scholarly journals The controversial role of foreign fisheries consultants in Sierra Leone's coastal waters

Marine Policy ◽  
2020 ◽  
Vol 118 ◽  
pp. 103399
Author(s):  
Nwamaka Okeke-Ogbuafor ◽  
Tim Gray ◽  
Selina Marguerite Stead
Keyword(s):  
Coastal Waters

Urban Wastewater Discharge and Bacteriological Quality of Receiving Coastal Waters: Processes and Modelling

1993 ◽  
Vol 27 (12) ◽  
pp. 223-226
Author(s):  
J.-F. Guillaud ◽  
M. Pommepuy ◽  
E. Dupray ◽  
J.-C. Salomon ◽  
B. Thouvenin
Keyword(s):  
Coastal Zone ◽  
Coastal Waters ◽  
Wastewater Treatment Plants ◽  
Enteric Bacteria ◽  
Wastewater Discharge ◽  
Urban Wastewater ◽  
Bacteria Transport

The aim of this paper is to present some results of bacterial studies which were developed by IFREMER in coastal discharge areas of urban wastewaters; they are focused on the determination of bacterial inputs by wastewater treatment plants, the role of environmental factors on the enteric bacteria survival in the coastal zone, and the modelling of bacteria transport and disappearance in order to provide useful management information for minimizing faecal pollution in the coastal zone.

Role of Visible Spectroscopy in Bio-Optical Characterization of Coastal Waters

2020 ◽  
pp. 1-5
Author(s):  
Anurag Gupta ◽  
Syed Moosa Ali ◽  
Aswathy Vijaya Krishna ◽  
Arvind Sahay ◽  
Mini Raman
Keyword(s):  
Coastal Waters ◽  
Optical Characterization ◽  
Visible Spectroscopy

scholarly journals The role of air-sea exchange in the marine nitrogen cycle

2006 ◽  
Vol 3 (3) ◽  
pp. 271-280 ◽  
Author(s):  
T. Jickells
Keyword(s):  
Nitrogen Cycle ◽  
Coastal Waters ◽  
Algal Blooms ◽  
Long Range Transport ◽  
Atmospheric Nitrogen ◽  
Ocean Productivity ◽  
Nitrogen Inputs ◽  
Range Transport ◽  
Atmospheric Inputs

Abstract. This contribution to the Spot-On volume considers the magnitude and composition of atmospheric nitrogen inputs to the oceans and then goes on to consider the impacts of these inputs. Effects in open ocean and coastal areas are probably different. Offshore atmospheric inputs may produce a small enhancement of overall ocean productivity and hence CO2 drawdown. In coastal waters atmospheric inputs contribute significantly to overall eutrophication pressure, but evidence that they trigger algal blooms is limited. Management of atmospheric inputs to coastal waters to mitigate eutrophication pressures requires that emissions be managed over a wide area reflecting the efficient long range transport of atmospheric nitrogen. Strategies for management of oxidised and reduced nitrogen deposition will be different reflecting their different rates of deposition.

Marine Pelagic Ciliates and Their Productivity During Summer in Plymouth Coastal Waters

1992 ◽  
Vol 72 (1) ◽  
pp. 265-268 ◽  
Author(s):  
E. D. Pilling ◽  
R. J. G. Leakey ◽  
P. H. Burkill
Keyword(s):  
Surface Waters ◽  
Coastal Waters ◽  
Food Resource ◽  
Water Bottle ◽  
Ecological Role ◽  
Ciliate Community ◽  
June July ◽  
Present Pilot Study ◽  
Trophic Role

