MartyHouleGagnonEtAl2011

Référence

Marty, C., Houle, D., Gagnon, C. and Duchesne, L. (2011) Isotopic compositions of S, N and C in soils and vegetation of three forest types in Québec, Canada. Applied Geochemistry, 26(12):2181-2190. (Scopus )

Résumé

The concentrations and the isotopic compositions of S, N and C were studied in soils and in the dominant plant species of three forested watersheds (Québec, Canada) located along a latitudinal and atmospheric deposition gradient. Large increases in S, N and C isotope ratios (up to 3.9‰, 10‰, 2.6‰, respectively) were observed with increasing soil depth at the three watersheds. These increases were accompanied by a strong decrease in elemental concentrations resulting in a strong negative relationship between these two variables. Both S and N concentrations throughout the soil profile and δ34S and δ15N in the mineral soil appeared to increase with increasing S and N deposition rates and decreasing latitude. A strong positive linear relationship was found between δ34S and δ15N (R2=0.72) values and between organic S and N concentrations (R2=0.96) in soils. The slope of the linear relationship between δ34S and δ15N (δ34S=f(δ15N)) indicated that isotopic fractionation was almost 4 times higher for S than for N during transformations that occurred in soil. However, this difference might reflect a higher degree of openness of the S cycle compared to the N cycle rather than an isotope effect per se. Overall, the results suggest that N and S inputs significantly impact the isotope ratios and the concentrations of N and S in the soils, and that S and N were closely associated and subject to similar processes with the same isotopic effects throughout the soil profile. Contrary to most studies, δ34S-SO4 in stream water of the most northerly site with the lowest S deposition rate was significantly higher than δ34S-SO4 in atmospheric depositions but similar to the δ34S of the bulk mineral soil. It suggests that the mineral soil actually contributes a large portion of the stream S-SO4 for this site. © 2011.

Format EndNote

Vous pouvez importer cette référence dans EndNote.

Format BibTeX-CSV

Vous pouvez importer cette référence en format BibTeX-CSV.

Format BibTeX

Vous pouvez copier l'entrée BibTeX de cette référence ci-bas, ou l'importer directement dans un logiciel tel que JabRef .

@ARTICLE { MartyHouleGagnonEtAl2011,
    AUTHOR = { Marty, C. and Houle, D. and Gagnon, C. and Duchesne, L. },
    TITLE = { Isotopic compositions of S, N and C in soils and vegetation of three forest types in Québec, Canada },
    JOURNAL = { Applied Geochemistry },
    YEAR = { 2011 },
    VOLUME = { 26 },
    PAGES = { 2181-2190 },
    NUMBER = { 12 },
    NOTE = { cited By 5 },
    ABSTRACT = { The concentrations and the isotopic compositions of S, N and C were studied in soils and in the dominant plant species of three forested watersheds (Québec, Canada) located along a latitudinal and atmospheric deposition gradient. Large increases in S, N and C isotope ratios (up to 3.9‰, 10‰, 2.6‰, respectively) were observed with increasing soil depth at the three watersheds. These increases were accompanied by a strong decrease in elemental concentrations resulting in a strong negative relationship between these two variables. Both S and N concentrations throughout the soil profile and δ34S and δ15N in the mineral soil appeared to increase with increasing S and N deposition rates and decreasing latitude. A strong positive linear relationship was found between δ34S and δ15N (R2=0.72) values and between organic S and N concentrations (R2=0.96) in soils. The slope of the linear relationship between δ34S and δ15N (δ34S=f(δ15N)) indicated that isotopic fractionation was almost 4 times higher for S than for N during transformations that occurred in soil. However, this difference might reflect a higher degree of openness of the S cycle compared to the N cycle rather than an isotope effect per se. Overall, the results suggest that N and S inputs significantly impact the isotope ratios and the concentrations of N and S in the soils, and that S and N were closely associated and subject to similar processes with the same isotopic effects throughout the soil profile. Contrary to most studies, δ34S-SO4 in stream water of the most northerly site with the lowest S deposition rate was significantly higher than δ34S-SO4 in atmospheric depositions but similar to the δ34S of the bulk mineral soil. It suggests that the mineral soil actually contributes a large portion of the stream S-SO4 for this site. © 2011. },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.apgeochem.2011.08.002 },
    KEYWORDS = { Atmospheric depositions; Elemental concentrations; Forest type; Forested watersheds; Higher-degree; Isotope effect; Isotope ratio; Isotopic composition; Isotopic effects; Isotopic fractionations; Linear relationships; Mineral soils; N deposition; Plant species; Soil depth; Soil profiles; Stream water, Atmospheric chemistry; Deposition rates; Forestry; Isotopes; Meteorological problems; Silicate minerals; Watersheds, Soils, atmospheric deposition; carbon; concentration (composition); dominance; forest ecosystem; isotopic composition; isotopic fractionation; isotopic ratio; latitude; nitrogen isotope; soil depth; soil profile; sulfur cycle; sulfur isotope; vegetation structure; watershed, Concentration; Deposition; Forestry; Isotopes; Meteorology; Plants; Silicates; Soil; Water Sheds, Canada; Quebec [Canada] },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-82155162491&partnerID=40&md5=12c57fbb0266527ff522b50fa660bec4 },
}

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

Abonnez-vous à
l'Infolettre du CEF!

********************************************************** ***************** Pub - Mycorhizes_2019 ****************** **********************************************************

********************************************************** ***************** 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...