Preliminary study on factors driving arbuscular mycorrhizal fungi diversity with elevation in the South-Tibet River Basin
Arbuscular mycorrhizal fungi(AMF)play a vital role in maintaining the functionality and stability of plateau wetland ecosystems.However,the diversity of AMF communities along elevational gradients and their response to construction processes in the South-Tibet River Basin remain unclear.In this study,we conduc-ted a wetland plant community survey,measured the physicochemical properties of water in situ,and collec-ted sediment samples for further analysis across a high elevational gradient(4 200 to 5 100 m)in the South-Tibet River Basin.Results revealed that Glomus was the dominant genus within the Qinghai-Tibet Plateau wetland ecosystem.However,its relative abundance varied greatly with elevation,showing a significant de-clining trend with increasing elevation.Differences in AMF community composition were primarily due to species replacement.Variance partitioning analysis showed that the contribution of environmental variables to the AMF diversity-elevation patterns mainly involved sediment and water factors,with a lesser contribution from plant factors.These findings suggest that the establishment of the AMF community in the wetland habi-tat of the South-Tibet River Basin is predominantly governed by deterministic processes at high elevational gradients,reflecting a unique model of AMF community construction in the Qinghai-Tibet Plateau.However,further validation of these results is warranted.
NETL
NSTL
万方数据
维普
