Habitat Use by Migrant Shorebirds in Saline Lakes of the Southern Great Plains
Habitat Use by Migrant Shorebirds in Saline Lakes of the Southern Great Plains
复制标题
南部大平原盐湖中迁徙滨鸟的栖息地利用
DOI：
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发表时间：
2008
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影响因子：
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通讯作者：
J. Surles
中科院分区：
文献类型：
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作者：
Adrian E. Andrei;Loren M. Smith;D. Haukos;J. Surles
摘要通过北美大平原南部迁徙的滨鸟以盐湖为中途停留地，以休息和补充能量储备。为了了解无脊椎动物、盐度、淡水泉、植被和水的可用性如何影响盐湖作为迁徙中转站的价值，我们比较了候鸟使用和不使用的湖泊。滨鸟使用的湖泊有淡水泉、泥滩和死水，植被稀疏(≤覆盖率为1%)，中低盐度(̄=30.87g/L)，平均无脊椎动物生物量为0.79g/m2。未利用的湖泊一般干燥或有高咸水(̄=82.56g/L)，缺乏流动的泉水和植被，很少或没有无脊椎动物(̄=0.007 g/m2)。我们的结果表明，春季流量的减少和盐度的增加对滨鸟栖息地和水生无脊椎动物的可用性产生了负面影响。我们建议保存在盐湖中排放的淡水泉水。因为泉水是从奥加拉拉含水层排出的，而奥加拉拉含水层是通过普拉亚湿地补给的，所以大平原和奥加拉拉含水层的整个湿地复合体应该作为一个完整的系统进行管理。
Abstract Shorebirds migrating through the Southern Great Plains of North America use saline lakes as stopovers to rest and replenish energy reserves. To understand how availability of invertebrates, salinity, freshwater springs, vegetation, and water influence the value of saline lakes as migration stopovers, we compared lakes used and not used by migrant shorebirds. Shorebirds used lakes that had freshwater springs, mudflats and standing water, sparse vegetation (≤1% cover), low to moderate salinities (?̄ = 30.87 g/L), and mean invertebrate biomass of 0.79 g/m2. Lakes that were not used were generally dry or had hypersaline water (?̄ = 82.56 g/L), lacked flowing springs and vegetation, and had few or no invertebrates (?̄ = 0.007 g/m2). Our results suggest that reduced spring flows and increased salinity negatively affect availability of shorebird habitats and aquatic invertebrates. We recommend preservation of the freshwater springs discharging in the saline lakes. Because the springs are discharged from the Ogallala aquifer, which is recharged through the playa wetlands, the entire complex of wetlands in the Great Plains and the Ogallala aquifer should be managed as an integral system.