each trophic level is converted to
883: 2214: 1999: 1584: 1524: 623: 1196: 1135: 839: 586: 1166: 1101: 1219: 4457: 221:) break down dead plant and animal material and wastes and release it again as energy and nutrients into the ecosystem for recycling. Decomposers, such as 924:
web. In 2000, this led Pauly and others to construct a "Fisheries in Balance" index, usually called the FiB index. The FiB index is defined, for any year
2055: 2387: 1945: 936: 700: 229:(mushrooms), feed on waste and dead matter, converting it into inorganic chemicals that can be recycled as mineral nutrients for plants to use again. 99:
at level 4 or 5. The path along the chain can form either a one-way flow or a part of a wider food "web". Ecological communities with higher
2054:
Branch, T.A.; Watson, Reg; Fulton, Elizabeth A.; Jennings, Simon; McGilliard, Carey R.; Pablico, Grace T.; Ricard, Daniel; Tracey, Sean R. (2010).
1333: 4487: 644:
In addition to observational studies of animal behavior, and quantification of animal stomach contents, trophic level can be quantified through
452:
and crayfish eat young bullfrogs. The feeding habits of a juvenile animal, and, as a consequence, its trophic level, can change as it grows up.
3162: 2415: 3979: 169:. Plants and algae do not usually eat other organisms, but pull nutrients from the soil or the ocean and manufacture their own food using 4327: 3306: 199:
that cannot manufacture their own food and need to consume other organisms. Animals that eat primary producers (like plants) are called
4072: 3376: 4302: 2948: 2913: 2304:
Kareiva, Peter; Sahakian, Robert (1990). "Tritrophic effects of a simple architectural mutation in pea plants". Letters to Nature.
1234: 270:
have no predators (with members of their own species a possible exception) and are at the highest numbered level of their food web.
407:. Consumers at each level convert on average only about 10% of the chemical energy in their food to their own organic tissue (the 4477: 4262: 3386: 3114: 468: 1665: 1481: 1453: 1426: 676:
The mean trophic level of the world fisheries catch has steadily declined because many high trophic level fish, such as this
4492: 3391: 1767:; Heald, E. J. (1975) "The detritus-based food web of an estuarine mangrove community". Pages 265ā€“286 in L. E. Cronin, ed. 1541: 4590: 4452: 3579: 177:. In this way, it is energy from the sun that usually powers the base of the food chain. An exception occurs in deep-sea 1558: 3332: 3155: 2996: 2408: 688:
In fisheries, the mean trophic level for the fisheries catch across an entire area or ecosystem is calculated for year
4482: 2668: 1907: 4117: 3972: 3129: 3411: 3124: 2991: 2703: 2126:
Pauly, D.; Christensen, V.; Dalsgaard, J.; Froese, R.; Torres, F.C. Jr. (1998). "Fishing down marine food webs".
1979: 1268: 1241: 2208:
Bonhommeau, S.; Dubroca, L.; le Pape, O.; Barde, J.; Kaplan, D.M.; Chassot, E. & Nieblas, A.E. (2013).
4944: 3796: 3669: 2275: 1868: 1830: 17: 2104: 439:
but they are divided into separate populations that hunt specific prey, such as tuna, small sharks, and seals.
3842: 3441: 3396: 3148: 2401: 2928: 403:
The efficiency with which energy or biomass is transferred from one trophic level to the next is called the
4964: 4949: 3274: 4959: 3965: 3631: 2522: 1364: 1225:"backward-bending" plots of trophic level versus catch originally observed by Pauly and others in 1998. 5049: 4267: 3696: 3416: 2903: 2620: 2517: 1532: 1972: 4575: 4469: 3877: 3489: 3381: 3239: 3224: 3219: 2898: 2610: 901: 145: 2393: 5028: 4821: 4816: 4112: 3867: 3862: 3832: 3636: 3099: 2981: 1253: 3140: 2771: 2178:
Fishing Down the Mediterranean Food Webs? Executive Summary. (2000). Briand, F. and K.I. Stergiou
896:
at the higher trophic levels. Earlier reports found precipitous declines in mean trophic level of
4729: 4540: 4434: 4162: 4152: 3711: 3574: 3484: 3352: 3234: 3204: 3061: 3026: 2746: 2713: 2688: 1660:. Evolutionary Foundations of Human Behavior (2nd ed.). Transaction Publishers. p. 12. 396:. The energy transferred between levels can also be thought of as approximating to a transfer in 852: 4555: 4545: 4247: 4232: 3857: 3801: 3736: 3599: 3534: 3469: 3031: 2819: 2527: 2507: 188: 181:, where there is no sunlight. Here primary producers manufacture food through a process called 153:
The three basic ways in which organisms get food are as producers, consumers, and decomposers.
114: 1443: 1416: 4974: 4901: 4836: 4701: 4676: 4651: 4535: 4282: 4062: 3761: 3706: 3569: 3554: 3337: 3294: 3284: 3279: 3036: 3016: 2872: 2862: 2804: 2799: 2635: 2487: 1258: 920: 595: 404: 1171: 1110: 814: 561: 5054: 4709: 4671: 4002: 3887: 3852: 3847: 3771: 3766: 3721: 3619: 3589: 3584: 3436: 3299: 3289: 2834: 2673: 2462: 2315: 2223: 2137: 2072: 2008: 1916: 1790: 1690: 1593: 1263: 1144: 1079: 133:(1926): "producers", "consumers", and "reducers" (modified to "decomposers" by Lindeman). 8: 4931: 4585: 4394: 4352: 4122: 4082: 3937: 3912: 3776: 3746: 3691: 3604: 3494: 3479: 3426: 3259: 3194: 3076: 3006: 2938: 2537: 1764: 1287: 39: 31: 2363: 2319: 2227: 2141: 2076: 2012: 1920: 1794: 1694: 1597: 1472:
Lisowski, M.; Miaoulis, I.; Cyr, M.; Jones, L.C.; Padilla, M.J.; Wellnitz, T.R. (2004).
1201: 892:
Fish at higher trophic levels usually have a higher economic value, which can result in
4851: 4846: 4714: 4656: 4550: 4399: 4317: 4202: 4182: 4092: 4035: 3948: 3897: 3892: 3701: 3664: 3406: 3362: 3327: 3184: 3109: 3011: 2943: 2933: 2867: 2814: 2625: 2570: 2532: 2457: 2367: 2348: 2331: 2246: 2209: 2161: 2096: 2031: 1994: 1806: 1742: 1717: 1616: 1579: 1356: 911:
Humans have a mean trophic level of about 2.21, about the same as a pig or an anchovy.
178: 4861: 4739: 4686: 4605: 4272: 4237: 4177: 4137: 4107: 4077: 3988: 3837: 3806: 3594: 3421: 3229: 3094: 3071: 2809: 2585: 2497: 2482: 2467: 2447: 2271:"Ecopath, ecosim, and ecospace as tools for evaluating ecosystem impact of fisheries" 2251: 2179: 2153: 2128: 2088: 2036: 1747: 1661: 1621: 1477: 1449: 1422: 1307: 445: 397: 384: 130: 58:. They take nutrients from the soil or the water, and manufacture their own food by 2371: 2335: 5059: 4969: 4661: 4565: 4517: 4429: 4322: 4020: 3791: 3654: 3646: 3564: 3446: 3431: 3367: 3347: 3264: 3254: 3249: 3214: 3046: 2986: 2857: 2658: 2600: 2512: 2472: 2359: 2323: 2306: 2284: 2241: 2231: 2190: 2145: 2100: 2080: 2063: 2026: 2016: 1954: 1924: 1877: 1839: 1810: 1798: 1737: 1729: 1698: 1611: 1601: 1348: 1278: 1198:
the mean trophic level of the catch at the start of the series being analyzed, and
634: 347: 174: 126: 84: 55: 2165: 1636: 4939: 4906: 4767: 4719: 4595: 4570: 4379: 4332: 4257: 4102: 4087: 3927: 3786: 3756: 3751: 3741: 3674: 3659: 3539: 3519: 3401: 3269: 3175: 3066: 2976: 2918: 2502: 2428: 2149: 1655: 1382: 1273: 408: 346:
The fungi on this tree feed on dead matter, converting it back to nutrients that
1995:"Global fishery development patterns are driven by profit but not trophic level" 1781:
Pimm, S. L.; Lawton, J. H. (1978). "On feeding on more than one trophic level".
