...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Archiv fur Hydrobiologie >Macroinvertebrates of a fluvial system in Patagonia: altitudinal zonation and functional structure
【24h】

Macroinvertebrates of a fluvial system in Patagonia: altitudinal zonation and functional structure

机译：巴塔哥尼亚河流系统的大型无脊椎动物：垂直带和功能结构

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

Most investigations of altitudinal zonation of river macrobenthic communities have been conducted in the northern hemisphere. Conversely, South American habitats, and specifically the Argentinean ones, are poorly known. This is the first study of altitudinal zonation of macrobenthic communities in the Patagonian Andes. It was carried out at 14 sampling stations along 51 km of the Esquel-Percy River system over a 1000 m altitudinal gradient. Untreated sewage of Esquel City discharges in the middle section of the system. The main species assemblages of the monitored sites were identified and a functional categorization of the taxa was produced. Population distribution patterns were analyzed throughout a complete annual cycle, and both qualitative and quantitative variations were interpreted as a function of abiotic and biotic variables. The macrobenthic community found along the Esquel-Percy system is rich and diverse, except at middle-stretch stations, which are altered by anthropogenic perturbations. Specific composition, diversity and density were influenced by the topographic gradient, geochemical (conductivity and total alkalinity) and anthropogenic factors (BOD and oxygen saturation), and the seasonality of the system. Similarities with lotic environments of Australia and New Zealand were found in specific composition, density, and community structure. The biomass of shredders and predators decreased, while collectors increased, downstream from the headwaters. Collector-gatherers were the most important group at all sites. Functional organization showed better correspondence with the RCC model if biomass was used instead of macroinvertebrate density. We found that local and regional characteristics produced deviations from the RCC model, but it is still useful as a comprehensive framework for stream ecology in the Patagonian Andes. [References: 65]
机译：河流大型底栖动物群落的海拔分区的大多数研究是在北半球进行的。相反，南美人的栖息地，尤其是阿根廷人的栖息地，鲜为人知。这是对巴塔哥尼亚安第斯山脉大型底栖动物群落的垂直分区的首次研究。它是沿着Esquel-Percy River系统51 km的14个采样站在1000 m的海拔高度上进行的。溢达城未经处理的污水在系统中部排放。确定了受监测地点的主要物种组合，并对分类单元进行了功能分类。在整个完整的年度周期中分析了人口分布模式，并将定性和定量变化都解释为非生物和生物变量的函数。沿溢达—珀西系统发现的大型底栖动物群落丰富多样，但中伸展站除外，中伸展站因人为扰动而改变。具体的组成，多样性和密度受地形梯度，地球化学（电导率和总碱度）和人为因素（BOD和氧饱和度）以及系统季节的影响。在特定的组成，密度和社区结构方面，发现与澳大利亚和新西兰的战利品环境相似。在源头下游，粉碎机和捕食者的生物量减少，而捕集者的生物量增加。收集者是所有场所中最重要的群体。如果使用生物量代替大型无脊椎动物密度，功能组织显示出与RCC模型更好的对应性。我们发现局部和区域特征产生了与RCC模型的偏差，但它仍然是巴塔哥尼亚安第斯山脉中河流生态学的综合框架。 [参考：65]

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