The ciliate list for Plymouth waters has been extended by 14 species using modern taxonomic techniques. Ciliates were abundant in the plankton where they formed a significant food resource. Their community biomass and production was estimated to average 12 µ C 1 and 9 µ C 1 respectively during the summer. The ciliate community was dominated by a diverse assemblage of aloricate choreotrichs, suggesting a complex trophic role for this protozoan group.Ciliate protozoans are ubiquitous and often abundant in marine waters where they are frequently considered to play an important ecological role in trophic flux and nutrient cycling within the plankton (Fenchel, 1987). In spite of this, however, their ecological role in British coastal waters is poorly understood. In Plymouth waters, for instance, there has been only one previous study of marine pelagic Protozoa (Lackey & Lackey, 1963), despite the presence of a marine laboratory in the region for over 100 years. As the study by Lackey & Lackey (1963) focused solely upon the taxonomy of local protists, the ecological role of protozoans in Plymouth waters is unknown. To redress this anomaly the present pilot study was undertaken in Plymouth waters with the following objectives: to identify the dominant ciliates from this region using techniques unavailable to Lackey & Lackey (1963), to quantify ciliate abundance and cell sizes, and to estimate their biomass and production.Triplicate water samples were collected, using a 3-litre water bottle, from surface waters at each of four stations along a 20-km transect between Plymouth Sound (50°21'N 04°09'W) and the Eddystone Rock (50°ll'N 04°16'W) during June, July and August 1988.

scholarly journals The role of air-sea exchange in the marine nitrogen cycle

2006 ◽  
Vol 3 (1) ◽  
pp. 183-210 ◽  
Author(s):  
T. Jickells
Keyword(s):  
Nitrogen Cycle ◽  
Coastal Waters ◽  
Algal Blooms ◽  
Long Range Transport ◽  
Atmospheric Nitrogen ◽  
Ocean Productivity ◽  
Nitrogen Inputs ◽  
Range Transport ◽  
Atmospheric Inputs

Abstract. This contribution to the Spot-On volume considers the magnitude and composition of atmospheric nitrogen inputs to the oceans and then goes on to consider the impacts of these inputs. Effects in open ocean and coastal areas are probably different. Offshore atmospheric inputs may produce a small enhancement of overall ocean productivity and hence CO2 drawdown. In coastal waters atmospheric inputs contribute significantly to overall eutrophication pressure, but evidence that they trigger algal blooms is limited. Management of atmospheric inputs to coastal waters to mitigate eutrophication pressures requires that emissions be managed over a wide area reflecting the efficient long range transport of atmospheric nitrogen. Strategies for management of oxidised and reduced nitrogen deposition will be different reflecting their different rates of deposition.

scholarly journals Physical and Chemical Characteristics of a Mediterranean Coastal Microenvironment: The "Salty Lake" of Aghios Nikolaos (Crete, Greece)

2013 ◽  
Vol 2 (2) ◽  
pp. 167-178
Keyword(s):  
Coastal Waters ◽  
Marine Ecosystem ◽  
Anthropogenic Pollutants ◽  
High Concentrations ◽  
Lake Waters ◽  
Physical And Chemical ◽  
The Impact ◽  
Very High ◽  
Production Of Ammonia

The present paper examines a small and deep (53 m) salty lake, as well as the adjacent harbor of Aghios Nikolaos (Crete). The survey was carried out in 1996. Physicochemical parameters indicated that the main characteristics of the system are the inflow of karstic water from underwater springs inside the lake and the permanent anoxic conditions prevailing in its deeper part, below the thermocline. Nutrient concentrations are very high throughout the water column of the lake. Ammonia is the main source of nitrogen in the summer, particularly below the thermocline, whereas nitrates have high concentrations during spring and autumn. The high levels of these nutrients in the adjacent to the lake harbor and coastal waters indicate clearly the impact of the lake to the marine ecosystem. Anthropogenic pollutants, such as aromatic hydrocarbons, show high concentrations above thermocline, at 5-10 m depths during all samplings. However no particular point source was identified. The presence of hydrocarbons contributes to ineffective oxygenation of the lake waters and facilitates the development of anoxia and the production of ammonia. The PAH concentrations at the sampling stations outside the lake are typical of marine environments, with relatively small oil-derived inputs, indicating the complex role of the system as a source and/or as a trap of PAHs.

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