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Item 7.1 Att 4 (5) Ex A - Final_EACCS_Oct2010_Print - City of Dublin

Item 7.1 Att 4 (5) Ex A - Final_EACCS_Oct2010_Print - City of Dublin

Item 7.1 Att 4 (5) Ex A - Final_EACCS_Oct2010_Print - City of Dublin

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Appendix D<br />

Species Accounts<br />

Modeled Species Distribution in Study Area<br />

Model Assumptions<br />

Model Results<br />

Core Habitat—Denning and Movement<br />

All grassland land cover types and all oak woodlands within 500 feet from<br />

grasslands were considered suitable denning and foraging habitat for this<br />

species. Urban and suburban land cover types, and the area within the<br />

boundary created by Highways 580, 680 and 84 were excluded, as well as any<br />

areas within 200 m <strong>of</strong> highways (Gerrard et al. 2001). Small fragments <strong>of</strong><br />

habitat that were disconnected from contiguous habitat blocks were removed<br />

from the results to better represent actual movement potential for the species<br />

in a connected landscape.<br />

Additional modeling was conducted to determine the most likely routes that<br />

could be used by San Joaquin kit fox in the northeastern corner <strong>of</strong> the study<br />

area. This analysis took into account the importance <strong>of</strong> land cover, topography,<br />

and barriers created by roadways and canals on the movement tendencies <strong>of</strong><br />

the species. The intent was to determine how individuals could move through<br />

the study area between the northernmost extent <strong>of</strong> their range in Contra Costa<br />

County to areas in southern San Joaquin County, on the eastern side <strong>of</strong> the<br />

study area. The methodology is discussed below under wildlife linkages and the<br />

results are shown if Figure D-17.<br />

Low Quality Movement Habitat<br />

Areas that the San Joaquin kit fox may use occasionally for movement include<br />

developed agriculture, cropland, ruderal, and ruderal-residential land cover<br />

types within one mile <strong>of</strong> core habitat. These were intended to represent areas<br />

that individuals might pass through while moving between other more suitable<br />

habitat types.<br />

Figure D-17 in Appendix D shows the modeled potential habitat <strong>of</strong> the San<br />

Joaquin kit fox within the study area. Potential core habitat encompasses a large<br />

portion <strong>of</strong> the area, but all occurrences are in the northern portion. Very little<br />

habitat is within the low quality movement habitat. Since there are so few<br />

documented occurrences <strong>of</strong> the kit fox from within the study area it is difficult<br />

to state what the accuracy <strong>of</strong> the model is relative to actual presence <strong>of</strong> the<br />

species.<br />

East Alameda County Conservation Strategy D-52 October 2010<br />

ICF 00906.08

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