Collaborative Research: Structural and Functional Roles of Coarse Woody Debris in Tropical Stream-Riparian-Upslope Forest Ecosystems

[306758] Vogt本研究探讨了热带雨林河流、河岸和上游地区木材分解对生态系统过程的影响。对木质碎片的处理（去除和增加，以及木材的自然数量）将表明木材在植被生长、水生和陆地群落结构以及养分循环过程中的作用。对不同处理地块的碳和养分库、矿化和滞留、植物生长和群落组成进行测量和比较。这个为期五年的项目将表明木材继续影响生态系统过程的时间长度。对于生态系统对扰动后大量木屑输入的反应知之甚少，特别是在热带生态系统中。大型木屑分解相对缓慢，为各种生物提供基质和营养。因此，扰动后大量木本物质的输入可以在很长一段时间内显著影响生态系统过程。这项研究将表明在热带雨林的河流、河岸和上坡生态系统中，被操纵的木质碎片水平的影响程度。＊＊＊

9306758 Vogt This research addresses effects of wood decomposition on ecosystem processes in stream, riparian, and upslope locations in a tropical rainforest ecosystem. Manipulation of woody debris (removal and addition, as well as natural amounts of wood) will indicate the role of wood in vegetation growth, aquatic and terrestrial community structure, and nutrient cycling processes. Carbon and nutrient pools, mineralization and retention, plant growth, and community composition will be measured and compared among the treated plots. The five-year project will indicate the length of time wood continues to influence ecosystem processes. %%% Little is known about ecosystem responses to large inputs of woody debris following disturbances, especially in tropical ecosystems. Large woody debris decomposes relatively slowly and provides substrates and nutrients for a variety of organisms. Therefore, the large inputs of woody material following disturbances can influence ecosystem processes significantly over long time periods. This research will indicate the magnitude of effect of manipulated levels of woody debris in stream, riparian and upslope ecosystems in a tropical rainforest. ***