Successional changes in microbial biomass, respiration and nutrient status during litter decomposition in an aspen and pine forest
Identifieur interne : 000026 ( Istex/Curation ); précédent : 000025; suivant : 000027Successional changes in microbial biomass, respiration and nutrient status during litter decomposition in an aspen and pine forest
Auteurs : S. Scheu [Allemagne] ; D. Parkinson [Canada]Source :
- [ 0178-2762 ]
Abstract
Abstract: Microbial biomass, microbial respiration, metabolic quotient (qCO2), Cmic/Corg ratio and nutrient status of the microflora was investigated in different layers of an aspen (Populus tremuloides Michx.) and pine forest (Pinus contorta Loud.) in southwest Alberta, Canada. Changes in these parameters with soil depth were assumed to reflect successional changes in aging litter materials. The microbial nutrient status was investigated by analysing the respiratory response of glucose and nutrient (N and P) supplemented microorganisms. A strong decline in qCO2 with soil depth indicated a more efficient C use by microorganisms in later stages of decay in both forests. Cmic/Corg ratio also declined in the aspen forest with soil depth but in the pine forest it was at a maximum in the mineral soil layer. Microbial nutrient status in aspen leaf litter and pine needle litter indicated N limitation or high N demand, but changes in microbial nutrient status with soil depth differed strongly between both forests. In the aspen forest N deficiency appeared to decline in later stages of decay whereas P deficiency increased. In contrast, in the pine forest microbial growth was restricted mainly by N availability in each of the layers. Analysis of the respiratory response of CNP-supplemented microorganisms indicated that growth ability of microorganisms is related to the fungal-bacterial ratio.
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DOI: 10.1007/BF00336103
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<record><TEI wicri:istexFullTextTei="no"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Successional changes in microbial biomass, respiration and nutrient status during litter decomposition in an aspen and pine forest</title><author><name sortKey="Scheu, S" sort="Scheu, S" uniqKey="Scheu S" first="S." last="Scheu">S. Scheu</name><affiliation wicri:level="1"><mods:affiliation>Abteilung Ökologie, II Zoologisches Institut, Berliner Strasse 28, D-37073, Göttingen, Germany</mods:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Abteilung Ökologie, II Zoologisches Institut, Berliner Strasse 28, D-37073, Göttingen</wicri:regionArea></affiliation></author><author><name sortKey="Parkinson, D" sort="Parkinson, D" uniqKey="Parkinson D" first="D." last="Parkinson">D. Parkinson</name><affiliation wicri:level="1"><mods:affiliation>Department of Biology, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada</mods:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Biology, University of Calgary, 2500 University Drive NW, Calgary, Alberta</wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:75BA55F31B2E502B32672E2786EA52C979F56596</idno><date when="1995" year="1995">1995</date><idno type="doi">10.1007/BF00336103</idno><idno type="url">https://api-v5.istex.fr/document/75BA55F31B2E502B32672E2786EA52C979F56596/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000026</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000026</idno><idno type="wicri:Area/Istex/Curation">000026</idno></publicationStmt><sourceDesc><biblStruct><analytic><author><name sortKey="Scheu, S" sort="Scheu, S" uniqKey="Scheu S" first="S." last="Scheu">S. Scheu</name><affiliation wicri:level="1"><mods:affiliation>Abteilung Ökologie, II Zoologisches Institut, Berliner Strasse 28, D-37073, Göttingen, Germany</mods:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Abteilung Ökologie, II Zoologisches Institut, Berliner Strasse 28, D-37073, Göttingen</wicri:regionArea></affiliation></author><author><name sortKey="Parkinson, D" sort="Parkinson, D" uniqKey="Parkinson D" first="D." last="Parkinson">D. Parkinson</name><affiliation wicri:level="1"><mods:affiliation>Department of Biology, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada</mods:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Biology, University of Calgary, 2500 University Drive NW, Calgary, Alberta</wicri:regionArea></affiliation></author></analytic><series><idno type="ISSN">0178-2762</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0178-2762</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Microbial biomass, microbial respiration, metabolic quotient (qCO2), Cmic/Corg ratio and nutrient status of the microflora was investigated in different layers of an aspen (Populus tremuloides Michx.) and pine forest (Pinus contorta Loud.) in southwest Alberta, Canada. Changes in these parameters with soil depth were assumed to reflect successional changes in aging litter materials. The microbial nutrient status was investigated by analysing the respiratory response of glucose and nutrient (N and P) supplemented microorganisms. A strong decline in qCO2 with soil depth indicated a more efficient C use by microorganisms in later stages of decay in both forests. Cmic/Corg ratio also declined in the aspen forest with soil depth but in the pine forest it was at a maximum in the mineral soil layer. Microbial nutrient status in aspen leaf litter and pine needle litter indicated N limitation or high N demand, but changes in microbial nutrient status with soil depth differed strongly between both forests. In the aspen forest N deficiency appeared to decline in later stages of decay whereas P deficiency increased. In contrast, in the pine forest microbial growth was restricted mainly by N availability in each of the layers. Analysis of the respiratory response of CNP-supplemented microorganisms indicated that growth ability of microorganisms is related to the fungal-bacterial ratio.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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