GLAMS: A Graphical Method for Capturing Land and Water Management Practices in Agroecosystems

Modification of native ecosystems through land use can affect the biophysical functioning of agroecosystems, with spatial arrangement (configuration) through time often determining the degree to which landscapes experience dysfunctional states. An improved understanding is needed of how spatial and...

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Veröffentlicht in:Ecosystems (New York) 2007-04, Vol.10 (3), p.432-447
Hauptverfasser: Ryan, J. G, McAlpine, C. A, Ludwig, J. A
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McAlpine, C. A
Ludwig, J. A
description Modification of native ecosystems through land use can affect the biophysical functioning of agroecosystems, with spatial arrangement (configuration) through time often determining the degree to which landscapes experience dysfunctional states. An improved understanding is needed of how spatial and temporal patterns in land use affect ecohydrological dysfunctions, such as how landscapes leak or fail to retain water and soil, at scales relevant to farm management. We develop and apply a Graphical LAndscape Map Survey method, or 'GLAMS', for measuring changes in landscape function based upon a 3D graphic of a hypothetical sub-catchment. GLAMS was applied within four Landcare Groups comprised of farmers from the Western Catchments of Southeast Queensland, Australia. The aim was to capture the behaviors of farmers who manage land use under natural variations in precipitation, especially extended dry periods, and with the associated risks from ecohydrologically dysfunctional or 'leaky' landscapes. GLAMS provided variable spatial and temporal resolution which allowed quantification of the land use responses for three different property sizes: (1) small, less than 100 ha; (2) medium, 100-500 ha; and (3) large, larger than 500 ha. Responses were quantified using Bayesian Belief Networks to provide probability estimates of the likelihood of a given action, taking place within a particular part of the landscape, considering both climatic and ecohydrological risks. The findings indicated that GLAMS was more intuitive to farmers than traditional question-based surveys, resulting in a low cost technique that is rapid to implement while providing spatially explicit information relevant to farm and catchment management.
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subjects Agricultural ecosystems
Agricultural management
Agroecosystems
Agroforestry
Animal and plant ecology
Animal, plant and microbial ecology
Applied ecology
Bayesian Belief Networks
Biological and medical sciences
Catchments
Conservation, protection and management of environment and wildlife
Ecohydrology
expert opinion
Farm management
Farmers
Freshwater
Fundamental and applied biological sciences. Psychology
General aspects
graphical landscape map
Land use
land use management
Landscape
Landscapes
Pastures
Sustainable agriculture
Synecology
Water management
Water quality
Watersheds
title GLAMS: A Graphical Method for Capturing Land and Water Management Practices in Agroecosystems
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