Global Seabird Response to Forage Fish Depletion-One-Third for the Birds
Global Seabird Response to Forage Fish Depletion-One-Third for the Birds
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DOI：
10.1126/science.1212928
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发表时间：
2011-12-23
期刊：
影响因子：
56.9
通讯作者：
Sydeman, William J.
中科院分区：
文献类型：
--
作者：
Cury, Philippe M.;Boyd, Ian L.;Sydeman, William J.
确定关键的捕食者-猎物关系的形式对于理解海洋生态系统动力学至关重要。利用一个全面的全球数据库，我们量化了食物丰富度波动对海鸟繁殖成功的影响。我们确定了一个阈值的猎物（鱼和磷虾，被称为“饲料鱼”）丰度低于海鸟的经验不断减少和更可变的生产力。这种反应是共同的所有七个生态系统和14个鸟类物种在大西洋，太平洋和南大洋。阈值约为长期研究中观察到的最大猎物生物量的三分之一。这提供了一个指标，说明长期维持海鸟生产力所需的最低饲料鱼类生物量。
Determining the form of key predator-prey relationships is critical for understanding marine ecosystem dynamics. Using a comprehensive global database, we quantified the effect of fluctuations in food abundance on seabird breeding success. We identified a threshold in prey (fish and krill, termed "forage fish") abundance below which seabirds experience consistently reduced and more variable productivity. This response was common to all seven ecosystems and 14 bird species examined within the Atlantic, Pacific, and Southern Oceans. The threshold approximated one-third of the maximum prey biomass observed in long-term studies. This provides an indicator of the minimal forage fish biomass needed to sustain seabird productivity over the long term.