Creekside Science

Creekside Science completes 30 year review of San Bruno Mountain Habitat Conservation Plan

In Uncategorized on November 6, 2015 at 1:43 pm


This fall, Creekside Science submitted their final draft of the 30-year review of the San Bruno Mountain Habitat Conservation Plan (HCP). This HCP, approved in 1982, was the first ever such agreement. Now, there are more than 500 HCP’s nationwide.  Although both the HCP planning and implementation process has changed dramatically in the past 30 years, there are many lessons that remain pertinent.

With the case of San Bruno Mountain, we conclude that the core butterfly species are thriving and well monitored. Core populations are stable, although some peripheral populations are in decline. We recommend more stewardship needs to be directed towards reducing scrub encroachment in grasslands. Rare plants and rare plant habitat also needs more future attention.

The official announcement and the full document is located on the San Bruno County Parks Department site:



Dr. Weiss co-authors a paper on climate change impacts on Californian ecosystems

In Uncategorized on March 5, 2015 at 2:07 pm

Stu Weiss recently co-authored Adapting California’s Ecosystems to a Changing Climate.  The following is the paper’s abstract:

“Significant efforts are underway to translate improved understanding of how climate change is altering ecosystems into practical actions for sustaining
ecosystem functions and benefits. We explore this transition in California, where adaptation and mitigation are advancing relatively rapidly, through
four case studies that span large spatial domains and encompass diverse ecological systems, institutions, ownerships, and policies. The case studies
demonstrate the context specificity of societal efforts to adapt ecosystems to climate change and involve applications of diverse scientific tools (e.g.,
scenario analyses, downscaled climate projections, ecological and connectivity models) tailored to specific planning and management situations
(alternative energy siting, wetland management, rangeland management, open space planning). They illustrate how existing institutional and policy
frameworks provide numerous opportunities to advance adaptation related to ecosystems and suggest that progress is likely to be greatest when
scientific knowledge is integrated into collective planning and when supportive policies and financing enable action.”

CitizenInvestor Funds Restoration of San Mateo Thornmint

In Uncategorized on December 27, 2014 at 6:21 am

After a successful fundraising campaign on CitizenInvestor in spring of 2013, and a one year wait for wetter (better) growing conditions for San Mateo Thornmint (Acanthomintha obovata ssp. duttonii), a partnership of groups including County of San Mateo Parks, Friends of Edgewood and Creekside Science carefully seeded around the existing thornmint population in order to expand the limited distribution of this plant.

SMT Dec14 seeding pics-4

Creekside Science, the U.S. Fish and Wildlife Service, and San Francisco Water, Sewer, and Power partnered with the U.C. Berkeley Botanical Garden to produce a seed increase using leftover seeds from a decades-old experiment. In total, 7,500 seeds were dispersed on site and early observations in late December indicate that some germination is already occurring in the newly seeded areas!

SMT Dec14 seeding pics-15

The planting plots were mapped and then prepared by scraping the top 1-2 inches of material to the side creating bare ground. This post-germination scraping technique decreases annual grass cover (for that year) and increases the amount of bare ground, which increases germination (and likely survivorship and seed production also). This treatment increased thornmint numbers and vigor in our previous in-situ experiments.

SMT Dec14 seeding pics-9

Packets of 250 seeds (prepared by the U.C. Berkeley Botanical Garden) were spread as evenly as possible into 30 square-meter plots, then tamped gently into the soil to enhance soil to seed contact.

SMT Dec14 seeding pics-18

The new plots were placed uphill of and adjacent to the existing population, in areas where mowing and dethatching had created the open habitat that favors thornmint. Two of the plots were placed in a historical location where thornmint has not been observed for many years.

120914 SMT seedlings observed onsite

Thank you everyone for contributing to make this a successful project. Creekside Science will continue to monitor germination and maturation of this unique restoration effort.


For more photos and information from the Friends of Edgewood, please read here.


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