KerneckerWhalenBradley2014

Référence

Kernecker, M., Whalen, J.K., Bradley, R.L. (2014) Litter Controls Earthworm-Mediated Carbon and Nitrogen Transformations in Soil from Temperate Riparian Buffers. Applied and Environmental Soil Science, 2014. (Scopus )

Résumé

Nutrient cycling in riparian buffers is partly influenced by decomposition of crop, grass, and native tree species litter. Nonnative earthworms in riparian soils in southern Quebec are expected to speed the processes of litter decomposition and nitrogen (N) mineralization, increasing carbon (C) and N losses in gaseous forms or via leachate. A 5-month microcosm experiment evaluated the effect of Aporrectodea turgida on the decomposition of 3 litter types (deciduous leaves, reed canarygrass, and soybean stem residue). Earthworms increased COand N losses from microcosms with soybean residue, by 112% and 670%, respectively, but reduced COand N fluxes from microcosms with reed canarygrass by 120% and 220%, respectively. Litter type controlled the COflux (soybean ≥ deciduous-mix litter reed canarygrass > no litter) and the N flux (soybean ≥ no litter ≥ reed canarygrass > deciduous-mix litter). However, in the presence of earthworms, there was a slight increase in C and N gaseous losses of C and N relative to their losses via leachate, across litter treatments. We conclude that litter type determines the earthworm-mediated decomposition effect, highlighting the importance of vegetation management in controlling C and N losses from riparian buffers to the environment. © 2014 Maria Kernecker et al.

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@ARTICLE { KerneckerWhalenBradley2014,
    AUTHOR = { Kernecker, M. and Whalen, J.K. and Bradley, R.L. },
    TITLE = { Litter Controls Earthworm-Mediated Carbon and Nitrogen Transformations in Soil from Temperate Riparian Buffers },
    JOURNAL = { Applied and Environmental Soil Science },
    YEAR = { 2014 },
    VOLUME = { 2014 },
    NOTE = { cited By 0 },
    ABSTRACT = { Nutrient cycling in riparian buffers is partly influenced by decomposition of crop, grass, and native tree species litter. Nonnative earthworms in riparian soils in southern Quebec are expected to speed the processes of litter decomposition and nitrogen (N) mineralization, increasing carbon (C) and N losses in gaseous forms or via leachate. A 5-month microcosm experiment evaluated the effect of Aporrectodea turgida on the decomposition of 3 litter types (deciduous leaves, reed canarygrass, and soybean stem residue). Earthworms increased COand N losses from microcosms with soybean residue, by 112% and 670%, respectively, but reduced COand N fluxes from microcosms with reed canarygrass by 120% and 220%, respectively. Litter type controlled the COflux (soybean ≥ deciduous-mix litter reed canarygrass > no litter) and the N flux (soybean ≥ no litter ≥ reed canarygrass > deciduous-mix litter). However, in the presence of earthworms, there was a slight increase in C and N gaseous losses of C and N relative to their losses via leachate, across litter treatments. We conclude that litter type determines the earthworm-mediated decomposition effect, highlighting the importance of vegetation management in controlling C and N losses from riparian buffers to the environment. © 2014 Maria Kernecker et al. },
    ART_NUMBER = { 329031 },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1155/2014/329031 },
    KEYWORDS = { Aporrectodea turgida; Glycine max; Phalaris arundinacea },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84934921565&partnerID=40&md5=e737c9095493a1f089d7961ae9f2dad8 },
}

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