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	Provedor de dados Ecology and Society (2) Autor Allen, Craig R; U.S. Geological Survey; Nebraska Cooperative Fish and Wildlife Research Unit; allencr@unl.edu (1) Allen, Craig R; University of Nebraska, USA; allencr@unl.edu (1) Garmestani, Ahjond S; U.S. Environmental Protection Agency; garmestani.ahjond@epa.gov (1) Stow, Craig; NOAA Great Lakes Environmental Research Laboratory (GLERL); Craig.Stow@noaa.gov (1) Wardwell, Donald; Nebraska Cooperative Fish and Wildlife Research Unit; don_wardwell@hotmail.com (1) Palavra-chave Textural discontinuity hypothesis (2) Body mass (1) Breeding Bird Survey (1) Discontinuities (1) Everglades (1) Phase transition (1) Resilience (1) Scale (1) Scalebreaks (1) Mais... Tipo do documento Peer-Reviewed Insight (1) Peer-Reviewed Reports (1) Ano 2009 (1) 2007 (1) País Canada (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Variability in Population Abundance is Associated with Thresholds between Scaling Regimes Ecology and Society Wardwell, Donald; Nebraska Cooperative Fish and Wildlife Research Unit; don_wardwell@hotmail.com; Allen, Craig R; U.S. Geological Survey; Nebraska Cooperative Fish and Wildlife Research Unit; allencr@unl.edu. Discontinuous structure in landscapes may result in discontinuous, aggregated species body-mass patterns, reflecting the scales of structure available to animal communities within a landscape. The edges of these body-mass aggregations reflect transitions between available scales of landscape structure. Such transitions, or scale breaks, are theoretically associated with increased biological variability. We hypothesized that variability in population abundance is greater in animal species near the edge of body-mass aggregations than it is in species that are situated in the interior of body-mass aggregations. We tested this hypothesis by examining both temporal and spatial variability in the abundance of species in the bird community of the Florida... Tipo: Peer-Reviewed Reports Palavras-chave: Body mass; Breeding Bird Survey; Everglades; Phase transition; Scale; Textural discontinuity hypothesis. Ano: 2009 Evaluating Discontinuities in Complex Systems: Toward Quantitative Measures of Resilience Ecology and Society Stow, Craig; NOAA Great Lakes Environmental Research Laboratory (GLERL); Craig.Stow@noaa.gov; Allen, Craig R; University of Nebraska, USA; allencr@unl.edu; Garmestani, Ahjond S; U.S. Environmental Protection Agency; garmestani.ahjond@epa.gov. The textural discontinuity hypothesis (TDH) is based on the observation that animal body mass distributions exhibit discontinuities that may reflect the texture of the landscape available for exploitation. This idea has been extended to other complex systems, hinting that the identification and quantification of discontinuities in the distributions of appropriate variables may provide clues to emergent system properties such as resilience. We propose a discontinuity index, based on the vector norm of the full assemblage of observed discontinuities, as a means to quantify and compare this characteristic among systems. We also evaluate four methods to identify the number and location of the most prominent discontinuities. Although results of the four methods... Tipo: Peer-Reviewed Insight Palavras-chave: Discontinuities; Textural discontinuity hypothesis; Resilience; Scalebreaks. Ano: 2007 Registros recuperados: 2 Primeira ... 1 ... Última

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