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首页> 外文期刊>Waterbirds >Effects of Water Depth, Cover and Food Resources on Habitat Use of Marsh Birds and Waterfowl in Boreal Wetlands of Manitoba, Canada
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Effects of Water Depth, Cover and Food Resources on Habitat Use of Marsh Birds and Waterfowl in Boreal Wetlands of Manitoba, Canada

机译：水深，覆盖度和食物资源对加拿大曼尼托巴省北方湿地沼泽鸟类和水禽栖息地利用的影响

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摘要

To evaluate water-level manipulations as a management tool in boreal wetlands, marsh bird and waterfowl habitat use were studied in the Saskatchewan River Delta, Manitoba, Canada, during 2008 and 2009. Call-response and aerial surveys were used to estimate densities of marsh birds and waterfowl, respectively, within six wetland basins undergoing two different water-level treatments. Generalized linear models were used to determine relationships between presence and densities of birds to water depth,vegetation characteristics, and relative forage fish and invertebrate abundances at two spatial scales. American Bittern (Botaurus lentiginosus) and Pied-billed Grebe (Podilymbus podiceps) densities were positively influenced by water depth and relativefish abundance. American Coots (Fulica americana) and diver waterfowl (Aythya, Bucephala) also responded positively to increased water depth, whereas dabbler waterfowl (Anas, Aix) were negatively influenced by increasing water depth. Densities of Sora (Porzana Carolina) and Virginia Rail (Rallus limicola) were positively correlated with the relative abundances of invertebrates, but negatively correlated with relative fish abundance. Due to the high avian biodiversity in the region, managers should focuson providing a variety of wetland habitats. Using a combination of partial water-level drawdowns and high water, habitatfor numerous avian species can be created simultaneously within wetland complexes.
机译：为了评估水位操纵作为北方湿地的一种管理工具，在2008年至2009年期间，在加拿大马尼托巴省的萨斯喀彻温河三角洲研究了沼泽鸟和水禽栖息地的使用。电话响应和空中调查用于估算沼泽的密度六个湿地盆地中的鸟类和水禽分别接受了两种不同的水位处理。使用广义线性模型来确定鸟类的存在和密度与水深，植被特征以及相对饲料鱼和无脊椎动物的丰度在两个空间尺度上的关系。美洲Bit（Botaurus lentiginosus）和斑嘴格里布（Podilymbus podiceps）密度受到水深和相对鱼类丰度的积极影响。美国白骨（Fulica americana）和潜水员水禽（Aythya，Bucephala）对水深的增加也有积极的反应，而涉水者水禽（Anas，Aix）则受到水深增加的负面影响。 Sora（波萨纳卡罗来纳州）和Virginia Rail（Rallus limicola）的密度与无脊椎动物的相对丰度呈正相关，但与鱼类的相对丰度呈负相关。由于该地区鸟类生物多样性高，管理人员应集中精力提供各种湿地栖息地。结合局部水位下降和高水位，可以在湿地综合体中同时为众多鸟类提供栖息地。

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