DISSERTATION RESEARCH: Will stream restoration enhance ecosystem resistance and resilience to storms?

论文研究：河流恢复会增强生态系统对风暴的抵抗力和复原力吗？

• 批准号: 0710264
• 负责人: Jennifer Tank
• 金额: $ 1.18万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-15 至 2009-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0710264&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Will; stream; restoration

Stream restoration efforts in the US have greatly increased in recent decades, but rigorous evaluations of their ecological impacts remain rare. One common stream restoration approach is reintroduction of large wood that has been systematically removed in association with forest logging. Large wood in streams creates habitat and retains food resources (i.e., organic matter) for stream food webs. To experimentally test if large wood addition increases organic matter retention following storms, organic matter inputs and outputs will be quantified in paired 100-meter reaches with and without added wood, in three restored streams. Whole-stream nutrient demand, which integrates the biological activity of stream microbes and algae, will be quantified as a response variable. Results will provide insight into long-term efficacy of wood addition as a stream restoration tool. Environmental disturbances (e.g. storms, fires, and droughts) play a significant role in structuring biological communities for time periods long after their occurrence. Therefore, as scientists and land managers implement ecosystem restoration strategies, it is critical that we understand how restoration will interact with environmental disturbance. Results from this study will assist private and public entities involved in stream restoration activities, in refining and improving their approaches, furthering the success of sustainable, long-lasting restoration strategies.

近几十年来，美国的河流恢复工作大大增加，但对其生态影响的严格评估仍然很少。一种常见的溪流恢复方法是重新引入因森林砍伐而被系统移除的大块木材。溪流中的大型木材创造了栖息地并保留了食物资源（即，有机物）的溪流食物网。 为了实验测试，如果大量的木材增加增加风暴后的有机物保留，有机物的输入和输出将量化在配对的100米达到与不添加木材，在三个恢复流。 整个流营养需求，其中集成了流微生物和藻类的生物活性，将被量化为一个响应变量。结果将提供洞察木材作为流恢复工具的长期功效。 环境扰动（如风暴、火灾和干旱）在其发生后很长一段时间内对生物群落的结构起着重要作用。 因此，随着科学家和土地管理者实施生态系统恢复战略，我们必须了解恢复如何与环境干扰相互作用。这项研究的结果将有助于私人和公共实体参与流恢复活动，在完善和改进他们的方法，促进可持续的，持久的恢复战略的成功。