Why life history information matters: drought refuges and macroinvertebrate persistence in non-perennial streams subject to a drier climate
Why life history information matters: drought refuges and macroinvertebrate persistence in non-perennial streams subject to a drier climate
复制标题
为什么生活史信息很重要：干旱避难所和大型无脊椎动物在气候干燥的非常年溪流中的持久存在
DOI：
10.1071/mf10062
复制
发表时间：
2011
影响因子：
1.8
通讯作者：
C. Austin
中科院分区：
文献类型：
--
作者：
B. Robson;E. Chester;C. Austin
在一些干旱、半干旱或地中海气候地区，增加水提取加上气候变化将延长非常年溪流的干旱期，但对大型无脊椎动物种群的影响知之甚少。干旱避难所使物种能够在干旱中生存，但它们的使用取决于物种的特征，避难所的可用性取决于景观结构。这篇评论评估了现有的生态概念预测干旱避难所的作用，以维持生物多样性在非常年流的效用。我们还提出了可能决定无脊椎动物物种对长期干燥的抵抗力或恢复力的特征。现有的生态概念，如物种的生物学特性及其与栖息地模板的相互作用，障碍扩散和集合种群动态，使用干旱避难所，栖息地破碎化和人口和景观遗传学的人口增加流干燥的部分可能的反应。然而，对非常年溪流中无脊椎动物生活史的有限了解限制了我们以预测方式使用这些概念的能力。特别是，到达或池占用物种不能准确地预测，但这种预测是必要的评估潜在的管理行动，如使用环境流量，以维持干旱避难所在干旱时期。
In some arid, semi-arid or Mediterranean climate regions, increased water extraction combined with climate change will prolong periods of drought in non-perennial streams, but the effects on macroinvertebrate populations are poorly understood. Drought refuges allow species to survive drying but their use depends on species' traits, and refuge availability depends on landscape structure. This review evaluates the utility of existing ecological concepts for predicting the role of drought refuges for sustaining biodiversity in non-perennial streams. We also suggest traits that may determine invertebrate species' resistance or resilience to prolonged drying. Parts of the likely responses by populations to increased stream drying are described by existing ecological concepts, such as the biological traits of species and their interaction with the habitat templet, barriers to dispersal and metapopulation dynamics, the use of drought refuges, habitat fragmentation and population and landscape genetics. However, the limited knowledge of invertebrate life histories in non-perennial streams restricts our ability to use these concepts in a predictive manner. In particular, reach or pool occupancy by species cannot be accurately predicted, but such predictions are necessary for evaluating potential management actions such as the use of environmental flows to sustain drought refuges during dry periods.