GrenonBradleyJoanisseEtAl2004

Référence

Grenon, F., Bradley, R.L., Joanisse, G., Titus, B.D. and Prescott, C.E. (2004) Mineral N availability for conifer growth following clearcutting: Responsive versus non-responsive ecosystems. Forest Ecology and Management, 188(1-3):305-316.

Résumé

We compared mineral N concentrations, potential net mineralization rates and gross N mineralization rates in the forest floor of 4-year-old clearcut plots and adjacent mature forest stands, in three distinct coniferous ecosystems in British Columbia (coastal low elevation, coastal montane, interior montane). Our data showed that clearcutting has no effect on forest floor mineral N dynamics in some coniferous ecosystems, and significant effects in others. Among "responsive" sites, we noted contradictory effects of clearcutting on some of the measured N variables. Furthermore, the effects of clearcutting on potential net mineralization were not consistent with changes in gross production rates of mineral N. We discuss these observations in light of our knowledge of the ecology of each site, of the various sources and sinks of mineral N, and of the biotic and abiotic factors controlling mineral N dynamics. Our results suggest that generalizations cannot be made on the effects of clearcutting on mineral N supply to conifer seedlings, as these can lead to incorrect interpretations of ecosystem dynamics, with serious policy-relevant ramifications for the forest industry. © 2003 Elsevier B.V. All rights reserved.

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@ARTICLE { GrenonBradleyJoanisseEtAl2004,
    AUTHOR = { Grenon, F. and Bradley, R.L. and Joanisse, G. and Titus, B.D. and Prescott, C.E. },
    TITLE = { Mineral N availability for conifer growth following clearcutting: Responsive versus non-responsive ecosystems },
    JOURNAL = { Forest Ecology and Management },
    YEAR = { 2004 },
    VOLUME = { 188 },
    PAGES = { 305-316 },
    NUMBER = { 1-3 },
    NOTE = { 03781127 (ISSN) Cited By (since 1996): 9 Export Date: 26 April 2007 Source: Scopus CODEN: FECMD doi: 10.1016/j.foreco.2003.08.008 Language of Original Document: English Correspondence Address: Bradley, R.L.; De?partement de Biologie; Ctr. de Rech. en Biol. Forestiere; Universite? de Sherbrooke Sherbrooke, Que. J1K 2R1, Canada; email: robert.bradley@usherbrooke.ca References: Aber, J.D., Nitrogen cycling and nitrogen saturation in temperate forest ecosystems (1992) Trends Ecol. Evol., 7, pp. 220-224; Adams, P.W., Flint, A.L., Fredriksen, R.L., Long-term patterns in soil moisture and revegetation after a clearcut of a Douglas-fir forest in Oregon (1991) For. Ecol. 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    ABSTRACT = { We compared mineral N concentrations, potential net mineralization rates and gross N mineralization rates in the forest floor of 4-year-old clearcut plots and adjacent mature forest stands, in three distinct coniferous ecosystems in British Columbia (coastal low elevation, coastal montane, interior montane). Our data showed that clearcutting has no effect on forest floor mineral N dynamics in some coniferous ecosystems, and significant effects in others. Among "responsive" sites, we noted contradictory effects of clearcutting on some of the measured N variables. Furthermore, the effects of clearcutting on potential net mineralization were not consistent with changes in gross production rates of mineral N. We discuss these observations in light of our knowledge of the ecology of each site, of the various sources and sinks of mineral N, and of the biotic and abiotic factors controlling mineral N dynamics. Our results suggest that generalizations cannot be made on the effects of clearcutting on mineral N supply to conifer seedlings, as these can lead to incorrect interpretations of ecosystem dynamics, with serious policy-relevant ramifications for the forest industry. © 2003 Elsevier B.V. All rights reserved. },
    KEYWORDS = { Clearcutting Ecosystem dynamics Mineral N availability Ecology Ecosystems Growth kinetics Minerals Nitrogen Mineralization Forestry clearcutting coniferous forest mineralization nitrogen nutrient availability British Columbia Canada North America },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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