MycorrhizaeV1, Main, Exploration, bibRecord, 003261

Increased ectomycorrhizal fungal abundance after long-term fertilization and warming of two arctic tundra ecosystems.

Identifieur interne : 003261 ( Main/Exploration ); précédent : 003260; suivant : 003262

Increased ectomycorrhizal fungal abundance after long-term fertilization and warming of two arctic tundra ecosystems.

Auteurs : Karina E. Clemmensen [Danemark] ; Anders Michelsen ; Sven Jonasson ; Gaius R. Shaver

Source :

The New phytologist [ 0028-646X ] ; 2006.

RBID : pubmed:16866945

Descripteurs français

KwdFr :
- Betula (physiologie), Biomasse (MeSH), Climat froid (MeSH), Engrais (MeSH), Microbiologie du sol (MeSH), Mycelium (croissance et développement), Mycorhizes (croissance et développement), Mycorhizes (métabolisme), Racines de plante (physiologie), Régions arctiques (MeSH), Salix (physiologie), Sol (MeSH), Symbiose (MeSH), Température élevée (MeSH), Écosystème (MeSH).
MESH :
- croissance et développement : Mycelium, Mycorhizes.
- métabolisme : Mycorhizes.
- physiologie : Betula, Racines de plante, Salix.
- Biomasse, Climat froid, Engrais, Microbiologie du sol, Régions arctiques, Sol, Symbiose, Température élevée, Écosystème.

English descriptors

KwdEn :
- Arctic Regions (MeSH), Betula (physiology), Biomass (MeSH), Cold Climate (MeSH), Ecosystem (MeSH), Fertilizers (MeSH), Hot Temperature (MeSH), Mycelium (growth & development), Mycorrhizae (growth & development), Mycorrhizae (metabolism), Plant Roots (physiology), Salix (physiology), Soil (MeSH), Soil Microbiology (MeSH), Symbiosis (MeSH).
MESH :
- chemical : Fertilizers, Soil.
- growth & development : Mycelium, Mycorrhizae.
- metabolism : Mycorrhizae.
- physiology : Betula, Plant Roots, Salix.
- Arctic Regions, Biomass, Cold Climate, Ecosystem, Hot Temperature, Soil Microbiology, Symbiosis.

Abstract

Shrub abundance is expected to increase with enhanced temperature and nutrient availability in the Arctic, and associated changes in abundance of ectomycorrhizal (EM) fungi could be a key link between plant responses and longer-term changes in soil organic matter storage. This study quantifies the response in EM fungal abundance to long-term warming and fertilization in two arctic ecosystems with contrasting responses of the EM shrub Betula nana. Ergosterol was used as a biomarker for living fungal biomass in roots and organic soil and ingrowth bags were used to estimate EM mycelial production. We measured 15N and 13C natural abundance to identify the EM-saprotrophic divide in fungal sporocarps and to validate the EM origin of mycelia in the ingrowth bags. Fungal biomass in soil and EM mycelial production increased with fertilization at both tundra sites, and with warming at one site. This was caused partly by increased dominance of EM plants and partly by stimulation of EM mycelial growth. We conclude that cycling of carbon and nitrogen through EM fungi will increase when strongly nutrient-limited arctic ecosystems are exposed to a warmer and more nutrient-rich environment. This has potential consequences for below-ground litter quality and quantity, and for accumulation of organic matter in arctic soils.

DOI: 10.1111/j.1469-8137.2006.01778.x
PubMed: 16866945

Affiliations:

