西双版纳热带雨林生态化学计量比与元素变化特征及其对环境响应研究

项目名称： 西双版纳热带雨林生态化学计量比与元素变化特征及其对环境响应研究

项目编号： No.41461015

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 天文学、地球科学

项目作者： 张文翔

作者单位： 云南师范大学

项目金额： 55万元

中文摘要： 全球变暖和极端气候事件的频发造成了西双版纳地区干旱程度增加，改变了热带雨林生态系统的气候特征与梯度效应。本项目以西双版纳热带季雨林与山地雨林为研究对象，结合研究区气象、水文观测资料和并结合样地条件控制试验，通过测定植物-凋谢物-土壤系统样品的生态化学计量比值和化学元素及相关指标，探讨热带雨林中植物-凋谢物-土壤系统生态化学计量比及化学元素在时空尺度上和水热梯度上的变化特征。在此基础上，利用多变量统计分析和探讨优势种植物系统生态化学计量比及化学元素对环境变化的响应，并尝试揭示我国西双版纳热带雨林物质循环机制。项目的完成可丰富和完善我国热带雨林生态环境变化研究的理论，为系统识别森林生态系统对全球变化胁迫的响应过程与适应机制，有效地对热带雨林生态系统进行保护和治理，提供一定的科学依据。

中文关键词： 西双版纳热带雨林；生态化学计量；地球化学元素；全球变化；环境响应

英文摘要： The drought degree of Xishuangbanna is caused by the global warming and frequent extreme meteorological events, and it changes the climate feature and gradient effect of tropical rainforest ecological system.Here we focus on the tropical rainforest of Xishuangbanna, and combine the field, the meteorological and hydrological data and control experiments in sampling plot. By measuring the ecological stoichiometry ratio and geochemical elements of vegetable-wither matter-soil system samples, we will discuss the variation characteristics of the ecological stoichiometry ratio and geochemical elements in spatial and temporal scales and water thermal gradient. On these bases, we analysize and discuss the response of the ecological stoichiometry ratio and geochemical elements of dominant species in the tropical rainforest ecosystem to environmental change through multivariate statistical analysis, and try to reveal the material cycle mechanism of Xishuangbanna tropical rainforest in our country. This project can be rich and perfect the theoretical study of ecological environment changes of tropical rainforest in our country. In addition, this research results can systematically identify the response process and acclimation mechanism of forest ecosystem to global change, and it will provide certain scientific basis for effective protection and control of tropical rainforest ecological system.

英文关键词： Xishuangbanna tropical rain forest;ecological stoichiometry ratio;geochemical elements;globe change;environmental response