4803: 4757: 4752: 4724: 4691: 4560: 4419: 4347: 4337: 4187: 4132: 4050: 4045: 4040: 3907: 3731: 3684: 3614: 3609: 3504: 3371: 3244: 3051: 3041: 3021: 2824: 2789: 2728: 2605: 2560: 2452: 1958: 1064:{\displaystyle FiB_{y}=\log {\frac {Y_{y}/(TE)^{TL_{y}}}{Y_{0}/(TE)^{TL_{0}}}}} 799:{\displaystyle TL_{y}={\frac {\sum _{i}(TL_{i}\cdot Y_{iy})}{\sum _{i}Y_{iy}}}} 645: 393: 380: 182: 170: 59: 1928: 1903:) from northern British Columbia: Isotopic and zooarchaeological perspectives" 1657:
Human Ecology: The story of our place in nature from prehistory to the present
5043: 5017: 4911: 4876: 4777: 4772: 4747: 4242: 4217: 4067: 4030: 3932: 2908: 2839: 2829: 2784: 2751: 2643: 2477: 2207: 436: 261: 111: 96: 51: 2236: 2021: 1897:
Szpak, Paul; Orchard, Trevor J.; McKechnie, Iain; Grƶcke, Darren R. (2012).
1606: 5003: 4782: 4762: 4666: 4404: 4287: 4207: 4167: 4157: 4127: 3917: 3902: 3559: 3529: 3474: 3357: 3322: 3199: 2698: 2289: 2270: 2255: 2092: 2040: 1882: 1863: 1844: 1825: 1751: 1733: 1625: 456: 325: 218: 100: 2157: 1471: 4916: 4891: 4886: 4856: 4639: 4615: 4580: 4389: 4292: 4212: 4172: 4025: 3209: 2756: 2718: 2693: 2683: 2648: 2595: 2575: 1702: 1681:
Behrenfeld, Michael J. (2014). "Climate-mediated dance of the plankton".
1525:"Fishing down marine food webs: It is far more pervasive than we thought" 893: 309:
eat rabbits at the second trophic level, so they are secondary consumers.
192: 2084: 1221:
is the transfer efficiency of biomass or energy between trophic levels.
4896: 4831: 4620: 4600: 4384: 4357: 4142: 4055: 3922: 3499: 3464: 3104: 3056: 3001: 2971: 2877: 2794: 2738: 2615: 2565: 1360: 681: 341: 214: 79: 5012: 4921: 4826: 4610: 4374: 4367: 4342: 4252: 3957: 3827: 3781: 3509: 2953: 2923: 2723: 2678: 2653: 2590: 2580: 2555: 2547: 2492: 2423: 2327: 1802: 897: 375: 356: 328:
eat foxes at the third trophic level, so they are tertiary consumers.
290:
eat plants at the first trophic level, so they are primary consumers.
204: 200: 158: 92: 88: 1352: 141: 4871: 4681: 4227: 4222: 4147: 3882: 3811: 3342: 3170: 2849: 2761: 2708: 2663: 1563: 661: 449: 360: 258:
Carnivores that eat other carnivores are called tertiary consumers.
222: 208: 75: 71: 427: 4881: 4841: 4811: 4789: 4409: 4197: 4097: 3872: 3679: 3549: 3544: 3171: 3119: 2779: 2424: 196: 4630: 4000: 207:, and animals that eat both plants and other animals are called 4866: 4192: 2125: 1421:(illustrated, reprint ed.). Delmar Learning. p. 537. 649: 287: 1941: 672: 252:
Carnivores that eat herbivores are called secondary consumers.
240:
Plants and algae make their own food and are called producers.
1826:"Standardized diet compositions and trophic levels of sharks" 1718:"Recovery from the most profound mass extinction of all time" 637:
of how much different trophic levels contribute to its food.
226: 166: 162: 47: 2210:"Eating up the world's food web and the human trophic level" 1861: 1580:"Eating up the world's food web and the human trophic level" 4362: 1896: 1862:
Pauly, D.; Trites, A.; Capuli, E.; Christensen, V. (1998).
1674: 677: 657: 653: 432: 2215:
Proceedings of the National Academy of Sciences of the USA
2191:"Researchers calculate human trophic level for first time" 2053: 2000:
Proceedings of the National Academy of Sciences of the USA
1637:"Researchers calculate human trophic level for first time" 1585:
Proceedings of the National Academy of Sciences of the USA
4424: 4414: 1476:. Prentice Hall Science Explorer. Pearson Prentice Hall. 546:{\displaystyle TL_{i}=1+\sum _{j}(TL_{j}\cdot DC_{ij})\!} 306: 2268: 1864:"Diet composition and trophic levels of marine mammals" 1722:
Proceedings of the Royal Society B: Biological Sciences
1653: 246:
Herbivores eat plants and are called primary consumers.
1715: 633:. That is, the consumer trophic level is one plus the 1518: 1516: 1514: 1512: 1510: 1204: 1174: 1147: 1113: 1082: 939: 855: 817: 703: 598: 564: 471: 95:
at level 3 or higher, and typically finish with
2297: 1228: 1946:Archaeology, Ethnology and Anthropology of Eurasia 1507: 1213: 1190: 1160: 1129: 1095: 1063: 877: 833: 798: 617: 580: 545: 1992: 1899:"Historical ecology of late Holocene sea otters ( 542: 5041: 2269:Pauly, D.; Christensen, V.; Walters, C. (2000). 1709: 1441: 2303: 1467: 1465: 1137:is the mean trophic level of the catch at year 1993:Sethi, S.A.; Branch, T.A.; Watson, R. (2010). 1522: 1331: 370: 125:The concept of trophic level was developed by 4263:Stable isotope analysis in aquatic ecosystems 3973: 3156: 2409: 2121: 2119: 2117: 1857: 1855: 1380: 1462: 841:is the annual catch of the species or group 588:is the fractional trophic level of the prey 422: 392:the next in a food chain. This is called an 203:. Animals that eat other animals are called 4328:Freshwater environmental quality parameters 1448:. Princeton University Press. p. 399. 117:(trophē) referring to food or nourishment. 3980: 3966: 3377:Latitudinal gradients in species diversity 3163: 3149: 2416: 2402: 2114: 1973:Ecosystems and human well-being: Synthesis 1852: 1780: 1680: 1634: 1577: 1567:. Fish on line. August 2014. vers. 3. 1445:The Ecology of Deep-sea Hydrothermal Vents 2288: 2262: 2245: 2235: 2056:"Trophic fingerprint of marine fisheries" 2030: 2020: 1881: 1843: 1741: 1615: 1605: 3275:Predatorā€“prey (Lotkaā€“Volterra) equations 2914:Tritrophic interactions in plant defense 2352:Annual Review of Ecology and Systematics 1235:Tritrophic interactions in plant defense 671: 426: 374: 140: 38: 3307:Random generalized Lotkaā€“Volterra model 1334:"The trophic-dynamic aspect of ecology" 27:Position of an organism in a food chain 14: 5042: 3987: 3115:Herbivore adaptations to plant defense 1823: 1716:Sahney, S. & Benton, M.J. (2008). 1495: 1493: 4516: 4515: 3999: 3961: 3144: 2397: 1982:. Island Press. 2005. pp. 32ā€“33. 667: 46:. The plants in this image, and the 3130:Predator avoidance in schooling fish 1501:American Heritage Science Dictionary 1414: 1321:– via www.merriam-webster.com. 129:(1942), based on the terminology of 4591:Oceanic physical-biological process 4453:List of freshwater ecoregions (WWF) 3580:Intermediate disturbance hypothesis 2364:10.1146/annurev.es.11.110180.000353 1771:. Vol. 1. Academic Press, New York. 1523:Pauly, D.; Palomares, M.L. (2005). 