ASSESSING SURFACE AND GROUNDWATER NUTRIENT INPUTS TO A COASTAL LAKE, LONG LAKE, SOUTH CAROLINA

The majority of adverse changes in watersheds impairing water quality occurred over a period of thirty to more than one hundred years. In many areas over a period of about 80 years more than 90% of the wetlands were drained, cultivated and converted to agricultural and urban uses. This conversion changed the redox status of the soils and soil cover with a concurrent large increase of suspended solids, dissolved organic matter, nitrogen, and phosphate loads from the watersheds located in the affected regions. The question whether these adverse changes are reversible by reduction or discontinuation of excessive inputs of pollutants came to light and has been analyzed recently after the political changes in Eastern Europe. Reliable dynamic long term models that would describe interactions between nutrient inputs, outputs, storage etc., have not been developed yet. It is becoming apparent that it may take longer for the watersheds to recover after nutrient loads to surface and groundwater are reduced if remedial measures are gradually implemented.

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The Role of a Permeable Sand Column in Modifying Tidal Creek Nutrient Inputs into the Coastal Ocean

Water ◽

10.3390/w12113079 ◽

2020 ◽

Vol 12 (11) ◽

pp. 3079

Author(s):

Nicholas A. Legut ◽

Brandon T. Hawkins ◽

Angelos K. Hannides

Keyword(s):

South Carolina ◽

Nutrient Loading ◽

Salinity Gradient ◽

Coastal Ocean ◽

Coastal Sediments ◽

Nutrient Inputs ◽

Tidal Creeks ◽

Overlying Water ◽

Sand Column

Estuarine tidal creeks are an important conduit for freshwater run-off into the coastal ocean. In Long Bay, South Carolina, tidal creeks terminate in swashes—broad sandy fields constantly reworked by discharged creek water. We examined the role of a highly permeable sandy column in altering the nutrient loading of the passing water at Singleton Swash, Myrtle Beach, South Carolina. Seasonal transects along the swash’s primary channel documented gradients in physical and biogeochemical parameters. The nutrient and chlorophyll a concentrations were higher in the sediment than in the overlying water, consistent with coastal sediments as a major site of organic matter degradation, nutrient regeneration, and benthic primary productivity. Oxygen, nutrient, and chlorophyll concentrations exhibited a strong seasonal component, explained by a photosynthesis–respiration balance shift between summer and winter. The conservative mixing model approach to elucidate the sink–source patterns was moderately informative due to the lack of a gradual salinity gradient from land to ocean, due to substantial tidal flushing and observable nutrient-rich surface freshwater discharges along the channel that fueled substantial submerged aquatic macroalgal growth. Future studies should focus on the role of benthic photosynthesizers, both microbial and macroalgal, in retaining land-derived nutrients in irrigation freshwater inputs prior to them reaching the coastal ocean.

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An Ultrastructural Comparison of Hepatocytes from ADH+ and ADH−Peromyscus Maniculatus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100162612 ◽

1996 ◽

Vol 54 ◽

pp. 30-31

Author(s):

J. T. Ellzey ◽

D. Borunda ◽

B. P. Stewart

Keyword(s):

South Carolina ◽

Adult Male ◽

Uranyl Acetate ◽

Model System ◽

Deer Mice ◽

En Bloc ◽

Genetic Stock ◽

Hepes Buffer ◽

Transmission Electron ◽

Color Scanner

Genetically alcohol deficient deer mice (ADHN/ADHN) (obtained from the Peromyscus Genetic Stock Center, Univ. of South Carolina) lack hepatic cytosolic alcohol dehydrogenase. In order to determine if these deer mice would provide a model system for an ultrastructural study of the effects of ethanol on hepatocyte organelles, 75 micrographs of ADH+ adult male deer mice (n=5) were compared with 75 micrographs of ADH− adult male deer mice (n=5). A morphometric analysis of mitochondrial and peroxisomal parameters was undertaken.The livers were perfused with 0.1M HEPES buffer followed by 0.25% glutaraldehyde and 2% sucrose in 0.1M HEPES buffer (4C), removed, weighed and fixed by immersion in 2.5% glutaraldehyde in 0.1M HEPES buffer, pH 7.4, followed by a 3,3’ diaminobenzidine (DAB) incubation, postfixation with 2% OsO4, en bloc staining with 1% uranyl acetate in 0.025M maleate-NaOH buffer, dehydrated, embedded in Poly/Bed 812-BDMA epon resin, sectioned and poststained with uranyl acetate and lead citrate. Photographs were taken on a Zeiss EM-10 transmission electron microscope, scanned with a Howtek personal color scanner, analyzed with OPTIMAS 4.02 software on a Gateway2000 4DX2-66V personal computer and stored in Excel 4.0.

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South Carolina Must Support Communication of Inmates With Hearing Loss

ASHA Leader ◽

10.1044/leader.nib3.23062018.12 ◽

2018 ◽

Vol 23 (6) ◽

pp. 12-12

Keyword(s):

Hearing Loss ◽

South Carolina

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Use of the AMA Guides in State Workers' Compensation Systems: 2009 Update

Guides Newsletter ◽

10.1001/amaguidesnewsletters.2009.marapr02 ◽

2009 ◽

Vol 14 (2) ◽

pp. 13-16

Author(s):

Christopher R. Brigham ◽

Jenny Walker

Keyword(s):

New York ◽

North Carolina ◽

South Carolina ◽

South Dakota ◽

Rhode Island ◽

Workers Compensation ◽

Fourth Edition ◽

Sixth Edition ◽

Specific Guideline ◽

Compensation Systems

Abstract The AMAGuides to the Evaluation of Permanent Impairment (AMA Guides) is the most widely used basis for determining impairment and is used in state workers’ compensation systems, federal systems, automobile casualty, and personal injury, as well as by the majority of state workers’ compensation jurisdictions. Two tables summarize the edition of the AMA Guides used and provide information by state. The fifth edition (2000) is the most commonly used edition: California, Delaware, Georgia, Hawaii, Kentucky, New Hampshire, Idaho, Indiana, Iowa, Kentucky, Massachusetts, Nevada, North Dakota, Ohio, Vermont, and Washington. Eleven states use the sixth edition (2007): Alaska, Arizona, Louisiana, Mississippi, Montana, New Mexico, Oklahoma, Pennsylvania, Rhode Island, Tennessee, and Wyoming. Eight states still commonly make use of the fourth edition (1993): Alabama, Arkansas, Kansas, Maine, Maryland, South Dakota, Texas, and West Virginia. Two states use the Third Edition, Revised (1990): Colorado and Oregon. Connecticut does not stipulate which edition of the AMA Guides to use. Six states use their own state specific guidelines (Florida, Illinois, Minnesota, New York, North Carolina, and Wisconsin), and six states do not specify a specific guideline (Michigan, Missouri, Nebraska, New Jersey, South Carolina, and Virginia). Statutes may or may not specify which edition of the AMA Guides to use. Some states use their own guidelines for specific problems and use the Guides for other issues.

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