MartinBradleyKimmins2001

Référence

Martin, W.L., Bradley, R.L., Kimmins, J.P. (2001) Post-clearcutting chronosequence in the B.C. Coastal Western Hemlock Zone: I. Changes in forest floor mass and N storage. Journal of Sustainable Forestry, 14(1):1-22.

Résumé

The depth, mass, and N-capital of the forest floor were measured in three plots in a 400-year-old forest of Pacific silver fir (Abies amabilis [Dougl.] Forbes), western hemlock (Tsuga heterophylla [Raf.] Sarg.) and western red cedar (Thuja plicata Donn) on Southern Vancouver Island, as well as in three plots in each of four neighboring unslashburned clearcuts ranging in ages from 3 to 26 years old. Forest floor depth, mass and N content did not differ significantly during the first three years following clearcutting but had dropped by 35% to 40% of pre-clearcut values by the sixth post-clearcutting year. Although values of these ecosystem characteristics gradually increased thereafter, they were still about 20% below pre-clearcut values by year 26. Re-measurements of the 3-year-old, 6-year-old and 10-year-old sites after two years, as well as of 6 independent neighboring sites, confirmed that each of the five intensively studied sites were representative members of the same chronosequence. Average mass loss of cellulose disks placed in the three younger clearcuts was two-to-four times greater than mass loss in the 26-year-old clearcut and 400-year-old forest sites, suggesting that the decrease in forest floor mass was not only attributable to lower rates of litter input but also to changes in litter decomposition rates. The average seasonal moisture content was higher in the 4-year-old clearcut than in the other sites, and the average daily air and soil temperatures were higher in the 10-year-old clearcut than in the old forest stand. The change in micro-climate was believed to be responsible for increasing decomposition rates in the younger three clearcuts. We conclude that forest floor N is quite dynamic during stand establishment.

