ABSTRACT

is general agreement that biodiversity in Yemen is under threat due to mechanized rain-fed agricultural expansion, urban expansion, wood logging and overgrazing. For all these reasons, this study finds it urgent to provide this ecological assessment for the plant diversity and vegetation conservation in Taiz. The floristic composition and habitat information were recorded in 150 sample sites. The description of the floristic composition and diversity patterns of the study area was achieved by using of a range of species richness and abundance methods as well as diversity indices. The study area of West Taiz contains about 252 species (about 168 species per hectare) belonging to 57 families, with 12 dominant species (5 %), 5 endemic species, 14 near endemic species and 17 rare species. The investigated areasare estimated 1.5 ha, which corresponds to 150 samples X 100 m² sample sites. The largest families in terms of species in the study sites arePoaceae (Graminea) with 25 species, Euphorbiaceaewith 20 species, Apocynaceae with18 species, Acanthaceae with18 species, Fabaceae (Papilionoideae) with 12 species andMimosaceae with 11 species. The occurrence of species in different landforms of the study area shows a characteristic pattern: the total richness of 186 for mountains, 171 for hills, 155 for wadis and 118 for plains. Keywords: Floristic composition, Species diversity, Vegetation, Taiz, Yemen

https://ijbpas.com/pdf/2018/April/MS_IJBPAS_2018_4419.pdf

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