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Environmental drivers of Sphagnum growth in peatlands across the Holarctic region

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Date
2020-08-26
Author(s)
Bengtsson, Fia,Uppsala University
Rydin, Håkan,Uppsala University
Baltzer, Jennifer,Wilfrid Laurier University
Bragazza, Luca,University of Ferrara
Bu, Zhao-Jun,Northeast Normal University
Caporn, Simon,Manchester Metropolitan University
Dorrepaal, Ellen,Umeå University
Flatberg, Kjell Ivar,Norwegian University of Science and Technology
Galanina, Olga,St. Petersburg State University*
Gałka, Mariusz,University of Lodz*
Ganeva, Anna,Bulgarian Academy of Sciences
Goia, Irina,Babeș-Bolyai University
Goncharova, Nadezhda,Russian Academy of Science*
Hajek, Michal,Masaryk University
Haraguchi, Akira,University of Kitakyushu*
Harris, Lorna,McGill University
Humphreys, Elyn,Carleton University
Jiroušek, Martin,Masaryk University
Kajukało, Katarzyna,Adam Mickiewicz University in Poznań
Karofeld, Edgar,University of Tartu
Koronatova, Natalia,Siberian Branch of the Russian Academy of Sciences
Kosykh, Natalia,Siberian Branch of the Russian Academy of Sciences
Laine, Anna,University of Eastern Finland
Lamentowicz, Mariusz,Adam Mickiewicz University *
Lapshina, Elena,Yugra State University*
Limpens, Juul,Wageningen University*
Linkosalmi, Maiju,Finnish Meteorological Institute
Ma, Jinze,Northeast Normal University
Mauritz, Marguerite,Northern Arizona University
Mitchell, Edward,University of Neuchâtel
Munir, Tariq,University of Calgary
Natali, Susan,Woods Hole Research Center
Natcheva, Rayna,Bulgarian Academy of Sciences
Philippov, Dmitriy,Russian Academy of Sciences
Rice, Steven,Union College
Robinson, Sean,SUNY-Oneonta*
Robroek, Bjorn,Radboud University*
Rochefort, Line,Laval University*
Singer, David,University of Neuchâtel
Stenøien, Hans,Norwegian University of Science and Technology
Tuittila, Eeva-Stiina,University of Eastern Finland
Vellak, Kai,University of Tartu
Waddington, (James) Mike,McMaster University
Granath, Gustaf,Uppsala University
Payne, Richard J.,Environment and Geography, University of York*
Unique identifier
10.5061/dryad.1ns1rn8rm
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Research data

Citation
Bengtsson, Fia,Uppsala University. Rydin, Håkan,Uppsala University. Baltzer, Jennifer,Wilfrid Laurier University. Bragazza, Luca,University of Ferrara. Bu, Zhao-Jun,Northeast Normal University. Caporn, Simon,Manchester Metropolitan University. Dorrepaal, Ellen,Umeå University. Flatberg, Kjell Ivar,Norwegian University of Science and Technology. Galanina, Olga,St. Petersburg State University*. Gałka, Mariusz,University of Lodz*. Ganeva, Anna,Bulgarian Academy of Sciences. Goia, Irina,Babeș-Bolyai University. Goncharova, Nadezhda,Russian Academy of Science*. Hajek, Michal,Masaryk University. Haraguchi, Akira,University of Kitakyushu*. Harris, Lorna,McGill University. Humphreys, Elyn,Carleton University. Jiroušek, Martin,Masaryk University. Kajukało, Katarzyna,Adam Mickiewicz University in Poznań. Karofeld, Edgar,University of Tartu. Koronatova, Natalia,Siberian Branch of the Russian Academy of Sciences. Kosykh, Natalia,Siberian Branch of the Russian Academy of Sciences. Laine, Anna,University of Eastern Finland. Lamentowicz, Mariusz,Adam Mickiewicz University *. Lapshina, Elena,Yugra State University*. Limpens, Juul,Wageningen University*. Linkosalmi, Maiju,Finnish Meteorological Institute. Ma, Jinze,Northeast Normal University. Mauritz, Marguerite,Northern Arizona University. Mitchell, Edward,University of Neuchâtel. Munir, Tariq,University of Calgary. Natali, Susan,Woods Hole Research Center. Natcheva, Rayna,Bulgarian Academy of Sciences. Philippov, Dmitriy,Russian Academy of Sciences. Rice, Steven,Union College. Robinson, Sean,SUNY-Oneonta*. Robroek, Bjorn,Radboud University*. Rochefort, Line,Laval University*. Singer, David,University of Neuchâtel. Stenøien, Hans,Norwegian University of Science and Technology. Tuittila, Eeva-Stiina,University of Eastern Finland. Vellak, Kai,University of Tartu. Waddington, (James) Mike,McMaster University. Granath, Gustaf,Uppsala University. Payne, Richard J.,Environment and Geography, University of York*. , Environmental drivers of Sphagnum growth in peatlands across the Holarctic region, 2020, 10.5061/dryad.1ns1rn8rm.
Abstract

The relative importance of global versus local environmental factors for growth and thus carbon uptake of the bryophyte genus Sphagnum – the main peat-former and ecosystem engineer in northern peatlands – remains unclear. 2) We measured length growth and net primary production (NPP) of two abundant Sphagnum species across 99 Holarctic peatlands. We tested the importance of previously proposed abiotic and biotic drivers for peatland carbon uptake (climate, N deposition, water table depth, and vascular plant cover) on these two responses. Employing structural equation models, we explored both indirect and direct effects of drivers on Sphagnum growth. 3) Variation in growth was large, but similar within and between peatlands. Length growth showed a stronger response to predictors than NPP. Moreover, the smaller and denser Sphagnum fuscum growing on hummocks had weaker responses to climatic variation than the larger and looser S. magellanicum growing in the wetter conditions. Growth decreased with increasing vascular plant cover within a site. Between sites, precipitation and temperature increased growth for S. magellanicum. The structural equation models indicated that indirect effects are important. For example, vascular plant cover increased with a deeper water table, increased nitrogen deposition, precipitation and temperature. These factors also influenced Sphagnum growth indirectly by affecting moss shoot density. 4) Synthesis Our results imply that in a warmer climate, S. magellanicum will increase length growth as long as precipitation is not reduced, while S. fuscum is more resistant to decreased precipitation, but also less able to take advantage of increased precipitation and temperature. Such species-specific sensitivity to climate may affect competitive outcomes in a changing environment, and potentially the future carbon sink function of peatlands.

Subjects
climate   global change   nitrogen deposition   Net primary production   peatlands   peat mosses   structural equation model   PAR   Plant–climate interactions   climate   global change   nitrogen deposition   Net primary production   peatlands   peat mosses   structural equation model   PAR   Plant–climate interactions   
URI
https://erepo.uef.fi/handle/123456789/8276
Link to the original item
https://zenodo.org/record/4001413
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