Community vertical stratification drives temporal taxonomic and phylogenetic beta diversity in a mixed broadleaf-conifer forest

Temporal change of beta diversity provides a better understanding the extent and consequences species composition in forest communities with ongoing global climate change. However, relatively little is known about temporal changes across vertical stratification forest. In this study, we divided more than 5,000 tree individuals from mixed broadleaf-conifer into four strata (i.e., shrub, subcanopy, lower canopy, upper canopy) to quantify how drives taxonomic phylogenetic diversity. We found that significantly decreased while showed an insignificant increase after 5 years. When considering stratification, canopy changed inconsistent directions, but shrub increased. Moreover, significant decrease mainly driven by subcanopy (with 85.89% contributions). The are shifts 96.02% Our study suggests taking community consideration contributes communities.