BrassardChenBergeronEtAl2011b
Référence
Brassard, B.W., Chen, H.Y.H., Bergeron, Y., Pare, D. (2011) Differences in fine root productivity between mixed- and single-speciesstands. Functional Ecology, 25(1):238-246. (Scopus 
)
Résumé
1.The diversity-productivity debate has so far been focused above-ground,despite that below-ground production can account for approximatelyhalf of total annual net primary production, mostly from fine roots.2.Here, we investigate the fine root productivity of mature, fire-originstands of Populus tremuloides-Picea spp.-Abies balsamea (mixed-speciesstands) and relatively pure P. tremuloides (single-species stands)in two regions of North American boreal forest to better understandthe link between plant diversity and below-ground productivity inforest ecosystems. We hypothesized that: (i) mixed-species standshave higher fine root productivity compared with single-species standsand (ii) this difference may be the result of greater soil spacefilling by the fine roots due to the contrasting rooting traits ofthe component species in the mixed-species stands. 3.We found thatfine root productivity, measured by annual production and total biomass,was higher in mixed- than single-species stands. We also found thatmixed-species stands had lower and higher horizontal and verticalfine root biomass heterogeneity, respectively, indicating that soilspace is more fully occupied by fine roots in the mixed- than single-speciesstands. 4.In all, our study supports that below-ground niche differentiationmay be a key driver of higher fine root productivity in mixed standsof species with contrasting rooting traits than single-species standsby facilitating greater soil space filling of fine roots and soilresource exploitation. © 2010 The Authors. Functional Ecology ©2010 British Ecological Society.
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@ARTICLE { BrassardChenBergeronEtAl2011b,
AUTHOR = { Brassard, B.W. and Chen, H.Y.H. and Bergeron, Y. and Pare, D. },
TITLE = { Differences in fine root productivity between mixed- and single-speciesstands },
JOURNAL = { Functional Ecology },
YEAR = { 2011 },
VOLUME = { 25 },
PAGES = { 238-246 },
NUMBER = { 1 },
ABSTRACT = { 1.The diversity-productivity debate has so far been focused above-ground,despite that below-ground production can account for approximatelyhalf of total annual net primary production, mostly from fine roots.2.Here, we investigate the fine root productivity of mature, fire-originstands of Populus tremuloides-Picea spp.-Abies balsamea (mixed-speciesstands) and relatively pure P. tremuloides (single-species stands)in two regions of North American boreal forest to better understandthe link between plant diversity and below-ground productivity inforest ecosystems. We hypothesized that: (i) mixed-species standshave higher fine root productivity compared with single-species standsand (ii) this difference may be the result of greater soil spacefilling by the fine roots due to the contrasting rooting traits ofthe component species in the mixed-species stands. 3.We found thatfine root productivity, measured by annual production and total biomass,was higher in mixed- than single-species stands. We also found thatmixed-species stands had lower and higher horizontal and verticalfine root biomass heterogeneity, respectively, indicating that soilspace is more fully occupied by fine roots in the mixed- than single-speciesstands. 4.In all, our study supports that below-ground niche differentiationmay be a key driver of higher fine root productivity in mixed standsof species with contrasting rooting traits than single-species standsby facilitating greater soil space filling of fine roots and soilresource exploitation. © 2010 The Authors. Functional Ecology ©2010 British Ecological Society. },
COMMENT = { Export Date: 3 February 2011Source: ScopusCODEN: FECOEdoi: 10.1111/j.1365-2435.2010.01769.x },
ISSN = { 02698463 (ISSN) },
KEYWORDS = { Boreal forest, Over-yielding, Plant competition, Resource use, Spatialrooting heterogeneity, Species complementarity },
OWNER = { Luc },
TIMESTAMP = { 2011.02.03 },
URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-78751697667&partnerID=40&md5=1ea39f91929fd0d76fdaa460e1552ea4 },
}
