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首页> 外文期刊>Natural Hazards >Population changes of urban land birds in the three years following theTI Population changes of urban land birds in the three years following the hurricane Katrina flood
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Population changes of urban land birds in the three years following theTI Population changes of urban land birds in the three years following the hurricane Katrina flood

机译：TI飓风过后三年中城市陆鸟的种群变化卡特里娜飓风后的三年中城市陆鸟的种群变化

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摘要

There are few studies of wildlife population dynamics in the wake of natural disasters, and little is known about "normal" rates and trajectories of their recovery. I document the population trajectories of ten urban resident land bird species in New Orleans, USA, over a 30 km network of survey transects in the 3.4 years following the Hurricane Katrina flood of September 2005 and compare them to transects surveyed before the storm in 1994-2000. The avian community in January 2009 differed from that before the storm, chiefly in the increased dominance of European Starlings (Sturnus vulgaris) and the near disappearance of the formerly common Northern Cardinal (Cardinalis cardinalis), Common Grackle (Quiscalis quiscula), and Bronzed Cowbird (Molothrus aeneus; at least through August 2007). In total, resident populations after 3.4 years were at less than half the levels recorded before the storm, having increased only weakly from their post-storm lows. Individual species varied widely in their population changes over the 3 years that followed their initial declines, some declining farther and others increasing by more than threefold. Starlings regained the highest proportion of their pre-storm numbers. The first and probably the second nesting seasons after the storm both saw resident bird populations increase substantially, but then decline again markedly by mid-winter.
机译：关于自然灾害后野生动植物种群动态的研究很少，对“正常”速率及其恢复轨迹知之甚少。我记录了在2005年9月的卡特里娜飓风之后的3.4年内，在30公里的调查样带网络上，美国新奥尔良的10种城市居民陆上鸟类物种的种群轨迹，并将它们与1994年飓风来临之前进行调查的样带进行了比较， 2000。 2009年1月的鸟类群落与暴风雨前有所不同，主要是欧洲Star鸟（Sturnus vulgaris）的优势日益增强，以及以前常见的北部红衣主教（Cardinalis cardinalis），Common Grackle（Quiscalis quiscula）和古铜色Cowbird的消失（Molothrus aeneus;至少到2007年8月为止）。总体而言，3.4年后的常住人口不到暴风雨前记录的一半，仅比暴风雨后的低点略有增加。在最初的下降之后的三年中，各个物种的种群变化差异很大，其中一些下降得更多，而另一些则增长了三倍以上。鸟重新获得了暴风雨前的最高比例。风暴过后的第一个和第二个筑巢季节都看到常驻鸟类数量大幅增加，但到冬季中期又明显下降。

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