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Fast Responses of Root Dynamics to Increased Snow Deposition and Summer Air Temperature in an Arctic Wetland.
Front Plant Sci. 2018; 9:1258
Publication Type
Journal Article
Ludovica D'Imperio
Marie F Arndal
Cecilie S Nielsen
Bo Elberling
Inger K Schmidt
Author Affiliation
Center for Permafrost (CENPERM), Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark.
Front Plant Sci. 2018; 9:1258
Publication Type
Journal Article
In wet tundra ecosystems, covering vast areas of the Arctic, the belowground plant biomass exceeds the aboveground, making root dynamics a crucial component of the nutrient cycling and the carbon (C) budget of the Arctic. In response to the projected climatic scenarios for the Arctic, namely increased temperature and changes in precipitation patterns, root dynamics may be altered leading to significant changes in the net ecosystem C budget. Here, we quantify the single and combined effects of 1 year of increased winter snow deposition by snow fences and summer warming by open-top chambers (OTCs) on root dynamics in a wetland at Disko Island (West Greenland). Based on ingrowth bags, snow accumulation decreased root productivity by 42% in the 0-15 cm soil depth compared to ambient conditions. Over the growing season 2014, minirhizotron observations showed that root growth continued until mid-September in all treatments, and it peaked between the end of July and mid-August. During the season, plots exposed to experimental warming showed a significant increase in root number during September (between 39 and 53%) and a 39% increase in root length by the beginning of September. In addition, a significant reduction of root diameter (14%) was observed in plots with increased snow accumulation. Along the soil profile (0-40 cm) summer warming by OTCs significantly increased the total root length (54%), root number (41%) and the root growth in the 20-30 cm soil depth (71%). These results indicate a fast response of this ecosystem to changes in air temperature and precipitation. Hence, on a short-term, summer warming may lead to increased root depth and belowground C allocation, whereas increased winter snow precipitation may reduce root production or favor specific plant species by means of reduced growing season length or increased nutrient cycling. Knowledge on belowground root dynamics is therefore critical to improve the estimation of the C balance of the Arctic.
Cites: Plant Sci. 2011 Jan;180(1):157-67 PMID 21421357
Cites: New Phytol. 2016 Feb;209(3):978-86 PMID 26390239
Cites: Sci Rep. 2015 Dec 09;5:17951 PMID 26647837
Cites: Sci Rep. 2018 Jan 25;8(1):1586 PMID 29371633
Cites: Oecologia. 1999 Sep;120(4):575-581 PMID 28308308
Cites: Sci Total Environ. 2016 May 15;553:297-304 PMID 26933965
Cites: Ecol Appl. 2015 Jan;25(1):99-115 PMID 26255360
Cites: Glob Chang Biol. 2015 Jun;21(6):2410-23 PMID 25788025
Cites: New Phytol. 2008;179(3):837-47 PMID 18537885
Cites: Oecologia. 2005 Feb;142(4):616-26 PMID 15688218
Cites: New Phytol. 2015 Jan;205(1):34-58 PMID 25209220
Cites: Glob Chang Biol. 2014 Oct;20(10):3256-69 PMID 24599697
Cites: Glob Chang Biol. 2015 Dec;21(12):4520-32 PMID 26183112
Cites: Nature. 2004 Sep 23;431(7007):440-3 PMID 15386009
Cites: J Exp Bot. 2016 Jun;67(12):3617-28 PMID 26931171
Cites: New Phytol. 2007;176(4):862-73 PMID 17937761
Cites: New Phytol. 2015 Feb;205(3):1054-61 PMID 25729805
Cites: Oecologia. 1977 Mar;28(1):57-65 PMID 28309688
Cites: Oecologia. 2007 Sep;153(3):643-52 PMID 17497180
PubMed ID
30214452 View in PubMed
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