scholarly journals Contrasting seasonal patterns in dimethylsulfide, dimethylsulfoniopropionate, and chlorophyll a in a shallow North Carolina estuary and the Sargasso Sea

2008 ◽  
Vol 53 ◽  
pp. 281-294 ◽  
Author(s):  
WG Sunda ◽  
DR Hardison
Keyword(s):  
North Carolina ◽  
Chlorophyll A ◽  
Seasonal Patterns ◽  
Sargasso Sea ◽  
North Carolina Estuary

Examining the Relationship Between Wet Weather and Fecal Contamination in a North Carolina Estuary

2007 ◽  
Vol 2007 (5) ◽  
pp. 1019-1031
Author(s):  
Angela D. Coulliette ◽  
Andrew D. Gronewold ◽  
Eric S. Money ◽  
Marc L. Serre ◽  
Rachel T. Noble
Keyword(s):  
North Carolina ◽  
Fecal Contamination ◽  
Wet Weather ◽  
North Carolina Estuary ◽  
The Relationship

Nitrogenase activity associated with Zostera marina from a North Carolina estuary

1982 ◽  
Vol 28 (4) ◽  
pp. 448-451 ◽  
Author(s):  
Garriet W. Smith ◽  
Steven S. Hayasaka
Keyword(s):  
North Carolina ◽  
Zostera Marina ◽  
Nitrogenase Activity ◽  
Growth Period ◽  
Winter Period ◽  
Late Winter ◽  
Active Growth ◽  
North Carolina Estuary ◽  
Active Growth Period

Nitrogenase activity (at in situ temperatures) associated with Zostera marina reflected the active growth periods of this plant in North Carolina coastal waters. During the plants most active growth period (late winter – spring) nitrogenase activity was primarily rhizospheric (8.47 μmol nitrogen fixed∙m−2∙day−1), while during its fall – early winter period it was primarily phyllospheric (8.03 μmol nitrogen fixed∙m−2∙day−1). No nitrogenase activity was detected during the warmer summer months when the plant is dormant. Phyllospheric nitrogenase activity (possibly the result of epiphytic heterocystic blue-green bacteria) was highest when plants were incubated aerobically in the presence of light.

scholarly journals Observations on spiny dogfish (Squalus acanthias) captured in late spring in a North Carolina estuary

F1000Research ◽  
2014 ◽  
Vol 3 ◽  
pp. 189
Author(s):  
Charles Bangley ◽  
Roger Rulifson
Keyword(s):  
North Carolina ◽  
Dissolved Oxygen ◽  
Squalus Acanthias ◽  
Late Spring ◽  
Spiny Dogfish ◽  
Northwest Atlantic ◽  
Atlantic Population ◽  
Total Length ◽  
North Carolina Estuary

Five spiny dogfish were captured in early-mid May during gillnet and longline sampling targeting juvenile coastal sharks in inshore North Carolina waters.  Dogfish captures were made within Back Sound and Core Sound, North Carolina. All dogfish were females measuring 849-905 mm total length, well over the size at 50% maturity. Dogfish were caught at stations 1.8-2.7 m in depth, with temperatures 22.9-24.2 °C, 32.8-33.4 ppt salinity, and 6.9-8.0 mg/L dissolved oxygen. These observations are among the latest in the spring for spiny dogfish in the southeastern U.S. and occurred at higher temperatures than previously recorded for this species.  It is unclear whether late-occurring spiny dogfish in this area represent a cryptic late-migrating or resident segment of the Northwest Atlantic population.

scholarly journals Eutrophication mitigation in rivers: 30 years of trends in spatial and seasonal patterns of biogeochemistry of the Loire River (1980–2012)

2015 ◽  
Vol 12 (8) ◽  
pp. 2549-2563 ◽  
Author(s):  
C. Minaudo ◽  
M. Meybeck ◽  
F. Moatar ◽  
N. Gassama ◽  
F. Curie
Keyword(s):  
Dissolved Oxygen ◽  
Chlorophyll A ◽  
Seasonal Variations ◽  
River System ◽  
Longitudinal Distribution ◽  
Seasonal Patterns ◽  
Nutrient Load ◽  
Main River ◽  
Loire River ◽  
Monthly Survey

Abstract. Trends and seasonality analysis from 1980 onward and longitudinal distribution, from headwaters to estuary, of chlorophyll a, nitrate and phosphate were investigated in the eutrophic Loire River. The continuous decline of phosphate concentrations which has been recorded since 1991 both in the main river and in the tributaries has led to the conclusion that it was responsible for the significant reduction in phytoplanktonic biomass across the whole river system, although Corbicula spp. clams invaded the river during the same period and probably played a significant role in the phytoplankton decline. While eutrophication remained lower in the main tributaries than in the Loire itself, they were found to contribute up to ≈ 35% to the total nutrient load of the main river. The seasonality analysis revealed significant seasonal variations for the different eutrophication metrics and calls into question the classical monthly survey recommended by national or international authorities. Reducing P inputs impacted these seasonal variations: the decline of seasonal amplitudes of chlorophyll a reduced the seasonal amplitude of orthophosphate and of daily variations of dissolved oxygen and pH but did not significantly affect the seasonal amplitude of nitrate. Thus, the influence of phytoplankton on seasonal variations of nitrate was minor throughout the period of study.

Immigration of Larvae of Fall/Winter Spawning Marine Fishes into a North Carolina Estuary

Estuaries ◽  
1990 ◽  
Vol 13 (4) ◽  
pp. 453 ◽  
Author(s):  
Stanley M. Warlen ◽  
John S. Burke
Keyword(s):  
North Carolina ◽  
Marine Fishes ◽  
North Carolina Estuary

scholarly journals Space/Time Analysis of Fecal Pollution and Rainfall in an Eastern North Carolina Estuary

2009 ◽  
Vol 43 (10) ◽  
pp. 3728-3735 ◽  
Author(s):  
Angela D. Coulliette ◽  
Eric S. Money ◽  
Marc L. Serre ◽  
Rachel T. Noble
Keyword(s):  
North Carolina ◽  
Space Time ◽  
Fecal Pollution ◽  
Time Analysis ◽  
North Carolina Estuary ◽  
Eastern North Carolina
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