FortinDrapeauJacquez1996

Référence

Fortin, M.-J., Drapeau, P., Jacquez, G.M. (1996) Quantification of the spatial co-occurrences of ecological boundaries. Oikos, 77(1):51-60.

Résumé

In this paper, we investigate spatial relationships between vegetation boundaries and environmental boundaries from a second-growth forest in southwestern Quebec, Canada. Four statistics that quantify the amount of direct spatial overlap and the mean minimum distance between boundaries are introduced and used to compute the degree of spatial co-occurrences between boundaries. The significance of these statistics is determined using randomized and restricted permutation tests. Boundaries based on tree species density are found to significantly overlap the locations of boundaries delineated by the environmental data at the study site. Significant overlap is also found using boundaries defined by tree presence absence data and environmental variables. Vegetation boundaries based on tree species density and on tree presence absence data are not, however, at the same locations. This suggests that for the study site the two types of vegetation boundaries (tree density and presence absence) reflect different responses to underlying environmental processes. Vegetation boundaries determined using species diversity and species richness, although spatially related to the presence absence boundaries, did not overlap the environmental boundaries. Results of the two permutation tests (randomized and restricted) agree only when the spatial relationship between the two boundary types is strong. Overall randomization is found to be a more conservative test for detecting boundary spatial relationships, rejecting the null hypothesis of no spatial relationship fewer times than the restricted permutation test.

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@ARTICLE { FortinDrapeauJacquez1996,
    AUTHOR = { Fortin, M.-J. and Drapeau, P. and Jacquez, G.M. },
    TITLE = { Quantification of the spatial co-occurrences of ecological boundaries },
    JOURNAL = { Oikos },
    YEAR = { 1996 },
    VOLUME = { 77 },
    PAGES = { 51-60 },
    NUMBER = { 1 },
    NOTE = { 00301299 (ISSN) Cited By (since 1996): 23 Export Date: 25 April 2007 Source: Scopus CODEN: OIKSA Language of Original Document: English Correspondence Address: Fortin, M.-J.; Departement de Biologie; Univ. Sherbrooke Sherbrooke, Que. J1K 2R1, Canada; email: mjfortin@courrier.usherb.ca References: Chesson, P.L., Coexistence of competitors in spatially and temporally varying environments: A look at the combined effects of different sorts of variability (1985) Theor. Popul. Biol., 28, pp. 263-287; Ferson, S., (1988) Are Competition Communities Stable Assemblages?, , Ph.D. Dissertation. Dept of Ecology and Evolution, State Univ. of New York at Stony Brook; Fortin, M.-J., (1992) Detection of Ecotones: Definition and Scaling Factors, , Ph.D. Dissertation. Dept of Ecology and Evolution, State Univ. of New York at Stony Brook; Edge detection algorithms for two-dimensional ecological data (1994) Ecology, 75, pp. 956-965; Drapeau, P., Delineation of ecological boundaries: Comparison of approaches and significance tests (1995) Oikos, 72, pp. 323-332; Hansen, A., Di Castri, F., (1992) Landscape Boundaries: Consequences for Biotic Diversity and Ecological Flaws, , Springer, New York; Hewitt, G.M., Hybrid zones-natural laboratories for evolutionary studies (1988) Trends Ecol. Evol., 3, pp. 158-166; Holland, M.M., SCOPE. MAB technical consultations on landscape boundaries: Report of a SCOPE/MAB workshop on ecotones (1988) Biology International Special Issue, 17, pp. 47-106; Risser, P.G., Naiman, R.J., (1991) Ecotones, , Chapman \& Hall, New York; Jacquez, G.M., The map comparison problem: Tests for the overlap of geographical boundaries (1995) Stat. Med., 14, pp. 2343-2361; Leduc, A., Drapeau, P., Bergeron, Y., Legendre, P., Study of spatial components of forest cover using partial Mantel tests and path analysis (1992) J. Veg. Sci., 3, pp. 69-78; Legendre, L., Legendre, P., (1983) Numerical Ecology. Developments in Environmental Modelling, p. 3. , Elsevier, Amsterdam; Legendre, P., Fortin, M.-J., Spatial pattern and ecological analysis (1989) Vegetatio, 80, pp. 107-138; Manly, B.F.J., (1991) Randomization and Monte Carlo Methods in Biology, , Chapman and Hall, London; Oden, N.L., Sokal, R.R., Fortin, M.-J., Goebl, H., Categorical wombling: Detecting regions of significant change in spatially located categorical variables (1993) Geographical Analysis, 25, pp. 315-336; Upton, G.J.G., Fingleton, B., (1985) Spatial Data Analysis by Example. Vol. 1: Point Pattern and Quantitative Data, 1. , Wiley, New York; Van Der Maarel, E., Ecotones and ecoclines are different (1990) J. Veg. Sci., 1, pp. 135-138; Wiens, J.A., Crawford, C.S., Gosz, J.R., Boundary dynamics: A conceptual framework for studying landscape ecosystems (1985) Oikos, 45, pp. 421-427. },
    ABSTRACT = { In this paper, we investigate spatial relationships between vegetation boundaries and environmental boundaries from a second-growth forest in southwestern Quebec, Canada. Four statistics that quantify the amount of direct spatial overlap and the mean minimum distance between boundaries are introduced and used to compute the degree of spatial co-occurrences between boundaries. The significance of these statistics is determined using randomized and restricted permutation tests. Boundaries based on tree species density are found to significantly overlap the locations of boundaries delineated by the environmental data at the study site. Significant overlap is also found using boundaries defined by tree presence absence data and environmental variables. Vegetation boundaries based on tree species density and on tree presence absence data are not, however, at the same locations. This suggests that for the study site the two types of vegetation boundaries (tree density and presence absence) reflect different responses to underlying environmental processes. Vegetation boundaries determined using species diversity and species richness, although spatially related to the presence absence boundaries, did not overlap the environmental boundaries. Results of the two permutation tests (randomized and restricted) agree only when the spatial relationship between the two boundary types is strong. Overall randomization is found to be a more conservative test for detecting boundary spatial relationships, rejecting the null hypothesis of no spatial relationship fewer times than the restricted permutation test. },
    KEYWORDS = { forest spatial analysis vegetation boundary Canada, Quebec },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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