Program To Assist In Tracking Critical Habitat - Spatial Decision Support Knowledge Portal

Program To Assist In Tracking Critical Habitat
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PATCH is a spatially explicit, individual-based, life history simulator designed to project populations of territorial terrestrial vertebrate species through time.

PATCH generates estimates of a wildlife population size, distribution, and trends. The model permits landscapes to change with time. Model inputs include species' habitat and area requirements, vital rates, and movement ability. Model outputs include tabular measures of population size, and maps of population distribution. Future version of PATCH will address a wider range of species life history traits, stressor scenarios, and species interactions.

Source Of Description

Wilhere, G., and N. H. Schumaker. 2001. A spatially realistic population model for informing forest management decisions. Pages 538-544 in D. H. Johnson, and T. A. O’Neil (eds), Wildlife-habitat relationships in Oregon and Washington. Oregon State University Press, Corvallis, OR.

URL

http://ecobas.org/www-server/rem/mdb/patch.html (No Longer Available)

Comment

PATCH’s outputs fall into two general categories: pattern-based metrics and demographic analyses. Pattern-based outputs include patch-by-patch descriptions of landscapes, assessments of the number, quality, and spatial orientation of breeding sites, and map-based estimates of the occupancy rate and the source-sink behavior of breeding habitat. PATCH’s principal demographic outputs include several measures of population size as a function of time, realized survival and fecundity rates (rates that reflect the limitations on a population imposed by habitat quality and landscape pattern), and assessments of the occupancy rate and source-sink behavior of the breeding sites present in a landscape. A principal feature of PATCH demographic simulations is the capacity to simulate landscape change through time. PATCH models landscape change by loading different territory maps at specified points in time. PATCH is especially suited for investigations that involve habitat specialists that move around in search of nest sites or feeding areas.

Domain Knowledge Modeling

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