...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Interactions between two introduced species: Zostera japonica (dwarf eelgrass) facilitates itself and reduces condition of Ruditapes philippinarum (Manila clam) on intertidal flats
【24h】

Interactions between two introduced species: Zostera japonica (dwarf eelgrass) facilitates itself and reduces condition of Ruditapes philippinarum (Manila clam) on intertidal flats

机译：引入的两个物种之间的相互作用：褐变带（Zostera japonica）可以促进自身生长并减少潮间带上的菲律宾蛤仔（马尼拉蛤）的状况

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

Dwarf eelgrass (duckgrass; Zostera japonica) and Manila clams (Ruditapes philippinarum) are two introduced species that co-occur on intertidal flats of the northeast Pacific. Through factorial manipulation of clam (0, 62.5, 125 clams m~(-2)) and eelgrass density (present, removed by hand, harrowed), we examined intra- and interspecific effects on performance, as well as modification of the physical environment. The presence of eelgrass reduced water flow by up to 40% and was also observed to retain water at low tide, which may ameliorate desiccation and explain why eelgrass grew faster in the presence of conspe-cifics (positive feedback). Although shell growth of small (20-50 mm) clams was not consistently affected by either treatment in this 2-month experiment, clam condition improved when eelgrass was removed. Reciprocally, clams at aquaculture densities had no effect on eelgrass growth, clam growth and condition, or porewater nutrients. Overall, only Z. japonica demonstrated strong population-level interactions. Interspecific results support an emerging paradigm that invasive marine ecosystem engineers often negatively affect infauna. Positive feedbacks for Z. japonica may characterize its intraspecific effects particularly at the stressful intertidal elevation of this study (+1 m above mean lower low water).
机译：矮小鳗gra（duckgrass； Zostera japonica）和马尼拉蛤（（Ruditapes philippinarum）是在东北太平洋潮间带上同时出现的两个引入物种。通过对蛤（0、62.5、125蛤m〜（-2））和鳗草密度（存在，用手去除，耙耙）的有因操作，我们研究了种内和种间对性能的影响以及对物理环境的改变。鳗草的存在减少了多达40％的水流量，并且还观察到了在退潮时仍能保持水分，这可能会改善干燥状况，并解释为什么在有特殊需要的情况下鳗草生长得更快（正反馈）。尽管在这个为期2个月的实验中，两种处理均未始终影响小蛤（20-50 mm）的壳长，但去除鳗，时，蛤的状况得到改善。相反，水产养殖密度下的蛤e对鳗growth的生长，蛤growth的生长和状况或孔隙水养分没有影响。总体而言，仅日本粳稻表现出较强的种群间相互作用。种间结果支持了一种新兴的范例，即入侵性海洋生态系统工程师通常会对动物疫情产生负面影响。粳稻的正反馈可能是其种内效应的特征，特别是在本研究的潮间压力高处（平均低水位以上+1 m）。

著录项

  • 来源
    《Marine biology》 |2010年第9期|P.1929-1936|共8页
  • 作者

    Chaochung Tsai; Sylvia Yang; Alan C. Trimble; Jennifer L. Ruesink;

  • 作者单位

    Department of Biology, University of Washington,Box 351800, Seattle, WA 98195-1800, USA Program on the Environment,University of Washington, Seattle, WA 98195, USA;

    rnDepartment of Biology, University of Washington,Box 351800, Seattle, WA 98195-1800, USA;

    rnDepartment of Biology, University of Washington,Box 351800, Seattle, WA 98195-1800, USA;

    Department of Biology, University of Washington,Box 351800, Seattle, WA 98195-1800, USA;

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

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