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Mechanism of ecological degradation of mountain ecosystem in the upper reaches of the minjiang river: effects of keystone populations
Authors
乔永康
刘庆
+5 more
包维楷
吴宁
曾宗永
潘开文
王跃招
Publication date
1 May 2002
Publisher
Abstract
岷江上游地区在我国长江上游高山峡谷区具有代表性,由于近几十年来人为活动加剧,该区生态系统严重退化。简要介绍了岷江上游山地生态系统的概况,讨论了关键种群在退化生态系统研究中的作用和意义。在此基础上进一步认为,岷江上游山地生态系统退化机理研究应以典型的干旱河谷灌丛、亚高山森林和亚高山草甸等主要生态系统为对象,以关键种群为核心和切入点,重点研究干旱河谷示植物种群动态及其与环境退化的关系、主要动植物种群变化在草地生态系统退化过程中的作用、亚高山关键种苗木定居及退化环境的生理生态适应机制、土壤生物区系变化及其对系统中氮素归还的影响等,进而有助于在理论上阐述关键种群的生态功能,探讨关键种群变化导致生态系统退化的作用机理;在实践上为目前国家实施西部大开发生态环境建设的重大需求提供理论依据,推动恢复生态学的发展和该区域的生态建设
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Last time updated on 31/03/2020