...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Habitat change by the formation of alien Crassostrea-reefs in the Wadden Sea and its role as feeding sites for waterbirds
【24h】

Habitat change by the formation of alien Crassostrea-reefs in the Wadden Sea and its role as feeding sites for waterbirds

机译：在瓦登海形成外来Crassostrea礁的栖息地变化及其作为水鸟饲养场所的作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Non-indigenous Pacific oysters (Crassostrea gigas) have been invading the central Wadden Sea since 1998, predominantly settling on intertidal blue mussel (Mytilus edulis) beds which are increasingly transformed into Crassostrea-reefs. Pacific oysters are strong ecosystem engineers and the habitat change is considered to be a threat for waterbirds losing important feeding sites in the intertidal of the Wadden Sea. This study has increased our understanding of the use of foraging habitats by birds according to changing food resources. During the spring and autumn migration period in 2007, we recorded bird densities at two reef types varying in Pacific oyster density and at the adjacent sand flat as a reference site. We also recorded feeding behaviour, choice of prey and assessed peck and intake rate of three target species: Eurasian oyster catcher Haematopus ostralegus, Eurasian curlew Numenius arquata and European herring gull Larus argentatus. To evaluate the use of the Crassostrea-reef in the central Wadden Sea, we compared bird densities of the target species at different intertidal feeding habitats in various regions and compared the biomass intake of Eurasian oystercatcher feeding on different prey species. We show that Eurasian oystercatcher and Eurasian curlew have adapted to the new situation and learned to exploit the food supply offered by Crassostrea-reefs. While foraging mainly on Pacific oysters, Eurasian oystercatchers attained sustainable intake rates even though food resource at dense reef during autumn was very poor due to a lack in harvestable oysters. Consolidation of reefs limits the accessibility of prey for Eurasian oystercatchers whereas a successful recruitment of Pacific oysters enhances the suitability of the habitat. Eurasian curlew was promoted by the engineering effects of the Pacific oyster while feeding extensively on shore crabs at the reefs. In contrast, European herring gulls appear hampered in foraging during low tide and hereby negatively affected by the habitat change from Mytilus-beds to Crassostrea-reefs.
机译：自1998年以来，非土著太平洋牡蛎（Crassostrea gigas）一直入侵瓦登海中部，主要定居在潮间蓝贻贝（Mytilus edulis）床上，这些床逐渐转变成Crassostrea礁。太平洋牡蛎是强大的生态系统工程师，栖息地的变化被认为是瓦登海潮间带水鸟失去重要觅食地点的威胁。这项研究增加了我们对不断变化的食物资源对鸟类利用觅食生境的了解。在2007年春季和秋季的迁徙期间，我们记录了太平洋牡蛎密度不同的两种礁石类型和邻近的沙地上的鸟类密度作为参考点。我们还记录了三种目标物种的进食行为，猎物的选择以及啄食和评估的进食率：欧亚牡蛎捕捞者Haematopus ostralegus，欧亚弯腰Numenius arquata和欧洲鲱鸥Larus argentatus。为了评估Crassostrea礁在瓦登海中部的使用，我们比较了各个地区不同潮间带摄食生境中目标物种的鸟类密度，并比较了以不同猎物物种为食的欧亚蛎cat的生物量摄入。我们表明，欧亚蛎cat和欧亚弯腰已经适应了新形势，并学会了利用Crassostrea礁提供的食物供应。尽管主要是在太平洋牡蛎上觅食，但由于缺乏可收获的牡蛎，即使秋天秋天在茂密的礁石上的食物资源非常贫乏，欧亚的牡蛎捕捞者仍取得了可持续的摄入量。珊瑚礁的合并限制了欧亚牡蛎捕捞者的猎物可及性，而成功地捕捞太平洋牡蛎则增强了栖息地的适宜性。太平洋牡蛎的工程效应促进了欧亚curl的生长，同时以珊瑚礁上的岸蟹为食。相比之下，欧洲鲱鸥在退潮期间似乎阻碍了觅食，因此受到栖息地从Mytilus床到Crassostrea礁的变化的负面影响。

著录项

  • 来源
    《Estuarine Coastal and Shelf Science》 |2013年第10期|41-51|共11页
  • 作者

    Alexandra Markert; Wiebke Esser; Dietrich Frank; Achim Wehrmann; Klaus-Michael Exo;

  • 作者单位

    Senckenberg am Meer, Marine Research Department, Suedstrand 40, 26382 Wilhelmshaven, Germany,Biodiversity and Climate Research Centre, Senckenberganlage 25, 60325 Frankfurt, Germany;

    Senckenberg am Meer, Marine Research Department, Suedstrand 40, 26382 Wilhelmshaven, Germany,Institute of Avian Research, 'Vogelwarte Helgoland', An der Vogelwarte 21, 26386 Wilhelmshaven, Germany;

    Wadden Sea National Park Administration of Lower Saxony, Virchowstrasse 1, 26382 Wilhelmshaven, Germany;

    Senckenberg am Meer, Marine Research Department, Suedstrand 40, 26382 Wilhelmshaven, Germany,Biodiversity and Climate Research Centre, Senckenberganlage 25, 60325 Frankfurt, Germany;

    Institute of Avian Research, 'Vogelwarte Helgoland', An der Vogelwarte 21, 26386 Wilhelmshaven, Germany;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pacific oyster; ecosystem engineering; foraging behaviour; waders; oystercatcher; North Sea;

    机译：太平洋牡蛎;生态系统工程;觅食行为;涉水牡蛎捕手北海;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号