Redding20041018

Référence

Redding, T.E., Hope, G.D., Schmidt, M.G., Fortin, M.-J. (2004) Analytical methods for defining stand-clearcut edge effects demonstrated for N mineralization. Canadian Journal of Forest Research, 34(5):1018-1024. (Scopus )

Résumé

Edge effects are becoming an important forest management consideration, but information regarding the influence of edges on N cycling variables has not been well documented. In addition, the quantification of edge effects can benefit from the application of complementary spatial analysis methods. Forest floor N mineralization and environmental variables were intensively measured 5 years after harvest along transects crossing the north and south edges of a 1-ha clearcut, in a high-elevation Engelmann spruce - subalpine fir forest. Wavelet analysis and depth-of-edge influence (DEI) methods were used to locate and measure the spatial extent of edge effects on N mineralization. Then variance partitioning (partial redundancy analysis) was used to examine the influence of edges on N mineralization relative to the influence of other environmental factors. Initial NO3-N content and net nitrification markedly increased in the opening within 2-6 m of each edge. Net ammonification did not exhibit obvious edge-related spatial patterns. Spatial patterns of nitrification appeared to be more closely related to spatial changes in substrate quality than to soil temperature and moisture. Results of the wavelet and DEI analyses provided quantification of locations and functional extents of edge effects.

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@ARTICLE { Redding20041018,
    AUTHOR = { Redding, T.E. and Hope, G.D. and Schmidt, M.G. and Fortin, M.-J. },
    TITLE = { Analytical methods for defining stand-clearcut edge effects demonstrated for N mineralization },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2004 },
    VOLUME = { 34 },
    NUMBER = { 5 },
    PAGES = { 1018-1024 },
    NOTE = { cited By 11 },
    ABSTRACT = { Edge effects are becoming an important forest management consideration, but information regarding the influence of edges on N cycling variables has not been well documented. In addition, the quantification of edge effects can benefit from the application of complementary spatial analysis methods. Forest floor N mineralization and environmental variables were intensively measured 5 years after harvest along transects crossing the north and south edges of a 1-ha clearcut, in a high-elevation Engelmann spruce - subalpine fir forest. Wavelet analysis and depth-of-edge influence (DEI) methods were used to locate and measure the spatial extent of edge effects on N mineralization. Then variance partitioning (partial redundancy analysis) was used to examine the influence of edges on N mineralization relative to the influence of other environmental factors. Initial NO3-N content and net nitrification markedly increased in the opening within 2-6 m of each edge. Net ammonification did not exhibit obvious edge-related spatial patterns. Spatial patterns of nitrification appeared to be more closely related to spatial changes in substrate quality than to soil temperature and moisture. Results of the wavelet and DEI analyses provided quantification of locations and functional extents of edge effects. },
    AFFILIATION = { Department of Geography, Simon Fraser University, Burnaby, BC V5A 1S6, Canada; British Columbia Ministry of Forests, Kamloops, BC V2C 2T7, Canada; Department of Zoology, University of Toronto, Toronto, Ont. M5S 3G5, Canada; Department of Biological Sciences, CW-405 Biological Sciences Centre, University of Alberta, Edmonton, Alta. T6G 2E9, Canada },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1139/x03-282 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-3042802404&doi=10.1139%2fx03-282&partnerID=40&md5=13435d12fd870187c5ceaecce14bb258 },
}

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