1490: 1242:develop defenses against herbivores 648:analysis of animal tissues such as 173:. For this reason, they are called 24: 3333:Ecological effects of biodiversity 2047: 1986: 1965: 1890: 1817: 1385:[The aquatic food cycle]. 25: 5071: 2669:Generalist and specialist species 2381: 2197:(Press release). 3 December 2013. 1908:Journal of Archaeological Science 1503:. Houghton Mifflin Company. 2005. 1393:: 29ā€“79 – via Google Books. 1383:"Der Nahrungskreislauf im Wasser" 1229:Tritrophic and other interactions 885:is the trophic level for species 103:form more complex trophic paths. 74:is the position it occupies in a 5024: 5023: 5011: 4997: 4629: 4301: 4118:Colored dissolved organic matter 3392:Occupancyā€“abundance relationship 1654:Campbell, Bernard Grant (1995). 333: 314: 295: 276: 4463:Latin America and the Caribbean 3412:Relative abundance distribution 3125:Plant defense against herbivory 2992:Competitive exclusion principle 2704:Mesopredator release hypothesis 2342: 2201: 2183: 2172: 1980:Millennium Ecosystem Assessment 1935: 1774: 1758: 1647: 1571: 1561:. Biodiversity and Morphology. 1269:Mesopredator release hypothesis 4945:Ecological values of mangroves 4488:North Pacific Subtropical Gyre 2997:Consumerā€“resource interactions 2276:ICES Journal of Marine Science 1869:ICES Journal of Marine Science 1831:ICES Journal of Marine Science 1635:Yirka, Bob (3 December 2013). 1578:Yirka, Bob (3 December 2013). 1551: 1442:van Dover, Cindy (2000). 1435: 1408: 1374: 1325: 1300: 1039: 1029: 993: 983: 765: 733: 539: 504: 13: 1: 3843:Biological data visualization 3670:Environmental niche modelling 3397:Population viability analysis 2390:BBC. Last updated March 2004. 1294: 900:catch, in a process known as 266:By definition, healthy adult 4965:Marine conservation activism 4950:Fisheries and climate change 3328:Density-dependent inhibition 2150:10.1126/science.279.5352.860 1540:(2): 197ā€“211. Archived from 914: 414: 87:such as plants, can move to 62:, using energy from the sun. 7: 4960:Human impact on marine life 4837:Davidson Seamount Ā§ Ecology 4073:Aquatic population dynamics 3797:Liebig's law of the minimum 3632:Resource selection function 2523:Metabolic theory of ecology 1247: 1244:such as chemical defenses. 625:represents the fraction of 371:Biomass transfer efficiency 136: 10: 5076: 3697:Niche apportionment models 3417:Relative species abundance 2621:Primary nutritional groups 2518:List of feeding behaviours 1959:10.1016/j.aeae.2015.07.013 1533:Bulletin of Marine Science 1312:Merriam-Webster Dictionary 1232: 878:{\displaystyle \ TL_{i}\ } 120: 29: 4991: 4930: 4802: 4738: 4700: 4647: 4638: 4627: 4576:Marine primary production 4528: 4524: 4511: 4470:List of marine ecoregions 4445: 4310: 4299: 4013: 4009: 3995: 3946: 3878:Ecosystem based fisheries 3820: 3720: 3645: 3518: 3490:Interspecific competition 3455: 3382:Minimum viable population 3315: 3240:Maximum sustainable yield 3225:Intraspecific competition 3220:Effective population size 3183: 3100:Anti-predator adaptations 3085: 2964: 2891: 2848: 2770: 2737: 2634: 2611:Photosynthetic efficiency 2546: 2440: 1929:10.1016/j.jas.2011.12.006 1670:– via Google Books. 1458:– via Google Books. 1415:Butz, Stephen D. (2004). 1387:Verh. Deutsch. Zool. Ges. 902:fishing down the food web 423:Fractional trophic levels 4822:Coastal biogeomorphology 4817:Marine coastal ecosystem 3868:Ecological stoichiometry 3833:Alternative stable state 1418:Science of Earth Systems 455:The fisheries scientist 78:. Within a food web, a 30:Not to be confused with 4730:Paradox of the plankton 4541:Diel vertical migration 4435:Freshwater swamp forest 4153:GIS and aquatic science 4001:General components and 3712:Ontogenetic niche shift 3575:Ideal free distribution 3485:Ecological facilitation 3235:Malthusian growth model 3205:Consumer-resource model 3062:Paradox of the plankton 3027:Energy systems language 2747:Chemoorganoheterotrophy 2714:Optimal foraging theory 2689:Heterotrophic nutrition 2237:10.1073/pnas.1305827110 2022:10.1073/pnas.1003236107 1607:10.1073/pnas.1305827110 1332:Lindeman, R.L. (1942). 618:{\displaystyle DC_{ij}} 179:hydrothermal ecosystems 4556:Large marine ecosystem 4248:Shoaling and schooling 3858:Ecological forecasting 3802:Marginal value theorem 3600:Landscape epidemiology 3535:Cross-boundary subsidy 3470:Biological interaction 2820:Microbial intelligence 2508:Green world hypothesis 2290:10.1006/jmsc.2000.0726 1883:10.1006/jmsc.1997.0280 1845:10.1006/jmsc.1999.0489 1734:10.1098/rspb.2007.1370 1381:Heinemann, A. (1926). 1215: 1192: 1191:{\displaystyle TL_{0}} 1162: 1131: 1130:{\displaystyle TL_{y}} 1097: 1065: 879: 835: 834:{\displaystyle Y_{iy}} 800: 685: 619: 582: 581:{\displaystyle TL_{j}} 547: 440: 388: 150: 63: 4975:Marine protected area 4902:Salt pannes and pools 4677:Marine larval ecology 4652:Census of Marine Life 4536:Deep scattering layer 4493:San Francisco Estuary 4458:Africa and Madagascar 4283:Underwater camouflage 4063:Aquatic biomonitoring 4003:freshwater ecosystems 3863:Ecological humanities 3762:Ecological energetics 3707:Niche differentiation 3570:Habitat fragmentation 3338:Ecological extinction 3285:Small population size 3037:Feed conversion ratio 3017:Ecological succession 2949:San Francisco Estuary 2863:Ecological efficiency 2805:Microbial cooperation 1683:Nature Climate Change 1474:Environmental Science 1396:"Also available in". 