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Survey results for San Diego thornmint at Sabre Springs, Black Mountain Ranch, Mission Trails, Penasquitos Canyon Preserve in 2003.

Survey results for San Diego thornmint at Sabre Springs, Black Mountain Ranch, Mission Trails, Penasquitos Canyon Preserve in 2004.

Introduction: San Diego thornmint (Acanthomintha ilicifolia) is an endangered plant species that is found in clay soils within the County of San Diego. It is an annual herb that blooms between April and June. The surveys conducted are listed in Table 1 below. The methodology and results of the monitoring are detailed below. The goal of the effort was to continue long-term monitoring of San Diego thornmint under the Multiple Species Conservation Program (MSCP). McMillan Biological Consulting also conducted baseline surveys in May 2001 for the Otay Lakes population. Monitoring data for these baseline surveys is currently being compiled and will be available in late 2001. Previous surveys have been conducted by MSCP staff, Mike Kelly, and other volunteers in Sabre Springs, Black Mountain, and Peñasquitos Canyon. Additional surveys in Peñasquitos Canyon and Sabre Springs were also conducted by Ogden Environmental (1993).

The City of San Diego (City) contracted with URS to conduct protocol presence/absence surveys for California gnatcatcher. Nine sites located throughout the City?s MSCP preserve were surveyed to determine presence of California gnatcatcher at each site in spring of 2001. The sites were located at Lake Hodges, San Pasqual Valley, Black Mountain, Los Penasquitos Canyon, Mission Trails Regional Park, Spooner?s Mesa, Otay Mesa/Spring Canyon, Lower Otay Reservoir, and Marron Valley. Gnatchaters were detected at all of the sites.

Introduction: San Diego thornmint (Acanthomintha ilicifolia) is an endangered plant species that is found in clay soils within the County of San Diego. It is an annual herb that blooms between April and June. Monitoring for this plant in Penasquitos Canyon, Black Mountain Ranch, and Sabre Springs was conducted on May 3, 2000 by Holly Boessow, Keith Greer, Cindy Burrascano, Mike Kelly, and Pat Watkins. The surveys within Sabre Springs were completed by Mike Kelly on May 6, 2000. The methodology and results of the monitoring are detailed below. The goal of the effort was to establish baseline data for long-term monitoring of San Diego thornmint under the Multiple Species Conservation Program (MSCP). Previous surveys in Penasquitos Canyon and Black Mountain Ranch have been completed by Mike Kelly (see attached). Additional surveys in Penasquitos Canyon and Sabre Springs were also conducted by Ogden Environmental (1993).

Introduction: San Diego thornmint (Acanthomintha ilicifolia) is an endangered plant species found in clay soils within the County of San Diego. It is an annual herb that blooms between April and June. Surveys were conducted by City staff on April 16, 2004 and May 21, 2004 at Otay Lakes (see attached map). Surveys were also conducted by Friends of Los Penasquitos Canyon Preserve (Mike Kelly and other volunteers) at Mission Trails Regional Park, Sabre Springs, Black Mountain, and Penasquitos Canyon. Monitoring reports for the volunteer survey effort are attached. The methodology and results of the monitoring are detailed below. The goal of the effort was to continue long-term monitoring of San Diego thornmint under the Multiple Species Conservation Program (MSCP). McMillan Biological Consulting conducted baseline surveys in May 2001 for the Otay Lakes population. Previous surveys have been conducted by MSCP staff, Mike Kelly, and other volunteers in Sabre Springs, Black Mountain, and Penasquitos Canyon. Additional surveys in Penasquitos Canyon and Sabre Springs were also conducted by Ogden Environmental (1993).

Introduction: San Diego thornmint (Acanthomintha ilicifolia) is an endangered plant species found in clay soils within the County of San Diego. It is an annual herb that blooms between April and June. Surveys were conducted by City staff on April 23, 2003 at Otay Lakes (see attached map). Surveys were also conducted by Friends of Los Peñasquitos Canyon Preserve (Mike Kelly and other volunteers) at Mission Trails Regional Park, Sabre Springs, Black Mountain, and Peñasquitos Canyon. Monitoring reports for the volunteer survey effort are attached. The methodology and results of the monitoring are detailed below. The goal of the effort was to continue long-term monitoring of San Diego thornmint under the Multiple Species Conservation Program (MSCP). McMillan Biological Consulting conducted baseline surveys in May 2001 for the Otay Lakes population. Previous surveys have been conducted by MSCP staff, Mike Kelly, and other volunteers in Sabre Springs, Black Mountain, and Peñasquitos Canyon. Additional surveys in Peñasquitos Canyon and Sabre Springs were also conducted by Ogden Environmental (1993).