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A platform for research: civil engineering, architecture and urbanism
Potential responses of landscape boundaries to global environmental change
Global change is likely to affect the location, size, shape, or composition of landscape boundaries. Neutral models were used to study two general mechanisms by which landscape boundaries may respond to global change: (1) disturbance regimes may change in response to climate, leading to rapid alterations in landscape structure, and (2) in the absence of disturbance, suitable habitat for different species may move gradually and directionally. The spread of disturbance was simulated as a function of the proportion of the landscape occupied by a disturbance-prone habitat and the frequency and intensity of a habitat-specific disturbance. The effects of changing disturbance regimes on landscape boundaries were different in connected and fragmented landscapes. In connected landscapes, an increase in disturbance intensity caused landscape boundaries to decrease. In landscapes that were fragmented, an increase in disturbance frequency resulted in a decrease in landscape boundaries. Habitat displacement and species migration were simulated as a function of the proportion of half of a landscape occupied by a community, migration, extinction, and the rate at which potential habitat is displaced. 39 refs., 8 figs., 2 tabs.
Potential responses of landscape boundaries to global environmental change
Global change is likely to affect the location, size, shape, or composition of landscape boundaries. Neutral models were used to study two general mechanisms by which landscape boundaries may respond to global change: (1) disturbance regimes may change in response to climate, leading to rapid alterations in landscape structure, and (2) in the absence of disturbance, suitable habitat for different species may move gradually and directionally. The spread of disturbance was simulated as a function of the proportion of the landscape occupied by a disturbance-prone habitat and the frequency and intensity of a habitat-specific disturbance. The effects of changing disturbance regimes on landscape boundaries were different in connected and fragmented landscapes. In connected landscapes, an increase in disturbance intensity caused landscape boundaries to decrease. In landscapes that were fragmented, an increase in disturbance frequency resulted in a decrease in landscape boundaries. Habitat displacement and species migration were simulated as a function of the proportion of half of a landscape occupied by a community, migration, extinction, and the rate at which potential habitat is displaced. 39 refs., 8 figs., 2 tabs.
Potential responses of landscape boundaries to global environmental change
M. G. Turner (author) / R. H. Gardner (author) / R. V. O'Neill (author)
1990
35 pages
Report
No indication
English
Ecology , Meteorological Data Collection, Analysis, & Weather , Air Pollution & Control , Climates , Environment , Greenhouse Effect , Plants , Biological Extinction , Carbon Dioxide , Communities , Disturbances , Ecosystems , Global Aspects , Mathematical Models , Migration , Modifications , Qualitative Chemical Analysis , Sensitivity , Spatial Distribution , Time Dependence , Variations , Meetings , Climatic changes , Landscaping , Air pollution , Environmental effects , EDB/540120
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