Assigning hydrogen, carbon, and nitrogen isotope values for phytoplankton and terrestrial detritus in aquatic food web studies

Inland Waters ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 233-242 ◽  
Author(s):  
Carol Yang ◽  
Grace Wilkinson ◽  
Jonathan Cole ◽  
Stephen Macko ◽  
Michael Pace
Keyword(s):  
Food Web ◽  
Nitrogen Isotope ◽  
Aquatic Food Web ◽  
Web Studies ◽  
Carbon And Nitrogen ◽  
Aquatic Food

The Use of Carbon and Nitrogen Stable Isotope Analysis to Characterize Food Web Changes in Aquatic Systems for Reclamation of Oil Sands Process-Affected Materials

2009 ◽  
Vol 44 (4) ◽  
pp. 313-322 ◽  
Author(s):  
Monalisa Elshayeb ◽  
Michael D. MacKinnon ◽  
D. George Dixon ◽  
Michael Power
Keyword(s):  
Food Web ◽  
Oil Sands ◽  
Isotope Analysis ◽  
Naphthenic Acid ◽  
Carbon Sources ◽  
Nitrogen Isotope ◽  
Isotopic Signatures ◽  
Carbon And Nitrogen ◽  
Aquatic Food ◽  
Northern Alberta

Abstract One strategy for reclamation of oil sands leases in northern Alberta is the construction of lakes and wetlands by capping oil sands process-affected material (OSPM) with water. To assess this approach, experimental sites containing a range of OSPM have been constructed to monitor the evolution of the resulting aquatic habitats. Stable isotopes of carbon and nitrogen were used to assess the effects of OSPM on aquatic food webs. Carbon and nitrogen isotopic signatures of sediment, dissolved inorganic and organic carbon, particulate organic matter, periphyton, plants, plankton, aquatic invertebrates, and fish were used to assess differences related to the naphthenic acid (NA) concentration in OSPM and reference sites. NAs are a principal contaminant of concern in OSPM. Sites were grouped into low (0 to 4 mg/L), medium (4 to 15 mg/L), and high (>15 mg/L) NA concentrations. There were no significant differences in food web area or length among the three NA groupings. In most cases, carbon isotope analyses of samples from low, medium, and high NA concentration sites were not significantly different, suggesting that OSPM is not a significant contributor to food web carbon sources. Significant differences were found in nitrogen isotope signatures between low, medium, and high NA sites. Ammonia from OSPM is suggested as the main contributor to δ15N enrichment.

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
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