Nutrient enrichment induces dormancy and decreases diversity of active bacteria in salt marsh sediments.
Nutrient enrichment induces dormancy and decreases diversity of active bacteria in salt marsh sediments.
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DOI：
10.1038/ncomms12881
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发表时间：
2016-09-26
影响因子：
16.6
通讯作者：
Bowen, Jennifer L.
中科院分区：
文献类型：
--
作者：
Kearns, Patrick J.;Angell, John H.;Howard, Evan M.;Deegan, Linda A.;Stanley, Rachel H. R.;Bowen, Jennifer L.
微生物控制着关键的生物地球化学途径，因此微生物多样性、群落结构和活动的变化可以影响生态系统对环境驱动因素的反应。了解控制环境中活跃微生物比例的因素以及它们在受到干扰时如何变化，对于预测生态系统对全球变化的反应至关重要。不断增加的人为氮供应给全球生态系统，使得我们必须了解养分供应如何改变活跃的微生物群落。在这里，我们表明，在盐沼中添加氮会导致活跃的微生物群落发生变化，尽管整个群落没有变化。群落的活跃转移导致休眠微生物类群的比例翻了一番，从45%增加到90%，并导致群落活跃部分的多样性丧失。我们的结果表明，盐沼的扰动可以极大地改变活跃的微生物群落，但这些群落可能会通过增加休眠来保护总的多样性，从而保持弹性。越来越多的人为氮输入生物圈，正在从根本上改变世界各地的生态系统。在这里，卡恩斯等人。结果表明，盐沼十年的氮素添加减少了活跃微生物的比例，尽管整个微生物群落没有净变化。
Microorganisms control key biogeochemical pathways, thus changes in microbial diversity, community structure and activity can affect ecosystem response to environmental drivers. Understanding factors that control the proportion of active microbes in the environment and how they vary when perturbed is critical to anticipating ecosystem response to global change. Increasing supplies of anthropogenic nitrogen to ecosystems globally makes it imperative that we understand how nutrient supply alters active microbial communities. Here we show that nitrogen additions to salt marshes cause a shift in the active microbial community despite no change in the total community. The active community shift causes the proportion of dormant microbial taxa to double, from 45 to 90%, and induces diversity loss in the active portion of the community. Our results suggest that perturbations to salt marshes can drastically alter active microbial communities, however these communities may remain resilient by protecting total diversity through increased dormancy. Increased anthropogenic nitrogen inputs into the biosphere are fundamentally altering ecosystems worldwide. Here, Kearns et al. show that a decade of nitrogen additions to salt marshes reduces the proportion of active microorganisms, despite no net change to the total microbial community.
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DOI：
10.1007/bf02907647
发表时间：
2004-08-01
期刊：
ESTUARIES
影响因子：
--
作者：
Borges, AV;Vanderborght, JP;Frankignoulle, M
通讯作者：
Frankignoulle, M
影响因子：
3.7
作者：
Gilbert JA;Field D;Swift P;Thomas S;Cummings D;Temperton B;Weynberg K;Huse S;Hughes M;Joint I;Somerfield PJ;Mühling M
通讯作者：
Mühling M
影响因子：
11
作者：
Blazewicz, Steven J.;Barnard, Romain L.;Firestone, Mary K.
通讯作者：
Firestone, Mary K.
影响因子：
4.5
作者：
Bowen, J. L.;Crump, B. C.;Hobbie, J. E.
通讯作者：
Hobbie, J. E.
DOI：
10.1073/pnas.1310880110
发表时间：
2013-07-16
影响因子：
11.1
作者：
Isbell, Forest;Reich, Peter B.;Binder, Seth
通讯作者：
Binder, Seth