期刊
ISME JOURNAL
卷 11, 期 3, 页码 613-625出版社
SPRINGERNATURE
DOI: 10.1038/ismej.2016.159
关键词
-
资金
- National Science Foundation [31225004, U1202231, 31500376]
- MARS project (Managing Aquatic ecosystems and water resources under multiple stress) funded under the Seventh EU Framework Programme, Theme 6 (Environment including Climate Change) [603378]
- 'CLEAR' (a Villum Kann Rasmussen Centre of Excellence project)
- CRES
- CIRCE
- Chinese Academy of Sciences [QYZDJ-SSW-DQC030, KZZD-EW-TZ-08]
The current climate warming and eutrophication are known to interactively threaten freshwater biodiversity; however, the interactive effects on lacustrine bacterioplankton diversity remain to be determined. Here, we analyzed the spring bacterioplankton community composition (BCC) in 24 outdoor, flow-through mesocosms (mimicking shallow lake environments) under 3 temperature scenarios and 2 nutrient regimes. Our results revealed that neither long-term warming (8.5 years) nor nutrient enrichment had significant effects on bacterioplankton alpha diversity, whereas long-term enhanced warming (elevated 50% above the IPCC A2 climate scenario) and nutrient enrichment in combination increased bacterioplankton beta diversity. We also found that BCC shifted significantly under enhanced warming and nutrient-enriched conditions towards decreased relative abundances of Actinobacteria, Bacteroidetes and Betaproteobacteria, whereas the percentages of Cyanobacteria, total rare phyla and unclassified phyla significantly increased. Null-model tests indicated that deterministic processes played a more important role than stochastic processes in determining BCC. However, the relative importance of stochasticity, primarily ecological drift, was enhanced and contributed to the increased beta diversity of BCC under enhanced warming and nutrient-enriched conditions. Overall, our study suggests that the synergetic effects of warming and nutrient enrichment may result in high variability in the composition of bacterioplankton communities in lacustrine water bodies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据