Atmospheric nitrogen deposition impacts on the structure and function of forest mycorrhizal communities: A review.
Identifieur interne : 000638 ( Main/Corpus ); précédent : 000637; suivant : 000639Atmospheric nitrogen deposition impacts on the structure and function of forest mycorrhizal communities: A review.
Auteurs : Erik A. Lilleskov ; Thomas W. Kuyper ; Martin I. Bidartondo ; Erik A. HobbieSource :
- Environmental pollution (Barking, Essex : 1987) [ 1873-6424 ] ; 2019.
English descriptors
- KwdEn :
- Biomass (MeSH), Carbon (metabolism), Ecosystem (MeSH), Forests (MeSH), Mycorrhizae (classification), Mycorrhizae (growth & development), Mycorrhizae (metabolism), Mycorrhizae (physiology), Nitrogen (metabolism), Phosphorus (metabolism), Soil (chemistry), Soil Microbiology (MeSH), Trees (microbiology).
- MESH :
- chemical , chemistry : Soil.
- chemical , metabolism : Carbon, Nitrogen, Phosphorus.
- classification : Mycorrhizae.
- growth & development : Mycorrhizae.
- metabolism : Mycorrhizae.
- microbiology : Trees.
- physiology : Mycorrhizae.
- Biomass, Ecosystem, Forests, Soil Microbiology.
Abstract
Humans have dramatically increased atmospheric nitrogen (N) deposition globally. At the coarsest resolution, N deposition is correlated with shifts from ectomycorrhizal (EcM) to arbuscular mycorrhizal (AM) tree dominance. At finer resolution, ectomycorrhizal fungal (EcMF) and arbuscular mycorrhizal fungal (AMF) communities respond strongly to long-term N deposition with the disappearance of key taxa. Conifer-associated EcMF are more sensitive than other EcMF, with current estimates of critical loads at 5-6 kg ha-1 yr-1 for the former and 10-20 kg ha-1 yr-1 for the latter. Where loads are exceeded, strong plant-soil and microbe-soil feedbacks may slow recovery rates after abatement of N deposition. Critical loads for AMF and tropical EcMF require additional study. In general, the responses of EcMF to N deposition are better understood than those of AMF because of methodological tractability. Functional consequences of EcMF community change are linked to decreases by fungi with medium-distance exploration strategies, hydrophobic walls, proteolytic capacity, and perhaps peroxidases for acquiring N from soil organic matter. These functional losses may contribute to declines in forest floor decomposition under N deposition. For AMF, limited capacity to directly access complexed organic N may reduce functional consequences, but research is needed to test this hypothesis. Mycorrhizal biomass often declines with N deposition, but the relative contributions of alternate mechanisms for this decline (lower C supply, higher C cost, physiological stress by N) have not been quantified. Furthermore, fungal biomass and functional responses to N inputs probably depend on ecosystem P status, yet how N deposition-induced P limitation interacts with belowground C flux and mycorrhizal community structure and function is still unclear. Current 'omic analyses indicate potential functional differences among fungal lineages and should be integrated with studies of physiology, host nutrition, growth and health, fungal and plant community structure, and ecosystem processes.
DOI: 10.1016/j.envpol.2018.11.074
PubMed: 30543941
Links to Exploration step
pubmed:30543941Le document en format XML
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<author><name sortKey="Lilleskov, Erik A" sort="Lilleskov, Erik A" uniqKey="Lilleskov E" first="Erik A" last="Lilleskov">Erik A. Lilleskov</name>
<affiliation><nlm:affiliation>Forestry Sciences Laboratory, USDA Forest Service, Northern Research Station, 410 MacInnes Dr, Houghton, MI, 49931, USA. Electronic address: elilleskov@fs.fed.us.</nlm:affiliation>
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<author><name sortKey="Kuyper, Thomas W" sort="Kuyper, Thomas W" uniqKey="Kuyper T" first="Thomas W" last="Kuyper">Thomas W. Kuyper</name>
<affiliation><nlm:affiliation>Soil Biology Group, Wageningen University and Research, Droevendaalsesteeg 3, NL-6708 PB, Wageningen, Netherlands. Electronic address: Thom.Kuyper@wur.nl.</nlm:affiliation>
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<author><name sortKey="Bidartondo, Martin I" sort="Bidartondo, Martin I" uniqKey="Bidartondo M" first="Martin I" last="Bidartondo">Martin I. Bidartondo</name>
<affiliation><nlm:affiliation>Department of Life Sciences, Imperial College London, London, SW7 2AZ, England, UK; Comparative Plant & Fungal Biology, Royal Botanic Gardens, Kew, Richmond, TW9 3DS, England, UK. Electronic address: m.bidartondo@imperial.ac.uk.</nlm:affiliation>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biomass (MeSH)</term>
<term>Carbon (metabolism)</term>
<term>Ecosystem (MeSH)</term>
<term>Forests (MeSH)</term>
<term>Mycorrhizae (classification)</term>
<term>Mycorrhizae (growth & development)</term>
<term>Mycorrhizae (metabolism)</term>
<term>Mycorrhizae (physiology)</term>
