Evaluating the effects of terrestrial ecosystems, climate and carbon dioxide on weathering over geological time: a global-scale process-based approach.
Identifieur interne : 002103 ( Main/Corpus ); précédent : 002102; suivant : 002104Evaluating the effects of terrestrial ecosystems, climate and carbon dioxide on weathering over geological time: a global-scale process-based approach.
Auteurs : Lyla L. Taylor ; Steve A. Banwart ; Paul J. Valdes ; Jonathan R. Leake ; David J. BeerlingSource :
- Philosophical transactions of the Royal Society of London. Series B, Biological sciences [ 1471-2970 ] ; 2012.
English descriptors
- KwdEn :
- Carbon Cycle (MeSH), Carbon Dioxide (chemistry), Climate Change (MeSH), Computer Simulation (MeSH), Earth, Planet (MeSH), Ecosystem (MeSH), Geological Phenomena (MeSH), Hyphae (chemistry), Minerals (chemistry), Models, Biological (MeSH), Mycorrhizae (chemistry), Plant Roots (chemistry), Rhizosphere (MeSH), Soil (chemistry), Soil Microbiology (MeSH), Time Factors (MeSH), Trees (chemistry), Water (chemistry).
- MESH :
- chemical , chemistry : Carbon Dioxide, Minerals, Soil, Water.
- chemistry : Hyphae, Mycorrhizae, Plant Roots, Trees.
- Carbon Cycle, Climate Change, Computer Simulation, Earth, Planet, Ecosystem, Geological Phenomena, Models, Biological, Rhizosphere, Soil Microbiology, Time Factors.
Abstract
Global weathering of calcium and magnesium silicate rocks provides the long-term sink for atmospheric carbon dioxide (CO(2)) on a timescale of millions of years by causing precipitation of calcium carbonates on the seafloor. Catchment-scale field studies consistently indicate that vegetation increases silicate rock weathering, but incorporating the effects of trees and fungal symbionts into geochemical carbon cycle models has relied upon simple empirical scaling functions. Here, we describe the development and application of a process-based approach to deriving quantitative estimates of weathering by plant roots, associated symbiotic mycorrhizal fungi and climate. Our approach accounts for the influence of terrestrial primary productivity via nutrient uptake on soil chemistry and mineral weathering, driven by simulations using a dynamic global vegetation model coupled to an ocean-atmosphere general circulation model of the Earth's climate. The strategy is successfully validated against observations of weathering in watersheds around the world, indicating that it may have some utility when extrapolated into the past. When applied to a suite of six global simulations from 215 to 50 Ma, we find significantly larger effects over the past 220 Myr relative to the present day. Vegetation and mycorrhizal fungi enhanced climate-driven weathering by a factor of up to 2. Overall, we demonstrate a more realistic process-based treatment of plant fungal-geosphere interactions at the global scale, which constitutes a first step towards developing 'next-generation' geochemical models.
DOI: 10.1098/rstb.2011.0251
PubMed: 22232768
PubMed Central: PMC3248708
Links to Exploration step
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Leake</name></author><author><name sortKey="Beerling, David J" sort="Beerling, David J" uniqKey="Beerling D" first="David J" last="Beerling">David J. Beerling</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2012">2012</date><idno type="RBID">pubmed:22232768</idno><idno type="pmid">22232768</idno><idno type="doi">10.1098/rstb.2011.0251</idno><idno type="pmc">PMC3248708</idno><idno type="wicri:Area/Main/Corpus">002103</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">002103</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Evaluating the effects of terrestrial ecosystems, climate and carbon dioxide on weathering over geological time: a global-scale process-based approach.</title><author><name sortKey="Taylor, Lyla L" sort="Taylor, Lyla L" uniqKey="Taylor L" first="Lyla L" last="Taylor">Lyla L. Taylor</name><affiliation><nlm:affiliation>Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK. l.l.taylor@sheffield.ac.uk</nlm:affiliation></affiliation></author><author><name sortKey="Banwart, Steve A" sort="Banwart, Steve A" uniqKey="Banwart S" first="Steve A" last="Banwart">Steve A. Banwart</name></author><author><name sortKey="Valdes, Paul J" sort="Valdes, Paul J" uniqKey="Valdes P" first="Paul J" last="Valdes">Paul J. Valdes</name></author><author><name sortKey="Leake, Jonathan R" sort="Leake, Jonathan R" uniqKey="Leake J" first="Jonathan R" last="Leake">Jonathan R. Leake</name></author><author><name sortKey="Beerling, David J" sort="Beerling, David J" uniqKey="Beerling D" first="David J" last="Beerling">David J. Beerling</name></author></analytic><series><title level="j">Philosophical transactions of the Royal Society of London. Series B, Biological sciences</title><idno type="eISSN">1471-2970</idno><imprint><date when="2012" type="published">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Carbon Cycle (MeSH)</term><term>Carbon Dioxide (chemistry)</term><term>Climate Change (MeSH)</term><term>Computer Simulation (MeSH)</term><term>Earth, Planet (MeSH)</term><term>Ecosystem (MeSH)</term><term>Geological Phenomena (MeSH)</term><term>Hyphae (chemistry)</term><term>Minerals (chemistry)</term><term>Models, Biological (MeSH)</term><term>Mycorrhizae (chemistry)</term><term>Plant Roots (chemistry)</term><term>Rhizosphere (MeSH)</term><term>Soil (chemistry)</term><term>Soil Microbiology (MeSH)</term><term>Time Factors (MeSH)</term><term>Trees (chemistry)</term><term>Water (chemistry)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Carbon Dioxide</term><term>Minerals</term><term>Soil</term><term>Water</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Hyphae</term><term>Mycorrhizae</term><term>Plant Roots</term><term>Trees</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Carbon Cycle</term><term>Climate Change</term><term>Computer Simulation</term><term>Earth, Planet</term><term>Ecosystem</term><term>Geological Phenomena</term><term>Models, Biological</term><term>Rhizosphere</term><term>Soil Microbiology</term><term>Time Factors</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Global weathering of calcium and magnesium silicate rocks provides the long-term sink for atmospheric carbon dioxide (CO(2)) on a timescale of millions of years by causing precipitation of calcium carbonates on the seafloor. Catchment-scale field studies consistently indicate that vegetation increases silicate rock weathering, but incorporating the effects of trees and fungal symbionts into geochemical carbon cycle models has relied upon simple empirical scaling functions. Here, we describe the development and application of a process-based approach to deriving quantitative estimates of weathering by plant roots, associated symbiotic mycorrhizal fungi and climate. Our approach accounts for the influence of terrestrial primary productivity via nutrient uptake on soil chemistry and mineral weathering, driven by simulations using a dynamic global vegetation model coupled to an ocean-atmosphere general circulation model of the Earth's climate. The strategy is successfully validated against observations of weathering in watersheds around the world, indicating that it may have some utility when extrapolated into the past. When applied to a suite of six global simulations from 215 to 50 Ma, we find significantly larger effects over the past 220 Myr relative to the present day. Vegetation and mycorrhizal fungi enhanced climate-driven weathering by a factor of up to 2. Overall, we demonstrate a more realistic process-based treatment of plant fungal-geosphere interactions at the global scale, which constitutes a first step towards developing 'next-generation' geochemical models.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">22232768</PMID><DateCompleted><Year>2012</Year><Month>04</Month><Day>26</Day></DateCompleted><DateRevised><Year>2019</Year><Month>12</Month><Day>10</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1471-2970</ISSN><JournalIssue CitedMedium="Internet"><Volume>367</Volume><Issue>1588</Issue><PubDate><Year>2012</Year><Month>Feb</Month><Day>19</Day></PubDate></JournalIssue><Title>Philosophical transactions of the Royal Society of London. Series B, Biological sciences</Title><ISOAbbreviation>Philos Trans R Soc Lond B Biol Sci</ISOAbbreviation></Journal><ArticleTitle>Evaluating the effects of terrestrial ecosystems, climate and carbon dioxide on weathering over geological time: a global-scale process-based approach.</ArticleTitle><Pagination><MedlinePgn>565-82</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1098/rstb.2011.0251</ELocationID><Abstract><AbstractText>Global weathering of calcium and magnesium silicate rocks provides the long-term sink for atmospheric carbon dioxide (CO(2)) on a timescale of millions of years by causing precipitation of calcium carbonates on the seafloor. Catchment-scale field studies consistently indicate that vegetation increases silicate rock weathering, but incorporating the effects of trees and fungal symbionts into geochemical carbon cycle models has relied upon simple empirical scaling functions. Here, we describe the development and application of a process-based approach to deriving quantitative estimates of weathering by plant roots, associated symbiotic mycorrhizal fungi and climate. Our approach accounts for the influence of terrestrial primary productivity via nutrient uptake on soil chemistry and mineral weathering, driven by simulations using a dynamic global vegetation model coupled to an ocean-atmosphere general circulation model of the Earth's climate. The strategy is successfully validated against observations of weathering in watersheds around the world, indicating that it may have some utility when extrapolated into the past. When applied to a suite of six global simulations from 215 to 50 Ma, we find significantly larger effects over the past 220 Myr relative to the present day. Vegetation and mycorrhizal fungi enhanced climate-driven weathering by a factor of up to 2. 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