...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aquatic Sciences >Assessing water stress in Mediterranean lotic systems: insights from an artificially intermittent river in Greece
【24h】

Assessing water stress in Mediterranean lotic systems: insights from an artificially intermittent river in Greece

机译：评估地中海抽水系统的水压力：来自希腊人为间歇性河流的见解

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

Water stress in Mediterranean countries is the result of both variable and changing climatic conditions and widespread anthropogenic pressures. Evrotas, an intermittent river located in Southern Greece, was used as a case study to assess the impacts of water stress on Mediterranean lotic ecosystems. Based on hydrological analyses, it was revealed that during prolonged drought years, such as the summers of 2007 and 2008, the vast majority of the Evrotas riverbed was completely desiccated, primarily as a result of substantial water abstraction for irrigation. The effects of desiccation on the riverine ecosystem were evaluated using fish and macroinvertebrate assemblages according to the demands of the Water Framework Directive 2000/60/EC (WFD). Faunal responses to water stress were assessed through comparisons of assemblages attributes in perennial and intermittent reaches and pre-drought versus post-drought communities. Effects of hydrological disturbance on fish species richness, density, percentage composition and size structure were more pronounced in intermittent than in perennial sites. The most obvious and immediate impact was the elimination of populations in the intermittent reaches. However, upon flow resumption, the recolonisation from upstream perennial reaches began, thereby permitting partial re-establishment of the depleted fish communities. Nevertheless, the structural integrity of fish communities remained severely impacted and recovery was markedly slow. On the contrary, post-drought macroinvertebrate assemblages were not affected by summer droughts, and the recruitment processes were rapid after flow resumption. Our findings point to the necessity of establishing a distinction between naturally and artificially driven intermittent rivers. We, therefore, propose the introduction of an "artificially intermittent Mediterranean river" condition within the context of the WFD assessment applications.
机译：地中海国家的缺水是气候条件变化和变化以及广泛的人为压力的结果。 Evrotas是位于希腊南部的断断续续的河流，被用作案例研究来评估水分胁迫对地中海Lotic生态系统的影响。根据水文分析，结果表明，在长期干旱期间，例如2007年和2008年夏季，Evrotas河床的绝大部分被完全干燥，这主要是由于大量抽水用于灌溉的结果。根据水框架指令2000/60 / EC（WFD）的要求，使用鱼和大型无脊椎动物组合评估了干旱对河流生态系统的影响。通过比较多年生和间歇性河段以及干旱前和干旱后社区的组合属性，评估了动物对水分胁迫的反应。与多年生地点相比，间歇性水文干扰对鱼类物种丰富度，密度，百分比组成和大小结构的影响更为明显。最明显和最直接的影响是消除了间歇性河段的人口。但是，在流量恢复后，上游多年生植物种群开始重新定殖，从而使枯竭的鱼类群落得以部分重建。然而，鱼类群落的结构完整性仍然受到严重影响，恢复速度明显缓慢。相反，干旱后的大型无脊椎动物种群不受夏季干旱的影响，恢复流量后募集过程很快。我们的研究结果表明有必要在自然和人工驱动的间歇性河流之间进行区分。因此，我们建议在WFD评估申请的背景下引入“人为间断的地中海河流”条件。

著录项

  • 来源
    《Aquatic Sciences》 |2011年第4期|p.581-597|共17页
  • 作者

    N. Th. Skoulikidis; L. Vardakas; I. Karaouzas; A. N. Economou; E. Dimitriou; S. Zogaris;

  • 作者单位

    Institute of Inland Waters, Hellenic Centre for Marine Research,46.7 km Athens-Sounio Av, 19013 Anavissos, Attica, Greece;

    Institute of Inland Waters, Hellenic Centre for Marine Research,46.7 km Athens-Sounio Av, 19013 Anavissos, Attica, Greece;

    Institute of Inland Waters, Hellenic Centre for Marine Research,46.7 km Athens-Sounio Av, 19013 Anavissos, Attica, Greece;

    Institute of Inland Waters, Hellenic Centre for Marine Research,46.7 km Athens-Sounio Av, 19013 Anavissos, Attica, Greece;

    Institute of Inland Waters, Hellenic Centre for Marine Research,46.7 km Athens-Sounio Av, 19013 Anavissos, Attica, Greece;

    Institute of Inland Waters, Hellenic Centre for Marine Research,46.7 km Athens-Sounio Av, 19013 Anavissos, Attica, Greece;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    mediterranean; water stress; intermittent rivers; drought; fish; macroinvertebrates;

    机译：地中海;水分胁迫;间断河流;干旱;鱼类;无脊椎动物;

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