35. CORLESS, J., and TRENT, L. , "Comparison of Phytoplankton Production Between 

 Natural and Altered Areas in West Bay, Texas," Fishevy Bulletin, Vol. 69, 

 No. 4, 1971, pp. 829-832. 



Phytoplankton production was compared among an undr edged marsh area, a 

 bay area, and an adjacent marsh area altered by channelization, bulkheading, 

 and filling. The average gross production (milligrams of carbon per liter per 

 day) in the altered area (canals) was 8 percent higher than in the marsh area 

 and 48 percent higher than in the bay area during June, July, and August 1969. 

 Gross and net productions were significantly higher in the canals and marsh 

 than in the bay; differences between the canals and marsh were not significant. 



36. CRONIN, L.E., GUNTER, G., and HOPKINS, S.H,, "Effects of Engineering 

 Activities on Coastal Ecology," Interim Report to the Office of the 

 Chief of Engineers, U.S. Army, Corps of Engineers, Washington, D.C., 

 1969. 



An interim report is presented of a tentative listing of pertinent Corps- 

 related activities, with a preliminary analysis and evaluation of the ecologi- 

 cal effects. The activities included dredging, filling, dams, diversions, 

 jetties and groins, beach nourishment, land-cut canals, weed control, hurricane 

 barriers, finger-type developments, and ocean disposal. Also, studies that 

 would significantly improve comprehension, and therefore, the prediction of 

 the effects of coastal engineering changes are listed with supplementary 

 comments. 



37. CRONIN, L.E., GUNTER, G., and HOPKINS , S.H., "Effects of Engineering 

 Activities on Coastal Ecology," Report to the Office of the Chief of 

 Engineers, U.S. Army, Corps of Engineers, Washington, D.C., 1971. 



A team of consultants made a broad analysis of the effects that 13 types 

 of engineering activities have on the ecology of coastal areas. Studies which 

 would significantly improve the understanding of these effects also were identi- 

 fied. The following types of engineering activities were considered: dredging, 

 filling, dams, levees and spillways, diversions, jetties and groins, beach 

 nourishment, land-cut canals, weed control, hurricane barriers, finger-type 

 developments, ocean disposal, and wetlands modification. 



38. DAIBER, F.C., "Ecological Effects Upon Estuaries Resulting from Lagoon 

 Construction, Dredging, Filling, and Bulkheading," Division of Fish and 

 Wildlife, Department of Natural Resources and Environmental Control, State 

 of Delaware, Dover, Del., 1975. 



Benthic communities of tidal creeks, areas of the open bay, and dredged 

 lagoons in Rehoboth Bay, Indian River Bay, and Little Assawaman Inlet, Delaware, 

 were studied in an attempt to evaluate the biotic and environmental conditions 

 and quality of the dredged areas. Several environmental parameters, including 

 salinity, temperature, and dissolved oxygen of the bottom water, were measured 

 to relate the benthic community structure to the physical and chemical condi- 

 tions of the environment. Lagoon stations, as a group, were found to have lower 

 numbers of individuals and species and lower species evenness and diversity than 

 marsh or bay stations. These differences were only significant during the 

 summer and fall. 



39. DeCOURSEY, J., and VERNBERG, W.B., "The Effect of Dredging in a Polluted 

 Estuary on the Physiology of Larvae Zooplankton," Water Research, Vol. 9, 

 No. 2, Feb. 1975, pp. 149-154. 



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