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@ARTICLE { MartinBradleyKimmins2001,
    AUTHOR = { Martin, W.L. and Bradley, R.L. and Kimmins, J.P. },
    TITLE = { Post-clearcutting chronosequence in the B.C. Coastal Western Hemlock Zone: I. Changes in forest floor mass and N storage },
    JOURNAL = { Journal of Sustainable Forestry },
    YEAR = { 2001 },
    VOLUME = { 14 },
    PAGES = { 1-22 },
    NUMBER = { 1 },
    NOTE = { 10549811 (ISSN) Cited By (since 1996): 5 Export Date: 26 April 2007 Source: Scopus Language of Original Document: English Correspondence Address: Bradley, R.L.; Departement de Biologie; Universite de Sherbrooke Sherbrooke, Quebec J1K 2R1, Canada; email: robert.bradley@courrier.usherb.ca References: Aber, J.D., Botkin, D.B., Melillo, J.M., Predicting the effects of different harvesting regimes on forest floor dynamics in northern hardwoods (1978) Can. J. For. Res, 8, pp. 306-315; 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. Manag, 41, pp. 249-263; Bradley, R.L., Fyles, J.W., Interactions between tree seedling roots and humus forms in the control of soil C and N cycling (1996) Biol. Fertil. Soils, 23, pp. 70-79; Chang, S.X., Preston, C.M., Weetman, G.F., Soil microbial biomass and microbial and mineralizable N in a clear-cut chronosequence on northern Vancouver Island, British Columbia (1995) Can. J. For. Res, 25, pp. 1596-1607; Cole, D.W., Van Miegroet, H., Chronosequences: A technique to assess ecosystem dynamics (1989) Research Strategies for Long-Term Productivity Proceedings, IEA/BE A3 Workshop, pp. 5-23. , W.J. Dyck and C.A. Mees (Eds.). Seattle, WA, August, 1988. IEA/BE Report No.8. Forest Research Institute, Rotorua, New Zealand, Bull. 152; (1978) The Canadian System of Soil Classification, 1646, p. 164. , C.S.S.C. Can. Dept. Agric., Publ. Ottawa; Feller, M.C., Kimmins, J.P., Scoullar, K.A., FORCYTE-10: Calibration data and simulation of potential long-term effects of intensive forest management on site productivity, economic performance, and energy benefit/cost ratio (1983) IUFRO Symposium on Forest Site and Continuous Productivity, , R. Ballard and S.P. 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Sci., University of British Columbia, Vancouver; Melillo, J.M., Aber, J.D., Linkins, A.E., Ricca, A., Fry, B., Nadelhoffer, K.J., Carbon and nitrogen dynamics along the decay continuum: Plant litter to soil organic matter (1989) Plant Soil, 115, pp. 189-198; Morris, D.M., Kimmins, J.P., Duckert, D.R., The use of soil organic matter as a criterion of the relative sustainability of forest management alternatives: A modelling approach using FORECAST (1997) For. Ecol. Manag, 94, pp. 61-78; Northcote, K.E., Bedrock geology of Vancouver Island (1981) Forest Soils of the Douglas-fir Region, pp. 59-66. , P.E. Heilman, H.W. Anderson and D.M. Baumgartner (Editors), Washington State University Cooperative Extension Service, Pullman, WA; Pojar, J., Klinka, K., Demarchi, D.A., Coastal Western Hemlock zone (1991) Ecosystems of British Columbia, pp. 95-111. , D. Meidinger and J. Pojar (Editors.), Research Branch, Ministry of Forests, Victoria, B.C; Prescott, C.E., Effects of clearcutting and alternative silvicultural systems on rates of decomposition and nitrogen mineralization in a coastal montane coniferous forest (1997) For. Ecol. Manag, 95, pp. 253-260; Prescott, C.E., Corbin, J.P., Parkinson, D., Immobilization and availability of N and P in the forest floors of fertilized Rocky Mountain coniferous forests (1992) Plant Soil, 143, pp. 1-10; Prescott, C.E., Weetman, G.F., Barker, J.E., Causes and amelioration of nutrient deficiencies in cutovers of cedar-hemlock forests in coastal British Columbia (1996) For. Chron, 72, pp. 293-302; Qian, H., Klinka, K., Spatial variability of humus forms in some coastal forest ecosystems of British Columbia (1995) Ann. Sci. For, 52, pp. 653-666; Ruark, G.A., Bockheim, J.G., Biomass, net primary production and nutrient distribution for an age-sequence of Populus tremuloides ecosystems (1988) Can. J. For. 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IEA/BE Report No. 8. Forest Research Institute, Rotorua, New Zealand, Bull 152; Wilde, S.A., Patzer, W.E., The role of soil organic matter in reforestation (1940) J. Am. Soc. Agron, 32, pp. 551-562; Yarie, J., Effects of selected forest management practices on environmental parameters related to successional development on the Tanana River floodplain, interior Alaska (1993) Can. J. For. Res, 23, pp. 1001-1014; Yarie, J., Viereck, K., Van Cleve, K., Dyrness, C.T., The chronosequence as an aid to understanding the long-term consequences of management activities (1989) Research Strategies for Long-Term Productivity, Proceedings, IEA/BE A3 Workshop, pp. 25-38. , W.J. Dyck and C.A. Mees (Eds.). Seattle, WA, August, 1988. IEA/BE Report No. 8. Forest Research Institute, Rotorua, New Zealand, Bull. 152; Yin, X., Perry, J.A., Dixon, R.K., Influence of canopy removal on oak forest floor decomposition (1989) Can. J. For. Res, 19, pp. 204-214. },
    ABSTRACT = { The depth, mass, and N-capital of the forest floor were measured in three plots in a 400-year-old forest of Pacific silver fir (Abies amabilis [Dougl.] Forbes), western hemlock (Tsuga heterophylla [Raf.] Sarg.) and western red cedar (Thuja plicata Donn) on Southern Vancouver Island, as well as in three plots in each of four neighboring unslashburned clearcuts ranging in ages from 3 to 26 years old. Forest floor depth, mass and N content did not differ significantly during the first three years following clearcutting but had dropped by 35% to 40% of pre-clearcut values by the sixth post-clearcutting year. Although values of these ecosystem characteristics gradually increased thereafter, they were still about 20% below pre-clearcut values by year 26. Re-measurements of the 3-year-old, 6-year-old and 10-year-old sites after two years, as well as of 6 independent neighboring sites, confirmed that each of the five intensively studied sites were representative members of the same chronosequence. Average mass loss of cellulose disks placed in the three younger clearcuts was two-to-four times greater than mass loss in the 26-year-old clearcut and 400-year-old forest sites, suggesting that the decrease in forest floor mass was not only attributable to lower rates of litter input but also to changes in litter decomposition rates. The average seasonal moisture content was higher in the 4-year-old clearcut than in the other sites, and the average daily air and soil temperatures were higher in the 10-year-old clearcut than in the old forest stand. The change in micro-climate was believed to be responsible for increasing decomposition rates in the younger three clearcuts. We conclude that forest floor N is quite dynamic during stand establishment. },
    KEYWORDS = { Chronosequence Clearcutting Coastal Western Hemlock Forest floor Cellulose Ecosystems Moisture Nitrogen Chronosequence Forest floor mass Forestry chronosequence clearcutting forest floor nitrogen Canada },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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