CheneBelgiqueV2, Main, Exploration, bibRecord, 000723

Microbial biomass and C and N transformations in forest floors under European beech, sessile oak, Norway spruce and Douglas-fir at four temperate forest sites

Identifieur interne : 000723 ( Main/Exploration ); précédent : 000722; suivant : 000724

Microbial biomass and C and N transformations in forest floors under European beech, sessile oak, Norway spruce and Douglas-fir at four temperate forest sites

Auteurs : S. Malchair [Belgique] ; M. Carnol [Belgique]

Source :

Soil biology & biochemistry [ 0038-0717 ] ; 2009.

RBID : Pascal:09-0209054

Descripteurs français

Pascal (Inist)
- Biomasse microbienne, Cycle carbone, Cycle azote, Litière, Zone tempérée, Forêt, Station forestière, Minéralisation, Nitrification, Fagus sylvatica, Quercus petraea, Picea abies, Pseudotsuga menziesii, Carbone organique, Azote, Sol forestier, Respiration, Science du sol.
Wicri :
- topic : Zone tempérée, Forêt, Azote.

English descriptors

KwdEn :
- Carbon cycle, Fagus sylvatica, Forest site, Forest soil, Forests, Litter, Microbial biomass, Mineralization, Nitrification, Nitrogen, Nitrogen cycle, Organic carbon, Picea abies, Pseudotsuga menziesii, Quercus petraea, Respiration, Soil science, Temperate zone.

Abstract

The purpose of this research was to compare soil chemistry, microbially mediated carbon (C) and nitrogen (N) transformations and microbial biomass in forest floors under European beech (Fagus sylvatica L), sessile oak (Quercus petraea (Mattuschka) Lieblein), Norway spruce (Picea abies (L) Karst) and Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) at four study sites. We measured soil chemical characteristics, net N mineralization, potential and relative nitrification, basal respiration, microbial and metabolic quotient and microbial biomass C and N under monoculture stands at all sites (one mixed stand). Tree species affected soil chemistry, microbial activities and biomass, but these effects varied between sites. Our results indicated that the effect of tree species on net N mineralization was likely to be mediated through their effect on soil microbial biomass, reflecting their influence on organic matter content and carbon availability. Differences in potential nitrification and relative nitrification might be related to the presence of ground vegetation through its influence on soil NH₄ and labile C availability. Our findings highlight the need to study the effects of tree species on microbial activities at several sites to elucidate complex N cycle interactions between tree species, ground vegetation, soil characteristics and microbial processes.

Affiliations:

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to stream Main, to step Curation: 000723

Le document en format XML

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<term>Litter</term>
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<term>Mineralization</term>
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<term>Forêt</term>
<term>Station forestière</term>
<term>Minéralisation</term>
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<term>Fagus sylvatica</term>
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<front><div type="abstract" xml:lang="en">The purpose of this research was to compare soil chemistry, microbially mediated carbon (C) and nitrogen (N) transformations and microbial biomass in forest floors under European beech (Fagus sylvatica L), sessile oak (Quercus petraea (Mattuschka) Lieblein), Norway spruce (Picea abies (L) Karst) and Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) at four study sites. We measured soil chemical characteristics, net N mineralization, potential and relative nitrification, basal respiration, microbial and metabolic quotient and microbial biomass C and N under monoculture stands at all sites (one mixed stand). Tree species affected soil chemistry, microbial activities and biomass, but these effects varied between sites. Our results indicated that the effect of tree species on net N mineralization was likely to be mediated through their effect on soil microbial biomass, reflecting their influence on organic matter content and carbon availability. Differences in potential nitrification and relative nitrification might be related to the presence of ground vegetation through its influence on soil NH<sub>4</sub>
 and labile C availability. Our findings highlight the need to study the effects of tree species on microbial activities at several sites to elucidate complex N cycle interactions between tree species, ground vegetation, soil characteristics and microbial processes.</div>
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Microbial biomass and C and N transformations in forest floors under European beech, sessile oak, Norway spruce and Douglas-fir at four temperate forest sites

Microbial biomass and C and N transformations in forest floors under European beech, sessile oak, Norway spruce and Douglas-fir at four temperate forest sites

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