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Napa County
Baseline Data Report: Biological Inventory
Presentation to the
Watershed Information Center & Conservancy
- f Napa County (WICC)
February 24, 2005
Baseline Data Report: Biological Inventory Presentation to the - - PDF document
Baseline Data Report: Biological Inventory Presentation to the - - PDF document
Napa County Baseline Data Report: Biological Inventory Presentation to the Watershed Information Center & Conservancy of Napa County (WICC) February 24, 2005 Project Purpose Project Purpose Biological Resources Inventory Biological
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Inventory Content Inventory Content
UC Davis ICE Land Cover Map
Unique regional data set 59 land cover types, almost 30,000 polygons 2.5 acre MMU, based on 1993 air photos
7 broad biological communities
key ecological processes management issues
13 Evaluation Areas
sensitive biological resources management issues
Inventory Content Inventory Content
Other elements
regulatory setting special status species wildlife movement care and feeding of biological database
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Selected Findings Selected Findings
81 plant species (more species are on a watchlist)
85% have less then 10 known occurrences 2 plants only found in Napa County
60 wildlife species
2/3 of the special status wildlife species are birds
9 fish species 29 sensitive communities Every natural community has associated special status species
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Selected Findings Selected Findings
Some communities are especially critical to special status species Serpentine grasslands:
Associated with 36% of the County’s special
status plant species
Mapped on 0.4% of the County’s area
Species-Community Associations Species-Community Associations
9.2% 16% 25% Serpentine Chaparral 1.6% 38% 11% Riparian Woodland 0.4% 31% 36% Serpentine Grassland 10.6% 31% 47% Grassland 8.5% 33% 47% Coniferous 0.7% 26% 5% Salt Marsh % of County Area % of SS Wildlife % of SS Plants Community
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Case Study 1: Western Mountains Case Study 1: Western Mountains
40% oak woodlands- SOD is an issue Valuable riparian habitats 25% Doug-fir/Redwoods Fire regime/fuel management is an issue Most occurrences of Northern spotted owl Potential GP EIR issue: constrained north-south wildlife movement Source:http://kellylab.berkeley.edu/OakMapper/
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Case Study 2: Knoxville Case Study 2: Knoxville
Dominated by chaparral
serpentine chaparral (30%)
- ther chaparral (22%)
40% of County’s serpentine grassland Oak woodlands- 30% Putah and Eticuera Creeks Sensitive communities- McNab cypress, Brewer willow Special-status species “hotspot”
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Wildlife Movement Wildlife Movement
Modeled movement “cost” by land cover type Range 1 to 10 Can evaluate regional effects on movement from different development scenarios
Wildlife Movement Wildlife Movement
Least Cost Path Analysis Evaluate movement for wildlife sensitive to human disturbance Can combine with barriers
- r hazards (e.g., roads)
Can overlay different development or zoning scenarios
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Biological Database Content Biological Database Content
GIS Maps
Vegetation types Special Status Species Occurrences Wildlife movement predictions Vernal pool layer
Special Status Species Characteristics
Habitat preferences and distribution Regulatory status Plant blooming time- scheduling surveys
Linkage between GIS maps and Species Characteristics
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Database Uses Database Uses
Initial Site Planning
Biological Constraints
- Species, habitats, communities
- Facilitates avoidance and minimization of
impacts
Survey needs- which species at what season Impact Analysis Mitigation Planning Provides focus for required
site surveys
Database Uses Database Uses
Regional Planning
Conservation & Open Space Planning Transportation/Infrastructure planning General Plan Updates Specific Plans Program EIRs Policy development
and analysis
Fuels Management
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Database Users Database Users
City and County Planners Project Applicants’ Consultants Land Trusts and Other Conservation Organizations State/Federal/Local Agencies Landowners Universities Community members
DEMO DEMO
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Database Maintenance Database Maintenance
Database is only as good as the data contained in it Updates Needed
CNDDB (every 6 months) Ag/Development (every 2 years) Recovery after wildfires (as needed) Vernal pool data (every 5 years) New unique datasets (as available) Special status species regulatory status Refinement of species distributions with new data
Conclusions Conclusions
Biological Resources Inventory has wide application
Initial site planning Regional planning Public information