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Marcin Antoni Jackowicz-Korczynski

Refining the role of phenology in regulating gross ecosystem productivity across European peatlands

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  • Franziska Koebsch, Univ Rostock, University of Rostock, Dept Landscape Ecol & Site Evaluat
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  • Oliver Sonnentag, Univ Montreal, University of Montreal, Ctr Etud Nord
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  • Jarvi Jarveoja, Swedish Univ Agr Sci, Swedish University of Agricultural Sciences, Dept Forest Ecol & Management
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  • Mikko Peltoniemi, Nat Resources Inst Finland, Natural Resources Institute Finland (Luke)
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  • Pavel Alekseychik, Univ Helsinki, University of Helsinki, Inst Atmospher & Earth Syst Res INAR
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  • Mika Aurela, Finnish Meteorol Inst, Finnish Meteorological Institute
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  • Ali Nadir Arslan, Finnish Meteorol Inst, Finnish Meteorological Institute
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  • Kerry Dinsmore, Ctr Ecol & Hydrol, NERC Natural Environment Research Council, UK Centre for Ecology & Hydrology (UKCEH)
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  • Damiano Gianelle, Fdn Edmund Mach, Fondazione Edmund Mach, Dept Sustainable Agroecosyst & Bioresources, Res & Innovat Ctr
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  • Carole Helfter, Ctr Ecol & Hydrol, NERC Natural Environment Research Council, UK Centre for Ecology & Hydrology (UKCEH)
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  • Marcin Jackowicz-Korczynski
  • Aino Korrensalo, Univ Eastern Finland, University of Eastern Finland, Sch Forest Sci
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  • Fraser Leith, Ctr Ecol & Hydrol, NERC Natural Environment Research Council, UK Centre for Ecology & Hydrology (UKCEH)
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  • Maiju Linkosalmi, Finnish Meteorol Inst, Finnish Meteorological Institute
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  • Annalea Lohila, Finnish Meteorol Inst, Finnish Meteorological Institute
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  • Magnus Lund
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  • Martin Maddison, Univ Tartu, University of Tartu, Dept Geog
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  • Ivan Mammarella, Nat Resources Inst Finland, Natural Resources Institute Finland (Luke)
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  • Ulo Mander, Univ Tartu, University of Tartu, Dept Geog
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  • Kari Minkkinen, Univ Helsinki, University of Helsinki, Dept Forest Sci
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  • Amy Pickard, Ctr Ecol & Hydrol, NERC Natural Environment Research Council, UK Centre for Ecology & Hydrology (UKCEH)
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  • Johannes W. M. Pullens
  • Eeva-Stiina Tuittila, Univ Eastern Finland, University of Eastern Finland, Sch Forest Sci
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  • Mats B. Nilsson, Swedish Univ Agr Sci, Swedish University of Agricultural Sciences, Dept Forest Ecol & Management
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  • Matthias Peichl, Swedish Univ Agr Sci, Swedish University of Agricultural Sciences, Dept Forest Ecol & Management

The role of plant phenology as a regulator for gross ecosystem productivity (GEP) in peatlands is empirically not well constrained. This is because proxies to track vegetation development with daily coverage at the ecosystem scale have only recently become available and the lack of such data has hampered the disentangling of biotic and abiotic effects. This study aimed at unraveling the mechanisms that regulate the seasonal variation in GEP across a network of eight European peatlands. Therefore, we described phenology with canopy greenness derived from digital repeat photography and disentangled the effects of radiation, temperature and phenology on GEP with commonality analysis and structural equation modeling. The resulting relational network could not only delineate direct effects but also accounted for possible effect combinations such as interdependencies (mediation) and interactions (moderation). We found that peatland GEP was controlled by the same mechanisms across all sites: phenology constituted a key predictor for the seasonal variation in GEP and further acted as a distinct mediator for temperature and radiation effects on GEP. In particular, the effect of air temperature on GEP was fully mediated through phenology, implying that direct temperature effects representing the thermoregulation of photosynthesis were negligible. The tight coupling between temperature, phenology and GEP applied especially to high latitude and high altitude peatlands and during phenological transition phases. Our study highlights the importance of phenological effects when evaluating the future response of peatland GEP to climate change. Climate change will affect peatland GEP especially through changing temperature patterns during plant phenologically sensitive phases in high latitude and high altitude regions.

OriginalsprogEngelsk
TidsskriftGlobal Change Biology
Vol/bind26
Nummer2
Sider (fra-til)876-887
Antal sider12
ISSN1354-1013
DOI
StatusUdgivet - feb. 2020

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