Bird diversity in semi-humid evergreen broad-leaved forest patches on the central Yunnan Plateau,South-west China
We assessed the diversity,composition,and distribution of bird species in patches of semi-humid ever-green broad-leaved forest by selecting eight natural forest communities in the central Yunnan Plateau,which is a representative distribution area of semi-humid broad-leaved evergreen forest.Field observations were conducted from April to August 2023 by the sample line and sample point method,and eight survey routes of 3-4 km in length were established.The results showed that 1)A total of 1286 birds were recorded,belonging to 102 species in 7 or-ders and 30 families.The three most abundant families were Muscicapidae(14 species),Leiothrichidae(9 spe-cies),and Phylloscopidae(7 species);2)Species of Oriental origin,Palaearctic origin,and widespread species accounted for 81.4％ ,4.9％ ,and 13.7％ of observations,respectively;3)The average number of bird species sur-veyed in forest patches was 32.0±3.5;the Shannon index of birds was lower in secondary,semi-humid evergreen broad-leaved forests(1.536±0.110)than in primary forest communities(2.037±0.100);4)Species composition exhibited considerable variation between patches,with the presence of dominant and common species,and the difference in rare species;5)Considering the ecological groups of birds based on diet,invertebrate-eating and om-nivorous birds,herbivorous birds,and carnivorous birds accounted for 84.3％ ,11.8％ ,and 3.9％ ,respectively.The coexistence of birds with similar diets was maintained by diluting interspecific competition,mainly through par-titioning of the vertical feeding space.For the conservation of bird species diversity and rare species,all patches of native semi-humid evergreen broad-leaved forest are of conservation value.
万方数据
维普
