There are four non-native species of invasive Spartina (cordgrass)
that have spread throughout tidal wetlands within the San Francisco
Bay. These invasive varieties grow more densely than native Spartina and
can alter our estuary both physically and biologically, threatening
the ecological balance and diversity of its fragile habitats.
It spreads rapidly, both by underground runners and by seed
that can float on water to new locations. The result is a loss
of endangered species habitat, increased flooding from clogged
flood control channels, and the creation of mosquito-breeding
The Invasive Spartina Project, a project of the
California Coastal Conservancy, is dedicated to controlling
the spread of, and eventually eradicating the non-native cordgrass
from the San Francisco Bay.
To do so, the ISP coordinates with many Bay Area partners — landowners
and property managers, local government, environmental and
regulatory agencies, biological consultants, and concerned
residents — to monitor and treat invasive Spartina infestations.
We truly appreciate your help in making our efforts to protect
our San Francisco Bay Estuary more effective.