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2002 DRAFT Summary Report of Palmer's Goldenbush (Ericameria palmeri var. palmeri) Monitoring at the Otay-Sweetwater Unit of the San Diego National Wildlife Refuge, 2002 report

Lead author: David Griffin
We monitored populations of Palmer?s goldenbush (Ericameria palmeri var. palmeri) on the San Diego National Wildlife Refuge between October 4 and October 31, 2002. Palmer?s goldenbush is a rare, perennial, yellow-flowered shrub in the Family Asteraceae that occurs below 600 meters elevation along coastal drainages and dry valleys, in Diegan coastal sage scrub, and in mesic chaparral. According to the MSCP ?Biological Monitoring Guidelines?, Third Priority Covered Species, such as Palmer?s goldenbush require biological monitoring once every 5 years. The Guidelines recommend (require) using permanent photo plots for monitoring of Third Priority plant species. Although photo plot methods may provide some useful information such as areal extent of a species or changes in plant cover of a particular species, more valuable data such as population structure, plant phenology, and site attributes are required to determine the trends that make long-term monitoring effective. Because of these reasons we chose a more rigorous, yet simple method to monitor Palmer?s goldenbush on the Refuge.

2011 Biological Diversity Baseline Report FOR THE Lawrence and Barbara Daley Preserve County of San Diego report

The purpose of this Biological Diversity Baseline Report for the Lawrence and Barbara Daley Preserve is to provide the County of San Diego with information on existing biological conditions to assist in the development of Area Specific Management Directives. The approximately 597-acre1 Preserve is located in the south central portion of San Diego County, in the community of Dulzura, north and east of Highway 94 and south of Honey Springs Road. Technology Associates International Corporation (Technology Associates) assisted by the San Diego Natural History Museum, conducted baseline biological surveys at the Preserve on behalf of the County of San Diego Department of Parks and Recreation. Baseline surveys were conducted in the winter, spring, and summer of 2009-2010. Biologists conducted the following surveys to assess the current status of biological resources onsite: (1) mapping of vegetation communities, (2) a floral inventory including rare plant surveys, (3) butterfly inventory surveys, (4) pitfall trapping for amphibians, reptiles, and small mammals, (5) arroyo toad surveys, (6) aquatic herpetofauna surveys, (7) diurnal avian point count surveys, (8) nocturnal avian surveys, (9) acoustic bat surveys, (10) small mammal trapping, and (11) track and camera station surveys for medium and large mammals. Due to the 2007 Harris fire that burned all of the Preserve, results of these surveys may under-represent the diversity of plant and wildlife species that occupy the Preserve. Ten vegetation communities were mapped within the Preserve and consist of Diegan coastal sage scrub, coastal sage-chaparral scrub, southern mixed chaparral, native grassland, non-native grassland, southern riparian woodland, coast live oak woodland, eucalyptus woodland, disturbed habitat, and urban/developed habitat. The most abundant vegetation community on the Preserve is Diegan coastal sage scrub, which makes up approximately 417.20 acres or 70% of the total area. Floristic surveys documented 355 plant taxa occurring on site. These include both native and non-native species along with eleven sensitive (California Native Plant Society List 1-4) plant species, including: desert fragrance (Ambrosia monogyra), San Diego needlegrass (Achnatherum diegoensis), Palmer's sagewort (Artemisia palmeri), San Diego sunflower (Bahiopsis [Viguiera] laciniata), delicate clarkia (Clarkia delicata), Palmer's goldenbush (Ericameria palmeri var. palmeri), chocolate lil