Flow and salinity characteristics of the upper Suwannee River Estuary, Florida

2000 ◽  
Keyword(s):  
River Estuary ◽  
Suwannee River

Microzooplankton grazing and the control of phytoplankton biomass in the Suwannee River estuary, USA

Hydrobiologia ◽  
2009 ◽  
Vol 632 (1) ◽  
pp. 127-137 ◽  
Author(s):  
Erin L. Quinlan ◽  
Christina H. Jett ◽  
Edward J. Phlips
Keyword(s):  
Phytoplankton Biomass ◽  
River Estuary ◽  
Suwannee River ◽  
Microzooplankton Grazing

Isolation of Vibrio cholerae from the American Eel, Anguilla rostrata

1983 ◽  
Vol 46 (8) ◽  
pp. 731-732
Author(s):  
C. S. HU ◽  
J. A. KOBURGER
Keyword(s):  
Vibrio Cholerae ◽  
River Estuary ◽  
Anguilla Rostrata ◽  
Isolation Rate ◽  
American Eel ◽  
Suwannee River

Nineteen eels (Anguilla rostrata), collected from the Suwannee River estuary in Florida, were examined for Vibrio cholerae. Nonagglutinable V. cholerae were isolated from 11 of the eels for an isolation rate of 58%. Isolates from 6 of the eels were confirmed by the Smith serotyping system and found to be types 17, 68 and 175.

Development of ecosystem indicators for the Suwannee River estuary: Oyster reef habitat quality along a salinity gradient

2006 ◽  
Vol 29 (3) ◽  
pp. 353-360 ◽  
Author(s):  
Derk C. Bergquist ◽  
Jason A. Hale ◽  
Patrick Baker ◽  
Shirley M. Baker
Keyword(s):  
Habitat Quality ◽  
Oyster Reef ◽  
Salinity Gradient ◽  
River Estuary ◽  
Reef Habitat ◽  
Suwannee River ◽  
Ecosystem Indicators

scholarly journals Exploring Impacts of River Discharge on Forage Fish and Predators Using Ecopath With Ecosim

2021 ◽  
Vol 8 ◽  
Author(s):  
Dylan Sinnickson ◽  
David Chagaris ◽  
Micheal Allen
Keyword(s):  
Food Web ◽  
Functional Groups ◽  
River Estuary ◽  
Forage Fish ◽  
Ecopath With Ecosim ◽  
Short Term ◽  
Estuarine Ecosystem ◽  
Suwannee River ◽  
Freshwater Inputs ◽  
The Impact

The ecology of estuaries is shaped significantly by the extent of freshwater discharge which regulates abiotic processes and influences overall biological productivity. The Suwannee River Estuary of Florida’s Big Bend Coastline has historically been a productive and diverse estuarine ecosystem supported by significant freshwater inputs from the Suwannee River. In recent years, significant changes in land use and climatic conditions have resulted in lower discharges from the Suwannee. Our objectives were to explore the impact of freshwater inputs from the Suwannee River on the estuarine forage fish and sportfish communities downstream. We built a trophic-dynamic food web model in Ecopath with Ecosim to simulate different levels of discharge and evaluate how changes in discharge (drought and floods) would influence the trophic structure of the food web. Using the fitted model, we applied a series of different short-term and long-term flow projections under different climatic scenarios to evaluate impacts on fish functional groups and sportfish biomass. Simulations suggested that ecological production was more influenced by drought conditions than flood conditions. In our short-term scenarios, the drought simulations produced biomass changes that were approximately twice as substantial as the flood scenarios. When making comparisons to other published EwE models, we generally observed smaller changes in biomass production. Although this model focused on the influence of bottom-up effects, we observed strong top-down control of snook (Centropomus undecimalis) on the system. Several functional groups were particularly sensitive to changes in snook abundance which included spotted seatrout (Cynoscion nebulosus), sand seatrout (C. arenarius), and other members of the family Sciaenidae. Because snook have recently colonized the estuary, likely as a result of warmer winter temperatures, this finding has implications for climate change and natural resource management.