1259:Energy flow (ecology) 1233:Further information: 1216: 1193: 1163: 1161:{\displaystyle Y_{0}} 1132: 1103:is the catch at year 1098: 1096:{\displaystyle Y_{y}} 1066: 921:transfer efficiencies 880: 836: 801: 675: 620: 583: 548: 430: 405:ecological efficiency 378: 144: 42: 4710:Marine bacteriophage 4672:Marine invertebrates 3888:Evolutionary ecology 3853:Ecological footprint 3848:Ecological economics 3772:Ecological threshold 3767:Ecological indicator 3637:Sourceā€“sink dynamics 3590:Land change modeling 3585:Insular biogeography 3437:Species distribution 3176:Modelling ecosystems 2835:Microbial metabolism 2674:Intraguild predation 2463:Biogeochemical cycle 2429:Modelling ecosystems 1703:10.1038/nclimate2349 1264:Marine trophic level 1202: 1172: 1145: 1111: 1080: 937: 853: 815: 701: 596: 562: 469: 322:Fourth trophic level 284:Second trophic level 4586:Ocean fertilization 4395:Trophic state index 4353:Lake stratification 4083:Aquatic respiration 3938:Theoretical ecology 3913:Natural environment 3777:Ecosystem diversity 3747:Ecological collapse 3737:Bateman's principle 3692:Limiting similarity 3605:Landscape limnology 3427:Species homogeneity 3265:Population modeling 3260:Population dynamics 3077:Trophic state index 2320:1990Natur.345..433K 2228:2013PNAS..11020617B 2222:(51): 20617ā€“20620. 2142:1998Sci...279..860P 2110:on 9 February 2014. 2085:10.1038/nature09528 2077:2010Natur.468..431B 2013:2010PNAS..10712163S 2007:(27): 12163ā€“12167. 1921:2012JArSc..39.1553S 1824:CortĆ©s, E. (1999). 1795:1978Natur.275..542P 1695:2014NatCC...4..880B 1598:2013PNAS..11020617B 1592:(51): 20617ā€“20620. 1288:Trophic state index 303:Third trophic level 146:Consumer categories 44:First trophic level 32:Trophic level index 4852:Intertidal wetland 4847:Intertidal ecology 4715:Marine prokaryotes 4657:Deep-sea community 4551:Iron fertilization 4474:Specific examples 4400:Upland and lowland 4318:Freshwater biology 4183:Microbial food web 4093:Aquatic toxicology 4036:Aquatic adaptation 3989:Aquatic ecosystems 3949:Outline of ecology 3898:Industrial ecology 3893:Functional ecology 3757:Ecological deficit 3702:Niche construction 3665:Ecosystem engineer 3442:Speciesā€“area curve 3363:Introduced species 3178:: Other components 3110:Deimatic behaviour 3012:Ecological network 2944:North Pacific Gyre 2929:hydrothermal vents 2868:Ecological pyramid 2815:Microbial food web 2626:Primary production 2571:Foundation species 1769:Estuarine research 1290:ā€“ applied to lakes 1214:{\displaystyle TE} 1211: 1188: 1158: 1127: 1093: 1061: 889:as defined above. 875: 831: 796: 779: 732: 686: 668:Mean trophic level 615: 578: 543: 503: 441: 389: 151: 64: 5050:Fisheries science 5037: 5036: 5018:Oceans portal 4987: 4986: 4983: 4982: 4862:Hydrothermal vent 4798: 4797: 4687:Seashore wildlife 4518:Marine ecosystems 4507: 4506: 4503: 4502: 4273:Thermal pollution 4238:Ramsar Convention 4178:Microbial ecology 4138:Fisheries science 4078:Aquatic predation 3955: 3954: 3838:Balance of nature 3595:Landscape ecology 3480:Community ecology 3422:Species diversity 3358:Indicator species 3353:Gradient analysis 3230:Logistic function 3138: 3137: 3095:Animal coloration 3072:Trophic mutualism 2810:Microbial ecology 2601:Photoheterotrophs 2586:Myco-heterotrophy 2498:Ecosystem ecology 2483:Carrying capacity 2448:Abiotic component 2314:(6274): 433ā€“434. 2136:(5352): 860ā€“863. 2071:(7322): 431ā€“435. 1789:(5680): 542ā€“544. 1667:978-0-202-36660-9 1483:978-0-13-115090-4 1455:978-0-691-04929-8 1428:978-0-7668-3391-3 1398:Zool. Anz. Suppl. 1370:on 29 March 2017. 1059: 874: 858: 794: 770: 723: 494: 348:primary producers 175:primary producers 131:August Thienemann 110:derives from the 91:at level 2, 85:primary producers 56:primary producers 54:in the lake, are 16:(Redirected from 5067: 5027: 5026: 5020: 5016: 5015: 5006: 5004:Lakes portal 5002: 5001: 5000: 4970:Marine pollution 4662:Deep-water coral 4645: 4644: 4633: 4566:Marine chemistry 4526: 4525: 4513: 4512: 4430:Freshwater marsh 4323:Freshwater biome 4305: 4021:Acoustic ecology 4011: 4010: 3997: 3996: 3982: 3975: 3968: 3959: 3958: 3655:Ecological niche 3627:selection theory 3447:Umbrella species 3432:Species richness 3368:Invasive species 3348:Flagship species 3255:Population cycle 3250:Overexploitation 3215:Ecological yield 3165: 3158: 3151: 3142: 3141: 3047:Mesotrophic soil 2987:Climax community 2919:Marine food webs 2858:Biomagnification 2659:Chemoorganotroph 2513:Keystone species 2473:Biotic component 2418: 2411: 2404: 2395: 2394: 2376: 2375: 2346: 2340: 2339: 2328:10.1038/345433a0 2301: 2295: 2294: 2292: 2266: 2260: 2259: 2249: 2239: 2205: 2199: 2198: 2187: 2181: 2176: 2170: 2169: 2123: 2112: 2111: 2109: 2103:. Archived from 2060: 2051: 2045: 2044: 2034: 2024: 1990: 1984: 1983: 1977: 1969: 1963: 1962: 1939: 1933: 1932: 1915:(5): 1553ā€“1571. 1894: 1888: 1887: 1885: 1859: 1850: 1849: 1847: 1821: 1815: 1814: 1803:10.1038/275542a0 1778: 1772: 1762: 1756: 1755: 1745: 1728:(1636): 759ā€“65. 1713: 1707: 1706: 1678: 1672: 1671: 1651: 1645: 1644: 1643:(Press release). 1629: 1619: 1609: 1575: 1569: 1568: 1559:"Table 3.5" 1555: 1549: 1548: 1546: 1529: 1520: 1505: 1504: 1497: 1488: 1487: 1469: 1460: 1459: 1439: 1433: 1432: 1412: 1406: 1405: 1394: 1378: 1372: 1371: 1369: 1363:. Archived from 1338: 1329: 1323: 1322: 1320: 1318: 1304: 1279:Trophic dynamics 1220: 1218: 1217: 1212: 1197: 1195: 1194: 1189: 1187: 1186: 1167: 1165: 1164: 1159: 1157: 1156: 1136: 1134: 1133: 1128: 1126: 1125: 1102: 1100: 1099: 1094: 1092: 1091: 1070: 1068: 1067: 1062: 1060: 1058: 1057: 1056: 1055: 1054: 1028: 1023: 1022: 1012: 1011: 1010: 1009: 1008: 982: 977: 976: 966: 955: 954: 888: 884: 882: 881: 876: 872: 871: 870: 856: 848: 844: 840: 838: 837: 832: 830: 829: 805: 803: 802: 797: 795: 793: 792: 791: 778: 768: 764: 763: 748: 747: 731: 721: 716: 715: 691: 635:weighted average 624: 622: 621: 616: 614: 613: 587: 585: 584: 579: 577: 576: 552: 550: 549: 544: 538: 537: 519: 518: 502: 484: 483: 409:ten-per cent law 337: 318: 299: 280: 161:) are typically 127:Raymond Lindeman 21: 5075: 5074: 5070: 5069: 5068: 5066: 5065: 5064: 5040: 5039: 5038: 5033: 5010: 5009: 4998: 4996: 4995: 4979: 4940:Coral bleaching 4926: 4907:Seagrass meadow 4804:Marine habitats 4794: 4768:Coral reef fish 4734: 4720:Marine protists 4696: 4634: 4625: 4596:Ocean turbidity 4571:Marine food web 4520: 4499: 4441: 4380:River ecosystem 4333:Freshwater fish 4306: 4297: 4103:Bioluminescence 4088:Aquatic science 4005: 3991: 3986: 3956: 3951: 3942: 3928:Systems ecology 3816: 3787:Extinction debt 3752:Ecological debt 3742:Bioluminescence 3723: 3716: 3685:marine habitats 3660:Ecological trap 3641: 3521: 3514: 3457: 3451: 3407:Rapoport's rule 3402:Priority effect 3343:Endemic species 3311: 3270:Population size 3186: 3179: 3169: 3139: 3134: 3087: 3081: 3067:Trophic cascade 2977:Bioaccumulation 2960: 2887: 2844: 2766: 2733: 2630: 2542: 2503:Ecosystem model 2436: 2422: 2384: 2379: 2347: 2343: 2302: 2298: 2267: 2263: 2206: 2202: 2189: 2188: 2184: 2177: 2173: 2124: 2115: 2107: 2058: 2052: 2048: 1991: 1987: 1975: 1971: 1970: 1966: 1940: 1936: 1895: 1891: 1860: 1853: 1822: 1818: 1779: 1775: 1763: 1759: 1714: 1710: 1689:(10): 880ā€“887. 