California Conservancy


San Francisco Estuary Invasive Spartina Project
Invasive Spartina animation
Hybrid Spartina rapidly colonized mudflats, such as these surrounding Alameda Island.

The Invasive Spartina Project is a coordinated regional effort among local, state and federal organizations dedicated to preserving California's extraordinary coastal biological resources through the elimination of introduced species of Spartina (cordgrass).

Introduced cordgrasses are highly aggressive invaders that significantly alter both the physical structure and biological composition of our tidal marshes, mudflats and creeks.

Featured Press

-The Verge, August 2018


-San Jose Mercury News, April 2016


-Marin Independent Journal, March 2016

-ESRI ArcNews, Winter 2014/2015


-Bay Nature, April-June 2014


-Alameda Magazine, January-February 2014, Volume 13, Number 1






A Project Managed By

Drift Cards
Thank you for reporting found cards!

Treatment Calendar 2021

Captured in Photos: 9 Years of Change at 219 Marsh Points


Recent Publications:


2019-2020 Monitoring and Treatment Report


2014-2015 Installation Report and

2015-2016 Revegetation Plan



2020 Ridgway's Rail Survey Report



2020 Ridgway's Rail Survey Result Maps by Region

East Bay

North Bay

West Bay

South Bay








Preserving Native Wetlands



©2006 ISP

Design by helloari.   Alameda photo by Stephen Joseph.




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