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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Stream habitat provided by large wood at risk under drainage law
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Stream habitat provided by large wood at risk under drainage law

机译：溪流栖息地由大型木材提供的风险在排水法下

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摘要

Watershed management efforts in agriculturally dominated landscapes of North America face nearly two centuries of laws and policies that encouraged habitat destruction. Although streams and wetlands in these landscapes are actively being restored using designs that incorporate science and engineering, watershed drainage laws can constrain action or impact passively restored or naturalized habitat. In general, drainage laws require removal of any riparian vegetation or wood deemed to obstruct flow in streams regulated as drains. We use a case study from Indiana (USA) to introduce the shortcomings of drainage laws for allowing large wood, which is an important habitat feature, to remain in stream ecosystems. Removals of large wood from monitored stream reaches in a regulated drain were associated with subsequent declines in fish biomass. Such legal activities represent an important environmental management problem that exists under drainage laws which apply to streams over a widespread geographic region of North America. Recent litigation in Wisconsin (USA) suggests that if state legislatures fail to update these antiquated laws, the courts may act in favour of science-based management of drains. The statutes and regulations that govern agricultural drainage warrant careful consideration if streams within drainage districts are to be managed to improve ecological function. (c) 2020 John Wiley & Sons, Ltd.
机译：流域管理在农业主导地区北美景观的努力面临近两个世纪的法律和政策，鼓励栖息地破坏。虽然这些景观中的溪流和湿地正在积极地使用包含科学和工程的设计来恢复，但流域排水法可以限制行动或影响被动恢复或归化的栖息地。通常，排水法需要去除被认为阻塞作为排水管的流中的流动的任何河岸植被或木材。我们使用印第安纳州（美国）的案例研究来介绍排水法的缺点，以允许大型木材，这是一个重要的栖息地特征，留在流生态系统中。从受监测的流中去除大型木材在受监管的流失中达到与鱼生物质的后续下降相关。此类法律活动代表了一个重要的环境管理问题，这些问题存在于北美广泛地区地区的流动中。威斯康星州（美国）最近的诉讼表明，如果州立立法机构未能更新这些陈旧的法律，法院可能会支持基于科学的漏洞管理。如果要设法排水区内的溪流以改善生态功能，则控制农业资助的法规和法规谨慎考虑。 （c）2020 John Wiley＆Sons，Ltd。

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