Danemark

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Le document en format XML

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<author><name sortKey="Clemmensen, Karina E" sort="Clemmensen, Karina E" uniqKey="Clemmensen K" first="Karina E" last="Clemmensen">Karina E. Clemmensen</name>
<affiliation wicri:level="1"><nlm:affiliation>Department of Terrestrial Ecology, Institute of Biology, University of Copenhagen, Oester Farimagsgade 2D, DK-1353 Copenhagen K, Denmark. karinac@bi.ku.dk</nlm:affiliation>
<country xml:lang="fr">Danemark</country>
<wicri:regionArea>Department of Terrestrial Ecology, Institute of Biology, University of Copenhagen, Oester Farimagsgade 2D, DK-1353 Copenhagen K</wicri:regionArea>
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<author><name sortKey="Michelsen, Anders" sort="Michelsen, Anders" uniqKey="Michelsen A" first="Anders" last="Michelsen">Anders Michelsen</name>
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<author><name sortKey="Jonasson, Sven" sort="Jonasson, Sven" uniqKey="Jonasson S" first="Sven" last="Jonasson">Sven Jonasson</name>
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<author><name sortKey="Shaver, Gaius R" sort="Shaver, Gaius R" uniqKey="Shaver G" first="Gaius R" last="Shaver">Gaius R. Shaver</name>
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<term>Biomass (MeSH)</term>
<term>Cold Climate (MeSH)</term>
<term>Ecosystem (MeSH)</term>
<term>Fertilizers (MeSH)</term>
<term>Hot Temperature (MeSH)</term>
<term>Mycelium (growth & development)</term>
<term>Mycorrhizae (growth & development)</term>
<term>Mycorrhizae (metabolism)</term>
<term>Plant Roots (physiology)</term>
<term>Salix (physiology)</term>
<term>Soil (MeSH)</term>
<term>Soil Microbiology (MeSH)</term>
<term>Symbiosis (MeSH)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Betula (physiologie)</term>
<term>Biomasse (MeSH)</term>
<term>Climat froid (MeSH)</term>
<term>Engrais (MeSH)</term>
<term>Microbiologie du sol (MeSH)</term>
<term>Mycelium (croissance et développement)</term>
<term>Mycorhizes (croissance et développement)</term>
<term>Mycorhizes (métabolisme)</term>
<term>Racines de plante (physiologie)</term>
<term>Régions arctiques (MeSH)</term>
<term>Salix (physiologie)</term>
<term>Sol (MeSH)</term>
<term>Symbiose (MeSH)</term>
<term>Température élevée (MeSH)</term>
<term>Écosystème (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" xml:lang="en"><term>Fertilizers</term>
<term>Soil</term>
</keywords>
<keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Mycelium</term>
<term>Mycorhizes</term>
</keywords>
<keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Mycelium</term>
<term>Mycorrhizae</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Mycorrhizae</term>
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<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Mycorhizes</term>
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<term>Racines de plante</term>
<term>Salix</term>
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<term>Plant Roots</term>
<term>Salix</term>
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<term>Biomass</term>
<term>Cold Climate</term>
<term>Ecosystem</term>
<term>Hot Temperature</term>
<term>Soil Microbiology</term>
<term>Symbiosis</term>
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<keywords scheme="MESH" xml:lang="fr"><term>Biomasse</term>
<term>Climat froid</term>
<term>Engrais</term>
<term>Microbiologie du sol</term>
<term>Régions arctiques</term>
<term>Sol</term>
<term>Symbiose</term>
<term>Température élevée</term>
<term>Écosystème</term>
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<front><div type="abstract" xml:lang="en">Shrub abundance is expected to increase with enhanced temperature and nutrient availability in the Arctic, and associated changes in abundance of ectomycorrhizal (EM) fungi could be a key link between plant responses and longer-term changes in soil organic matter storage. This study quantifies the response in EM fungal abundance to long-term warming and fertilization in two arctic ecosystems with contrasting responses of the EM shrub Betula nana. Ergosterol was used as a biomarker for living fungal biomass in roots and organic soil and ingrowth bags were used to estimate EM mycelial production. We measured 15N and 13C natural abundance to identify the EM-saprotrophic divide in fungal sporocarps and to validate the EM origin of mycelia in the ingrowth bags. Fungal biomass in soil and EM mycelial production increased with fertilization at both tundra sites, and with warming at one site. This was caused partly by increased dominance of EM plants and partly by stimulation of EM mycelial growth. We conclude that cycling of carbon and nitrogen through EM fungi will increase when strongly nutrient-limited arctic ecosystems are exposed to a warmer and more nutrient-rich environment. This has potential consequences for below-ground litter quality and quantity, and for accumulation of organic matter in arctic soils.</div>
</front>
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<Month>09</Month>
<Day>14</Day>
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<Abstract><AbstractText>Shrub abundance is expected to increase with enhanced temperature and nutrient availability in the Arctic, and associated changes in abundance of ectomycorrhizal (EM) fungi could be a key link between plant responses and longer-term changes in soil organic matter storage. This study quantifies the response in EM fungal abundance to long-term warming and fertilization in two arctic ecosystems with contrasting responses of the EM shrub Betula nana. Ergosterol was used as a biomarker for living fungal biomass in roots and organic soil and ingrowth bags were used to estimate EM mycelial production. We measured 15N and 13C natural abundance to identify the EM-saprotrophic divide in fungal sporocarps and to validate the EM origin of mycelia in the ingrowth bags. Fungal biomass in soil and EM mycelial production increased with fertilization at both tundra sites, and with warming at one site. This was caused partly by increased dominance of EM plants and partly by stimulation of EM mycelial growth. We conclude that cycling of carbon and nitrogen through EM fungi will increase when strongly nutrient-limited arctic ecosystems are exposed to a warmer and more nutrient-rich environment. This has potential consequences for below-ground litter quality and quantity, and for accumulation of organic matter in arctic soils.</AbstractText>
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<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Clemmensen</LastName>
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<country name="Danemark"><noRegion><name sortKey="Clemmensen, Karina E" sort="Clemmensen, Karina E" uniqKey="Clemmensen K" first="Karina E" last="Clemmensen">Karina E. Clemmensen</name>
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Increased ectomycorrhizal fungal abundance after long-term fertilization and warming of two arctic tundra ecosystems.

Increased ectomycorrhizal fungal abundance after long-term fertilization and warming of two arctic tundra ecosystems.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki