. The ecology of Tijuana Estuary, California : a national estuarine research reserve. Estuarine ecology -- California Tijuana River Estuary. is absent. Recent population dynamics are presented in Section Jorgensen (1975) suggested several advantages of cordgrass-dominated marshes for the rails. The tall grass provides cover for protection against predators and the birds weave a canopy of live stems over their nests (Figure ). Both the egg and brood nests are woven of dead cordgrass stems. The nests that are anchored to vertical cordgrass stems can float, thereby preventing submergen
. The ecology of Tijuana Estuary, California : a national estuarine research reserve. Estuarine ecology -- California Tijuana River Estuary. is absent. Recent population dynamics are presented in Section Jorgensen (1975) suggested several advantages of cordgrass-dominated marshes for the rails. The tall grass provides cover for protection against predators and the birds weave a canopy of live stems over their nests (Figure ). Both the egg and brood nests are woven of dead cordgrass stems. The nests that are anchored to vertical cordgrass stems can float, thereby preventing submergence; the nests in cordgrass can be more firmly anchored than elsewhere; the lower marsh areas are wetter and less accessible to terrestrial predators, and the black-colored chicks are camouflaged against the black substrate of the lower marsh. Finally, their most common foods occur in or near areas where cordgrass is abundant. Yellow shore crabs and lined shore crabs were the dominant items in regurgitated pellets analyzed by Jorgensen (1975). Further evidence of the species' relationship with tidal cordgrass marshes developed in 1984 when cordgrass died and the Tijuana Estuary population of rails dropped to zero (Chapter 5).. Figure The light-footed clapper rail finds cover, food, and nesting material in the cordgrass marsh. Its nest is a masterpiece of construction, with a floating platform and protective arch, commonly made of cordgrass. Mclntire collection, © 1986 by Zedler. 38. 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, D. C. : NOAA Office of Coastal Resource Management, Sanctuaries and Reserves Division]
Size: 1673px × 1493px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, bookleafnumber48
