...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Archiv fur Hydrobiologie >The contribution of subsurface invertebrates to benthic density and biomass in a gravel stream
【24h】

The contribution of subsurface invertebrates to benthic density and biomass in a gravel stream

机译：地下无脊椎动物对砾石流底栖密度和生物量的贡献

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

The interstitial sediments of streams and rivers, the 'hyporheic zone', have a diverse and numerous fauna though the relative contribution of the subsurface and surface assemblages to total productivity remains poorly understood. Our main aim was to determine the contribution of hyporheic invertebrates to overall, reach-scale estimates of density and biomass in an acidic, first order stream in south-east England. We estimated metazoan density across a wide range of body sizes (meiofauna [>42mum to <500mum] and macrofauna [>500mum]) over time. A comparison with the assemblage from the streambed surface indicated that surface samples (0 - 5 cm) alone potentially underestimate annual, reach-scale estimates of density and biomass by factors of 2.2 and 2.8, respectively. An invertebrate assemblage of relatively few, large individuals near the surface was replaced by a suite of numerous but small-bodied organisms in the deeper sediments. Although abundances peaked at different depths in the sediments, most taxa were found throughout the profile. The assemblage of numerous, small-bodied invertebrates in the interstices at this stream may contribute substantially towards overall benthic production.
机译：尽管对地下和地表组合对总生产力的相对贡献还知之甚少，但河流和河流的间隙沉积物（“ hypohephic zone”）具有多种多样的动物群。我们的主要目的是确定低脂无脊椎动物对英格兰东南部酸性一阶水流中密度和生物量整体，范围尺度估计的贡献。我们估算了随时间变化的各种体形（meiofauna [> 42mum至<500mum]和大型动物[> 500mum]）的后生动物密度。与流床表面组合的比较表明，单独的表面样本（0-5 cm）可能分别低估密度和生物量的年度，达到规模的估计，分别为2.2和2.8倍。地表附近相对较少的大型个体的无脊椎动物集合被更深的沉积物中的一系列众多但小型的生物所取代。尽管沉积物的丰度在不同深度处达到峰值，但在整个剖面中发现了大多数分类单元。在这条小溪的空隙中，无数小体无脊椎动物的聚集可能对整个底栖动物的生产有很大贡献。

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