Effects of anthropogenic disturbance on richness-dependent stability in Napahai plateau wetland  

作　　者：LI Wei TAN Rui WANG Juan DU Fan YANG YuMing 

机构地区：[1]Yunnan Academy of Biodiversity,Southwest Forestry University [2]Yunnan Academy of Forestry,Key Laboratory of the State Forestry Administration for Conservation of Yunnan Rare,Endangered &Endemic Plant,Key Laboratory of Yunnan Provincial for Forest Plant Cultivation and Utilization

出　　处：《Chinese Science Bulletin》2013年第33期4120-4125,共6页

基　　金：supported by National Natural Science Foundation of China and Yunnan Province (U0933601);National Basic Research Program of China (2010CB434807);the Middle Aged Academic and Technical Leader Project of Yunnan Province (2010CI016).

摘　　要：Unique plateau wetlands in China provide essential ecosystem functions and services and influence the health,environment and security of the downstream regions.In recent years,these plateau wetlands have experienced significant anthropogenic disturbance,but studies that evaluate the effects of such disturbance on ecological stability are rare.Our study tested how three typical types of human-related activities affect plant richness and ecological stability in Napahai plateau wetland,Shangri-La,China.The results showed that the anthropogenic disturbance had a direct effect on richness,and an indirect effect on stability mediated by richness.Anthropogenic disturbance did not alter the positive relationship between plant richness and community stability,and the stabilizing effect of richness could be explained by statistical averaging,overyielding effect,and component population stability.Our study complements previous studies that tested the richness-stability relationships in synthesized assemblages with richness specifically manipulated and studies that introduced mowing treatment to mimic real anthropogenic disturbance.The results further suggest that necessary steps,such as anthropogenic disturbance mitigation and plant richness conservation,are urgently required for maintaining healthy plateau wetlands and for sustaining their ecosystem functions and services.Unique plateau wetlands in China provide essential ecosystem functions and services and influence the health, environment and security of the downstream regions. In recent years, these plateau wetlands have experienced significant anthropogenic disturb- ance, but studies that evaluate the effects of such disturbance on ecological stability are rare. Our study tested how three typical types of human-related activities affect plant richness and ecological stability in Napahai plateau wetland, Shangri-La, China. The results showed that the anthropogenic disturbance bad a direct effect on richness, and an indirect effect on stability mediated by richness. Anthropogenic disturbance did not alter the positive relationship between plant richness and community stability, and the stabilizing effect of richness could be explained by statistical averaging, overyielding effect, and component population stabil-

关 键 词：稳定性影响 人为干扰 高原湿地 纳帕海 依赖性 生态系统功能 正相关关系 人体健康 

分 类 号：X171.1[环境科学与工程—环境科学]