regularly associated with this marine phanerogamic plant. The fungi can be 

 separated into three groups, based on relative abundance and frequency of 

 isolation. The dominant group includes species of LahyvLnthuta, the 

 ascomycete Lindva thdlassiae, and the deuteromycetes Hormodendron, Cephalos- 

 poviim, and Bendryphietla avenavia' Variabilities of infestation and differ- 

 ences observed between the foliicolous and lignicolous mycota of ejstuarine 

 environments are discussed. 



80. MONTGOMERY, J.R. , et al. , "Release of Cadmium, Copper, Nickel and Zinc by 

 Sewage Sludge and the Subsequent Uptake by Members of a Turtle Grass 

 (Thalassia testudinum) Ecosystem," Report No. CEER-2, Energy Research and 

 Development Administration, Oak Ridge, Tenn. , May 1977. 



The rates of uptake by a turtlegrass (Thalassia testudinum) ecosystem of 

 cadmium, chromium, copper, nickel, lead and zinc, which were leached from 

 sewage sludge by seawater, were determined. The experimental design used 

 aerated-flowing seawater which passes over a bed of sewage sludge before 

 traversing a model ecosystem. 



81. MORRILL, J.B., "The Submerged and Shoreline Vegetation of Three Canal 

 Systems, Siesta Key, Florida — Preliminary Observations and Recommenda- 

 tions," Proceedings of the First Annual Conference on Restoration of 

 Coastal Vegetation in Florida^ Hillsborough Community College Environ- 

 mental Study Center, Tampa, Fla. , May 1974, p. 39. 



Distribution of marine grasses, water circulation, and water quality were 

 studied in three canal systems in 1972. Two canal systems had vegetated 

 shorelines, the other had seawalls. The water quality was different in each 

 of the three canal systems. Distribution of marine grasses was related to 

 recruitment, depth and width of the canals, tidal current velocities, and 

 presence of shoreline vegetation. Recommendations include a canal design for 

 optimal tidal flushing, trimming of shoreline vegetation, removal of aquatic 

 plants and debris that enter the open bays, and aeration of the bottom waters 

 in dead-end canals. 



82. NELSON, W.G. , "Experimental Studies of Selective Predation on Amphipod: 

 Consequences for Amphipod Distribution and Abundance," Journal of Experi- 

 mental Marine Biology and Ecology, Vol. 38, No. 3, May 1979, pp. 225-245. 



The relationship between the amphipods found associated with eelgrass 

 (Zostera marina) and the common predators have been examined by laboratory 

 experiments and field sampling. Laboratory experiments showed that of the 

 most abundant potential predators on eelgrass amphipods, the pinfish (Lagodon 

 rhomboides) and the grass shrimp (Palaemonetes Vulgaris) were among the most 

 effective predators. Selective feeding by these two species, with respect to 

 prey species, size, and sex, was demonstrated. An examination of the field 

 data in the light of the laboratory selection experiments suggests that the 

 presence of pinfish may (a) determine the relative abundances of different 

 types of amphipod species, (b) determine seasonal changes in species diversity 

 by selectively removing certain species, and (c) determine, through an inter- 

 action with habitat complexity, the spatial distribution of amphipod abundance 

 and diversity within eelgrass beds. 



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