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Socotra Island xeric shrublands

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26: 325: 45: 267:. Abd al Kuri is the westernmost island and lies closest to the African mainland, only 90 km away. Abd al Kuri has an area of 133 km and is dominated by a limestone plateau reaching up to 740 metres elevation. Samhah is 50 km southwest of Socotra with an area of 41 km and also comprises a limestone plateau reaching 680 metres elevation. Darsah lies east of Samhah and is the smallest at 17 km and 350 metres elevation. Abd al Kuri and Samhah are inhabited, but largely deserted during the winter monsoon season. 313:. The mountains are also cooler than the lowlands. Small mountain streams sustain aquatic habitats, and can flow down through the lowlands during the cooler and wetter winter months and during high rainfall events. Sea-facing slopes and cliffs also receive more moisture from sea fogs and orographic precipitation than other lowland areas. 780:, all native species are endemic. There is a very high level of endemism at both species (29 of 31, 94%) and genus levels (5 of 12, 42%). At the species level, endemicity may be even higher, as phylogenetic studies have uncovered substantial hidden diversity. The reptile species include skinks, legless lizards, and one species of 289:
The archipelago is an ancient continental fragment. The opening of the East African Rift created the Gulf of Aden and separated the islands from the Arabian Peninsula starting 18 million years ago. Lower sea levels during the ice ages connected Socotra to Samhah and Darsah, but deeper sea trenches
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A coastal plain, up to 5 km wide, extends around most of Socotra. The coastal plain's soils are mostly alluvial deposits of stone and coarse sand. The Noged Plain along the island's south shore has areas of sand dunes. The center of the island is a plateau, 300 to 700 meters in elevation, composed
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Socotra is the easternmost island in the Socotra Archipelago, and constitutes around 95% of the archipelago's landmass. The island has an area of approximately 3,600 km, and measures 132 kilometres (82 mi) in length and 49.7 kilometres (30.9 mi) in width. Socotra lies some 240 kilometres
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The climate of the ecoregion is tropical and mostly arid. It is influenced by the Indian Ocean's monsoon winds. The April-to-October southwest monsoon brings hot dry winds from the Horn of Africa. The Northeast monsoon arrives during the winter months, from November to March, and brings lower
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says the island had crocodiles and large lizards, and the present reptilian fauna appears to be greatly reduced. Until a few centuries ago, there were rivers and wetlands on the island, greater stocks of the endemic trees, and abundant pasture. The Portuguese recorded the presence of
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Vasconcelos R, Montero-Mendieta S, SimĂł-Riudalbas M, Sindaco R, Santos X, et al. (2016) Unexpectedly High Levels of Cryptic Diversity Uncovered by a Complete DNA Barcoding of Reptiles of the Socotra Archipelago. PLOS ONE 11(3): e0149985.
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Benda, Petr & Nasher, Abdul Karim & Van Damme, Kay & Vallo, Peter & Reiter, AntonĂ­n. (2017). Bats (Mammalia: Chiroptera) of the Eastern Mediterranean and Middle East. Part 14. Bat fauna of the Socotra Archipelago, Yemen.
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Dragon's blood tree is one of the most striking of Socotra's plants. Its red sap was thought to be the dragon's blood of the ancients, sought after as a dye, and today used as paint and varnish. Socotra's various endemic
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in the early 17th century. Now there are only sand gullies, and many native plants only survive where there is greater moisture or protection from livestock. The remaining Socotra fauna is greatly threatened by
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Eric Dinerstein, David Olson, et al. (2017). An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm, BioScience, Volume 67, Issue 6, June 2017, Pages 534–545; Supplemental material 2 table S1b.
705:). The Egyptian mouse-tailed bat has been recorded on all the islands, and the other three species only on Socotra. The other mammals were introduced by humans. The Socotran wild ass is a feral population of 1346:
Apel, M. and Brandis, D. 2000. A new species of freshwater crab (Crustacea: Brachyura: Potamidae) from Socotra Island and description of Socotrapotamon n. gen. Fauna of Arabia 18: 133-144.
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The long geological isolation of the Socotra archipelago and its fierce heat and drought have combined to create a unique and spectacular endemic flora. Botanical field surveys led by the
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has supported such a move, calling on both UNESCO and International Organisation of Protecting Environment to classify the island archipelago among the environmental heritages.
