Species diversity,biomass,and their relationship in the mountainous areas of Beijing
The relationship between species diversity and ecosystem function is one of the key issues in ecological research.Biomass is an important modality of ecosystem function.This study investigated 151 forest plots in the mountainous areas of Beijing,in order to understand the species diversity,biomass,and their relationship of the temperate secondary forest communities in Beijing.The results showed that the investigated plants belong to 399 species under 228 genera and 91 families.The vertical structure of forest communities was clearly stratified,and the species diversity of different layers generally presented that tree layer was the lowest,while shrub layer and herb layer were relatively close.Among the 9 forest community types,the species richness of Populus davidiana,Juglans mandshurica,Betula dahurica and Larix principis-rupprechtii communities were relatively high,followed by the Betula platyphylla and Quercus mongolica communities.The Pinus tabuliformis,Quercus variabilis and Tilia mongolica communities were relatively low,with an average number of plant species under 29.The aboveground biomass of forest communities varied from 3.00～25.00kg/m2,with an average of 12.73kg/m2.The biomass density of coniferous forest was higher than that of broad-leaved forest,with a values of 15.92kg/m2 and 11.46kg/m2,respectively.The age structure of forests were mainly middle-aged forests,which have significant carbon sequestration potential in the future.Species diversity displayed a significantly negative correlation with biomass.However,the effect of species diversity on biomass mainly through their shared effects with species properties and environmental factors,and the independent effect of species diversity was quite weak.Because the relationship between species diversity and biomass can be strongly confounded by covarying biotic and abiotic factors,we suggest that the efffects of environmental factors,species properties and management practices on biomass should be comprehensively considered in future research.
species diversitybiomasstemperate secondary forestmountainous areas of Beijingplant community
万方数据
维普
