A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Digging, ditch cutting, canal construction and channelization have affected the marine environment in the Louisiana coastal marshlands. In attempts to investigate biological hydrological parameters now associated with these artificial wetland features, samples were made in four environment types: (a) open, unaltered areas, (b) open canals, (c) semi-open canals, and (d) closed canals. Sampling was accomplished by using various gear over a two-year period. During the study, 67,560 individuals composed of 88 different species were collected with a 16-foot trawl. Open, undisturbed areas offered the largest numbers of individuals and closed canals contained the fewest. Catches of planktonic organisms in open and semi-open canals were similar. A decrease in catch and in species diversity was noted in closed canals. Water chemistry reflected a trend of fluctuation dependent upon fresh water and saltwater intrusion. Peak levels of most nutrients were recorded following freshwater flooding conditions or storm surges.
Digging, ditch cutting, canal construction and channelization have affected the marine environment in the Louisiana coastal marshlands. In attempts to investigate biological hydrological parameters now associated with these artificial wetland features, samples were made in four environment types: (a) open, unaltered areas, (b) open canals, (c) semi-open canals, and (d) closed canals. Sampling was accomplished by using various gear over a two-year period. During the study, 67,560 individuals composed of 88 different species were collected with a 16-foot trawl. Open, undisturbed areas offered the largest numbers of individuals and closed canals contained the fewest. Catches of planktonic organisms in open and semi-open canals were similar. A decrease in catch and in species diversity was noted in closed canals. Water chemistry reflected a trend of fluctuation dependent upon fresh water and saltwater intrusion. Peak levels of most nutrients were recorded following freshwater flooding conditions or storm surges.
A Study of the Fauna in Dredged Canals of Coastal Louisiana
1976
79 pages
Report
No indication
English
| British Library Conference Proceedings | 2015