Table 2. Extent of dominant habitat types in each study area and the conservation objectives. For Elkhorn Slough, conservation objectives were defined by the Elkhorn Slough Foundation. Identified habitat extents were then used in the MARXAN run to identify the regional conservation design. For Pleasant Grove, we defined the habitat conservation targets. The target conservation amount for annual grasslands equals the middle of the three percentages shown. In the Pleasant Grove study, these conservation target levels were used in one of two MARXAN runs that defined the suitability of ownership parcels for the regional conservation design. The highest parcel value derived either from the MARXAN runs or the connectivity modeling was then used in the regional conservation design. This design was then used as a boundary within which the mitigation needs exercise ranked the suitability of parcels.

Habitat Type Total Hectares % Protected Target % Total Conservation Target
Elkhorn Slough
Dune Scrub 53.4 82 95 50.6
Mudflat 485.2 86 95 460.9
Saltmarsh 459.7 72 95 437.1
Saltwater 241.2 71 90 217.3
Freshwater 78.5 19 75 58.7
Freshwater Wetlands 245.6 30 75 184.1
Maritime Chaparral 950.6 24 75 713.1
Riparian 337.9 14 65 219.7
Conifer 40.5 6 25 10.1
Eucalyptus 803.3 7 30 240.8
Grassland 7006.3 8 45 3152.9
Coast Live Oak Woodland 4909.6 10 50 2454.8
Sage Scrub 363.8 13 50 181.7
Rock 1.2 0 10 0.0
Disturbed 4671.3 8 0 0.0
 
Pleasant Grove
Annual Grassland 43 020 9.4 25 10 755.0
Blue Oak–Foothill Pine 495 20.2 50 247.5
Blue Oak Woodland 1463 9.4 50 731.5
Freshwater Emergent Wetland 4586 23.7 50 2293.0
Montane Hardwood–Conifer 3 0 50 1.5
Montane Hardwood 806 4.7 50 403.0
Valley Oak Woodland 2170 0 50 1085.0
Valley Foothill Riparian 2400 23.6 50 1200.0
Unknown Conifer Type 53 3.8 50 26.5
Unknown Shrub Type 198 9.1 50 99.0
Vernal Pool Complex 21 629 8.1 50 10 814.5