of North Carolina, The range of Grandidierella bonnieroides is extended 

 northward and that of Ampithoe valida , Argissa hamatipes and Corophium 

 insidiosum is extended southward. Notes on habitats and zoogeography 

 are included, as well as a key to identification. Most species occurring 

 in North Carolina belong to an assemblage ranging from Cape Cod to 

 northeastern Florida. Cape Hatteras does represent a significant 

 faunistic boundary to estuarine amphipod species. (A. A.) 



Keywords: crustaceans, estuaries, habitats. North Carolina 



V-E-12 



Brenner, D., I. Valiela, and CD. VanRaalte. 1976. Grazing by Talorchestia 



longicornis on an algal mat in a New England salt marsh. Journal of 



Experimental Marine Biology and Ecology 22:161-169. 



Grazing experiments using the carbon-14 dating method and an analysis 

 of fecal pellets and gut contents established that the gammaridean 

 amphipod, Talorchestia longicornis Say, ingests blue-green algae on 

 algal mats in a Massachusetts salt marsh. This grazing had a measurable 

 effect on the lower algal mat, where the density of T. longicornis 

 was high. Exclusion of amphipods resulted in increases in chloro- 

 phyll a^ content, carbon incorporation, and nitrogen fixation. This effect 

 was not seen on the upper mat where T. longicornis was less abundant. 

 This assimilation efficiency of ]_. longicornis feeding on a diet 

 consisting mainly of blue-green algae was surprisingly high (67 percent), 

 considering that blue-green algae are usually considered as a poor 

 quality food for herbivores. The population of T. longicornis 

 seems to be annual, with growth of the overwintered juveniles in 

 spring and early summer. (A. A.) 



Keywords: salt marshes, fecal pellets, amphipods, algae. New England 



V-E-13 



Chock, J.S., and A.C. Mathieson. 1976. Ecological studies of the salt 

 marsh ecad scorpioides (Hornemann) Hauck of Ascophyllum nodosum (L.) 

 LeJolis. Journal of Experimental Marine Biology and Ecology 23:171-190. 



The seasonal and spatial distribution of the free-living ecad scorpioides 

 (Hornemann) Hauck of Ascophyllum nodosum (L.) LeJolis are described 

 from the Great Bay Estuary System of New Hampshire-Maine, U.S.A. The 

 growth and distribution of ecad scorpioides show a variety of phenological 

 and distributional relationships between A. nodosum and the marsh grass 

 Spartina alterniflora Loiseleur-Deslongchamps. A biomass maximum 

 of ecad scorpioides was found in the fall during two consecutive years; 

 it may be attributable to an influx of source material (i.e., A. nodosum ) 

 after storms, as well as normal seasonal growth of the ecad. Spartina 



271 