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Open deciduous shrublands are the primary vegetation in the coastal plain and low limestone foothills. Many plants lose their leaves during the dry summer months, and
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Banfield LM, Van Damme K, Miller AG. Evolution and biogeography of the flora of the Socotra archipelago (Yemen). In: Bramwell D, Caujapé-Castells J, eds.
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The ecoregion is at increasing risk from human activities. The WWF describes the Socotra Archipelago's conservation status as "Critical/Endangered".
811: 521:), a strange-looking, umbrella-shaped tree, rises above the shrub layer. Other high-mountain plant communities include low shrublands dominated by 302:
Average annual rainfall ranges from 150 mm on the coastal plain to more than 1,000 mm in the mountains. Rainfall is sporadic and unpredictable.
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in northwestern Socotra are composed of precambrian granites and metamorphic rock, and include Mashanig, the island's highest point (1,519 m).
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Thickets of semi-deciduous shrubs and low trees occur on the limestone plateau and lower slopes of Hajhir Mountains. The predominant shrubs
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Over the two thousand years of human settlement on the islands the environment has slowly but continuously changed, and, according to
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Reptiles constitute a diverse Socotran vertebrate fauna with 31 species. If one excludes the two recently introduced species,
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as threats to Socotra's biodiversity. Socotra has become economically isolated from mainland Yemen since 2014 by the
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were also important historically for medicine and cosmetics. Other endemic plants include the giant succulent tree
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are endemic, with 75% of genera endemic to the archipelago and major radiations in three families, the
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Abd al Kuri, Samhah, and Darsah have desertic climates and no year-round surface streams.
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that store water in leaves and stems are common. The predominant shrubs are the endemics
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There are many endemic invertebrates, including several spiders (such as the tarantula
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Politically, Socotra and most of the other islands are part of Yemen, and constitute
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The mountains intercept moisture-bearing winds, which creates more clouds, fog, and
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Socotra has a uniquely diverse ecosystem. The islands are home to a high number of
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About 15 species of mammals live on Socotra. There are four species of bats, the
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is endemic. It has been described as "the most alien-looking place on Earth."
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are rare. Nighttime dew is an important water source for the islands' plants.
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kept Abd al Kuri separated from the African mainland and the other islands.
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crustacean species are endemic. 95% of the approximately 100 species of
399:. The entire flora of the Socotra Archipelago has been assessed for the 854: 843: 835: 831: 827: 466: 389: 274:. Geographically, Socotra and the rest of its archipelago are part of 171: 713:) that lives in the lowlands of Socotra. Introduced livestock include 666:). Many of the bird species are endangered by predation by non-native 839: 781: 734: 667: 523: 460: 395: 347: 136: 383: 359: 217:
have more impressive numbers. In 2008 Socotra was recognised as a
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Fund, W. (2014). Socotra Island xeric shrublands. Retrieved from
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Taonga, New Zealand Ministry for Culture and Heritage Te Manatu.
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Island Africa: The Evolution of Africa's Rare Plants and Animals
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United Nations Educational, Scientific and Cultural Organization
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http://editors.eol.org/eoearth/Socotra_Island_xeric_shrublands
194: 190: 160: 100: 72: 929:(UNESCO) as a world natural heritage site in July 2008. The 886: 607: 552: 1101:"Islands east of the Horn of Africa and south of Yemen" 901:
named unplanned urbanisation and tourism development,
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FACTBOX-Socotra, jewel of biodiversity in Arabian Sea
815:). Socotra is also one of the homes of the butterfly 603:
The islands' fauna includes several endemic species.
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Josef Suchomel, Josef (2012). "Mammals of Socotra".
