The effects of psammophilous plants on sand dune dynamics
Identifieur interne : 001E14 ( Main/Exploration ); précédent : 001E13; suivant : 001E15The effects of psammophilous plants on sand dune dynamics
Auteurs : Golan Bel [Israël] ; Yosef Ashkenazy [Israël]Source :
- Journal of Geophysical Research: Earth Surface [ 2169-9003 ] ; 2014-07.
Abstract
Mathematical models of sand dune dynamics have considered different types of sand dune cover. However, despite the important role of psammophilous plants (plants that flourish in moving‐sand environments) in dune dynamics, the incorporation of their effects into mathematical models of sand dunes remains a challenging task. Here we propose a nonlinear physical model for the role of psammophilous plants in the stabilization and destabilization of sand dunes. There are two main mechanisms by which the wind affects these plants: (i) sand drift results in the burial and exposure of plants, a process that is known to result in an enhanced growth rate, and (ii) strong winds remove shoots and rhizomes and seed them in nearby locations, enhancing their growth rate. Our model describes the temporal evolution of the fractions of surface cover of regular vegetation, biogenic soil crust, and psammophilous plants. The latter reach their optimal growth under either (i) specific sand drift or (ii) specific wind power. The model exhibits complex bifurcation diagrams and dynamics, which explain observed phenomena, and it predicts new dune stabilization scenarios. Depending on the climatological conditions, it is possible to obtain one, two, or, predicted here for the first time, three stable dune states. Our model shows that the development of the different cover types depends on the precipitation rate and the wind power and that the psammophilous plants are not always the first to grow and stabilize the dunes.
Url:
DOI: 10.1002/2014JF003170
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 002C76
- to stream Istex, to step Curation: 002C76
- to stream Istex, to step Checkpoint: 000024
- to stream Main, to step Merge: 001E21
- to stream Main, to step Curation: 001E14
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">The effects of psammophilous plants on sand dune dynamics</title><author><name sortKey="Bel, Golan" sort="Bel, Golan" uniqKey="Bel G" first="Golan" last="Bel">Golan Bel</name></author><author><name sortKey="Ashkenazy, Yosef" sort="Ashkenazy, Yosef" uniqKey="Ashkenazy Y" first="Yosef" last="Ashkenazy">Yosef Ashkenazy</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:5ADC7677422A025C41900582E8D86C5C2A43A72E</idno><date when="2014" year="2014">2014</date><idno type="doi">10.1002/2014JF003170</idno><idno type="url">https://api.istex.fr/document/5ADC7677422A025C41900582E8D86C5C2A43A72E/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002C76</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">002C76</idno><idno type="wicri:Area/Istex/Curation">002C76</idno><idno type="wicri:Area/Istex/Checkpoint">000024</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000024</idno><idno type="wicri:doubleKey">2169-9003:2014:Bel G:the:effects:of</idno><idno type="wicri:Area/Main/Merge">001E21</idno><idno type="wicri:Area/Main/Curation">001E14</idno><idno type="wicri:Area/Main/Exploration">001E14</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main">The effects of psammophilous plants on sand dune dynamics</title><author><name sortKey="Bel, Golan" sort="Bel, Golan" uniqKey="Bel G" first="Golan" last="Bel">Golan Bel</name><affiliation wicri:level="1"><country xml:lang="fr">Israël</country><wicri:regionArea>Department of Environmental Physics, Blaustein Institutes for Desert Research, Ben‐Gurion University of the Negev, Sede Boqer Campus</wicri:regionArea><wicri:noRegion>Sede Boqer Campus</wicri:noRegion></affiliation><affiliation></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Israël</country></affiliation></author><author><name sortKey="Ashkenazy, Yosef" sort="Ashkenazy, Yosef" uniqKey="Ashkenazy Y" first="Yosef" last="Ashkenazy">Yosef Ashkenazy</name><affiliation wicri:level="1"><country xml:lang="fr">Israël</country><wicri:regionArea>Department of Environmental Physics, Blaustein Institutes for Desert Research, Ben‐Gurion University of the Negev, Sede Boqer Campus</wicri:regionArea><wicri:noRegion>Sede Boqer Campus</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Journal of Geophysical Research: Earth Surface</title><title level="j" type="alt">JOURNAL OF GEOPHYSICAL RESEARCH: EARTH SURFACE</title><idno type="ISSN">2169-9003</idno><idno type="eISSN">2169-9011</idno><imprint><biblScope unit="vol">119</biblScope><biblScope unit="issue">7</biblScope><biblScope unit="page" from="1636">1636</biblScope><biblScope unit="page" to="1650">1650</biblScope><biblScope unit="page-count">8</biblScope><date type="published" when="2014-07">2014-07</date></imprint><idno type="ISSN">2169-9003</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">2169-9003</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract">Mathematical models of sand dune dynamics have considered different types of sand dune cover. However, despite the important role of psammophilous plants (plants that flourish in moving‐sand environments) in dune dynamics, the incorporation of their effects into mathematical models of sand dunes remains a challenging task. Here we propose a nonlinear physical model for the role of psammophilous plants in the stabilization and destabilization of sand dunes. There are two main mechanisms by which the wind affects these plants: (i) sand drift results in the burial and exposure of plants, a process that is known to result in an enhanced growth rate, and (ii) strong winds remove shoots and rhizomes and seed them in nearby locations, enhancing their growth rate. Our model describes the temporal evolution of the fractions of surface cover of regular vegetation, biogenic soil crust, and psammophilous plants. The latter reach their optimal growth under either (i) specific sand drift or (ii) specific wind power. The model exhibits complex bifurcation diagrams and dynamics, which explain observed phenomena, and it predicts new dune stabilization scenarios. Depending on the climatological conditions, it is possible to obtain one, two, or, predicted here for the first time, three stable dune states. Our model shows that the development of the different cover types depends on the precipitation rate and the wind power and that the psammophilous plants are not always the first to grow and stabilize the dunes.</div></front></TEI><affiliations><list><country><li>Israël</li></country></list><tree><country name="Israël"><noRegion><name sortKey="Bel, Golan" sort="Bel, Golan" uniqKey="Bel G" first="Golan" last="Bel">Golan Bel</name></noRegion><name sortKey="Ashkenazy, Yosef" sort="Ashkenazy, Yosef" uniqKey="Ashkenazy Y" first="Yosef" last="Ashkenazy">Yosef Ashkenazy</name><name sortKey="Bel, Golan" sort="Bel, Golan" uniqKey="Bel G" first="Golan" last="Bel">Golan Bel</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Santé/explor/EdenteV2/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001E14 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001E14 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Santé
|area= EdenteV2
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:5ADC7677422A025C41900582E8D86C5C2A43A72E
|texte= The effects of psammophilous plants on sand dune dynamics
}}
| This area was generated with Dilib version V0.6.32. |  |