globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13545
论文题名:
Climate-related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes
作者: Rofner C.; Peter H.; Catalán N.; Drewes F.; Sommaruga R.; Pérez M.T.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:6
起始页码: 2331
结束页码: 2344
语种: 英语
英文关键词: allochthonous organic carbon ; bacterial production ; dissolved organic matter ; diversity ; heterotrophic ; phosphorus limitation ; terrestrial vegetation ; treeline
Scopus关键词: Bacteria (microorganisms)
英文摘要: Lakes at high altitude and latitude are typically unproductive ecosystems where external factors outweigh the relative importance of in-lake processes, making them ideal sentinels of climate change. Climate change is inducing upward vegetation shifts at high altitude and latitude regions that translate into changes in the pools of soil organic matter. Upon mobilization, this allochthonous organic matter may rapidly alter the composition and function of lake bacterial communities. Here, we experimentally simulate this potential climate-change effect by exposing bacterioplankton of two lakes located above the treeline, one in the Alps and one in the subarctic region, to soil organic matter from below and above the treeline. Changes in bacterial community composition, diversity and function were followed for 72 h. In the subarctic lake, soil organic matter from below the treeline reduced bulk and taxon-specific phosphorus uptake, indicating that bacterial phosphorus limitation was alleviated compared to organic matter from above the treeline. These effects were less pronounced in the alpine lake, suggesting that soil properties (phosphorus and dissolved organic carbon availability) and water temperature further shaped the magnitude of response. The rapid bacterial succession observed in both lakes indicates that certain taxa directly benefited from soil sources. Accordingly, the substrate uptake profiles of initially rare bacteria (copiotrophs) indicated that they are one of the main actors cycling soil-derived carbon and phosphorus. Our work suggests that climate-induced changes in soil characteristics affect bacterioplankton community structure and function, and in turn, the cycling of carbon and phosphorus in high altitude and latitude aquatic ecosystems. © 2016 The Authors. Global Change Biology Published by John Wiley & Sons Ltd.
资助项目: The research leading to these results has received funding from the European Union Seventh Framework Programme [FP7/2007-2013] under grant agreement no 262693 [INTERACT] to CR and the Austrian Science Fund (FWF) through project P-24098-B22 to MTP and RS. We thank Josef Franzoi, Gry Larsen and Salvador Morales-Gomez for chemical analyses at the University of Innsbruck. Further, we would like to thank Antero Järvinen, Rauni Partanen, Oula Kalttopää and Pirjo Hakala from Kilpisjärvi Biological Station who helped with setting up and organizing the experiments in Finland and Laurent Moya and Jolien Scholten for help during the experiment in Austria. Special thanks to Jim Cotner for his feedback on this manuscript. NC hold a postdoctoral grant from the Wenner-Gren Foundation (2014–2016) and a ‘Juan de la Cierva’ Postdoctoral Grant (FJCI-2014-23064). The work reported is part of the doctoral dissertation of CR. The authors declare no conflict of interest.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60923
Appears in Collections:影响、适应和脆弱性

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作者单位: Lake and Glacier Ecology Research Group, Institute of Ecology, University of Innsbruck, Technikerstraße 25, Innsbruck, Austria; Limnology, Department of Ecology and Genetics, University of Uppsala, Uppsala, Sweden; Catalan Institute for Water Research (ICRA), Emili Grahit 101, Girona, Spain; Stream Biofilm and Ecosystem Research Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; ARGE Limnologie, Angewandte Gewässerökologie GesmbH, Innsbruck, Austria

Recommended Citation:
Rofner C.,Peter H.,Catalán N.,et al. Climate-related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes[J]. Global Change Biology,2017-01-01,23(6)
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