Coastal (West) Marin is located in the California Floristic Province, a biodiversity hotspot with Mediterranean-type climate that supports a robust variety of flora and fauna. Biodiversity, a combination of bio (life) and diversity, generally refers to the variety and variability of life on Earth. No feature of Earth is more complex, dynamic, and varied than the layer of living organisms that occupy its surfaces and its seas, and no feature is experiencing more dramatic change at the hands of humans. This layer of living organisms—the biosphere—through the collective metabolic activities of its innumerable plants, animals, and microbes physically and chemically unites the atmosphere, geosphere, and hydrosphere into one environmental system within which millions of species, including humans, need to thrive.

West Marin's biodiversity may be mostly characterized by the natural resources of Point Reyes National Seashore and the Golden Gate National Seashore, as it covers over half the region. Point Reyes National Seashore is as varied as the landscape itself, and ranges from large marine mammals such as the blue whale to the relatively small, endangered Myrtle's silverspot butterfly. In addition, the area is home to a broad spectrum of aquatic and terrestrial environments which support a diversity of plant communities such as forests, grasslands, coastal scrub, intertidal zones and marshes, coastal dunes and wetlands.

Since 1971, EAC has been actively advocating for the protection of biodiversity from Dillon to Muir beaches. Our work is focused on bringing people, science and policy together, to solve some of these threats and champion innovative solutions where public, state, federal and private lands converge. For almost fifty years we’ve worked on various projects to protect vital ecosystems, defend critical legislation, enforce accountability of leaders and legislators and rally our community to become stewards of their backyard. 

habitat & species

pesticides

Pollution

Breathable air, potable water, fertile soils, productive lands, bountiful seas, climate and other ecosystem services are manifestations of the workings of life. It follows that large-scale human influences over this biota have tremendous impacts on human well-being. It also follows that the nature of these impacts, good or bad, is within the power of humans to influence.

BIODIVERSITY IN WEST MARIN:

• 490+ North American bird species

• 80+ species of land and marine mammals

• 85+ species of fresh and saltwater fish

• 29+ species of reptiles and amphibians

• Thousands of aquatic and terrestrial invertebrate species including sea anemones, starfish, butterflies, insects and more

Advisory Committee

Our Advisory Committee (board, staff, and other stakeholders) provides expertise and advice on the complicated issues facing our lands, waters, and biodiversity in coastal Marin. Their feedback and recommendations help broaden our view and scope when making decisions involving our flora and fauna, habitat and species protection, pesticide use, and pollution.

Learn more about West Marin's unique and irreplaceable landscapes and our colleagues:

Marin Audubon Society
Marin County
Marin County Parks, Agate Beach
Marin County Parks, Bolinas Lagoon
Marin Municipal Water District
National Park Service - Point Reyes National Seashore
Point Blue Conservation Science
Sierra Club California & Marin Group

Photographs by Carlos Porrata