000222846 001__ 222846
000222846 005__ 20181203024431.0
000222846 0247_ $$2doi$$a10.1111/gcb.13545
000222846 022__ $$a1365-2486
000222846 02470 $$2ISI$$a000400445900018
000222846 037__ $$aARTICLE
000222846 245__ $$aClimate-related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes
000222846 260__ $$bWiley-Blackwell$$c2017$$aHoboken
000222846 269__ $$a2017
000222846 300__ $$a14
000222846 336__ $$aJournal Articles
000222846 520__ $$aLakes 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. This article is protected by copyright. All rights reserved.
000222846 6531_ $$aallochthonous organic carbon
000222846 6531_ $$abacterial production
000222846 6531_ $$adissolved organic matter
000222846 6531_ $$adiversity
000222846 6531_ $$aheterotrophic
000222846 6531_ $$aphosphorus limitation
000222846 6531_ $$aterrestrial vegetation
000222846 6531_ $$atreeline
000222846 700__ $$aRofner, Carina
000222846 700__ $$0249153$$g262293$$aPeter, Hannes
000222846 700__ $$aCatalán, Núria
000222846 700__ $$aDrewes, Fabian
000222846 700__ $$aSommaruga, Ruben
000222846 700__ $$aPérez, María Teresa
000222846 773__ $$j23$$tGlobal change biology$$k6$$q2331–2344
000222846 909C0 $$xU13006$$0252520$$pSBER
000222846 909CO $$particle$$pENAC$$ooai:infoscience.tind.io:222846
000222846 917Z8 $$x221818
000222846 917Z8 $$x148230
000222846 937__ $$aEPFL-ARTICLE-222846
000222846 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000222846 980__ $$aARTICLE