1. Brine Shrimp (Artemia franciscana): These tiny crustaceans are a key food source for many birds, including the California Gull. They thrive in the high salinity of Mono Lake and are an integral part of the food web.

2. Algae (primarily Dunaliella): These microscopic organisms form the base of the food web in Mono Lake. They are able to tolerate the high salinity and alkalinity of the water and photosynthesize, producing energy that supports the entire ecosystem. The algae are particularly important for the brine shrimp, which feed on them.