Modeling shrub encroachment in subalpine grasslands under different environmental and management scenarios
Identifieur interne : 001712 ( Main/Exploration ); précédent : 001711; suivant : 001713Modeling shrub encroachment in subalpine grasslands under different environmental and management scenarios
Auteurs : B. Komac [Andorre] ; S. Kefi [France] ; P. Nuche [Espagne] ; J. Escos [Espagne] ; C. L. Alados [Espagne]Source :
- Journal of environmental management [ 0301-4797 ] ; 2013.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Montagne.
English descriptors
- KwdEn :
Abstract
Woody plants are spreading in many alpine and subalpine ecosystems and are expected to continue increasing in response to land abandonment and global warming. This encroachment threatens species diversity, and considerable efforts have been deployed to control it. In this study, we combined a lattice model and field data to investigate the efficiency of different management strategies in controlling shrub encroachment in alpine grasslands. The model parameter values were estimated in the field based on the thorny shrub Echinospartum horridum (erizón) which is currently encroaching in central Spanish Pyrenees. Our study shows that encroachment could accelerate if climate warming continues. Different management scenarios consisting of a gradient of livestock pressures, fire events and mechanical removal were simulated to identify scenarios able to control the expansion of shrubs into grasslands. Our study shows that grazing alone cannot stop encroachment. Rather, a combination of grazing and shrub removal (either by fire or mechanical removal) is needed, and our model can help estimate the frequency and intensities of the shrub removal. This model can be used to investigate the consequences of different management scenarios and environmental variability which could be of practical value in the preservation of alpine grasslands.
Affiliations:
- Andorre, Espagne, France
- Aragon, Languedoc-Roussillon, Occitanie (région administrative)
- Montpellier
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Le document en format XML
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Komac</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Centre d'Estudis de la Neu i la Muntanya d'Andorra (CENMA - IEA), Avinguda Rocafort 21-23, Sant Julià de Lòria</s1><s3>AND</s3><sZ>1 aut.</sZ></inist:fA14><country>Andorre</country><wicri:noRegion>Centre d'Estudis de la Neu i la Muntanya d'Andorra (CENMA - IEA), Avinguda Rocafort 21-23, Sant Julià de Lòria</wicri:noRegion></affiliation></author><author><name sortKey="Kefi, S" sort="Kefi, S" uniqKey="Kefi S" first="S." last="Kefi">S. Kefi</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut des Sciences de l'Evolution, CNRS UMR 5554, Bat 22, Second Floor, Universite de Montpellier II - CC 065</s1><s2>34095 Montpellier</s2><s3>FRA</s3><sZ>2 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Languedoc-Roussillon</region><settlement type="city">Montpellier</settlement></placeName></affiliation></author><author><name sortKey="Nuche, P" sort="Nuche, P" uniqKey="Nuche P" first="P." last="Nuche">P. Nuche</name><affiliation wicri:level="2"><inist:fA14 i1="03"><s1>Pyrenean Institute of Ecology (CSIC), Avda. Montañana 1005, P.O. 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Box 13034</s1><s2>50192 Zaragoza</s2><s3>ESP</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Aragon</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of environmental management</title><title level="j" type="abbreviated">J. environ. manage.</title><idno type="ISSN">0301-4797</idno><imprint><date when="2013">2013</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of environmental management</title><title level="j" type="abbreviated">J. environ. manage.</title><idno type="ISSN">0301-4797</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Afforestation</term><term>Deagriculturization</term><term>Environmental management</term><term>Grassland</term><term>Modeling</term><term>Models</term><term>Mountain</term><term>Pyrenees</term><term>Shrub encroachment</term><term>Vegetation dynamics</term><term>Woody plant</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Modélisation</term><term>Prairie</term><term>Gestion environnement</term><term>Montagne</term><term>Déprise agricole</term><term>Modèle</term><term>Dynamique végétation</term><term>Plante ligneuse</term><term>Pyrénées</term><term>Envahissement par les broussailles</term><term>Extension forestière</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Montagne</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Woody plants are spreading in many alpine and subalpine ecosystems and are expected to continue increasing in response to land abandonment and global warming. This encroachment threatens species diversity, and considerable efforts have been deployed to control it. In this study, we combined a lattice model and field data to investigate the efficiency of different management strategies in controlling shrub encroachment in alpine grasslands. The model parameter values were estimated in the field based on the thorny shrub Echinospartum horridum (erizón) which is currently encroaching in central Spanish Pyrenees. Our study shows that encroachment could accelerate if climate warming continues. Different management scenarios consisting of a gradient of livestock pressures, fire events and mechanical removal were simulated to identify scenarios able to control the expansion of shrubs into grasslands. Our study shows that grazing alone cannot stop encroachment. Rather, a combination of grazing and shrub removal (either by fire or mechanical removal) is needed, and our model can help estimate the frequency and intensities of the shrub removal. This model can be used to investigate the consequences of different management scenarios and environmental variability which could be of practical value in the preservation of alpine grasslands.</div></front></TEI><affiliations><list><country><li>Andorre</li><li>Espagne</li><li>France</li></country><region><li>Aragon</li><li>Languedoc-Roussillon</li><li>Occitanie (région administrative)</li></region><settlement><li>Montpellier</li></settlement></list><tree><country name="Andorre"><noRegion><name sortKey="Komac, B" sort="Komac, B" uniqKey="Komac B" first="B." last="Komac">B. Komac</name></noRegion></country><country name="France"><region name="Occitanie (région administrative)"><name sortKey="Kefi, S" sort="Kefi, S" uniqKey="Kefi S" first="S." last="Kefi">S. Kefi</name></region></country><country name="Espagne"><region name="Aragon"><name sortKey="Nuche, P" sort="Nuche, P" uniqKey="Nuche P" first="P." last="Nuche">P. Nuche</name></region><name sortKey="Alados, C L" sort="Alados, C L" uniqKey="Alados C" first="C. L." last="Alados">C. L. Alados</name><name sortKey="Escos, J" sort="Escos, J" uniqKey="Escos J" first="J." last="Escos">J. Escos</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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