descriptions of modern living fauna and their relationship with 

 contemporary death assemblages may be available for interpretation 

 of the assemblages found in the fossil record. (Author's conclusions) 



Keywords: salt marshes, mollusks, ecosystem, U.S. Pacific coast 



V-E-6 



Kuenzler, E.J. 1961. Structure and energy flow of a mussel population 

 in a Georgia salt marsh. Limnology and Oceanography 6:191-204. 



Modiolus demissus Dillwyn was studied near Sapelo Island, Georgia. 

 The size distribution of the mussels was bimodal with maximum numbers 

 in the dry weight (body) classes 0-24 mg and 400-599 mg. The total 

 weight of mussels smaller than 200 mg was less than two percent of the 

 total population weight. Random samples gave an estimated population 

 density of 7.8/m^ for the entire inhabited marsh; the estimated organic 

 biomass was 11.5 gm/m^, one-third of which was body and two-thirds of 

 which was shell conchiolin. The population was most dense near the heads 

 of small creeks, averaging 32 mussel s/m^. The mussels, however, were 

 not only more abundant in some types of marsh than in others, they were 

 also clumped within areas of uniform marsh. Shell growth occurred 

 throughout the year, especially in small and medium-sized individuals, 

 but it was more rapid during the warm months. 



The height-to-weight ratio changes with the seasons, the mussels 

 being heaviest prior to spawning. Growth and mortality of mussels in 

 flower pots in the marsh indicated a net annual population growth 

 of 445 mg/rcr (dry body weight) and a net annual mortality loss of 

 1200 mg/m^. Allowance for bias would place the steady state growth- 

 mortality rate neccesary to just maintain the population somewhere 

 between these two estimates. Population growth and gamete production 

 accounted for an energy flux of about 13.9 and 2.8 kcal/m^/yr, 

 respectively. Respiration by the population accounted for approximately 

 39 kcal/m^/yr, over two-thirds of which took place in air during ebb tide. 

 Total assimilation amounted to 56 kcal/m^/yr. (A. A.) 



Keywords: mussels, energy flow, salt marsh, population structure, 

 Georgia 



V-E-7 



Cuzon du Rest, R.P. 1963. Distribution of the zooplankton in the 



salt marshes of southeastern Louisiana. Publications of the Institute 



of Marine Science, University of Texas 9:132-155. 



A plankton survey was made at fifteen stations in the saltwater 

 marshes of southeastern Louisiana from July 1959 to March 1961. The 



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