1679: 1675: 1668: 1652: 1648: 1576: 1572: 1557: 1556: 1552: 1547:on 14 May 2013. 1544: 1527: 1521: 1508: 1499: 1498: 1491: 1484: 1470: 1463: 1456: 1440: 1436: 1429: 1413: 1409: 1395: 1379: 1375: 1367: 1353:10.2307/1930126 1336: 1330: 1326: 1316: 1314: 1306: 1305: 1301: 1297: 1274:Trophic cascade 1250: 1237: 1231: 1203: 1200: 1199: 1182: 1178: 1173: 1170: 1169: 1152: 1148: 1146: 1143: 1142: 1121: 1117: 1112: 1109: 1108: 1087: 1083: 1081: 1078: 1077: 1050: 1046: 1042: 1038: 1024: 1018: 1014: 1013: 1004: 1000: 996: 992: 978: 972: 968: 967: 965: 950: 946: 938: 935: 934: 917: 886: 866: 862: 854: 851: 850: 846: 842: 822: 818: 816: 813: 812: 784: 780: 774: 769: 756: 752: 743: 739: 727: 722: 720: 711: 707: 702: 699: 698: 689: 670: 629:in the diet of 606: 602: 597: 594: 593: 572: 568: 563: 560: 559: 530: 526: 514: 510: 498: 479: 475: 470: 467: 466: 431:Killer whales ( 425: 417: 373: 351: 345: 338: 329: 324: 319: 310: 305: 300: 291: 286: 281: 139: 123: 35: 28: 23: 22: 15: 12: 11: 5: 5073: 5063: 5062: 5057: 5052: 5035: 5034: 5032: 5031: 5021: 5007: 4992: 4989: 4988: 4985: 4984: 4981: 4980: 4978: 4977: 4972: 4967: 4962: 4957: 4952: 4947: 4942: 4936: 4934: 4928: 4927: 4925: 4924: 4919: 4914: 4909: 4904: 4899: 4894: 4889: 4884: 4879: 4874: 4869: 4864: 4859: 4854: 4849: 4844: 4839: 4834: 4829: 4824: 4819: 4814: 4808: 4806: 4800: 4799: 4796: 4795: 4793: 4792: 4787: 4786: 4785: 4780: 4775: 4770: 4765: 4758:Saltwater fish 4755: 4753:Marine reptile 4750: 4744: 4742: 4736: 4735: 4733: 4732: 4727: 4725:Marine viruses 4722: 4717: 4712: 4706: 4704: 4702:Microorganisms 4698: 4697: 4695: 4694: 4692:Wild fisheries 4689: 4684: 4679: 4674: 4669: 4664: 4659: 4654: 4648: 4642: 4636: 4635: 4628: 4626: 4624: 4623: 4618: 4613: 4608: 4606:Thorson's rule 4603: 4598: 4593: 4588: 4583: 4578: 4573: 4568: 4563: 4561:Marine biology 4558: 4553: 4548: 4543: 4538: 4532: 4530: 4522: 4521: 4509: 4508: 4505: 4504: 4501: 4500: 4498: 4497: 4496: 4495: 4490: 4485: 4480: 4472: 4467: 4466: 4465: 4460: 4449: 4447: 4443: 4442: 4440: 4439: 4438: 4437: 4432: 4427: 4422: 4420:Brackish marsh 4417: 4407: 4402: 4397: 4392: 4387: 4382: 4377: 4372: 4371: 4370: 4360: 4355: 4350: 4348:Lake ecosystem 4345: 4340: 4338:Hyporheic zone 4335: 4330: 4325: 4320: 4314: 4312: 4308: 4307: 4300: 4298: 4296: 4295: 4290: 4285: 4280: 4275: 4270: 4265: 4260: 4255: 4250: 4245: 4240: 4235: 4230: 4225: 4220: 4215: 4210: 4205: 4200: 4195: 4190: 4188:Microbial loop 4185: 4180: 4175: 4170: 4165: 4160: 4155: 4150: 4145: 4140: 4135: 4133:Eutrophication 4130: 4125: 4120: 4115: 4113:Cascade effect 4110: 4105: 4100: 4095: 4090: 4085: 4080: 4075: 4070: 4065: 4060: 4059: 4058: 4053: 4048: 4041:Aquatic animal 4038: 4033: 4028: 4023: 4017: 4015: 4007: 4006: 3993: 3992: 3985: 3984: 3977: 3970: 3962: 3953: 3952: 3947: 3944: 3943: 3941: 3940: 3935: 3930: 3925: 3920: 3915: 3910: 3908:Microecosystem 3905: 3900: 3895: 3890: 3885: 3880: 3875: 3870: 3865: 3860: 3855: 3850: 3845: 3840: 3835: 3830: 3824: 3822: 3818: 3817: 3815: 3814: 3809: 3807:Thorson's rule 3804: 3799: 3794: 3789: 3784: 3779: 3774: 3769: 3764: 3759: 3754: 3749: 3744: 3739: 3734: 3732:Assembly rules 3728: 3726: 3718: 3717: 3715: 3714: 3709: 3704: 3699: 3694: 3689: 3688: 3687: 3677: 3672: 3667: 3662: 3657: 3651: 3649: 3643: 3642: 3640: 3639: 3634: 3629: 3617: 3615:Patch dynamics 3612: 3610:Metapopulation 3607: 3602: 3597: 3592: 3587: 3582: 3577: 3572: 3567: 3562: 3557: 3552: 3547: 3542: 3537: 3532: 3526: 3524: 3516: 3515: 3513: 3512: 3507: 3505:Storage effect 3502: 3497: 3492: 3487: 3482: 3477: 3472: 3467: 3461: 3459: 3453: 3452: 3450: 3449: 3444: 3439: 3434: 3429: 3424: 3419: 3414: 3409: 3404: 3399: 3394: 3389: 3387:Neutral theory 3384: 3379: 3374: 3372:Native species 3365: 3360: 3355: 3350: 3345: 3340: 3335: 3330: 3325: 3319: 3317: 3313: 3312: 3310: 3309: 3304: 3303: 3302: 3297: 3287: 3282: 3277: 3272: 3267: 3262: 3257: 3252: 3247: 3245:Overpopulation 3242: 3237: 3232: 3227: 3222: 3217: 3212: 3207: 3202: 3197: 3191: 3189: 3181: 3180: 3168: 3167: 3160: 3153: 3145: 3136: 3135: 3133: 3132: 3127: 3122: 3117: 3112: 3107: 3102: 3097: 3091: 3089: 3083: 3082: 3080: 3079: 3074: 3069: 3064: 3059: 3054: 3052:Nutrient cycle 3049: 3044: 3042:Feeding frenzy 3039: 3034: 3029: 3024: 3022:Energy quality 3019: 3014: 3009: 3004: 2999: 2994: 2989: 2984: 2982:Cascade effect 2979: 2974: 2968: 2966: 2962: 2961: 2959: 2958: 2957: 2956: 2951: 2946: 2941: 2936: 2931: 2926: 2916: 2911: 2906: 2901: 2895: 2893: 2889: 2888: 2886: 2885: 2880: 2875: 2870: 2865: 2860: 2854: 2852: 2846: 2845: 2843: 2842: 2837: 2832: 2827: 2825:Microbial loop 2822: 2817: 2812: 2807: 2802: 2797: 2792: 2790:Lithoautotroph 2787: 2782: 2776: 2774: 2772:Microorganisms 2768: 2767: 2765: 2764: 2759: 2754: 2749: 2743: 2741: 2735: 2734: 2732: 2731: 2729:Prey switching 2726: 2721: 2716: 2711: 2706: 2701: 2696: 2691: 2686: 2681: 2676: 2671: 2666: 2661: 2656: 2651: 2646: 2640: 2638: 2632: 2631: 2629: 2628: 2623: 2618: 2613: 2608: 2606:Photosynthesis 2603: 2598: 2593: 2588: 2583: 2578: 2573: 2568: 2563: 2561:Chemosynthesis 2558: 2552: 2550: 2544: 2543: 2541: 2540: 2535: 2530: 2525: 2520: 2515: 2510: 2505: 2500: 2495: 2490: 2485: 2480: 2475: 2470: 2465: 2460: 2455: 2453:Abiotic stress 2450: 2444: 2442: 2438: 2437: 2421: 2420: 2413: 2406: 2398: 2392: 2391: 2388:Trophic levels 2383: 2382:External links 2380: 2378: 2377: 2341: 2296: 2283:(3): 697ā€“706. 