Evaluation of Inositol Brilliant Green Bile Salts and Plesiomonas Agars for Recovery of Plesiomonas shigelloides from Aquatic Samples in a Seasonal Survey of the Suwannee River Estuary

1986 ◽  
Vol 49 (4) ◽  
pp. 274-277 ◽  
Author(s):  
MARY L. MILLER ◽  
JOHN A. KOBURGER
Keyword(s):  
Pure Culture ◽  
Environmental Samples ◽  
Bile Salts ◽  
Brilliant Green ◽  
River Estuary ◽  
Culture Studies ◽  
Plesiomonas Shigelloides ◽  
Suwannee River ◽  
High Incidence

Two plating media, inositol brilliant green bile salts (IBB) and plesiomonas (PL) agars, were compared using surface plating procedures for the recovery of Plesiomonas shigelloides. IBB was more effective in both the percentage of positive samples recovered and the percentage of isolates confirmed as P. shigelloides. Pure culture studies of heat- and cold-injured cells, however, showed that IBB agar failed to recover many of these organisms. Samples examined were from the Suwannee River estuary and included water, sediment, fish, crabs and mollusks. This survey found a high incidence (58.7%) of Plesiomonas in environmental samples. Counts of P. shigelloides per gram of sample differed among the various types of samples, ranging from 101 CFU/g in water and oysters to 106 CFU/g in bream.

Land acquisition criteria for the Suwannee river estuary, Florida

1986 ◽  
Vol 14 (3) ◽  
pp. 217-239
Author(s):  
Christopher J. Leadon ◽  
Orjan F. Wetterqvist
Keyword(s):  
River Estuary ◽  
Land Acquisition ◽  
Suwannee River

Anadromous Sturgeons: Habitats, Threats, and Management

2007 ◽  
Keyword(s):  
River Estuary ◽  
Upstream Migration ◽  
Movement Rates ◽  
Gulf Sturgeon ◽  
Suwannee River ◽  
Influence Of Temperature On ◽  
Acipenser Oxyrinchus Desotoi ◽  
Males And Females ◽  
Acipenser Oxyrinchus ◽  
Ultrasonic Transmitters

<em>Abstract.—</em>Eighteen Gulf of Mexico sturgeon <em>Acipenser oxyrinchus desotoi</em> netted at the mouth of the Suwannee River, Florida, in February–April 2001, were tagged with ultrasonic transmitters to examine riverine and estuarine movements. In addition, 30 fish (11 carrying ultrasonic transmitters) were fitted with archival temperature-logging tags to record temperatures encountered by Gulf sturgeon over the course of a year, including both their riverine and estuarine residency. Movement rates of Gulf sturgeon in the Suwannee River were greatest during the upstream migration in March and April 2001 (4.8 km/d) and upon their emigration from the river in September 2001 (6.4 and 16.0 km/d for males and females, respectively). Mean maximum distance that fish were relocated upstream was significantly greater for male Gulf sturgeon (165 km) than for females (126 km). This may relate to female Gulf sturgeon not spawning annually and thus not migrating to putative spawning grounds upriver. In contrast, rates of upstream movement did not differ significantly between sexes. Movements in the nearshore regions of the Suwannee River estuary did not differ between males and females (0.8 and 2.2 km/d, respectively), and was much lower than in the river. Three Gulf sturgeon bearing archival temperature tags were recovered in subsequent netting activities in 2002. Data downloaded from the tags demonstrated that on average Gulf sturgeon were exposed to a 13°C annual flux in temperature, ranging from 26°C in the river during the summer to 13°C in the estuary in the winter, although individual fish experienced as much as a 20°C range (8.1–28.5°C) over the course of a year. Given the influence of temperature on the metabolism of ectotherms such as sturgeon, this broad fluctuation in temperature may have profound implications for the bioenergetics, and hence growth and reproduction, of Gulf sturgeon.

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