. The ecology of Tijuana Estuary, California : a national estuarine research reserve. Estuarine ecology -- California Tijuana River Estuary. (Spartina foliosa), typifies this community (Figure ). Cordgrass has proven easy to monitor (Zedler 1983b), amenable to transplantation (Zedler 1984a), and responsive to manipulative experimentation (Covin 1984). Still, our knowledge of the total community is incomplete. Insects that live in and on the cordgrass are just beginning to be studied (Figure ; Covin 1986). With new investigations, species that are new to science are discovered (, In
. The ecology of Tijuana Estuary, California : a national estuarine research reserve. Estuarine ecology -- California Tijuana River Estuary. (Spartina foliosa), typifies this community (Figure ). Cordgrass has proven easy to monitor (Zedler 1983b), amenable to transplantation (Zedler 1984a), and responsive to manipulative experimentation (Covin 1984). Still, our knowledge of the total community is incomplete. Insects that live in and on the cordgrass are just beginning to be studied (Figure ; Covin 1986). With new investigations, species that are new to science are discovered (, Incertella sp. and Cricotopus sp., Figure ). Both of these tiny insects have larvae that live within the leaves of cordgrass (J. Covin, SDSU, pers. comm.). Horn snails, lined shore crabs (Pachygrapsus crassipes), and yellow shore crabs (Hemigrapsus oregonensis) are abundant, but their habits are not well known. They feed on the algal mats and detritus and are themselves eaten by the larger marsh birds. No animal characterizes the lower marsh better than the light-footed clapper rail (Figure ; Jorgensen 1975; Zembal and Massey 1981a,b; Massey et al. 1984, Zembal 1990, Zembal 1991). Jorgensen's (1975) study at Tijuana Estuary assessed the birds' occupancy, nesting, and foraging in five habitat types (high marsh, middle marsh, saltwort-annual pickleweed, short cordgrass, and tall cordgrass).. Figure The cordgrass community, showing the fiddler crab (right) and the lined shore crab (in burrow). California horn snails are attached to the cordgrass stems and on the mud. A California least tern is poised, ready to dive for fish in the channel. Mclntire collection, © 1986 by Zedler. 36. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zedler, Joy B; Nordby, Christopher S; Kus, Barbara Elaine. [Washington
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