کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1050458 945693 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multiscale heterogeneity map and associated scaling profile for landscape analysis
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Multiscale heterogeneity map and associated scaling profile for landscape analysis
چکیده انگلیسی

Spatial heterogeneity, in the wide sense of pattern complexity and variability, appears to be one of the dominant influences of ecological functions and processes. The most widely used quantification of heterogeneity in environmental studies is based on derived Shannon information theory indices. Yet, such heterogeneity index is not able to quantify the surface patterns of a landscape with a fully explicit scheme at each place and scale of the landscape. The objective of this work is to propose a methodology to bypass this disadvantage and to capture the local and scaling variations of the landscape. The method developed here combines a multiscale heterogeneity map (MHM) with a heterogeneity profile (HP) averaging at each place (respectively, at each scale) the spatial information contained in the landscape. Confidence levels have been estimated on the basis of a simple neutral landscape model to detect significant non-random heterogeneity fluctuations. This methodology is illustrated on both categorical (patchy) and continuous (pixelised) real landscapes: a heterogeneous agricultural landscape in Brittany and a spring phytoplankton bloom in north Atlantic. Heterogeneity analyses of both image types can simultaneously reveal subtle quantitative and qualitative features (gradients, boundaries, random or patchy patterns at successive scales) linked to ecological processes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Landscape and Urban Planning - Volume 82, Issue 3, 24 September 2007, Pages 95–102
نویسندگان
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