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首页> 外文期刊>Marine biology >Spatial and temporal patterns of habitat use by Eurasian oystercatchers (Haematopus ostralegus) in the eastern Wadden Sea revealed using GPS data loggers
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Spatial and temporal patterns of habitat use by Eurasian oystercatchers (Haematopus ostralegus) in the eastern Wadden Sea revealed using GPS data loggers

机译：利用GPS数据记录仪揭示了东部瓦登海欧亚牡蛎（Haematopus ostralegus）栖息地的时空分布

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摘要

Detailed knowledge on species-habitat relationships is of crucial importance for the understanding of processes in marine ecosystems. Being top-predators, birds are important bio-indicators for marine systems. The aim of this study was to elucidate precise information on foraging habitat use and foraging times of oystercatchers {Haematopus ostralegus) on wide tidal flats using global positioning system (GPS) data loggers. The study was conducted to collect hints for the negative population trends in oystercatchers in the Wadden Sea. It is the first time that GPS technique has been used in a shorebird species. Although oystercatchers are known to exhibit foraging site fidelity, a number of individuals visited multiple sites. Foraging trips at night were longer, and the targeted sites were further away than those used during the day. These patterns were likely to be caused by higher risks of clutch predation by avian predators during the day that led adults to reduce their absence to defend their clutches. Our methodological approach enabled the subtle spatio-temporal patterns of habitat use to be determined on a very fine spatio-temporal scale. We suggest further potential studies using GPS data loggers that may help to reveal the reasons for the current declines in oystercatcher populations in the German Wadden Sea.
机译：关于物种－栖息地关系的详细知识对于理解海洋生态系统的过程至关重要。作为顶级掠食者，鸟类是海洋系统的重要生物指标。这项研究的目的是使用全球定位系统（GPS）数据记录仪，阐明有关在宽潮滩上的牡蛎捕食者（Haematopus ostralegus）的觅食栖息地使用和觅食时间的精确信息。进行该研究旨在收集瓦登海牡蛎捕捞者的负种群趋势提示。 GPS技术首次被用于水鸟物种。尽管已知牡蛎捕捞者表现出觅食地点的忠诚度，但仍有许多人参观了多个地点。夜间的觅食行程更长，目标地点比白天使用的地点更远。这些模式可能是由于鸟类掠食者在白天抓捕离合器的风险较高，导致成年人减少了保卫离合器的缺席。我们的方法论方法使得可以在非常精细的时空尺度上确定栖息地使用的细微时空格局。我们建议使用GPS数据记录仪进行进一步的潜在研究，这可能有助于揭示导致德国瓦登海牡蛎捕捞者数量下降的原因。

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  • 来源
    《Marine biology》 |2011年第3期|p.541-550|共10页
  • 作者

    Philipp Schwemmer; Stefan Garthe;

  • 作者单位

    Research and Technology Centre (FTZ),University of Kiel, Hafentorn 1, 25761 Biisum, Germany;

    Research and Technology Centre (FTZ),University of Kiel, Hafentorn 1, 25761 Biisum, Germany;

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