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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Physical wetland characteristics influence amphibian community composition differently in constructed wetlands and natural wetlands
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Physical wetland characteristics influence amphibian community composition differently in constructed wetlands and natural wetlands

机译：物理湿地特征在人工湿地和自然湿地中对两栖动物群落组成的影响不同

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摘要

Wetlands provide critical habitat for a diverse group of organisms and provide important ecosystem services. Despite this, most natural wetlands have been lost to anthropogenic activities, and as a result, wetland construction is common mitigation practice. Therefore, examination of constructed wetland viability in replacing the function of lost wetlands is vital. Our primary objectives were to compare amphibian communities of shallow and deep constructed wetlands to natural wetlands and to identify which wetland characteristics affect species composition. All wetlands were hydrologically isolated and fishless; natural wetlands had an ephemeral hydrology, and constructed wetland hydrology varied from ephemeral to permanent. Overall, constructed wetlands did not sufficiently replicate natural wetlands with respect to the amphibian community. However, two of our constructed wetlands had a drying period and exhibited communities more similar to natural wetlands. Hydroperiod and canopy closure were indicators of amphibian community composition. Many species observed in natural wetlands were rare in shallow constructed and absent in deep constructed wetlands. Additionally, dominant predator species (primarily Lithobates catesbeianus, Litho bates clamitans, and Notophthalmus viridescens) associated with permanent water were more abundant in constructed wetlands. Water depth, pH, and emergent vegetation were lower in natural wetlands. These data influenced land managers to revise construction methods and to renovate deep constructed wetlands by creating gradual slopes, decreasing maximum depth to 20 cm or less, maintaining canopy cover, and decreasing soil compaction to attempt replication of natural wetland hydrology. (C) 2016 Elsevier B.V. All rights reserved.
机译：湿地为各种生物提供重要的栖息地，并提供重要的生态系统服务。尽管如此，大多数自然湿地已经丧失了人为活动，因此，湿地建设是常见的缓解措施。因此，检查人工湿地在替代失去的湿地功能方面的生存能力至关重要。我们的主要目标是将浅，深人工湿地的两栖动物群落与自然湿地进行比较，并确定哪些湿地特征会影响物种组成。所有湿地在水文上都是孤立无鱼的。天然湿地具有短暂的水文状况，人工湿地的水文学状况从短暂到永久不等。总体而言，就两栖动物而言，人工湿地不能充分复制自然湿地。但是，我们的两个人工湿地处于干旱期，其群落表现出与自然湿地更相似的特征。水周期和冠层封闭是两栖动物群落组成的指标。在天然湿地中观察到的许多物种在浅层人工湿地中很少见，而在深层人工湿地中却很少。此外，在人工湿地中，与永久性水有关的优势捕食性物种（主要是Cathosbeianus，Late clamitan和Litobates viridescens）更为丰富。自然湿地的水深，pH和萌生植被较低。这些数据影响了土地管理者，通过创建逐渐倾斜的坡度，将最大深度减小到20厘米或更小，保持冠层覆盖并减少土壤压实度来尝试复制自然湿地水文学，从而修改了建造方法并翻修了深层的人工湿地。 （C）2016 Elsevier B.V.保留所有权利。

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