2261: 2200: 2182: 2171: 2113: 2046: 1985: 1964: 1953:(1): 110ā€“121. 1934: 1901:Enhydra lutris 1889: 1876:(3): 467ā€“481. 1851: 1838:(5): 707ā€“717. 1816: 1773: 1757: 1708: 1673: 1666: 1646: 1633: 1632: 1570: 1550: 1506: 1489: 1482: 1461: 1454: 1434: 1427: 1407: 1373: 1347:(4): 399ā€“418. 1324: 1298: 1296: 1293: 1292: 1291: 1285: 1276: 1271: 1266: 1261: 1256: 1254:Cascade effect 1249: 1246: 1230: 1227: 1210: 1207: 1185: 1181: 1177: 1168:is the catch, 1155: 1151: 1124: 1120: 1116: 1090: 1086: 1074: 1073: 1072: 1071: 1053: 1049: 1045: 1041: 1037: 1034: 1031: 1027: 1021: 1017: 1007: 1003: 999: 995: 991: 988: 985: 981: 975: 971: 964: 961: 958: 953: 949: 945: 942: 919:Since biomass 916: 913: 869: 865: 861: 828: 825: 821: 809: 808: 807: 806: 790: 787: 783: 777: 773: 767: 762: 759: 755: 751: 746: 742: 738: 735: 730: 726: 719: 714: 710: 706: 669: 666: 646:stable isotope 612: 609: 605: 601: 575: 571: 567: 556: 555: 554: 553: 541: 536: 533: 529: 525: 522: 517: 513: 509: 506: 501: 497: 493: 490: 487: 482: 478: 474: 437:apex predators 424: 421: 416: 413: 394:energy pyramid 381:energy pyramid 372: 369: 355:In real-world 353: 352: 339: 332: 330: 320: 313: 311: 301: 294: 292: 282: 275: 272: 271: 268:apex predators 264: 259: 256: 253: 250: 247: 244: 241: 238: 231: 230: 212: 186: 183:chemosynthesis 171:photosynthesis 138: 135: 122: 119: 97:apex predators 60:photosynthesis 26: 18:Trophic levels 9: 6: 4: 3: 2: 5072: 5061: 5058: 5056: 5053: 5051: 5048: 5047: 5045: 5030: 5022: 5019: 5014: 5008: 5005: 4994: 4993: 4990: 4976: 4973: 4971: 4968: 4966: 4963: 4961: 4958: 4956: 4953: 4951: 4948: 4946: 4943: 4941: 4938: 4937: 4935: 4933: 4929: 4923: 4920: 4918: 4915: 4913: 4912:Sponge ground 4910: 4908: 4905: 4903: 4900: 4898: 4895: 4893: 4890: 4888: 4885: 4883: 4880: 4878: 4877:Marine biomes 4875: 4873: 4870: 4868: 4865: 4863: 4860: 4858: 4855: 4853: 4850: 4848: 4845: 4843: 4840: 4838: 4835: 4833: 4830: 4828: 4825: 4823: 4820: 4818: 4815: 4813: 4810: 4809: 4807: 4805: 4801: 4791: 4788: 4784: 4781: 4779: 4778:Demersal fish 4776: 4774: 4773:Deep-sea fish 4771: 4769: 4766: 4764: 4761: 4760: 4759: 4756: 4754: 4751: 4749: 4748:Marine mammal 4746: 4745: 4743: 4741: 4737: 4731: 4728: 4726: 4723: 4721: 4718: 4716: 4713: 4711: 4708: 4707: 4705: 4703: 4699: 4693: 4690: 4688: 4685: 4683: 4680: 4678: 4675: 4673: 4670: 4668: 4665: 4663: 4660: 4658: 4655: 4653: 4650: 4649: 4646: 4643: 4641: 4637: 4632: 4622: 4619: 4617: 4614: 4612: 4609: 4607: 4604: 4602: 4599: 4597: 4594: 4592: 4589: 4587: 4584: 4582: 4579: 4577: 4574: 4572: 4569: 4567: 4564: 4562: 4559: 4557: 4554: 4552: 4549: 4547: 4544: 4542: 4539: 4537: 4534: 4533: 4531: 4527: 4523: 4519: 4514: 4510: 4494: 4491: 4489: 4486: 4484: 4481: 4479: 4476: 4475: 4473: 4471: 4468: 4464: 4461: 4459: 4456: 4455: 4454: 4451: 4450: 4448: 4444: 4436: 4433: 4431: 4428: 4426: 4423: 4421: 4418: 4416: 4413: 4412: 4411: 4408: 4406: 4403: 4401: 4398: 4396: 4393: 4391: 4388: 4386: 4383: 4381: 4378: 4376: 4373: 4369: 4366: 4365: 4364: 4361: 4359: 4356: 4354: 4351: 4349: 4346: 4344: 4341: 4339: 4336: 4334: 4331: 4329: 4326: 4324: 4321: 4319: 4316: 4315: 4313: 4309: 4304: 4294: 4291: 4289: 4286: 4284: 4281: 4279: 4278:Trophic level 4276: 4274: 4271: 4269: 4266: 4264: 4261: 4259: 4256: 4254: 4251: 4249: 4246: 4244: 4243:Sediment trap 4241: 4239: 4236: 4234: 4231: 4229: 4226: 4224: 4221: 4219: 4218:Phytoplankton 4216: 4214: 4211: 4209: 4206: 4204: 4201: 4199: 4196: 4194: 4191: 4189: 4186: 4184: 4181: 4179: 4176: 4174: 4171: 4169: 4166: 4164: 4161: 4159: 4156: 4154: 4151: 4149: 4146: 4144: 4141: 4139: 4136: 4134: 4131: 4129: 4126: 4124: 4121: 4119: 4116: 4114: 4111: 4109: 4106: 4104: 4101: 4099: 4096: 4094: 4091: 4089: 4086: 4084: 4081: 4079: 4076: 4074: 4071: 4069: 4068:Aquatic plant 4066: 4064: 4061: 4057: 4054: 4052: 4049: 4047: 4044: 4043: 4042: 4039: 4037: 4034: 4032: 4031:Anoxic waters 4029: 4027: 4024: 4022: 4019: 4018: 4016: 4012: 4008: 4004: 3998: 3994: 3990: 3983: 3978: 3976: 3971: 3969: 3964: 3963: 3960: 3950: 3945: 3939: 3936: 3934: 3933:Urban ecology 3931: 3929: 3926: 3924: 3921: 3919: 3916: 3914: 3911: 3909: 3906: 3904: 3901: 3899: 3896: 3894: 3891: 3889: 3886: 3884: 3881: 3879: 3876: 3874: 3871: 3869: 3866: 3864: 3861: 3859: 3856: 3854: 3851: 3849: 3846: 3844: 3841: 3839: 3836: 3834: 3831: 3829: 3826: 3825: 3823: 3819: 3813: 3810: 3808: 3805: 3803: 3800: 3798: 3795: 3793: 3792:Kleiber's law 3790: 3788: 3785: 3783: 3780: 3778: 3775: 3773: 3770: 3768: 3765: 3763: 3760: 3758: 3755: 3753: 3750: 3748: 3745: 3743: 3740: 3738: 3735: 3733: 3730: 3729: 3727: 3725: 3719: 3713: 3710: 3708: 3705: 3703: 3700: 3698: 3695: 3693: 3690: 3686: 3683: 3682: 3681: 3678: 3676: 3673: 3671: 3668: 3666: 3663: 3661: 3658: 3656: 3653: 3652: 3650: 3648: 3644: 3638: 3635: 3633: 3630: 3628: 3626: 3622: 3618: 3616: 3613: 3611: 3608: 3606: 3603: 3601: 3598: 3596: 3593: 3591: 3588: 3586: 3583: 3581: 3578: 3576: 3573: 3571: 3568: 3566: 3565:Foster's rule 3563: 3561: 3558: 3556: 3553: 3551: 3548: 3546: 3543: 3541: 3538: 3536: 3533: 3531: 3528: 3527: 3525: 3523: 3517: 3511: 3508: 3506: 3503: 3501: 3498: 3496: 3493: 3491: 3488: 3486: 3483: 3481: 3478: 3476: 3473: 3471: 3468: 3466: 3463: 3462: 3460: 3454: 3448: 3445: 3443: 3440: 3438: 3435: 3433: 3430: 3428: 3425: 3423: 3420: 3418: 3415: 3413: 3410: 3408: 3405: 3403: 3400: 3398: 3395: 3393: 3390: 3388: 3385: 3383: 3380: 3378: 3375: 3373: 3369: 3366: 3364: 3361: 3359: 3356: 3354: 3351: 3349: 3346: 3344: 3341: 3339: 3336: 3334: 3331: 3329: 3326: 3324: 3321: 3320: 3318: 3314: 3308: 3305: 3301: 3298: 3296: 3293: 3292: 3291: 3288: 3286: 3283: 3281: 3278: 3276: 3273: 3271: 3268: 3266: 3263: 3261: 3258: 3256: 3253: 3251: 3248: 3246: 3243: 3241: 3238: 3236: 3233: 3231: 3228: 3226: 3223: 3221: 3218: 3216: 3213: 3211: 3208: 3206: 3203: 3201: 3198: 3196: 3193: 3192: 3190: 3188: 3182: 3177: 3173: 3166: 3161: 3159: 3154: 3152: 3147: 3146: 3143: 3131: 3128: 3126: 3123: 3121: 3118: 3116: 3113: 3111: 3108: 3106: 