Bay Checkerspot Butterfly at Young Ranch
WRA has provided biological consulting services for the proposed Young Ranch residential development and ecological preserve on Coyote Ridge in Santa Clara County since 2007. WRA conducted baseline biological inventories including vegetation mapping, targeted wildlife surveys, rare plant surveys, invasive weed mapping, tree surveys, and wetland and stream delineation. The site contains large expanses of serpentine grassland home to listed species such as the Bay checkerspot butterfly (BCB), Santa Clara Valley dudleya, fragrant fritillary, Metcalf Canyon jewelflower, and most beautiful jewelflower. Other covered species at the site include California red legged frog, California tiger salamander and burrowing owl. WRA conducted a range of focused and protocol-level surveys to document the distribution and abundance of these species at the site, including 13 years of BCB monitoring.
Using information gained from the biological studies, WRA developed several GIS-based models used to help site the development in the most ecologically appropriate areas and developed management plans to help guide preservation of the nearly 2,000-acre preserve. WRA created a grazing model based on physical aspects of the site, rainfall levels, and USDA grazing data. WRA also created a GIS-based corridor model for BCB. These sensitive resources will be set aside as a natural preserve intended to be incorporated into the Reserve System for the Santa Clara Valley Habitat Plan. WRA is currently helping with invasive goat grass control at the site to preserve and enhance ranching resources.
Serpentine Grassland at Young Ranch