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The region receives summer monsoon rains characteristic of the west coast, but also rain during the winter months from the easterly trade winds. The trade winds bring winter rain to eastern
Madagascar but across most of the west are intercepted by Madagascar's central highlands. The convergence of
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is 2171 mm. January is rainiest month, averaging 538.4 mm. May to
October are drier months, with the lowest rainfall (24.6 mm) in July. Mean annual temperature averages 25.7 °C at Ambanja, with little seasonal variation and humidity throughout most of the year. As one ascends the slopes of
35:. It has a distinctive lowland climate with year-round rain, differing from the rest of seasonally-dry western and northern Madagascar. The climate supports humid lowland rainforests, with greater similarity to those of
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Human disturbance, has reduced the rainforest to scattered patches. Grasslands are maintained through regular burning, and are used for livestock grazing. Secondary forest, known as
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The predominant natural vegetation in the region is lowland rainforest, although little remains. Mature forests have a canopy of trees 25 to 30 meters high, festooned with abundant
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120:. There is a middle stratum of smaller, shade-tolerant trees, and a sparse understory of ferns, dwarf palms, shrubs, and herbaceous plants.
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easterly wind currents in the lee of the
Tsaratanana Massif is responsible for the Sambirano region's higher rainfall.
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Tsaratanana, rainfall and humidity increase, and temperature and seasonal rainfall variation decrease.
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preserves some enclaves of humid forest along with transitional lowland dry forest.
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is common in disturbed areas. Introduced species are increasingly common, including
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83:, which bounds the region on the east. It also includes the islands of
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are endemic or mostly endemic to the
Sambirano region, including the
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are characteristic canopy trees, along with trees of families
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450:. Monographiae Biologicae. Vol. 21. pp. 727–739.
413:. Monographiae Biologicae. Vol. 21. pp. 191–199.
376:. Monographiae Biologicae. Vol. 21. pp. 145–190.
332:. Monographiae Biologicae. Vol. 21. pp. 87–144.
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The largest remaining area of lowland rainforest is in
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characteristic of the
Madagascar's western lowlands.
444:"The Problems of Nature Conservation in Madagascar"
204:and then left fallow. The palm-like native plant
79:. It extends from the coast to the slopes of the
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16:Biogeographic region of northwestern Madagascar
75:in the south, in the southwestern portion of
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200:, grows in areas which were cleared for
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448:Biogeography and Ecology in Madagascar
411:Biogeography and Ecology in Madagascar
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374:Biogeography and Ecology in Madagascar
330:Biogeography and Ecology in Madagascar
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370:"Flora and Vegetation of Madagascar"
442:Griveaud, P.; Albignac, R. (1972).
63:The region takes its name from the
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326:"The Climatology of Madagascar"
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1:
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456:10.1007/978-94-015-7159-3_23
264:Pariente's fork-marked lemur
55:Landscape of Mont Passot on
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7:
486:Madagascar subhumid forests
419:10.1007/978-94-015-7159-3_5
407:"The Forests of Madagascar"
382:10.1007/978-94-015-7159-3_4
338:10.1007/978-94-015-7159-3_3
300:Manongarivo Special Reserve
103:Average annual rainfall in
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507:
94:
23:region, also known as the
207:Ravenala madagascariensis
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223:Cathariostachys capitata
220:(guava), and the bamboo
160:Cryptocarya agathophylla
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368:Koechlin, Jean (1972).
324:Donque, Gerald (1972).
284:Lepilemur tymerlachsoni
31:region of northwestern
280:Nosy Be sportive lemur
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123:Trees of the families
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73:Ampasindava Peninsula
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41:dry deciduous forests
405:Chauvet, B. (1972).
296:Lokobe National Park
276:Microcebus mamiratra
202:shifting cultivation
71:in the north to the
272:Nosy Be mouse lemur
250:Several species of
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81:Tsaratanana Massif
61:
37:eastern Madagascar
465:978-94-015-7161-6
428:978-94-015-7161-6
391:978-94-015-7161-6
347:978-94-015-7161-6
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25:Sambirano domain
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268:Phaner parienti
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65:Sambirano River
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260:Eulemur macaco
244:Eulemur macaco
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125:Sarcolaenaceae
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191:Anacardiaceae
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175:Euphorbiaceae
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129:Myristicaceae
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29:biogeographic
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491:Diana Region
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298:on Nosy Be.
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290:Conservation
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131:, and genus
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77:Diana Region
62:
24:
20:
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256:black lemur
240:black lemur
187:Sapindaceae
69:Ifasy River
480:Categories
306:References
134:Anthostema
89:Nosy Komba
33:Madagascar
183:Rubiaceae
179:Arecaceae
170:Diospyros
165:Ebenaceae
149:Lauraceae
144:Cynometra
47:Geography
39:than the
21:Sambirano
139:Fabaceae
278:), and
238:Female
217:Psidium
105:Ambanja
95:Climate
85:Nosy Be
57:Nosy Be
27:, is a
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425:
388:
344:
212:citrus
198:savoka
189:, and
154:Ocotea
118:lianas
252:lemur
230:Fauna
112:Flora
460:ISBN
423:ISBN
386:ISBN
342:ISBN
157:and
127:and
87:and
19:The
452:doi
415:doi
378:doi
334:doi
286:).
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147:),
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