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首页> 外文期刊>Conservation Biology >Effects of Pond Draining on Biodiversity and Water Quality of Farm Ponds
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Effects of Pond Draining on Biodiversity and Water Quality of Farm Ponds

机译：池塘排水对农田池塘生物多样性和水质的影响

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摘要

Farm ponds have high conservation value because they contribute significantly to regional biodiversity and ecosystem services. In Japan pond draining is a traditional management method that is widely believed to improve water quality and eradicate invasive fish. In addition, fishing by means of pond draining has significant cultural value for local people, serving as a social event. However, there is a widespread belief that pond draining reduces freshwater biodiversity through the extirpation of aquatic animals, but scientific evaluation of the effectiveness of pond draining is lacking. We conducted a large-scale field study to evaluate the effects of pond draining on invasive animal control, water quality, and aquatic biodiversity relative to different pond-management practices, pond physicochemistry, and surrounding land use. The results of boosted regression-tree models and analyses of similarity showed that pond draining had little effect on invasive fish control, water quality, or aquatic biodiversity. Draining even facilitated the colonization of farm ponds by invasive red swamp crayfish (Procambarus clarkii), which in turn may have detrimental effects on the biodiversity and water quality of farm ponds. Our results highlight the need for reconsidering current pond management and developing management plans with respect to multifunctionality of such ponds.
机译：农场池塘具有很高的保护价值，因为它们对区域生物多样性和生态系统服务做出了重要贡献。在日本，池塘排水是一种传统的管理方法，被广泛认为可以改善水质并消除入侵鱼类。另外，通过池塘排水捕鱼对于当地人来说具有重要的文化价值，是一项社交活动。但是，人们普遍认为，池塘排泄会通过消灭水生动物而减少淡水生物多样性，但缺乏对池塘排泄效果的科学评估。我们进行了一项大规模的田间研究，以评估池塘排泄相对于不同的池塘管理实践，池塘物理化学和周围土地利用，对侵入性动物控制，水质和水生生物多样性的影响。增强的回归树模型的结果和相似性分析表明，池塘排水对入侵性鱼类控制，水质或水生生物多样性影响很小。排水甚至促进了侵入性红色沼泽小龙虾（Procambarus clarkii）对农田池塘的定殖，这反过来可能对农田池塘的生物多样性和水质产生不利影响。我们的结果表明，有必要重新考虑当前池塘的管理，并就此类池塘的多功能性制定管理计划。

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