standing crop ranged from 0.002 to 0.46 ml/m (displacement volume). 

 Averages for the stations ranged from 0.089 to 0.149 ml/m-^ and were not 

 significantly different from one another. Averages for the surveys 

 ranged from 0.033 ml/m-^ in July-August to 0.285 in January. The 

 standing crop was significantly greater in the winter than in the late 

 summer. The annual average, 0.114 ml/m^, multiplied by the average 2 

 depth of the estuaries, 1.18 m, yielded a standing crop of 0.13 ml/m . 



A comparison of this data with other studies suggested that a small 

 standing crop of zooplankton was typical of shallow embayments. For 

 areas other than the open sea, standing crop was approximated by the 

 equation: 



Zooplankton vol. (ml/m ) = 0.259 x avg length water column (m) 



Factors responsible for the scarcity of zooplankton in the Beaufort 

 area were not identified, but temperature, food supply, and tidal 

 flushing were eliminated as potential factors. Daily food consumption 

 by zooplankton was estimated to be only 2 to 9 percent of the phytoplankton 

 net photosynthesis. In shallow areas the importance of zooplankton as 

 a part of the herbivore link in the food chain appeared inversely 

 related to the average length of the water column. (A. A. and B.W.) 



Keywords: zooplankton, estuarine systems, food chain, energy flow, biomass. 

 North Carolina 



V-E-9 



Phleger, F.B. 1965. Patterns of marsh foraminifera, Galveston Bay, Texas, 

 Limnology and Oceanography 10(Suppl .) :R169-R184. 



Populations of living foraminifera were studied from six areas of 

 marine marsh in Galveston Bay. The general marsh foraminiferal 

 assemblage is an Ammotium sal sum-Mi liammina frisca one, with 

 common Ammonia beccarii , Arenoparrella mexicana . and Trochammina 

 inflata , and also containing Ammoastuta inepta , Elphidium spp., 

 Tiphotrocha comprimata and Trochammina macrescens in somewhat smaller 

 frequencies. 



The following marsh environments have distinctive assemblages 

 of foraminifera: (1) channel or bay bordering a marsh, (2) fringing 

 Spartina zone, (3) Salicornia berm, (4) inner Spartina zone, 

 (5) inner Salicornia zone, (6) lagoon barrier marsh, (7) "more saline" 

 marsh, and (8) "less saline" marsh. Living populations are very 

 small to very large, living-total population rates are large, and 

 deposition rates are high. 



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