HagedornHiltbrunnerStreitEtAl2013

Reference

Hagedorn, F., Hiltbrunner, D., Streit, K., Ekblad, A., Lindahl, B., Miltner, A., Frey, B., Handa, I.T., Hattenschwiler, S. (2013) Nine years of CO2 enrichment at the alpine treeline stimulates soil respiration but does not alter soil microbial communities. Soil Biology and Biochemistry, 57:390-400. (Scopus )

Abstract

Elevated atmospheric CO2 was often shown to stimulate belowground C allocation, but it is uncertain if this increase also alters the structure of soil microbial communities. Here, we assessed the effects of nine years of CO2 enrichment on soil microbial communities of an alpine treeline ecosystem with 35-year-old Larix decidua and Pinus mugo ssp. uncinata trees. We also tracked the 13C signal of supplemental CO2 in soil-respired CO2, microbial biomass, and phospholipid fatty acids (PLFA) in undisturbed mor-type organic layers. We found a persistently increased soil CO2 efflux (+24% on average), but negligible effects of elevated CO2 on the biomass and community structure of soil microorganisms under both tree species determined with PLFA and T-RFLP (terminal restriction fragment length polymorphism). The 13C tracing over 9 years revealed that 24-40% of the soil microbial biomass was composed of 'new' plant-derived C. PLFA from gram-negative biomarkers did not significant shift in 13C by the CO2 addition, while those of gram-negative bacteria were significantly altered. The highest 13C signals in individual PLFA was found in the fatty acid 18:2ω6,9 with 65-80% new C, indicating that new plant-derived C was primarily incorporated by soil fungi. However, CO2 enrichment did not affect the production of mycelia biomass and the structure and composition of the fungal communities analysed by high-throughput 454-sequencing of genetic markers. Collectively, our results suggest that C flux through the plant-soil system will be accelerated but that the biomass and composition of microbial communities will be little affected by rising atmospheric CO2 in organic matter rich treeline soils. © 2012 Elsevier Ltd.

EndNote Format

You can import this reference in EndNote.

BibTeX-CSV Format

You can import this reference in BibTeX-CSV format.

BibTeX Format

You can copy the BibTeX entry of this reference below, orimport it directly in a software like JabRef .

@ARTICLE { HagedornHiltbrunnerStreitEtAl2013,
    AUTHOR = { Hagedorn, F. and Hiltbrunner, D. and Streit, K. and Ekblad, A. and Lindahl, B. and Miltner, A. and Frey, B. and Handa, I.T. and Hattenschwiler, S. },
    TITLE = { Nine years of CO2 enrichment at the alpine treeline stimulates soil respiration but does not alter soil microbial communities },
    JOURNAL = { Soil Biology and Biochemistry },
    YEAR = { 2013 },
    VOLUME = { 57 },
    PAGES = { 390-400 },
    ABSTRACT = { Elevated atmospheric CO2 was often shown to stimulate belowground C allocation, but it is uncertain if this increase also alters the structure of soil microbial communities. Here, we assessed the effects of nine years of CO2 enrichment on soil microbial communities of an alpine treeline ecosystem with 35-year-old Larix decidua and Pinus mugo ssp. uncinata trees. We also tracked the 13C signal of supplemental CO2 in soil-respired CO2, microbial biomass, and phospholipid fatty acids (PLFA) in undisturbed mor-type organic layers. We found a persistently increased soil CO2 efflux (+24% on average), but negligible effects of elevated CO2 on the biomass and community structure of soil microorganisms under both tree species determined with PLFA and T-RFLP (terminal restriction fragment length polymorphism). The 13C tracing over 9 years revealed that 24-40% of the soil microbial biomass was composed of 'new' plant-derived C. PLFA from gram-negative biomarkers did not significant shift in 13C by the CO2 addition, while those of gram-negative bacteria were significantly altered. The highest 13C signals in individual PLFA was found in the fatty acid 18:2ω6,9 with 65-80% new C, indicating that new plant-derived C was primarily incorporated by soil fungi. However, CO2 enrichment did not affect the production of mycelia biomass and the structure and composition of the fungal communities analysed by high-throughput 454-sequencing of genetic markers. Collectively, our results suggest that C flux through the plant-soil system will be accelerated but that the biomass and composition of microbial communities will be little affected by rising atmospheric CO2 in organic matter rich treeline soils. © 2012 Elsevier Ltd. },
    COMMENT = { Export Date: 20 February 2013 Source: Scopus CODEN: SBIOA doi: 10.1016/j.soilbio.2012.10.001 },
    ISSN = { 00380717 (ISSN) },
    KEYWORDS = { Carbon cycling, Elevated CO2, Fungi, Isotope tracing, Microbial community, PLFA, Soil respiration, Tree species, Treeline, Carbon cycling, Elevated CO, Isotope tracing, Microbial communities, PLFA, Soil respiration, Tree species, Treeline, Biomass, Ecosystems, Forestry, Fungi, Isotopes, Microorganisms, Phospholipids, Soils, Carbon dioxide, alpine environment, bacterium, biomarker, carbon dioxide, carbon isotope, community composition, coniferous tree, fatty acid, fungus, genetic marker, microbial community, phospholipid, polymorphism, resource allocation, soil microorganism, soil respiration, treeline, Carbon Dioxide, Fungi, Isotopes, Lipids, Microbiology, Microorganisms, Respiration, Soil, Fungi, Larix, Larix decidua, Negibacteria, Pinus mugo },
    OWNER = { Luc },
    TIMESTAMP = { 2013.02.20 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84869865501&partnerID=40&md5=c9e6935b5c43703f732eb05469325e1b },
}

********************************************************** ***************** Facebook Twitter *********************** **********************************************************

Abonnez-vous à
l'Infolettre du CEF!

********************************************************** ***************** Pub - Symphonies_Boreales ****************** **********************************************************

********************************************************** ***************** Boîte à trucs *************** **********************************************************

CEF-Référence
La référence vedette !

Jérémie Alluard (2016) Les statistiques au moments de la rédaction 

  • Ce document a pour but de guider les étudiants à intégrer de manière appropriée une analyse statistique dans leur rapport de recherche.

Voir les autres...