Program To Assist In Tracking Critical Habitat

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 (No Longer Available)

For Application Domains

Biodiversity Conservation

Fish And Wildlife Management

Forest Management

Decision Problem Types Targeted

Status Assessment

Suitability Assessment

Used In Case Studies

Willamette Basin Alternative Futures Analysis

Domain Knowledge Modeling Area

Habitat Suitability

Landscape Analysis And Modeling

Population Dispersal

Population Viability

Planning And Decision Process Phases/Steps Served

Condition Analysis And Assessment

Domain Knowledge Process Model Development

Risk Analysis

Scenario Simulation And Comparison

Trend Analysis


Methods And Techniques Implemented


Systems Functional Components


Accepts Data Of Process Types

Biophysical Process

Output Type


Analysis Extent

All (User Defined Analysis Extent)

Regional Extent

Subregional Extent

Analysis Unit

Individual Object

Indicators Used

Forest Fragmentation

Species Abundance

Species Distribution

Species Viability

Supports Analysis Of Interdisciplinary Interactions

False ^^ Http://Www.W3.Org/2001/Xmlschema#Boolean



Windows 2000

Windows NT

Windows XP

Online Download Available

True ^^ Http://Www.W3.Org/2001/Xmlschema#Boolean

Developer Assistance Needed For Installation/Configuration

False ^^ Http://Www.W3.Org/2001/Xmlschema#Boolean



Development Status

Regularly Distributed

Tool Maker

The University Of Queensland

Information Source

National Commission On Science For Sustainable Forestry

Contact Person

Nathan H. Schumaker

Parent Categories

Software Tools And Models - All

Spatial Decision Support Systems


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.

Last Updated

2008-06-06T00:00:00Z ^^

Software Type

Spatial Decision Support Systems

Decision Process Activity Types Served

Condition Analysis And Assessment

Decision Alternatives Generation, Scenario Simulation

Domain Knowledge Modeling


Model Type

Evaluative Models

Simulation Models

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