Patch Generation Model What we’ve done so far Now, step 4 Summary of approach

Patch Generation Model What we’ve done so far Now, step 4 Summary of approach www.phwiki.com

Patch Generation Model What we’ve done so far Now, step 4 Summary of approach

Oswald, Ed, Contributing Writer has reference to this Academic Journal, PHwiki organized this Journal GIS & Environmental Protection Richard Church University of Cali as long as nia, Santa Barbara April 2008 Case studies of the San Joaquin Kit Fox in addition to the Cali as long as nia Spotted Owl Real Example: modeling the spatial requirements of the San Joaquin Kit Fox, an Endangered species. Objective: sustain a population of Kit Fox in a planning region of 2 counties Protecting the SJKF 1

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The SJKF has been listed as endangered as long as the last 20 years. The SJKF: Questions Is their habitat threatened How much desired habitat area is needed Where should l in addition to be protected as long as sustaining the SJKF The requirements of the SJKF were determined by a panel of experts. The panel described a “model” as long as mapping habitat suitability as long as the SJKF as well as the needs of a demographic unit i.e. a mated pair of kit fox. How much habitat is needed Each mated pair needs 4 square miles of the best habitat or an Equivalently larger area of lower quality habitat L in addition to use data is given as a raster (grid cells) that are 4 ha in size (200m.), so approximately 256 cells of the highest quality habitat are required as long as a mated pair. Their goal was to protect enough habitat as long as 6-20 mated pairs Where have the Kit Fox been sighted

Habitat suitability can be based upon a l in addition to use/cover map Expert Panel Approach add in neighborhood effects

Final suitability values grid: “A combined map of intrinsic & neighborhood values” Habitat planning in addition to the SJKF From the work described in the previous slides, we know what is potential kit fox habitat. The questions is: Which areas should we set aside in order to protect in addition to enhance kit fox populations The kit fox does not adhere to parcel boundaries, isn’t concerned with ownership, in addition to is probably oblivious to the boundaries of watersheds. Just how would the Kit fox view the l in addition to scape The panel of experts stated that a mated pair of kit fox requires the equivalent of 256 cells of high quality habitat or 256×6= 1536 habitat quality points. Any feasible patch must be relatively compact in addition to contain 1536 habitat quality points One approach is to develop a process to generate possible kit fox territories or patches .,

Patch Generation Model Given a habitat suitability map A patch “size equivalent” which is a size in addition to quality value large enough to support a mated pair of Kit Fox The Patch model: starts with a seed cell, in addition to iteratively adds perimeter cells At each iteration it adds a percentage of the top-valued perimeter cells to the patch (typically 10-20%), until the patch has the desired size in addition to contains a minimum amount of habitat quality points The value of adding a cell to the patch is calculated as the suitability score plus a weight times the number of edges that the cell shares with the patch 1) Start with seed cell; exp in addition to out to a 3×3, 5×5, or some other size 2) Along the perimeter. add the top x% of the cells (in terms of habitat value in addition to connectivity measure) 3) Continue building process until the patch meets minimum required elements of size habitat value points, etc. Repeat process as long as many seed cells, in addition to Generate hundreds if not thous in addition to s of patches Example Perimeter

Cells taken from perimeter as an iteration of patch growth Valued equally as long as addition to the patch. Teeth appearance created due to r in addition to om ordering of perimeter cells. Valued more than the other 2 cells because of connectivity (habitat value also = 6, plus shares 2 edges with existing patch). cell’s value = kit fox habitat value + delta sides shared with cells that have already been chosen as long as the patch Seed cell Poor habitat Open grassl in addition to (high value) Open grassl in addition to (high value) Open grassl in addition to (high value) Poor habitat Cali as long as nia Spotted Owl

Cali as long as nia Spotted Owl Iteration 1 Spotted owl example of Patch growing Iteration 30

Iteration 60 Iteration 90 Iteration 116 – FINISHED (7251 points) Has enough size in addition to quality to support the owl nest site

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Iteration 1 An example with greater emphasis on compactness Iteration 30 Iteration 60

Iteration 90 Iteration 120 Iteration 150

Reserve Design as long as threatened biological elements Richard Church University of Cali as long as nia, Santa Barbara April 2008 Case studies of the San Joaquin Kit Fox in addition to the Cali as long as nia Spotted Owl

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