3103: 3101: 3098: 3096: 3093: 3092: 3090: 3084: 3078: 3075: 3073: 3070: 3068: 3065: 3063: 3060: 3058: 3055: 3053: 3050: 3048: 3045: 3043: 3040: 3038: 3035: 3033: 3030: 3028: 3025: 3023: 3020: 3018: 3015: 3013: 3010: 3008: 3005: 3003: 3000: 2998: 2995: 2993: 2990: 2988: 2985: 2983: 2980: 2978: 2975: 2973: 2970: 2969: 2967: 2963: 2955: 2952: 2950: 2947: 2945: 2942: 2940: 2937: 2935: 2932: 2930: 2927: 2925: 2922: 2921: 2920: 2917: 2915: 2912: 2910: 2907: 2905: 2902: 2900: 2897: 2896: 2894: 2890: 2884: 2883:Trophic level 2881: 2879: 2876: 2874: 2871: 2869: 2866: 2864: 2861: 2859: 2856: 2855: 2853: 2851: 2847: 2841: 2840:Phage ecology 2838: 2836: 2833: 2831: 2830:Microbial mat 2828: 2826: 2823: 2821: 2818: 2816: 2813: 2811: 2808: 2806: 2803: 2801: 2798: 2796: 2793: 2791: 2788: 2786: 2785:Bacteriophage 2783: 2781: 2778: 2777: 2775: 2773: 2769: 2763: 2760: 2758: 2755: 2753: 2752:Decomposition 2750: 2748: 2745: 2744: 2742: 2740: 2736: 2730: 2727: 2725: 2722: 2720: 2717: 2715: 2712: 2710: 2707: 2705: 2702: 2700: 2699:Mesopredators 2697: 2695: 2692: 2690: 2687: 2685: 2682: 2680: 2677: 2675: 2672: 2670: 2667: 2665: 2662: 2660: 2657: 2655: 2652: 2650: 2647: 2645: 2644:Apex predator 2642: 2641: 2639: 2637: 2633: 2627: 2624: 2622: 2619: 2617: 2614: 2612: 2609: 2607: 2604: 2602: 2599: 2597: 2594: 2592: 2589: 2587: 2584: 2582: 2579: 2577: 2574: 2572: 2569: 2567: 2564: 2562: 2559: 2557: 2554: 2553: 2551: 2549: 2545: 2539: 2536: 2534: 2531: 2529: 2526: 2524: 2521: 2519: 2516: 2514: 2511: 2509: 2506: 2504: 2501: 2499: 2496: 2494: 2491: 2489: 2486: 2484: 2481: 2479: 2478:Biotic stress 2476: 2474: 2471: 2469: 2466: 2464: 2461: 2459: 2456: 2454: 2451: 2449: 2446: 2445: 2443: 2439: 2434: 2430: 2426: 2419: 2414: 2412: 2407: 2405: 2400: 2399: 2396: 2389: 2386: 2385: 2373: 2369: 2365: 2361: 2357: 2353: 2345: 2337: 2333: 2329: 2325: 2321: 2317: 2313: 2309: 2308: 2300: 2291: 2286: 2282: 2278: 2277: 2272: 2265: 2257: 2253: 2248: 2243: 2238: 2233: 2229: 2225: 2221: 2217: 2216: 2211: 2204: 2196: 2192: 2186: 2180: 2175: 2167: 2163: 2159: 2155: 2151: 2147: 2143: 2139: 2135: 2131: 2130: 2122: 2120: 2118: 2106: 2102: 2098: 2094: 2090: 2086: 2082: 2078: 2074: 2070: 2066: 2065: 2057: 2050: 2042: 2038: 2033: 2028: 2023: 2018: 2014: 2010: 2006: 2002: 2001: 1996: 1989: 1981: 1974: 1968: 1960: 1956: 1952: 1948: 1947: 1938: 1930: 1926: 1922: 1918: 1914: 1910: 1909: 1904: 1902: 1893: 1884: 1879: 1875: 1871: 1870: 1865: 1858: 1856: 1846: 1841: 1837: 1833: 1832: 1827: 1820: 1812: 1808: 1804: 1800: 1796: 1792: 1788: 1784: 1777: 1770: 1766: 1761: 1753: 1749: 1744: 1739: 1735: 1731: 1727: 1723: 1719: 1712: 1704: 1700: 1696: 1692: 1688: 1684: 1677: 1669: 1663: 1659: 1658: 1650: 1642: 1638: 1631: 1630: 1627: 1623: 1618: 1613: 1608: 1603: 1599: 1595: 1591: 1587: 1586: 1581: 1574: 1566: 1565: 1560: 1554: 1543: 1539: 1535: 1534: 1526: 1519: 1517: 1515: 1513: 1511: 1502: 1496: 1494: 1485: 1479: 1475: 1468: 1466: 1457: 1451: 1447: 1446: 1438: 1430: 1424: 1420: 1419: 1411: 1403: 1400:(in German). 1399: 1392: 1389:(in German). 1388: 1384: 1377: 1366: 1362: 1358: 1354: 1350: 1346: 1342: 1335: 1328: 1313: 1309: 1303: 1299: 1289: 1286: 1284: 1280: 1277: 1275: 1272: 1270: 1267: 1265: 1262: 1260: 1257: 1255: 1252: 1251: 1245: 1243: 1236: 1226: 1222: 1208: 1205: 1183: 1179: 1175: 1153: 1149: 1140: 1122: 1118: 1114: 1106: 1088: 1084: 1051: 1047: 1043: 1035: 1032: 1025: 1019: 1015: 1005: 1001: 997: 989: 986: 979: 973: 969: 962: 959: 956: 951: 947: 943: 940: 933: 932: 931: 930: 929: 927: 922: 912: 909: 907: 903: 899: 895: 890: 867: 863: 859: 826: 823: 819: 788: 785: 781: 775: 771: 760: 757: 753: 749: 744: 740: 736: 728: 724: 717: 712: 708: 704: 697: 696: 695: 694: 693: 683: 679: 674: 665: 663: 659: 655: 651: 647: 642: 638: 636: 632: 628: 610: 607: 603: 599: 591: 573: 569: 565: 534: 531: 527: 523: 520: 515: 511: 507: 499: 495: 491: 488: 485: 480: 476: 472: 465: 464: 463: 462: 461: 458: 453: 451: 447: 438: 434: 429: 420: 412: 410: 406: 401: 399: 395: 386: 382: 377: 368: 364: 362: 358: 349: 344: 343: 336: 331: 327: 326:Golden eagles 323: 317: 312: 308: 304: 298: 293: 289: 285: 279: 274: 273: 269: 265: 263: 262:Apex predator 260: 257: 254: 251: 248: 245: 242: 239: 236: 235: 234: 228: 224: 220: 216: 213: 210: 206: 202: 198: 194: 190: 187: 184: 180: 176: 172: 168: 164: 160: 156: 155: 154: 147: 143: 134: 132: 128: 118: 116: 113: 109: 104: 102: 98: 94: 90: 86: 81: 77: 73: 69: 68:trophic level 61: 57: 53: 52:phytoplankton 49: 45: 41: 37: 33: 19: 4932:Conservation 4783:Pelagic fish 4763:Coastal fish 4667:Marine fungi 4405:Water garden 4288:Water column 4277: 4233:Productivity 4208:Pelagic zone 4168:Macrobenthos 4158:Hydrobiology 4128:Ecohydrology 3918:Regime shift 3903:Macroecology 3624: 3620: 3560:Edge effects 3530:Biogeography 3475:Commensalism 3323:Biodiversity 3200:Allee effect 2939:kelp forests 2892:Example webs 2882: 2757:Detritivores 2596:Organotrophs 2576:Kinetotrophs 2528:Productivity 2432: 2358:(1): 41ā€“65. 2355: 2351: 2344: 2311: 2305: 2299: 2280: 2274: 2264: 2219: 2213: 2203: 2194: 2185: 2174: 2133: 2127: 2105:the original 2068: 2062: 2049: 2004: 1998: 1988: 1967: 1950: 1944: 1937: 1912: 1906: 1900: 1892: 1873: 1867: 1835: 1829: 1819: 1786: 1782: 1776: 1768: 1760: 1725: 1721: 1711: 1686: 1682: 1676: 1656: 1649: 1640: 1589: 1583: 1573: 1562: 1553: 1542:the original 1537: 1531: 1500: 1473: 1444: 1437: 1417: 1410: 1401: 1397: 1390: 1386: 1376: 1365:the original 1344: 1340: 1327: 1315:. Retrieved 1311: 1302: 1282: 1238: 1223: 1138: 1104: 1075: 925: 918: 910: 905: 891: 810: 687: 680:, have been 643: 639: 630: 626: 589: 557: 457:Daniel Pauly 454: 442: 418: 402: 390: 365: 354: 340: 321: 302: 283: 267: 255:Level 4 249:Level 3 243:Level 2 237:Level 1 232: 219:detritivores 193:heterotrophs 152: 124: 107: 105: 101:biodiversity 67: 65: 43: 36: 5055:Food chains 4917:Sponge reef 4892:Rocky shore 4887:Oyster reef 4857:Kelp forest 4740:Vertebrates 4640:Marine life 4616:Viral shunt 4581:Marine snow 4483:Maharashtra 4390:Stream pool 4293:Zooplankton 4213:Photic zone 4173:Meiobenthos 4026:Algal bloom 3555:Disturbance 3458:interaction 3280:Recruitment 3210:Depensation 3002:Copiotrophs 2873:Energy flow 2795:Lithotrophy 2739:Decomposers 2719:Planktivore 2694:Insectivore 2684:Heterotroph 2649:Bacterivore 2616:Phototrophs 2566:Chemotrophs 2538:Restoration 2488:Competition 1765:Odum, W. E. 894:overfishing 342:Decomposers 215:Decomposers 157:Producers ( 5044:Categories 4897:Salt marsh 4832:Coral reef 4621:Whale fall 4601:Photophore 4478:Everglades 4446:Ecoregions 4385:Stream bed 4358:Macrophyte 4311:Freshwater 4143:Food chain 4056:Water bird 3923:Sexecology 3500:Parasitism 3465:Antibiosis 3300:Resistance 3295:Resilience 3185:Population 3105:Camouflage 3057:Oligotroph 2972:Ascendency 2934:intertidal 2924:cold seeps 2878:Food chain 2679:Herbivores 2654:Carnivores 2581:Mixotrophs 2556:Autotrophs 2435:components 1978:(Report). 