• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Sensitivity of a fish time-series analysis to guild construction: a case study of the Mullica River-Great Bay ecosystem
【24h】

Sensitivity of a fish time-series analysis to guild construction: a case study of the Mullica River-Great Bay ecosystem

机译：鱼的时间序列分析对行会建设的敏感性：以穆利卡河-大湾生态系统为例

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

Guilds are defined as polyphyletic species groups delineated by specific attributes selected by the organizer. Functional guilds combine species on the basis of niches and ecological roles, whereas structural guilds combine species based on the use of a particular resource. Guilds can be substituted for individual species in an analysis, allowing for insight based on ecological questions with reduced variance from taxonomic differences. In this case study, we examined guilds of fishes over decades based on reproductive characteristics, and again on origin relative to the system, in an estuary in southern New Jersey, USA. These guilds were used in principal components analyses of the recruitment to an estuary of groups of fishes based on spawning origin or life history characteristics. In both cases, use of the guilds resulted in more explained variation than did use of a full species assemblage. Both 8-class and 12-class reproductive guild clusters explained more than 50% of the total variance on the first 2 eigenaxes while displaying similar trends across time in comparison with the full species assemblage. Use of an abundance-based species assemblage also resulted in more explained variation than use of the full species assemblage. Overall, reproductive guilds more accurately reflected assemblage changes within the Mullica River-Great Bay ecosystem than origin guilds. Rare species did not contribute to a long-term change in assemblage. The sensitivity of results to guild construction might differ for estuaries that are at the margins of their respective oceanographic province.
机译：行会被定义为由组织者选择的特定属性所描述的多系种群。功能性公会根据生态位和生态作用来组合物种，而结构性公会则根据特定资源的使用来组合物种。在分析中，行会可以代替单个物种，从而可以根据生态学问题提供见解，而分类学差异却可以减少变化。在本案例研究中，我们在美国新泽西州南部的一个河口中，根据繁殖特征以及相对于系统的起源，对鱼类行会进行了数十年的研究。这些协会用于基于产卵源或生活史特征的鱼类群的河口募集的主要成分分析。在这两种情况下，使用公会都比使用完整的物种组合产生更多的解释变异。 8类和12类生殖行会集群都解释了前2个本征轴的总方差的50％以上，而与整个物种组合相比，在整个时间上显示出相似的趋势。与使用完整的物种组合相比，使用基于丰度的物种组合还导致了更多的解释变异。总体而言，生殖协会比起源协会更准确地反映了穆利卡河-大湾生态系统内的组合变化。稀有物种不会对组合的长期变化做出贡献。对于处于各自海洋学省边缘的河口，结果对行会建设的敏感性可能有所不同。

著录项

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