Waterbirds as Bioindicators of Environmental Conditions
Waterbirds as Bioindicators of Environmental Conditions
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DOI：
10.1007/978-1-4020-9278-7_5
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发表时间：
2010-01-01
期刊：
影响因子：
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通讯作者：
Green, Andy J.
中科院分区：
文献类型：
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作者：
Amat, Juan A.;Green, Andy J.
我们给出的例子如何水鸟可以在水生系统的变化有价值的指标。富营养化是一个普遍存在的问题，可以增加某些鸟类的食物供应，从而增加它们的种群规模（例如大冠）。许多鸟类对水深的变化很敏感，有些鸟类会因为浅水湖泊的淤积（如红瘤顶鸡）或低降雨量导致临时湿地干涸（如大火烈鸟）而减少。水鸟群落的物种丰富度是一个不太可靠的指标，比一个给定的物种的趋势，并与其他水生群落的丰富度的关系很弱。除了指示条件的变化外，水鸟在达到高密度时也会引起它们，例如，当集群鸟类从其他地方输入营养物质时，或者当鹅引起过度放牧时。在使用水鸟作为指标时，必须对它们的生态有透彻的了解，并为监测计划制定明确的目标。
We give examples of how waterbirds can be valuable indicators of changes in aquatic systems. Eutrophication is a widespread problem that can increase the food supply for some birds and hence increase their population size (e.g. great-crested grebes). Many birds are sensitive to changes in water depth, and some can decline due to siltation of shallow lakes (e.g. red-knobbed coot) or when low rainfall leads temporary wetlands to dry out (e.g. greater flamingos). The species-richness of the waterbird community is a less reliable indicator than trends for a given species, and has a weak relationship with the richness of other aquatic communities. As well as indicating changes in conditions, waterbirds can also cause them when they reach high densities, e.g. when colonial birds import nutrients from elsewhere or when geese cause overgrazing. When using waterbirds as indicators, a thorough knowledge of their ecology and clear objectives for the monitoring programme are essential.