Deforesting the riverscape: the effects of wood on fish diversity in a Venezuelan piedmont stream
Deforesting the riverscape: the effects of wood on fish diversity in a Venezuelan piedmont stream
复制标题
砍伐河流景观：木材对委内瑞拉山麓溪流中鱼类多样性的影响
DOI：
10.1016/j.biocon.2004.02.022
复制
发表时间：
2004
影响因子：
5.9
通讯作者：
A. Flecker
中科院分区：
文献类型：
--
作者：
J. Wright;A. Flecker
虽然热带生态系统的砍伐已被证明对陆地生境有重大影响，但对其对水生生境的影响研究很少。森林砍伐极大地减少了木质碎屑对溪流的输入，鉴于大型木质碎屑对温带溪流鱼类群落的重要性，这可能是伐木可能影响热带水生生态系统的一种机制。为了研究大型木质垃圾对热带溪流鱼类多样性的影响，我们调查了委内瑞拉里约拉斯马里亚斯的木质池塘和没有木质池塘。有木头的池子比没有木头的池子里有更多的个体和更多种类的鱼，两种类型的池子的组成不同。为了测试这些结果是否由于木质碎屑的存在，我们进行了一次试验性的木材添加。与不加木材的池塘相比，添加木材的池塘在鱼类丰富度和物种丰富度方面都有显著增加，实验池塘中鱼类的组成接近于有自然产生的木质碎屑的池塘。这些结果表明，大型木质碎屑在热带溪流鱼类群落结构中起着重要作用。因此，减少向热带溪流输入木质碎屑或直接从溪流中移走木材的伐木做法可能会对水生生境产生严重影响，影响到多样化的鱼类群落和依赖溪流渔业的当地经济。
While deforestation of tropical ecosystems has been shown to have significant impacts on terrestrial habitats, its effects on aquatic habitats are poorly studied. Deforestation dramatically reduces the input of woody debris to streams, and given the importance of large woody debris to fish communities in temperate streams, this might be one mechanism by which logging could affect aquatic ecosystems in the tropics. To examine the effects of large woody debris on the diverse fish assemblage of a tropical stream, we surveyed pools with and without wood at Rio Las Marias, Venezuela. Pools containing wood contained greater numbers of individuals and more species of fish than pools without wood, and the two types of pools differed in their composition. To test whether these results were due to the presence of woody debris, we conducted an experimental wood addition. Pools to which wood was added showed marked increases in both fish abundance and species richness relative to wood-free pools, and the composition of the fish assemblage in experimental pools approached that of pools with naturally occurring woody debris. These results demonstrate that large woody debris plays a major role in structuring fish communities in tropical streams. As a consequence, logging practices that reduce the input of woody debris to tropical streams or directly remove wood from streams could have serious impacts on aquatic habitats, affecting both the diverse fish communities and local economies dependent on stream fisheries.
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
池山豊;永田靖;永田靖;永田 靖(編著);Yasushi Nagata(eds.)
通讯作者：
Yasushi Nagata(eds.)