1986
DESCRIPTION
1975. 1986. 1992. Note the increasing fragmentation of the natural habitat as a result of settlement. Such fragmentation can adversely affect the success of wildlife populations. FragStats. http://www.umass.edu/landeco/research/fragstats/fragstats.html. FRAGSTATS Overview. - PowerPoint PPT PresentationTRANSCRIPT
Note the increasing fragmentation of the natural habitat as a result of
settlement. Such fragmentation can adversely affect the success
of wildlife populations.
19861975
1992
FragStats
http://www.umass.edu/landeco/research/fragstats/fragstats.html
FRAGSTATS Overview
• Derives a set of useful landscape metrics
• Public domain code developed by Kevin McGarigal and Barbara Marks under U.S.F.S. funding
Situation
• FragStats only supporting 4.x from now on
• There tutorial data is in ArcGRID format
• Following FragStats instructions on adding support for ArcGRIDs results in:
• Only other formats supported are ASCII GRID and binary (neither appear to work)
FRAGSTATS Fundamentals
• PATCH… individual parcel (Polygon)
A single homogeneous landscape unitwith consistent vegetation characteristics,e.g. dominant species, avg. tree height,horizontal density ,etc.
A single Mixed Wood polygon(stand)
CLASS… sets of similar parcelsLANDSCAPE… all parcels within an area
FRAGSTATS FundamentalsPATCH… individual parcel (Polygon)
• CLASS… sets of similar parcels
All Mixed Wood polygons(stands)
LANDSCAPE… all parcels within an area
FRAGSTATS FundamentalsPATCH… individual parcel (Polygon)CLASS… sets of similar parcels
• LANDSCAPE… all parcels within an area “of interacting ecosystems”
e.g., all polygons within a given geographic area (landscape mosaic)
FRAGSTATS Output Metrics
• Area Metrics (6),
• Patch Density, Size and Variability Metrics (5),
• Edge Metrics (8),
• Shape Metrics (8),
• Core Area Metrics (15),
• Nearest Neighbor Metrics (6),
• Diversity Metrics (9),
• Contagion and Interspersion Metrics (2)
• …59 individual indices(US Forest Service 1995 Report PNW-GTR-351)