Current habitat area is comparatively much less in the San Pablo Bay marshland. Very few local extant tidal marshes have true undisturbed marsh vegetation, and even fewer border significant upland areas where marshland species can seek refuge from flooding.
Current living space is significantly smaller in the San Pablo Bay wetland. Very few nearby existing tidal marshes have intact, undisturbed marsh vegetation, and even fewer border significant high-ground areas where marshland species can find shelter from flooding.