Spatial and temporal trends of mercury in the aquatic food web of the lower Penobscot River, Maine, USA, affected by a chlor-alkali plant

2019 ◽  
Vol 649 ◽  
pp. 770-791 ◽  
Author(s):  
A. Dianne Kopec ◽  
Karen A. Kidd ◽  
Nicholas S. Fisher ◽  
Marcia Bowen ◽  
Corey Francis ◽  
...  
Keyword(s):  
Food Web ◽  
Temporal Trends ◽  
Aquatic Food Web ◽  
Penobscot River ◽  
Aquatic Food ◽  
Spatial And Temporal Trends

scholarly journals Modeling vitamin B1 transfer to consumers in the aquatic food web

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
M. J. Ejsmond ◽  
N. Blackburn ◽  
E. Fridolfsson ◽  
P. Haecky ◽  
A. Andersson ◽  
...  
Keyword(s):  
Food Web ◽  
Vitamin B1 ◽  
Aquatic Food Web ◽  
Aquatic Food

scholarly journals The influence of fish cage culture on δ13C and δ15N of filter-feeding Bivalvia (Mollusca)

2013 ◽  
Vol 73 (4) ◽  
pp. 743-746
Author(s):  
E. Benedito ◽  
L. Figueroa ◽  
A.M Takeda ◽  
GI. Manetta
Keyword(s):  
Food Web ◽  
Native Species ◽  
Corbicula Fluminea ◽  
Cage Culture ◽  
Aquatic Food Web ◽  
Δ13c And Δ15n ◽  
Value Analysis ◽  
Fine Powders ◽  
Before And After ◽  
Aquatic Food

The objective of this study was to evaluate the effect of Oreochromis niloticus cage culture promoted variations in the δ13C and δ15N in Corbicula fluminea (Mollusca; Bivalvia) and in the sediment of an aquatic food web. Samples were taken before and after net cage installation in the Rosana Reservoir (Paranapanema River, PR-SP). Samples of specimens of the bivalve filterer C. fluminea and samples of sediment were collected using a modified Petersen grab. All samples were dried in an oven (60 °C) for 72 hours, macerated to obtain homogenous fine powders and sent for carbon (δ13C) and nitrogen (δ15N) isotopic value analysis in a mass spectrometer. There were significant differences in the δ13C and δ15N values of the invertebrate C. fluminea between the beginning and the end of the experiment. There were no differences between the δ13C and δ15N values of sediment. These results indicate that the installation of fish cage culture promoted impacts in the isotopic composition of the aquatic food web organisms, which could exert influence over the native species and the ecosystem.

Microcystin-LR concentration in aquatic food web compartments from lakes of varying trophic status

1996 ◽  
Vol 53 (9) ◽  
pp. 1974-1985 ◽  
Author(s):  
B.G. Kotak ◽  
R.W. Zurawell ◽  
E.E. Prepas ◽  
C.F.B. Holmes
Keyword(s):  
Food Web ◽  
Trophic Status ◽  
Aquatic Food Web ◽  
Aquatic Food

Methylmercury levels and bioaccumulation in the aquatic food web of a highly mercury-contaminated reservoir

2011 ◽  
Vol 37 (7) ◽  
pp. 1213-1218 ◽  
Author(s):  
Luis Carrasco ◽  
Lluís Benejam ◽  
Josep Benito ◽  
Josep M. Bayona ◽  
Sergi Díez
Keyword(s):  
Food Web ◽  
Aquatic Food Web ◽  
Aquatic Food

scholarly journals Closely Related Tree Species Differentially Influence the Transfer of Carbon and Nitrogen from Leaf Litter Up the Aquatic Food Web

Ecosystems ◽  
2014 ◽  
Vol 18 (2) ◽  
pp. 186-201 ◽  
Author(s):  
Zacchaeus G. Compson ◽  
Bruce A. Hungate ◽  
George W. Koch ◽  
Steve C. Hart ◽  
Jesse M. Maestas ◽  
...  
Keyword(s):  
Food Web ◽  
Leaf Litter ◽  
Tree Species ◽  
Aquatic Food Web ◽  
Carbon And Nitrogen ◽  
Aquatic Food

BEHAVIORAL RESPONSES TO SUBLETHAL CADMIUM EXPOSURE WITHIN AN EXPERIMENTAL AQUATIC FOOD WEB

2005 ◽  
Vol 24 (2) ◽  
pp. 431 ◽  
Author(s):  
David J. Riddell ◽  
Joseph M. Culp ◽  
Donald J. Baird
Keyword(s):  
Food Web ◽  
Behavioral Responses ◽  
Cadmium Exposure ◽  
Aquatic Food Web ◽  
Aquatic Food

Temporal trends of polychlorinated biphenyls (PCBs) in Lake Ontario fish and invertebrates

1999 ◽  
Vol 7 (4) ◽  
pp. 203-223 ◽  
Author(s):  
E Bentzen ◽  
D Mackay ◽  
B E Hickie ◽  
D RS Lean
Keyword(s):  
Food Web ◽  
Lake Trout ◽  
Temporal Trends ◽  
Lake Ontario ◽  
Fish Food ◽  
International Joint Commission ◽  
Analytical Protocol ◽  
Fish Lipid ◽  
Key Species ◽  
Aquatic Food

A comprehensive review is presented of changes of PCB concentrations in aquatic biota collected from Lake Ontario between 1977 and 1993, with emphasis on data for lake trout. Results of three major lake trout surveys from Canadian and United States agencies indicate lake trout PCBs have declined from the early 1980s, but changes in recent years are masked by interannual variability. These results also apply to other biota in the aquatic food web. PCB concentrations were consistent among the surveys after consideration of fish lipid content, age or size and analytical protocol. Variability of 20 to 30% in annual average estimates is attributed to both analytical and in situ sources. Current levels of PCBs in many salmonids exceed PCB consumption and wildlife protection advisories. The average half-life for PCBs in Lake Ontario biota is about 12 years and it will take three to four times that to reach the International Joint Commission target of 100 ng/g (ww) for protection of wildlife. It is essential that the design of monitoring programs ensures consistent, coordinated sampling and analysis. A monitoring strategy of annual sampling of key species supplemented with periodic intensive sampling of the entire food web (e.g., every 5 years) is suggested as more effective than current practices. There is a frequently neglected need for fuller interpretation of contaminant dynamics based on complementary research on the nature of the changing biotic and abiotic environments in a complex aquatic ecosystem like Lake Ontario. Key words: Lake Ontario, PCBs, fish, food webs, monitoring data, bioaccumulation.

Interactions of multiple predators with different foraging modes in an aquatic food web

Oecologia ◽  
2009 ◽  
Vol 162 (2) ◽  
pp. 443-452 ◽  
Author(s):  
Michael P. Carey ◽  
David H. Wahl
Keyword(s):  
Food Web ◽  
Aquatic Food Web ◽  
Multiple Predators ◽  
Foraging Modes ◽  
Aquatic Food
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