...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of the North American Benthological Society >Organic matter breakdown and ecosystem metabolism: functional indicators for assessing river ecosystem health
【24h】

Organic matter breakdown and ecosystem metabolism: functional indicators for assessing river ecosystem health

机译：有机物分解和生态系统新陈代谢：评估河流生态系统健康的功能指标

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

River health monitoring traditionally has made use of structural measurements (water quality or taxonomic composition of aquatic organisms). We argue that a more complete assessment of river health should include functional metrics, such as rates of organic matter decomposition and ecosystem metabolism. Leaf breakdown links the characteristics of riparian vegetation with the activity of both aquatic invertebrates and microbial organisms and is affected by natural and human-induced variation in a wide range of environmental factors. Measurement of leaf breakdown is relatively simple and has modest equipment requirements. River metabolism (gross primary productivity and ecosystem respiration) measures the rates of production and use of organic C in river ecosystems as a whole, providing a direct estimate of the food base that determines life-supporting capacity. Metabolism measurements require more sophisticated equipment than do measurements of leaf breakdown, but improvements in technology have made metabolism measurements relatively easy. We review the factors that influence leaf breakdown and river metabolism and pay particular attention to the effects of human-induced environmental stressors. We also describe how measurements can be standardized and suggest criteria for interpreting functional measures in terms of river ecosystem health. Last, we consider the strengths and weaknesses of both methods as functional measures and provide recommendations for their use as biomonitoring tools.
机译：传统上，河流健康监测利用结构测量（水质或水生生物的分类学组成）。我们认为，对河流健康的更全面评估应包括功能指标，例如有机物分解速率和生态系统新陈代谢。叶片破裂将河岸植被的特征与水生无脊椎动物和微生物的活动联系在一起，并受到自然和人为因素在各种环境因素中的变化的影响。叶片破裂的测量相对简单，并且对设备的要求不高。河流新陈代谢（总初级生产力和生态系统呼吸）测量整个河流生态系统中有机碳的生产和使用速率，直接确定决定生命维持能力的食物基础。代谢测量需要比叶片破裂测量更复杂的设备，但是技术的进步使代谢测量相对容易。我们审查了影响叶片分解和河流新陈代谢的因素，并特别注意了人为环境应激源的影响。我们还描述了如何将测量标准化，并就解释河流生态系统健康方面的功能性措施提出了标准。最后，我们将这两种方法的优点和缺点都视为功能性措施，并提供了将其用作生物监测工具的建议。

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