RossiBordeleauMorinEtAl2013

Référence

Rossi, S., Bordeleau, A., Morin, H. and Houle, D. (2013) The effects of N-enriched rain and warmer soil on the ectomycorrhizae of black spruce remain inconclusive in the short term. Annals of Forest Science, 70(8):825-834. (URL )

Résumé

Context Warmer temperatures and anthropogenic N depositions are altering soil nutrient cycles and plant nutrition worldwide and are projected to rise dramatically in the future, particularly at the high latitudes. How much will such alterations affect symbiotic organisms such as ectomycorrhizae (ECM)? Aims The aim was to investigate the short-term effects of warmer soil temperatures and N-enriched precipitations on roots and ECM. Methods A field experiment was established during 2008–2010 in two black spruce (Picea mariana) stands of the boreal forest of Quebec, Canada. The ECM of 12 trees per site were counted and identified by morphotyping. Results After 3 years, soil heating markedly modified the proportions of vital root tips and ECM in the colder stand, while no effect of the N-enriched rain was observed on soil chemistry and consequently on roots and ECM. Density and ramification of root tips were not affected by the treatments. Conclusion The hypothesis that the treatments would alter the ECM was confirmed only partially in the colder stand. The type of application and amount of N supplied were unable to substantially modify in the short-term growth conditions of roots and ECM, explaining the observed results.

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@ARTICLE { RossiBordeleauMorinEtAl2013,
    AUTHOR = { Rossi, S. and Bordeleau, A. and Morin, H. and Houle, D. },
    TITLE = { The effects of N-enriched rain and warmer soil on the ectomycorrhizae of black spruce remain inconclusive in the short term },
    JOURNAL = { Annals of Forest Science },
    YEAR = { 2013 },
    VOLUME = { 70 },
    PAGES = { 825-834 },
    NUMBER = { 8 },
    ABSTRACT = { Context Warmer temperatures and anthropogenic N depositions are altering soil nutrient cycles and plant nutrition worldwide and are projected to rise dramatically in the future, particularly at the high latitudes. How much will such alterations affect symbiotic organisms such as ectomycorrhizae (ECM)? Aims The aim was to investigate the short-term effects of warmer soil temperatures and N-enriched precipitations on roots and ECM. Methods A field experiment was established during 2008–2010 in two black spruce (Picea mariana) stands of the boreal forest of Quebec, Canada. The ECM of 12 trees per site were counted and identified by morphotyping. Results After 3 years, soil heating markedly modified the proportions of vital root tips and ECM in the colder stand, while no effect of the N-enriched rain was observed on soil chemistry and consequently on roots and ECM. Density and ramification of root tips were not affected by the treatments. Conclusion The hypothesis that the treatments would alter the ECM was confirmed only partially in the colder stand. The type of application and amount of N supplied were unable to substantially modify in the short-term growth conditions of roots and ECM, explaining the observed results. },
    DOI = { 10.1007/s13595-013-0329-1 },
    ISSN = { 1286-4560 },
    KEYWORDS = { Boreal forest; Nitrogen; Fungal diversity; Morphotyping; Picea mariana; Soil temperature },
    LANGUAGE = { English },
    OWNER = { nafon9 },
    PUBLISHER = { Springer Paris },
    TIMESTAMP = { 2013.11.28 },
    URL = { http://dx.doi.org/10.1007/s13595-013-0329-1 },
}

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