Headwaters are critical reservoirs of microbial diversity for fluvial networks.
Headwaters are critical reservoirs of microbial diversity for fluvial networks.
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DOI：
10.1098/rspb.2013.1760
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发表时间：
2013-11-22
期刊：
影响因子：
--
通讯作者：
Battin TJ
中科院分区：
文献类型：
--
作者：
Besemer K;Singer G;Quince C;Bertuzzo E;Sloan W;Battin TJ
溪流和河流在地球上形成了引人注目的网络，是自然界最有效的整合者。它们的树枝状结构延伸到陆地景观，并在从丰富的源头溪流到单一河口的途中积累水和沉积物。过去几十年来的普遍看法是，生物多样性也在下游积累。在这里，我们表明，这种模式并不适用于河流生物膜，这是在溪流和河流中的微生物生活的主导模式，并在其中履行关键的生态系统功能。使用454焦磷酸测序底栖生物膜从114流，我们发现，微生物多样性下降，从源头下游，特别是在汇合。我们认为，当地的环境和生物的相互作用可能会修改的影响，局部生物膜的生物多样性在整个网络的metacompatibility连接。此外，有一个高度的物种组成的变异性之间的源头溪流，不能用集水区之间的地理距离来解释。这表明，河流网络的树枝状性质限制了类似于动物的微生物多样性的分布模式。我们的观察突出的贡献，在维护微生物生物多样性的河流网络的源头。
Streams and rivers form conspicuous networks on the Earth and are among nature's most effective integrators. Their dendritic structure reaches into the terrestrial landscape and accumulates water and sediment en route from abundant headwater streams to a single river mouth. The prevailing view over the last decades has been that biological diversity also accumulates downstream. Here, we show that this pattern does not hold for fluvial biofilms, which are the dominant mode of microbial life in streams and rivers and which fulfil critical ecosystem functions therein. Using 454 pyrosequencing on benthic biofilms from 114 streams, we found that microbial diversity decreased from headwaters downstream and especially at confluences. We suggest that the local environment and biotic interactions may modify the influence of metacommunity connectivity on local biofilm biodiversity throughout the network. In addition, there was a high degree of variability in species composition among headwater streams that could not be explained by geographical distance between catchments. This suggests that the dendritic nature of fluvial networks constrains the distributional patterns of microbial diversity similar to that of animals. Our observations highlight the contributions that headwaters make in the maintenance of microbial biodiversity in fluvial networks.
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DOI：
10.1073/pnas.1119651109
发表时间：
2012-04-10
影响因子：
11.1
作者：
Carrara, Francesco;Altermatt, Florian;Rinaldo, Andrea
通讯作者：
Rinaldo, Andrea
影响因子：
18.3
作者：
Battin, Tom J.;Kaplan, Louis A.;Sabater, Francesc
通讯作者：
Sabater, Francesc
影响因子：
10.1
作者：
Luo, Y;Su, B;Field, CB
通讯作者：
Field, CB
影响因子：
4.8
作者：
Blanchet, F. Guillaume;Legendre, Pierre;Borcard, Daniel
通讯作者：
Borcard, Daniel
影响因子：
3.9
作者：
Altermatt, Florian;Seymour, Mathew;Martinez, Nicolas
通讯作者：
Martinez, Nicolas