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Carbon use efficien...
Carbon use efficiency of mycorrhizal fungal mycelium increases during the growing season but decreases with forest age across a Pinus sylvestris chronosequence
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- Hagenbo, Andreas, 1987- (författare)
- Sveriges lantbruksuniversitet,Örebro universitet,Swedish University of Agricultural Sciences,Örebro University,Institutionen för naturvetenskap och teknik,Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
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- Hadden, David (författare)
- Sveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden,Institutionen för ekologi
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- Engelbrecht Clemmensen, Karina (författare)
- Sveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
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- Grelle, Achim (författare)
- Sveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden,Institutionen för ekologi
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- Manzoni, Stefano (författare)
- Stockholms universitet,Stockholm University,Department of Physical Geography, Stockholm University, Stockholm, Sweden; Bolin Centre for Climate Research, Stockholm, Sweden,Institutionen för naturgeografi
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- Mölder, Meelis (författare)
- Lund University,Lunds universitet,ICOS Sweden,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science,Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
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- Ekblad, Alf, 1957- (författare)
- Örebro universitet,Örebro University,Institutionen för naturvetenskap och teknik
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- Fransson, Petra (författare)
- Sveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
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(creator_code:org_t)
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- 2019-06-22
- 2019
- Engelska.
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Ingår i: Journal of Ecology. - : Wiley. - 0022-0477 .- 1365-2745. ; 107:6, s. 2808-2822
- Relaterad länk:
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http://dx.doi.org/10...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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https://res.slu.se/i...
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Abstract
Ämnesord
Stäng
- In boreal forest soils, mycelium of mycorrhizal fungi is pivotal for regulating soil carbon (C) cycling and storage. The carbon use efficiency (CUE), a key parameter in C cycling models, can inform on the partitioning of C between microbial biomass, and potential soil storage, and respiration. Here, we test the dependency of mycorrhizal mycelial CUE on stand age and seasonality in managed boreal forest stands. Based on mycelial production and respiration estimates, derived from sequentially incubated ingrowth mesh bags, we estimated CUE on an ecosystem scale during a seasonal cycle and across a chronosequence of eight, 12- to 158-year-old, managed Pinus sylvestris forest stands characterized by decreasing pH and nitrogen (N) availability with increasing age. Mycelial respiration was related to total soil respiration, and by using eddy covariance flux measurements, primary production (GPP) was estimated in the 12- and 100-year-old forests, and related to mycelial respiration and CUE. As hypothesized, mycelial CUE decreased significantly with increasing forest age by c. 65%, supposedly related to a shift in mycorrhizal community composition and a metabolic adjustment reducing their own biomass N demand with declining soil N availability. Furthermore, mycelial CUE increased by a factor of five over the growing season; from 0.03 in May to 0.15 in November, and we propose that the seasonal change in CUE is regulated by a decrease in photosynthate production and temperature. The respiratory contribution of mycorrhizal mycelium ranged from 14% to 26% of total soil respiration, and was on average 17% across all sites and occasions. Synthesis. Carbon is retained more efficiently in mycorrhizal mycelium late in the growing season, when fungi have access to a more balanced C and nutrient supplies. Earlier in the growing season, at maximum host plant photosynthesis, when below-ground C availability is high in relation to N, the fungi respire excess C resulting in lower mycelial carbon use efficiency (CUE). Additionally, C is retained less efficiently in mycorrhizal fungal biomass in older forest stands characterized by more nutrient depleted soils than younger forest stands.
Ämnesord
- NATURVETENSKAP -- Biologi -- Mikrobiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Microbiology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Markvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Soil Science (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- boreal
- carbon use efficiency
- chronosequence
- ectomycorrhizal
- extraradical mycelium
- mycelial biomass
- mycelial respiration
- soil respiration
- boreal
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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