. The ecology of delta marshes of coastal Louisiana : a community profile. Marsh ecology -- Louisiana; Wetlands -- Louisiana. '^ 1 1 1 1 1 1 0/ 3 30 VYS 60 90 120 150 180 210 240 270 300 330 Figure 50. Net epiphytic production on stems of Spartina al terni f1ora collected at the water'c edge and inland m with the averages, extremes, and fitted curve for the water's edge production superimposed (Stowe 1972). in protein than the dominant grasses. Furthermore the diatoms are already "bite-sized" and may be much more readily available to the consuming members of the community. Theref
. The ecology of delta marshes of coastal Louisiana : a community profile. Marsh ecology -- Louisiana; Wetlands -- Louisiana. '^ 1 1 1 1 1 1 0/ 3 30 VYS 60 90 120 150 180 210 240 270 300 330 Figure 50. Net epiphytic production on stems of Spartina al terni f1ora collected at the water'c edge and inland m with the averages, extremes, and fitted curve for the water's edge production superimposed (Stowe 1972). in protein than the dominant grasses. Furthermore the diatoms are already "bite-sized" and may be much more readily available to the consuming members of the community. Therefore they may be more important metabol ically than has been commonly realized. Benthic Microflora in Marsh Ponds There have been no studies on the gulf coast of the benthic flora found in marsh ponds. Most individuals who have taken the trouble to examine these ponds when they are exposed at low tide can testify that there is almost always a golden sheen to the mud surface. Under the microscope this sheen is resolved into a dense layer of diatoms of many species. Recently Moncreiff (1983) studied the algal mats found on the edges of the V CO « S~ 3 o^ I-'" <e o " 1 o z — 0-10 cm - 10-20 cm •- 20-30 cm. Figure 51. Number of shore-line epiphytic diatoms/cm culm surface area of Spartina alterniflora. Results are pooled averages and for four stations (Stowe 1982). height classes freshwater marshes in the Atchafalaya Delta, and Shaffer (LSU Department of Marine Sciences; pers. comm.) measured metabolic rates of algae on mud flats adjoining salt marshes in Both measured high rates of respiration. Moncreiff production rates of about Barataria Bay. production and reported 400 g C/m net /yr as with individual measurements as high 300 mg C/mVhr. Submerged Grasses in Marsh Ponds There have been no measurements of productivity of submerged plants in marsh ponds. Chabreck (1971a) identified the species found there (Table 19), and it is known that growth is enhanced by stab
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