For those samples intended for

Given that most of the wetlands surrounding San Francisco Bay have been lost to agriculture or urban development, the wetlands of Suisun Marsh are considered critical spawning and rearing habitat for a diverse assemblage of native and introduced fish CNX1351 (Meng et al., 1994, Meng and Matern, 2001 and O\'Rear and Moyle, 2014). Of particular significance is the use of the marsh by several native species whose numbers have dramatically declined throughout the estuary in recent decades (Sommer et al., 2007), such as Sacramento splittail (Pogonichthys macrolepidotus), longfin smelt (Spirinchus thaleichthys), and delta smelt (Hypomesus transpacificus).