Near streambed flow shapes microbial guilds within and across trophic levels in fluvial biofilms
Near streambed flow shapes microbial guilds within and across trophic levels in fluvial biofilms
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河床附近的水流塑造了河流生物膜营养级内和营养级之间的微生物群
DOI：
10.1002/lno.11451
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发表时间：
2020
影响因子：
4.5
通讯作者：
M. Weitere
中科院分区：
文献类型：
--
作者：
Ute Risse‐Buhl;Christine Anlanger;A. Chatzinotas;C. Noss;A. Lorke;M. Weitere
流动是生物膜群落的重要物理驱动力。在这里，我们测试了近床流在两个山区流到达生物膜微生物团（自养，异养细菌和异养原生生物）的结构和跨营养水平的影响。近床流速和湍流动能是构建群落内和跨功能团的多营养河流生物膜的重要物理驱动力。流动的影响被嵌套在季节和空间（跨流）的背景下。物理化学因子（温度，光照，溶解碳，营养盐）的变化沿着的河段是一样的，在两个流表明，在更大的时间尺度上的环境边界条件负责生物膜群落的季节性差异，而当地的微生物多样性的形状近床流。通常情况下，随着流量的增加，自养生物的丰度增加，这表明生物膜转向增加自养与增加剪切力。丝状菌自养生物似乎为较小的细菌提供了受剪切力保护的栖息地。异养原生生物丰度下降，导致减少食草动物与猎物的比例与流量。因此，细菌受益于在更快的流动，更动荡的网站放牧压力的减少。我们的研究结果表明，近床流可以影响通过微生物食物网的物质通量的大小和方向，并可能影响河流生物膜的生态系统功能。
Flow is an important physical driver of biofilm communities. Here, we tested the effects of the near bed flows in two mountainous stream reaches on the structure of biofilm microbial guilds (autotrophs, heterotrophic bacteria, and heterotrophic protists) within and across trophic levels. Near bed flow velocity and turbulent kinetic energy were important physical drivers for structuring the communities within and across guilds of the multitrophic fluvial biofilms. The effects of flow were nested in a seasonal and spatial (across‐streams) context. Changes in physicochemical factors (temperature, light, dissolved carbon, and nutrients) along the reaches were alike in both streams suggesting that environmental boundary conditions at larger temporal scales were responsible for the seasonal differences of biofilm communities, whereas locally microbial diversity was shaped by near bed flow. Typically, the abundance of autotrophs increased with flow, indicating that biofilms shifted toward increasing autotrophy with increasing shear forces. Filamentous autotrophs seemed to provide protected habitats from the shear forces for smaller sized bacteria. Heterotrophic protist abundance decreased with flow leading to decreasing grazer to prey ratio. Bacteria thus benefitted from a reduction in grazing pressure at faster flowing, more turbulent sites. Our results suggest that near bed flow can impact the magnitude and direction of matter fluxes through the microbial food web and possibly affect ecosystem functioning of fluvial biofilms.
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影响因子：
3.6
作者：
Moritz Thom;H. Schmidt;S. Gerbersdorf;S. Wieprecht
通讯作者：
Moritz Thom;H. Schmidt;S. Gerbersdorf;S. Wieprecht
影响因子：
4.4
作者：
J. Wey;K. Jürgens;M. Weitere
通讯作者：
J. Wey;K. Jürgens;M. Weitere
DOI：
10.1073/pnas.82.20.6955
发表时间：
1985-01-01
影响因子：
11.1
作者：
LANE, DJ;PACE, B;PACE, NR
通讯作者：
PACE, NR
Vectrino 剖面仪在沉积物-水界面处的性能
影响因子：
2.3
作者：
Anlanger
通讯作者：
Anlanger
影响因子：
12.8
作者：
Ute Risse‐Buhl;Christine Anlanger;K. Kalla;T. Neu;C. Noss;A. Lorke;M. Weitere
通讯作者：
Ute Risse‐Buhl;Christine Anlanger;K. Kalla;T. Neu;C. Noss;A. Lorke;M. Weitere