1227: 1225: 1223: 857:of Socotra are diverse, with many endemic species. 189:biologists conducted a survey of the archipelago's 1277: 527:, anthropogenic pastures, and rock outcrops with 1220: 1431: 1367:"Box 4.4 Land snails of the Socotra Archipelago" 1064: 1062: 442:rise above the shrub layer. Woody trees include 143:and several smaller islands that constitute the 1070:"EU to protect Socotra archipelago environment" 240:and 380 kilometres (240 mi) south of the 1059: 1034: 1032: 610:species, including six endemic species – the 1336:https://doi.org/10.1371/journal.pone.0149985 1231: 1216:. China Youth International. 25 April 2008. 1180:. Cambridge University Press; 2011:197-225. 1172: 1170: 1168: 1166: 1164: 1162: 973: 892: 201:species, found nowhere else on earth; only 1268: 1266: 1264: 1262: 1260: 1076:. Yemen News Agency (SABA). 15 April 2008. 1029: 974:Huntingford, George Wynn Brereton (1980). 967: 49:Topographic map of the Socotra Archipelago 955: 255:The other islands in the archipelago are 163:, and lies south of the Yemeni mainland. 159:. Politically the archipelago is part of 1159: 323: 1358: 1272: 1257: 1192:"The Most Alien-Looking Place on Earth" 1038: 1432: 1247: 1245: 1243: 1189: 992: 920: 1234:Ethnoflora of the Socotra Archipelago 1095: 1093: 1091: 1089: 1087: 1085: 1083: 92:3,616 km (1,396 sq mi) 899:United Nations Environment Programme 248:mostly of Cretaceous limestone. The 147:. The archipelago is in the western 1364: 1240: 236:(150 mi) east of the coast of 177:Socotra is considered the jewel of 13: 1210:"Socotra islands scenery in Yemen" 1080: 1010: 976:The Periplus of the Erythraean Sea 513:grow on the high mountain slopes. 14: 1466: 1417: 1236:. Royal Botanic Garden Edinburgh. 1232:Miller, A.G.; Morris, M. (2004). 1145:"Socotra Island xeric shrublands" 1123:"Socotra Island xeric shrublands" 925:The island was recognised by the 594:List of endemic plants of Socotra 1190:Abrams, Avi (4 September 2008). 978:. Hakluyt Society. p. 103. 866: 333:Centre for Middle Eastern Plants 299:temperatures and more moisture. 139:that covers the large island of 43: 24: 1387: 1355:Bicyclus, Site of Markku Savela 1349: 1340: 1327: 1312: 1302: 1202: 1183: 1039:Burdick, Alan (25 March 2007). 133:Socotra Island xeric shrublands 19:Socotra Island xeric shrublands 1137: 1115: 1004: 889:and other introduced species. 877:Periplus of the Erythraean Sea 652:Socotra golden-winged grosbeak 337:Royal Botanic Garden Edinburgh 1: 948: 263:, known as The Brothers, and 1455:Deserts and xeric shrublands 1309:10.13140/RG.2.2.14724.63360. 1178:The Biology of Island Floras 1041:"The Wonder Land of Socotra" 230: 78:deserts and xeric shrublands 7: 1322:. Accessed 15 August 2020. 943:List of ecoregions in Yemen 936: 606:The islands have 178 known 10: 1471: 862:List of spiders of Socotra 859: 656:Rhynchostruthus socotranus 591: 293: 197:. They counted nearly 700 185:. In the 1990s, a team of 905:, resource exploitation, 777:Hemidactylus flaviviridis 675:Egyptian mouse-tailed bat 538:Nirarathamnos asarifolius 535:, including the endemics 121: 111: 106: 96: 88: 83: 71: 59: 54: 42: 23: 18: 1426:(landscape photo, notes) 1399:UN Environment Programme 893:Conservation and threats 683:Geoffroy's horseshoe bat 598: 510:Allophylus rhoidiphyllus 504:Cephalocroton socotranus 500:Dense shrub thickets of 319: 311:orographic precipitation 1440:Afrotropical ecoregions 806:Socotra pseudocardisoma 799:) and three species of 763:Suncus madagascariensis 564:Dendrosicyos socotranus 