Name:
Western Amazon Floodplain Forest Macrogroup
Reference:
NatureServe Biotics 2019
Description:
This macrogroup includes seasonal varzea forest and igapo forest of the whitewater and black- and clearwater rivers of the western Amazon in Colombia, Ecuador, Peru and in Brazil, westward from the Jurua River. Whitewater flooding forests (varzea) are subject to ample annual river level fluctuations and are flooded from 3 to 5 months a year depending on their location, with topographic depressions permanently saturated. Characteristic species of tall trees are <i>Ceiba pentandra, Vochysia venulosa, Ficus insipida, Calycophyllum spruceanum, Terminalia oblonga, Sterculia apetala, Guarea guidonia, Guarea macrophylla, Perebea guianensis, Chimarrhis glabriflora, Celtis schippii, Zygia juruana, Mouriri grandiflora, Parkia inundabilis</i>, and <i>Piptadenia pteroclada</i>. Blackwater flooding forests (igapo) develop on flat to slightly depressed floodplains with a meandering drainage system and mainly white sand soils, with high concentrations of tannic substances and humic acids from the decomposition of the organic material lining the soils. In general they have lower stature, are less dense and less species-rich than the varzea forests. Communities are differentiated by their proximity to the river, the lower ones flooded up to eight months a year and the more distal ones, up to five months in water 5 m deep. Prominent species are <i>Eugenia inundata, Senefeldera inclinata, Hevea guianensis, Hevea brasiliensis, Eschweilera coriacea, Couratari oligantha, Macrolobium acaciifolium, Maquira coriacea, Maquira guianensis, Coussapoa trinervia, Matayba inelegans</i>, and <i>Matayba macrocarpa</i>.
Accession Code:
urn:lsid:vegbank.org:commConcept:40886-{795E1EA3-BC72-4472-ACC4-C46AC4646CD6}
Plot-observations of this Community Concept:
0
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