| Title | Shifts in soil microbial community biomass and resource utilization along a Canadian glacier chronosequence |
| Publication Type | Journal Article |
| Year of Publication | 2013 |
| Authors | Hahn A.S, Quideau S.A |
| Journal | Canadian Journal of Soil Science |
| Volume | 93 |
| Pagination | 305-318 |
| Date Published | Aug |
| Type of Article | Article |
| ISBN Number | 0008-4271 |
| Accession Number | WOS:000324791000004 |
| Keywords | Agriculture, alpine chronosequence, ecosystem, enzyme-activity, forest, Glacier forefield, glucose respiration, metabolic quotient, nitrogen-fixation, northern alberta, peroxidase and, phenol oxidase activity, phospholipid fatty acid analysis, Plant succession, primary succession, rhizosphere, soil microbial communities |
| Abstract | Les auteurs souhaitaient decrire la composition et la diversite fonctionnelle de la population microbienne du sol, ainsi que preciser Pinfluence de Pepinette d'Engelmann (Picea engelmannii Parry) et de la dryade de Drummond (Dryas drummondii Rich.) sur la succession de la microflore dans la chronosequence d'un glacier canadien. Pour cela, us ont evalue la composition et Pactivite fonctionnelle des unicellulaires telluriques par l'analyse des acides gras phospholipidiques (AGPL), de la respiration induite par le substrat et de l'activite enzymatique. A ce qu'ils sachent, ii s'agit de la premiere etude sur Pactivite de la peroxydase et de la phenol oxydase, deux indicateurs de Pactivite des cryptogames, realisee sur une chronosequence glaciaire. Bien que l'analyse des AGPL n'ait revele aucune variation dans la composition de la population microbienne le long de la chronosequence, la biomasse totale d'unicellulaires et Pactivite des cryptogames augmentent dans le temps apres la &glaciation. La dryade de Drummond, plante qu'on sait faciliter la fixation de l'azote par les unicellulaires au milieu et a la fin de la succession, accroit la biomasse microbienne du sol, 'name s'il faut attendre quarante ans apres la deglaciation pour qu'un tel effet se manifeste. D'autre part, les auteurs ont decouvert une correlation significative entre la respiration microbienne de la N-acetyl-glucosamine, de l'acide protocatechique et du glucose, et le pourcentage de N dans le sol durant la chronosequence, signe que la microflore du sol influe sur les changements subis par l'environnement tellurique.
|
| Short Title | Can. J. Soil Sci.Can. J. Soil Sci. |
| Alternate Journal | Can. J. Soil Sci. |
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Times Cited: 10
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Hahn, Aria S. Quideau, Sylvie A.
Quideau, Sylvie/C-9646-2015
Quideau, Sylvie/0000-0002-2297-9024
Natural Sciences and Engineering Research Council (NSERC) of Canada; NSERC Alexander Graham Bell Canada Graduate Scholarship; Mount Robson Provincial Park [104737]
Funding for this research was provided by a Natural Sciences and Engineering Research Council (NSERC) of Canada discovery grant to S.A. Quideau and a NSERC Alexander Graham Bell Canada Graduate Scholarship to A. S. Hahn. In addition, the project was supported by Mount Robson Provincial Park (authorization number 104737). We would like to express gratitude to Gerald Cohen for his advice in planning this experiment and extend a special thank you to our field assistants, C. E. Norris and L. Soucemarianadin, for their hard work and enduring enthusiasm for the project. Finally, we would like to thank the reviewers of this paper whose support and suggestions greatly improved the quality of the manuscript.
10
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39
Agricultural inst canada
Ottawa
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