the Apalachicola estuary throughout the oredominant in the spring, while 



year (Table 7) (Estabrook 1P73). In East Skeletonema costatum , Rhizosolenia alata 



Bay, Melosira granulata is the dominant and Coscinodiscus radiatus prevail during 



species; Chaetoceros lorenzianus is fall and winter months. Although the 



dominant in Apalachicola Bay. Species phytoplankton standinq crop is quite low 



such as Chaetoceros lorenzianus , at any given time, phytoplankton 



Bacteriastrum delicatulum , and productivity is often quite high in areas 



Thalassiothrix frauenfeldii are such as the Apalachicola Bay system. 



Table 6. Net above-ground primary production of marsh plants in various salt marshes 

 (Kruczynski et al. 1978b). 



Marsh plant and Net primary productivity g/m^/yr 



location LM UM HM Authors 



Spartina alternif lora 



Kruczynski et al. 1978a 



Good 1965 



Morgan 1961 



Udell et al. 1969 



Smalley 1959 



Shea et al . 1975 



Teal 1962 



Johnson 1970 



Stroud & Cooper 1%8 



Marshall 1970 



Day et al. 1973 



Schelske & Odum 1961 



Kirby 1971 



Keefe & Boynton 1973 



Morgan 1961 



Williams & Murdoch 1972 



Wass & Wright 1969 



Odum & Fanning 1973 



Odum 1971 



Fit 949 595 243 Kruczynski et al. 1978a 



MS — — 390 Gabriel & de la Cruz 197' 



NC — — 560 Foster 1968 



NC — — 754 Williams & Murdoch 1972 



NC — — 796 Stroud & Cooper 1968 



NC — — 849 Heald 1969 



NC — - — 895 Waits 1967 



NC — - — 870-1900 Kuenzler & Marshall 1973 



MS — — 2106 Willingham et al. 1975 



LM = low marsh. 



UM = upper marsh. 



HM = high marsh. 



+ = estimate by change in biomass method. 



32 



