Identify the impacts to: • Foundation Species (e.g., kelp, seagrass); • Basal Prey (e.g., sardines, anchovies, mullet); • Top Predators (e.g., sharks, tuna, sea lions, elephant seals); • Keystone Species (e.g., sea otters, sea stars)
Different habitats may be vulnerable to different impact types. Therefore, it is important to consider the impacts associated with the project and if habitats present in the proposed area may by sensitive to those impacts. Habitats often support specific assemblages of species so impacts to the habitat are also likely to impact species diversity. In addition, habitats serve many roles, including shelter, refuge from predators and/or competitors, and food. It is important to understand how these habitat roles could be altered due to human impact. Habitat identification should also denote habitats that are listed as "environmentally sensitive habitat areas.
The diet of harbor seals (Phoca vitulina richardii) in San Francisco Bay (SFB) in California was examined from July 2007 to July 2008 via scat analysis. Scats were collected from five major haul-out sites; 22 species of fish and one species of crustacean were identified from 422 scats. The reliance of a non-native invasive species, Yellowfin Goby (Acanthogobius flavimanus), increased in importance in the diet. Additionally, another non-native invasive fish species, Chameleon Goby (Tridentiger trigonocephalus), was found for the first time in the diet of harbor seals in SFB.