Effects of simulated warming on plant community structure,productivity and soil physical and chemical characteristics of alpine meadow in northwest Sichuan Province
Taking the alpine meadow plant community in northwest Sichuan as the research object,the effects of five-year war-ming treatment on the alpine meadow community structure,productivity and soil physical and chemical characteristics were sim-ulated by using the open-top growth chamber(OTC).The present study found that the community height increased significantly by 69.80%after warming treatment,and the community richness index,diversity index and evenness index decreased signifi-cantly by24.81%,14.51%and3.7%respectively,but the community coverage and productivity did not change significantly after warming treatment.By analyzing the composition of functional groups in the community,it was found that the average height,coverage and important value of Grasses plants increased significantly by 89.26%,162.03%and89.47%respectively after warming.The average height and important value of Sedges plants increased significantly by 40.01%and 40.63%respec-tively,and the coverage did not change significantly.The average height of Forbs grass plants increased by 33.27%,but the cov-erage and important value decreased by 52.95%and 38%respectively.Correlation analysis showed that after warming treat-ment,the productivity of grasses plants was significantly positively correlated with community height,the productivity of forbs grasses was significantly negatively correlated with community height and soil available phosphorus,and was significantly posi-tively correlated with community richness,diversity,uniformity and soil pH.Therefore,this study showed that the five-year war-ming treatment had a significant effect on the community structure of alpine meadow in northwest Sichuan,but had no significant effect on community productivity and soil basic physical and chemical characteristics(except for pH).
warmingalpine meadowcommunity structuresoil physical and chemical factorproductivity
NETL
NSTL
万方数据
