PoplarV1, Main, Exploration, bibRecord, 002B24

Do evergreen and deciduous trees have different effects on net N mineralization in soil?

Identifieur interne : 002B24 ( Main/Exploration ); précédent : 002B23; suivant : 002B25

Do evergreen and deciduous trees have different effects on net N mineralization in soil?

Auteurs : Kevin E. Mueller [États-Unis] ; Sarah E. Hobbie ; Jacek Oleksyn ; Peter B. Reich ; David M. Eissenstat

Source :

Ecology [ 0012-9658 ] ; 2012.

RBID : pubmed:22834386

Descripteurs français

KwdFr :
- Arbres (classification), Arbres (physiologie), Azote (composition chimique), Feuilles de plante (physiologie), Sol (composition chimique).
MESH :
- composition chimique : Arbres, Azote, Sol.
- physiologie : Arbres, Feuilles de plante.

English descriptors

KwdEn :
- Nitrogen (chemistry), Plant Leaves (physiology), Soil (chemistry), Trees (classification), Trees (physiology).
MESH :
- chemical , chemistry : Nitrogen, Soil.
- classification : Trees.
- physiology : Plant Leaves, Trees.

Abstract

Evergreen and deciduous plants are widely expected to have different impacts on soil nitrogen (N) availability because of differences in leaf litter chemistry and ensuing effects on net N mineralization (N(min)). We evaluated this hypothesis by compiling published data on net N(min) rates beneath co-occurring stands of evergreen and deciduous trees. The compiled data included 35 sets of co-occurring stands in temperate and boreal forests. Evergreen and deciduous stands did not have consistently divergent effects on net N(min) rates; net N(min) beneath deciduous trees was higher when comparing natural stands (19 contrasts), but equivalent to evergreens in plantations (16 contrasts). We also compared net N(min) rates beneath pairs of co-occurring genera. Most pairs of genera did not differ consistently, i.e., tree species from one genus had higher net N(min) at some sites and lower net N(min) at other sites. Moreover, several common deciduous genera (Acer, Betula, Populus) and deciduous Quercus spp. did not typically have higher net N(min) rates than common evergreen genera (Pinus, Picea). There are several reasons why tree effects on net N(min) are poorly predicted by leaf habit and phylogeny. For example, the amount of N mineralized from decomposing leaves might be less than the amount of N mineralized from organic matter pools that are less affected by leaf litter traits, such as dead roots and soil organic matter. Also, effects of plant traits and plant groups on net N(min) probably depend on site-specific factors such as stand age and soil type.

DOI: 10.1890/11-1906.1
PubMed: 22834386

Affiliations:

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Le document en format XML

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<author><name sortKey="Mueller, Kevin E" sort="Mueller, Kevin E" uniqKey="Mueller K" first="Kevin E" last="Mueller">Kevin E. Mueller</name>
<affiliation wicri:level="4"><nlm:affiliation>Pennsylvania State University, Intercollege Graduate Degree Program in Ecology, Department of Horticulture, University Park, Pennsylvania 16802, USA. kevin.e.mueller@gmail.com</nlm:affiliation>
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<wicri:regionArea>Pennsylvania State University, Intercollege Graduate Degree Program in Ecology, Department of Horticulture, University Park, Pennsylvania 16802</wicri:regionArea>
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<author><name sortKey="Oleksyn, Jacek" sort="Oleksyn, Jacek" uniqKey="Oleksyn J" first="Jacek" last="Oleksyn">Jacek Oleksyn</name>
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<author><name sortKey="Reich, Peter B" sort="Reich, Peter B" uniqKey="Reich P" first="Peter B" last="Reich">Peter B. Reich</name>
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<term>Plant Leaves (physiology)</term>
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<term>Trees (classification)</term>
<term>Trees (physiology)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (classification)</term>
<term>Arbres (physiologie)</term>
<term>Azote (composition chimique)</term>
<term>Feuilles de plante (physiologie)</term>
<term>Sol (composition chimique)</term>
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<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Nitrogen</term>
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<term>Feuilles de plante</term>
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<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Leaves</term>
<term>Trees</term>
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<front><div type="abstract" xml:lang="en">Evergreen and deciduous plants are widely expected to have different impacts on soil nitrogen (N) availability because of differences in leaf litter chemistry and ensuing effects on net N mineralization (N(min)). We evaluated this hypothesis by compiling published data on net N(min) rates beneath co-occurring stands of evergreen and deciduous trees. The compiled data included 35 sets of co-occurring stands in temperate and boreal forests. Evergreen and deciduous stands did not have consistently divergent effects on net N(min) rates; net N(min) beneath deciduous trees was higher when comparing natural stands (19 contrasts), but equivalent to evergreens in plantations (16 contrasts). We also compared net N(min) rates beneath pairs of co-occurring genera. Most pairs of genera did not differ consistently, i.e., tree species from one genus had higher net N(min) at some sites and lower net N(min) at other sites. Moreover, several common deciduous genera (Acer, Betula, Populus) and deciduous Quercus spp. did not typically have higher net N(min) rates than common evergreen genera (Pinus, Picea). There are several reasons why tree effects on net N(min) are poorly predicted by leaf habit and phylogeny. For example, the amount of N mineralized from decomposing leaves might be less than the amount of N mineralized from organic matter pools that are less affected by leaf litter traits, such as dead roots and soil organic matter. Also, effects of plant traits and plant groups on net N(min) probably depend on site-specific factors such as stand age and soil type.</div>
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<Abstract><AbstractText>Evergreen and deciduous plants are widely expected to have different impacts on soil nitrogen (N) availability because of differences in leaf litter chemistry and ensuing effects on net N mineralization (N(min)). We evaluated this hypothesis by compiling published data on net N(min) rates beneath co-occurring stands of evergreen and deciduous trees. The compiled data included 35 sets of co-occurring stands in temperate and boreal forests. Evergreen and deciduous stands did not have consistently divergent effects on net N(min) rates; net N(min) beneath deciduous trees was higher when comparing natural stands (19 contrasts), but equivalent to evergreens in plantations (16 contrasts). We also compared net N(min) rates beneath pairs of co-occurring genera. Most pairs of genera did not differ consistently, i.e., tree species from one genus had higher net N(min) at some sites and lower net N(min) at other sites. Moreover, several common deciduous genera (Acer, Betula, Populus) and deciduous Quercus spp. did not typically have higher net N(min) rates than common evergreen genera (Pinus, Picea). There are several reasons why tree effects on net N(min) are poorly predicted by leaf habit and phylogeny. For example, the amount of N mineralized from decomposing leaves might be less than the amount of N mineralized from organic matter pools that are less affected by leaf litter traits, such as dead roots and soil organic matter. Also, effects of plant traits and plant groups on net N(min) probably depend on site-specific factors such as stand age and soil type.</AbstractText>
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Do evergreen and deciduous trees have different effects on net N mineralization in soil?

Do evergreen and deciduous trees have different effects on net N mineralization in soil?

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