Riverine fish diversity varies according to geographical isolation and land use modification.
Riverine fish diversity varies according to geographical isolation and land use modification.
复制标题
DOI：
10.1002/ece3.3237
复制
发表时间：
2017-10
影响因子：
2.6
通讯作者：
Jobling S
中科院分区：
文献类型：
--
作者：
Nicol E;Stevens JR;Jobling S
了解驱动物种遗传多样性相关性（SGDC）的环境因素对于设计适当的保护和管理策略以保护生物多样性至关重要。然而，很少有研究探讨土地利用模式的变化对SGDC的影响，特别是在水生群落。本文研究了红鲤（Rutilus rutilus L.）以及一个大型河流集水区19个地点的鱼类组成，跨越土地利用的梯度。我们的研究结果表明，一些，但不是所有的物种和遗传多样性终点之间存在显着的相关性。例如，整个泰晤士河流域的遗传和物种分化显示出微弱但显着的线性关系，但等位基因丰富度和鱼类种群丰度等其他多样性指标却没有表现出这种关系。物种和遗传多样性模式的进一步研究表明，土地利用集约化对鱼类多样性的影响不大，相比之下，地理隔离和土地利用集约化的综合影响。这些结果表明，在河岸生境的环境变化有可能放大流鱼类群落的组成在连接不良的河流延伸的变化。因此，鱼类种群的养护和管理战略应侧重于加强河流河段之间的连通性，并限制附近土地转为耕地或城市用途，以维持目前的生物多样性水平。
Understanding the environmental factors driving species‐genetic diversity correlations (SGDCs) is critical for designing appropriate conservation and management strategies to protect biodiversity. Yet, few studies have explored the impact of changing land use patterns on SGDCs specifically in aquatic communities. This study examined patterns of genetic diversity in roach (Rutilus rutilus L.) together with fish species composition across 19 locations in a large river catchment, spanning a gradient in land use. Our findings show significant correlations between some, but not all, species and genetic diversity end points. For example, genetic and species differentiation showed a weak but significant linear relationship across the Thames catchment, but additional diversity measures such as allelic richness and fish population abundance did not. Further examination of patterns in species and genetic diversity indicated that land use intensification has a modest effect on fish diversity compared to the combined influence of geographical isolation and land use intensification. These results indicate that environmental changes in riparian habitats have the potential to amplify shifts in the composition of stream fish communities in poorly connected river stretches. Conservation and management strategies for fish populations should, therefore, focus on enhancing connectivity between river stretches and limit conversion of nearby land to arable or urban use to maintain current levels of biodiversity.
登录
查看更多内容
影响因子：
6.6
作者：
Donald, Paul F.;Sanderson, Fiona J.;van Bommel, Frans P. J.
通讯作者：
van Bommel, Frans P. J.
影响因子：
4.1
作者：
Ketmaier, V.;Bianco, P. G.;Durand, J. -D.
通讯作者：
Durand, J. -D.
DOI：
10.1016/s1383-5742(00)00004-1
发表时间：
2000-07-01
影响因子：
5.3
作者：
Bickham, JW;Sandhu, S;Athwal, R
通讯作者：
Athwal, R
DOI：
10.1098/rspb.2001.1751
发表时间：
2001-10-07
影响因子：
4.7
作者：
Amos, W;Wilmer, JW;Coulson, T
通讯作者：
Coulson, T
影响因子：
3.4
作者：
Adams, Rachel I.;Vellend, Mark
通讯作者：
Vellend, Mark