JobidonCyrThiffault2004

Référence

Jobidon, R., Cyr, G. and Thiffault, N. (2004) Plant species diversity and composition along an experimental gradient of northern hardwood abundance in Picea mariana plantations. Forest Ecology and Management, 198(1-3):209-221. (Scopus )

Résumé

Maintenance of biodiversity in managed forest ecosystem is an increasing concern, particularly in plantation forests. To test the two hypotheses that (i) past vegetation treatments modify species diversity and that (ii) a trade-off exists between plantation productivity and diversity, we measured plant species diversity in the upper, intermediate and lower strata of 16-17-year-old Picea mariana plantations along a gradient of hardwood abundance. The gradient was obtained with various intensities of non-chemical release and thinning treatments. P. mariana productivity linearly decreased as the proportion of hardwoods within the canopy increased. As the proportion of P. mariana increased, total species richness and plant diversity (Shannon index [H']) first increased up to an intermediate level, and then decreased. Proportion of non-crop to crop tree species explained 66% of the variation in species diversity of the upper strata, 0% of the intermediate strata, and 20% of the lower strata. Intensity of past vegetation treatments slightly affected species composition, as evaluated by the Sørensen's index of similarity. Maintaining an almost exclusive cover of P. mariana had marginal effects on species richness and understory diversity. But, a large increase in hardwoods proportion occurred at the expense of species richness and diversity of the understory stratum. Differences in canopy light transmission between covers could not explain this result. Variation in species richness and diversity along the gradient of hardwood abundance had a hump shape, a characteristic of the classic disturbance-diversity hypothesis. But, the intensity of past vegetation control had a weak predictive capability for plant species richness and diversity. Thus, vegetation control to maximise crop tree productivity in P. mariana plantations is not likely to affect understory plant diversity or composition. It may however contribute to an increase in stand structural diversity. © 2004 Elsevier B.V. All rights reserved.

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 { JobidonCyrThiffault2004,
    AUTHOR = { Jobidon, R. and Cyr, G. and Thiffault, N. },
    TITLE = { Plant species diversity and composition along an experimental gradient of northern hardwood abundance in Picea mariana plantations },
    JOURNAL = { Forest Ecology and Management },
    YEAR = { 2004 },
    VOLUME = { 198 },
    PAGES = { 209-221 },
    NUMBER = { 1-3 },
    NOTE = { cited By 28 },
    ABSTRACT = { Maintenance of biodiversity in managed forest ecosystem is an increasing concern, particularly in plantation forests. To test the two hypotheses that (i) past vegetation treatments modify species diversity and that (ii) a trade-off exists between plantation productivity and diversity, we measured plant species diversity in the upper, intermediate and lower strata of 16-17-year-old Picea mariana plantations along a gradient of hardwood abundance. The gradient was obtained with various intensities of non-chemical release and thinning treatments. P. mariana productivity linearly decreased as the proportion of hardwoods within the canopy increased. As the proportion of P. mariana increased, total species richness and plant diversity (Shannon index [H']) first increased up to an intermediate level, and then decreased. Proportion of non-crop to crop tree species explained 66% of the variation in species diversity of the upper strata, 0% of the intermediate strata, and 20% of the lower strata. Intensity of past vegetation treatments slightly affected species composition, as evaluated by the Sørensen's index of similarity. Maintaining an almost exclusive cover of P. mariana had marginal effects on species richness and understory diversity. But, a large increase in hardwoods proportion occurred at the expense of species richness and diversity of the understory stratum. Differences in canopy light transmission between covers could not explain this result. Variation in species richness and diversity along the gradient of hardwood abundance had a hump shape, a characteristic of the classic disturbance-diversity hypothesis. But, the intensity of past vegetation control had a weak predictive capability for plant species richness and diversity. Thus, vegetation control to maximise crop tree productivity in P. mariana plantations is not likely to affect understory plant diversity or composition. It may however contribute to an increase in stand structural diversity. © 2004 Elsevier B.V. All rights reserved. },
    AUTHOR_KEYWORDS = { Canopy light transmission; Floristic diversity; Man-made disturbance; Stand structure; Vegetation control },
    CODEN = { FECMD },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.foreco.2004.04.020 },
    ISSN = { 03781127 },
    KEYWORDS = { Biodiversity; Ecosystems; Hardwoods; Plants (botany); Vegetation, Plant diversity; Plantation productivity; Vegetation treatments, Forestry, community composition; forest management; forestry production; plantation; species diversity; stand structure, Ecosystems; Hardwoods; Picea Mariana; Plantations; Plants, Picea; Picea mariana },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-3543051803&partnerID=40&md5=8373b8e86f7e305b59200783145ade01 },
}

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