<term>Nitrogen (metabolism)</term>
<term>Phosphorus (metabolism)</term>
<term>Soil (chemistry)</term>
<term>Soil Microbiology (MeSH)</term>
<term>Trees (microbiology)</term>
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<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Soil</term>
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<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon</term>
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<front><div type="abstract" xml:lang="en">Humans have dramatically increased atmospheric nitrogen (N) deposition globally. At the coarsest resolution, N deposition is correlated with shifts from ectomycorrhizal (EcM) to arbuscular mycorrhizal (AM) tree dominance. At finer resolution, ectomycorrhizal fungal (EcMF) and arbuscular mycorrhizal fungal (AMF) communities respond strongly to long-term N deposition with the disappearance of key taxa. Conifer-associated EcMF are more sensitive than other EcMF, with current estimates of critical loads at 5-6 kg ha<sup>-1</sup>
yr<sup>-1</sup>
for the former and 10-20 kg ha<sup>-1</sup>
yr<sup>-1</sup>
for the latter. Where loads are exceeded, strong plant-soil and microbe-soil feedbacks may slow recovery rates after abatement of N deposition. Critical loads for AMF and tropical EcMF require additional study. In general, the responses of EcMF to N deposition are better understood than those of AMF because of methodological tractability. Functional consequences of EcMF community change are linked to decreases by fungi with medium-distance exploration strategies, hydrophobic walls, proteolytic capacity, and perhaps peroxidases for acquiring N from soil organic matter. These functional losses may contribute to declines in forest floor decomposition under N deposition. For AMF, limited capacity to directly access complexed organic N may reduce functional consequences, but research is needed to test this hypothesis. Mycorrhizal biomass often declines with N deposition, but the relative contributions of alternate mechanisms for this decline (lower C supply, higher C cost, physiological stress by N) have not been quantified. Furthermore, fungal biomass and functional responses to N inputs probably depend on ecosystem P status, yet how N deposition-induced P limitation interacts with belowground C flux and mycorrhizal community structure and function is still unclear. Current 'omic analyses indicate potential functional differences among fungal lineages and should be integrated with studies of physiology, host nutrition, growth and health, fungal and plant community structure, and ecosystem processes.</div>
</front>
</TEI>
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<Abstract><AbstractText>Humans have dramatically increased atmospheric nitrogen (N) deposition globally. At the coarsest resolution, N deposition is correlated with shifts from ectomycorrhizal (EcM) to arbuscular mycorrhizal (AM) tree dominance. At finer resolution, ectomycorrhizal fungal (EcMF) and arbuscular mycorrhizal fungal (AMF) communities respond strongly to long-term N deposition with the disappearance of key taxa. Conifer-associated EcMF are more sensitive than other EcMF, with current estimates of critical loads at 5-6 kg ha<sup>-1</sup>
yr<sup>-1</sup>
for the former and 10-20 kg ha<sup>-1</sup>
yr<sup>-1</sup>
for the latter. Where loads are exceeded, strong plant-soil and microbe-soil feedbacks may slow recovery rates after abatement of N deposition. Critical loads for AMF and tropical EcMF require additional study. In general, the responses of EcMF to N deposition are better understood than those of AMF because of methodological tractability. Functional consequences of EcMF community change are linked to decreases by fungi with medium-distance exploration strategies, hydrophobic walls, proteolytic capacity, and perhaps peroxidases for acquiring N from soil organic matter. These functional losses may contribute to declines in forest floor decomposition under N deposition. For AMF, limited capacity to directly access complexed organic N may reduce functional consequences, but research is needed to test this hypothesis. Mycorrhizal biomass often declines with N deposition, but the relative contributions of alternate mechanisms for this decline (lower C supply, higher C cost, physiological stress by N) have not been quantified. Furthermore, fungal biomass and functional responses to N inputs probably depend on ecosystem P status, yet how N deposition-induced P limitation interacts with belowground C flux and mycorrhizal community structure and function is still unclear. Current 'omic analyses indicate potential functional differences among fungal lineages and should be integrated with studies of physiology, host nutrition, growth and health, fungal and plant community structure, and ecosystem processes.</AbstractText>
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