429:Dendrosicyos socotranus 170:; up to a third of its 1450:Environment of Socotra 796:Monocentropus balfouri 759:Madagascan pygmy shrew 455:Ziziphus spina-christi 422:. The succulent trees 328: 1001:. Reuters, 2008-04-23 771:Hemidactylus robustus 695:Asellia italosomalica 502:Searsia thyrsiflora, 327: 1047:. The New York Times 699:Socotran pipistrelle 691:Somalian trident bat 687:Rhinolophus clivosus 640:Cisticola haesitatus 616:Onychognathus frater 567:, the rare Socotran 561:, the cucumber tree 1445:Ecoregions of Yemen 921:World Heritage Site 727:lesser Indian civet 697:), and the endemic 624:Nectarinia balfouri 586:Boswellia socotrana 515:Dragon's blood tree 484:Dirichletia obovata 480:Buxus hildebrandtii 476:Searsia thyrsiflora 425:Euphorbia arbuscula 419:Jatropha unicostata 272:Socotra Governorate 222:World Heritage Site 145:Socotra Archipelago 117:Critical/endangered 113:Conservation status 31:Socotra dragon tree 1374:Friends of Soqotra 1320:Friends of Soqotra 1196:Dark Roasted Blend 787:Chamaeleo monachus 731:Viverricula indica 632:Emberiza socotrana 574:Punica protopunica 519:Dracaena cinnabari 445:Sterculia africana 354:Cephalocrotonopsis 329: 35:Dracaena cinnabari 1424:Baobab on Socotra 1295:978-0-691-08560-9 1274:Kingdon, Jonathan 1147:. EOL. 6 May 2014 1017:www.teara.govt.nz 985:978-0-904180-05-3 679:Rhinopoma cystops 636:Socotra cisticola 489:Carphalea obovata 458:, and species of 413:Croton socotranus 304:Tropical cyclones 282:extension of the 278:– a geologic and 242:Arabian Peninsula 215:Galápagos Islands 157:Arabian Peninsula 155:and south of the 135:is a terrestrial 129: 128: 1462: 1411: 1410: 1408: 1406: 1391: 1385: 1384: 1382: 1380: 1371: 1362: 1356: 1353: 1347: 1344: 1338: 1331: 1325: 1316: 1310: 1306: 1300: 1299: 1283: 1270: 1255: 1249: 1238: 1237: 1229: 1218: 1217: 1206: 1200: 1199: 1187: 1181: 1174: 1157: 1156: 1154: 1152: 1141: 1135: 1134: 1132: 1130: 1125:. Global Species 1119: 1113: 1112: 1110: 1108: 1097: 1078: 1077: 1066: 1057: 1056: 1054: 1052: 1036: 1027: 1026: 1024: 1023: 1008: 1002: 996: 990: 989: 971: 965: 959: 907:invasive species 873:Jonathan Kingdon 818:Bicyclus anynana 801:freshwater crabs 715:dromedary camels 707:African wild ass 648:Passer insularis 612:Socotra starling 408:succulent plants 250:Hajhir Mountains 47: 28: 16: 15: 1470: 1469: 1465: 1464: 1463: 1461: 1460: 1459: 1430: 1429: 1420: 1415: 1414: 1404: 1402: 1393: 1392: 1388: 1378: 1376: 1369: 1365:Neubert, Eike. 1363: 1359: 1354: 1350: 1345: 1341: 1332: 1328: 1317: 1313: 1307: 1303: 1296: 1271: 1258: 1250: 1241: 1230: 1221: 1208: 1207: 1203: 1188: 1184: 1175: 1160: 1150: 1148: 1143: 1142: 1138: 1128: 1126: 1121: 1120: 1116: 1106: 1104: 1099: 1098: 1081: 1068: 1067: 1060: 1050: 1048: 1037: 1030: 1021: 1019: 1009: 1005: 997: 993: 986: 972: 968: 960: 956: 951: 939: 923: 915:Yemen civil war 895: 882:water buffaloes 869: 864: 755:Suncus etruscus 711:Equus africanus 660:Socotra warbler 644:Socotra sparrow 628:Socotra bunting 620:Socotra sunbird 601: 596: 558:Dorstenia gigas 541:and species of 322: 296: 233: 168:endemic species 50: 38: 12: 11: 5: 1468: 1458: 1457: 1452: 1447: 1442: 1428: 1427: 1419: 1418:External links 1416: 1413: 1412: 1386: 1357: 1348: 1339: 1326: 1311: 1301: 1294: 1256: 1239: 1219: 1201: 1182: 1158: 1136: 1114: 1079: 1058: 1028: 1003: 991: 984: 966: 953: 952: 950: 947: 946: 945: 938: 935: 931:European Union 922: 919: 911:climate change 894: 891: 868: 865: 812:Socotrapotamon 751:Etruscan shrew 703:Hypsugo lanzai 600: 597: 533:cushion plants 435:Adenium obesum 335:, part of the 321: 318: 295: 292: 284:Horn of Africa 232: 229: 187:United Nations 153:Horn of Africa 151:, east of the 127: 126: 123: 119: 118: 115: 109: 108: 104: 103: 98: 94: 93: 90: 86: 85: 81: 80: 75: 69: 68: 63: 57: 56: 52: 51: 48: 40: 39: 29: 21: 20: 9: 6: 4: 3: 2: 1467: 1456: 1453: 1451: 1448: 1446: 1443: 1441: 1438: 1437: 1435: 1425: 1422: 1421: 1401:. 