| 摘要 |
[Objectives] To explore the phylogenetic diversity of wetlands at the source of the Qin River and provide data reference for future research. [Methods] Taking survey data (July, 2016) of plants in wetlands at the source of Qin River as research object, this study utilizes Phylocom 4.2 to construct plant (in wetlands at the source of Qin River) genealogical tree for 72 non-angiosperm species within research area, besides, the paper adopts Pedigree diversity index (PD), community pedigree structure index (net Relatedness index, NRI and Nearest Taxon Index, NTI) to analyze pedigree diversity and pedigree structure of plants in wetlands at the source of Qin River. This paper is going to explain the scientific question: pedigree diversity, pedigree β diversity, and pedigree structure of plants in wetlands at the source of Qin River, in order to study on relatedness and stability of community. [Results] The effect of habitat filtration will result in similar species adaptation and close genetic relationships in the community, manifesting as genealogy aggregation. On the contrary, the effect of competitive exclusion can lead to distant species’ genetic relationships in the community, manifesting as genealogy divergence. In this study, there was a tendency of aggregation among the species in sample plot S5, which indicated that the effect of habitat filtration was dominant in this plot, and in S2 and S6 the species had a decentralized trend. The NRI and NTI values in other plots were different in the positive and negative. [Conclusions] This research serves as an initial exploration of the phylogenetic diversity and community assembly mechanisms in the wetlands at the source of Qin River. Further studies incorporating environmental factors and human activities could provide deeper insights into community ecology phenomena and assembly mechanisms. |