1295:References 682:overfished 357:ecosystems 205:carnivores 201:herbivores 159:autotrophs 93:carnivores 89:herbivores 80:food chain 4922:Tide pool 4827:Cold seep 4611:Upwelling 4375:Rheotaxis 4368:Fish pond 4343:Limnology 4268:Substrate 4253:Siltation 4123:Dead zone 3828:Allometry 3782:Emergence 3510:Symbiosis 3495:Mutualism 3290:Stability 3195:Abundance 3007:Dominance 2965:Processes 2954:tide pool 2850:Food webs 2724:Predation 2709:Omnivores 2636:Consumers 2591:Mycotroph 2548:Producers 2493:Ecosystem 2458:Behaviour 1308:"Trophic" 963:⁡ 915:FiB index 898:fisheries 772:∑ 750:⋅ 725:∑ 521:⋅ 496:∑ 415:Evolution 209:omnivores 189:Consumers 106:The word 5029:Category 4955:HERMIONE 4872:Mangrove 4682:Seagrass 4228:Pleuston 4223:Plankton 4203:Particle 4148:Food web 3883:Endolith 3812:Xerosere 3724:networks 3540:Ecocline 3086:Defense, 2762:Detritus 2664:Foraging 2533:Resource 2372:53137184 2336:40207145 2256:24297882 2195:Phys.org 2093:21085178 2041:20566867 1752:18198148 1641:Phys.org 1626:24297882 1564:FishBase 1404:: 29ā€“79. 1317:16 April 1283:Food web 1248:See also 845:in year 662:collagen 450:crayfish 446:bullfrog 361:food web 350:can use. 223:bacteria 137:Overview 76:food web 72:organism 5060:Ecology 4882:Mudflat 4842:Estuary 4812:Bay mud 4790:Seabird 4546:f-ratio 4529:General 4410:Wetland 4198:Neuston 4163:Hypoxia 4108:Biomass 4098:Benthos 4014:General 3873:Ecopath 3680:Habitat 3550:Ecotype 3545:Ecotone 3522:ecology 3520:Spatial 3456:Species 3316:Species 3187:ecology 3172:Ecology 3120:Mimicry 3088:counter 3032:f-ratio 2780:Archaea 2468:Biomass 2441:General 2433:Trophic 2425:Ecology 2316:Bibcode 2247:3870703 2224:Bibcode 2158:9452385 2138:Bibcode 2129:Science 2101:4403636 2073:Bibcode 2032:2901455 2009:Bibcode 1917:Bibcode 1811:4161183 1791:Bibcode 1743:2596898 1691:Bibcode 1617:3870703 1594:Bibcode 1361:1930126 1341:Ecology 660:, bone 398:biomass 385:biomass 288:Rabbits 197:species 121:History 108:trophic 4867:Lagoon 4193:Nekton 4051:Mammal 4046:Insect 2904:Rivers 2800:Marine 2370:  2334:  2307:Nature 2254:  2244:  2166:272149 2164:  2156:  2099:  2091:  2064:Nature 2039:  2029:  1809:  1783:Nature 1750:  1740:  1664:  1624:  1614:  1480:  1452:  1425:  1359:  1076:where 873:  857:  849:, and 811:where 650:muscle 592:, and 558:where 435:) are 195:) are 163:plants 149:color) 70:of an 4258:Spawn 3821:Other 3722:Other 3675:Guild 3647:Niche 2899:Lakes 2368:S2CID 2332:S2CID 2162:S2CID 2108:(PDF) 2097:S2CID 2059:(PDF) 1976:(PDF) 1807:S2CID 1545:(PDF) 1528:(PDF) 1368:(PDF) 1357:JSTOR 1337:(PDF) 928:, by 906:et al 448:eats 307:Foxes 227:fungi 167:algae 115:Ļ„ĻĪæĻ†Ī® 112:Greek 48:algae 4363:Pond 2909:Soil 2252:PMID 2154:PMID 2089:PMID 2037:PMID 1748:PMID 1662:ISBN 1622:PMID 1478:ISBN 1450:ISBN 1423:ISBN 1319:2017 692:as: 678:tuna 658:hair 654:skin 433:orca 225:and 66:The 50:and 4425:Fen 4415:Bog 2360:doi 2324:doi 2285:doi 2242:PMC 2232:doi 2220:110 2146:doi 2134:279 2081:doi 2069:468 2027:PMC 2017:doi 2005:107 1955:doi 1925:doi 1878:doi 1840:doi 1799:doi 1787:275 1738:PMC 1730:doi 1726:275 1699:doi 1612:PMC 1602:doi 1590:110 1349:doi 960:log 379:An 165:or 5046:: 3370:/ 3174:: 2431:: 2427:: 2366:. 2356:11 2354:. 2330:. 2322:. 2312:35 2310:. 2281:57 2279:. 2273:. 2250:. 2240:. 2230:. 2218:. 2212:. 2193:. 2160:. 2152:. 2144:. 2132:. 2116:^ 2095:. 2087:. 2079:. 2067:. 2061:. 2035:. 2025:. 2015:. 2003:. 1997:. 1951:43 1949:. 1923:. 1913:39 1911:. 1905:. 1874:55 1872:. 1866:. 1854:^ 1836:56 1834:. 1828:. 1805:. 1797:. 1785:. 1746:. 1736:. 1724:. 1720:. 1697:. 1685:. 1639:. 1620:. 1610:. 1600:. 1588:. 1582:. 1538:76 1536:. 1530:. 1509:^ 1492:^ 1464:^ 1391:31 1355:. 1345:23 1343:. 1339:. 1310:. 1281:ā€“ 1141:, 1107:, 656:, 652:, 3981:e 3974:t 3967:v 3625:K 3623:/ 3621:r 3164:e 3157:t 3150:v 2417:e 2410:t 2403:v 2374:. 2362:: 2338:. 2326:: 2318:: 2293:. 2287:: 2258:. 2234:: 2226:: 2168:. 2148:: 2140:: 2083:: 2075:: 2043:. 2019:: 2011:: 1961:. 1957:: 1931:. 1927:: 1919:: 1886:. 1880:: 1848:. 1842:: 1813:. 1801:: 1793:: 1754:. 1732:: 1705:. 1701:: 1693:: 1687:4 1628:. 1604:: 1596:: 1486:. 1431:. 1402:2 1351:: 1209:E 1206:T 1184:0 1180:L 1176:T 1154:0 1150:Y 1139:y 1123:y 1119:L 1115:T 1105:y 1089:y 1085:Y 1052:0 1048:L 1044:T 1040:) 1036:E 1033:T 1030:( 1026:/ 1020:0 1016:Y 1006:y 1002:L 998:T 994:) 990:E 987:T 984:( 980:/ 974:y 970:Y 957:= 952:y 948:B 944:i 941:F 926:y 887:i 868:i 864:L 860:T 847:y 843:i 827:y 824:i 820:Y 789:y 786:i 782:Y 776:i 766:) 761:y 758:i 754:Y 745:i 741:L 737:T 734:( 729:i 718:= 713:y 709:L 705:T 690:y 684:. 631:i 627:j 611:j 608:i 604:C 600:D 590:j 574:j 570:L 566:T 540:) 535:j 532:i 528:C 524:D 516:j 512:L 508:T 505:( 500:j 492:+ 489:1 486:= 481:i 477:L 473:T 387:. 217:( 211:. 191:( 185:. 34:. 20:)

Index

Trophic levels
Trophic level index

algae
phytoplankton
primary producers
photosynthesis
organism
food web
food chain
primary producers
herbivores
carnivores
apex predators
biodiversity
Greek
Ļ„ĻĪæĻ†Ī®
Raymond Lindeman
August Thienemann

Consumer categories
autotrophs
plants
algae
photosynthesis
primary producers
hydrothermal ecosystems
chemosynthesis
Consumers
heterotrophs

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.

ā†‘