20 May 2022 1400: 1396: 1390: 1375: 1368: 1361: 1352: 1343: 1337: 1330: 1324: 1321: 1315: 1305: 1297: 1291: 1287: 1282: 1281: 1275: 1269: 1267: 1265: 1263: 1261: 1254: 1248: 1246: 1244: 1235: 1228: 1226: 1224: 1215: 1211: 1205: 1197: 1193: 1186: 1179: 1173: 1171: 1169: 1167: 1165: 1163: 1146: 1140: 1124: 1118: 1102: 1096: 1094: 1092: 1090: 1088: 1086: 1084: 1075: 1071: 1065: 1063: 1046: 1042: 1035: 1033: 1018: 1014: 1007: 1000: 995: 987: 981: 977: 970: 964: 958: 954: 944: 941: 940: 934: 932: 928: 918: 916: 912: 908: 904: 900: 890: 888: 883: 878: 874: 867:Human impacts 863: 858: 856: 851: 849: 845: 841: 837: 833: 829: 825: 821: 819: 814: 813: 808: 807: 802: 798: 797: 791: 789: 788: 783: 779: 778: 773: 772: 766: 764: 760: 756: 752: 748: 744: 740: 739:Rattus rattus 736: 732: 728: 724: 720: 716: 712: 708: 704: 700: 696: 692: 688: 684: 680: 676: 671: 669: 665: 664:Incana incana 661: 657: 653: 649: 645: 641: 637: 633: 629: 625: 621: 617: 613: 609: 604: 595: 590: 588: 587: 582: 581: 576: 575: 570: 566: 565: 560: 559: 554: 548: 546: 545: 540: 539: 534: 530: 526: 525: 520: 516: 512: 511: 506: 505: 498: 496: 495: 490: 486: 485: 481: 477: 471: 469: 468: 463: 462: 457: 456: 451: 450: 446: 441: 440: 436: 431: 430: 426: 421: 420: 415: 414: 409: 404: 402: 401:IUCN Red List 398: 397: 392: 391: 386: 385: 380: 379: 374: 373: 368: 367: 362: 361: 356: 355: 350: 349: 344: 343: 338: 334: 326: 317: 314: 312: 307: 305: 300: 291: 287: 285: 281: 280:biogeographic 277: 273: 268: 266: 262: 258: 253: 251: 245: 243: 239: 228: 225: 223: 220: 216: 212: 211:New Caledonia 208: 204: 200: 196: 192: 188: 184: 180: 175: 173: 169: 164: 162: 158: 154: 150: 146: 142: 138: 134: 124: 120: 116: 114: 110: 105: 102: 99: 95: 91: 87: 82: 79: 76: 74: 70: 67: 64: 62: 58: 53: 46: 41: 36: 32: 27: 22: 17: 1403:. 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WWF 887:goats 803:(one 599:Fauna 553:aloes 464:and 447:var. 437:spp. 320:Flora 195:fauna 191:flora 161:Yemen 101:Yemen 73:Biome 61:Realm 1407:2024 1381:2024 1290:ISBN 1153:2019 1131:2019 1109:2019 1053:2009 980:ISBN 897:The 853:The 846:and 774:and 608:bird 416:and 372:Haya 259:and 193:and 131:The 89:Area 790:. 765:). 749:), 741:), 733:), 725:), 689:), 681:), 650:), 642:), 634:), 626:), 618:), 577:), 244:. 1436:: 1397:. 1372:. 1286:38 1259:^ 1242:^ 1222:^ 1212:. 1194:. 1161:^ 1082:^ 1072:. 1061:^ 1043:. 1031:^ 1015:. 850:. 784:, 670:. 589:. 547:. 482:, 478:, 452:, 427:, 387:, 381:, 375:, 369:, 363:, 357:, 351:, 345:, 286:. 224:. 209:, 205:, 1409:. 1383:. 1298:. 1198:. 1155:. 1133:. 1111:. 1055:. 1025:. 988:. 820:. 761:( 753:( 745:( 737:( 729:( 721:( 709:( 701:( 693:( 685:( 677:( 662:( 654:( 646:( 638:( 630:( 622:( 614:( 571:( 517:( 37:) 33:(

Index


Socotra dragon tree

Realm
Afrotropical
Biome
deserts and xeric shrublands
Yemen
Conservation status
ecoregion
Socotra
Socotra Archipelago
Indian Ocean
Horn of Africa
Arabian Peninsula
Yemen
endemic species
plant life
biodiversity
Arabian Sea
United Nations
flora
fauna
endemic
New Zealand
Hawaii
New Caledonia
Galápagos Islands
UNESCO
World Heritage Site

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