Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Stephan A. Ryba"'
Publikováno v:
Wetlands. 29:952-963
Mean soil respiration rates (carbon dioxide efflux from bare soils) among salt marshes in Narragansett Bay, RI ranged from 1.7–7.8 μmol m−2 s−1 inSpartina patens in high marsh zones and 1.7–6.0 μmol m−2 s−1 inS. alterniflora in low mars
Publikováno v:
Archives of Environmental Contamination and Toxicology. 50:539-544
The relationship between total mercury (Hg) concentration in fish scales and in tissues of largemouth bass (Micropterus salmoides) from 20 freshwater sites was developed and evaluated to determine whether scale analysis would allow a nonlethal and co
Publikováno v:
Environmental Monitoring and Assessment. 74:167-192
Stable nitrogen isotope ratios (δ15N) of freshwater mussels from a series of lakes and ponds wererelated to watershed land use characteristics to assess their utility in determining the source ofnitrogen inputs to inland water bodies. Nitrogen isoto
Publikováno v:
Water Research. 35:4390-4404
The partitioning of nonpolar organic contaminants to marine sediments is considered to be controlled by the amount of organic carbon present. However, several studies propose that other characteristics of sediments may affect the partitioning of cont
Autor:
John Kiddon, Richard J. Pruell, James L. Lake, Frank A. Osterman, Stephan A. Ryba, Alan D Libby, Richard A. McKinney
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 58:870-878
Stable nitrogen isotope ratios (δ15N) were measured in fish, mussel, and sediment samples taken from 17 small freshwater sites to examine food chain length and trophic position across sites affected by differing levels of anthropogenic activity. Bot
Autor:
Jonathan R. Serbst, Kay T. Ho, Marguerite C. Pelletier, Mark G. Cantwell, Robert M. Burgess, Stephan A. Ryba
Publikováno v:
Environmental Toxicology and Chemistry. 19:2691-2698
Laboratory experiments were conducted to determine if maternal transfer of polycyclic aromatic hydrocarbons (PAHs) from benthic adult bivalves could result in phototoxicity to their pelagic larvae when exposed to ultraviolet light (UV). In these expe
Publikováno v:
Toxicological & Environmental Chemistry. 77:9-29
The current study was conducted to investigate the importance of organic carbon quantity on the detection of statistical differences in the partitioning of three nonpolar organic chemicals (Lindane, fluoranthene, and a tetrachlorobiphenyl) to five ma
Publikováno v:
Hydrobiologia. 412:17-24
Freshwater mussels have been used to establish base level nitrogen isotope ratio values (δ15N) used in trophic position and food web studies in freshwater ecosystems. In this study, we assess the variability introduced when using unionid mussels in
Autor:
Stephan A. Ryba, Robert M. Burgess
Publikováno v:
Chemosphere. 36:2549-2568
The bioavailability of sediment contaminants may be reduced by the presence of interstitial colloids; therefore, being able to efficiently isolate colloidal phase contaminants is important to predicting adverse biological effects. Reverse phase chrom
Autor:
Robert M. Burgess, Anne Kuhn, Kay T. Ho, Stephan A. Ryba, Richard A. McKinney, Marguerite C. Pelletier
Publikováno v:
Environmental Toxicology and Chemistry. 16:2190-2199
Phototoxicity resulting from photoactivated polycyclic aromatic hydrocarbons (PAHs) has been reported in the literature for a variety of freshwater organisms. The magnitude of increase in PAH toxicity often exceeds a factor of 100. In the marine envi