Hg(II) Adsorption by Bacteria:  A Surface Complexation Model and Its Application to Shallow Acidic Lakes and Wetlands in Kejimkujik National Park, Nova Scotia, Canada

2002 ◽  
Vol 36 (7) ◽  
pp. 1546-1553 ◽  
Author(s):  
Christopher J. Daughney ◽  
Steven D. Siciliano ◽  
Andrew N. Rencz ◽  
David Lean ◽  
Danielle Fortin
Keyword(s):  
Nova Scotia ◽  
National Park ◽  
Surface Complexation ◽  
Surface Complexation Model ◽  
Acidic Lakes ◽  
Kejimkujik National Park

Mercury biomagnification in the food webs of acidic lakes in Kejimkujik National Park and National Historic Site, Nova Scotia

2009 ◽  
Vol 66 (9) ◽  
pp. 1532-1545 ◽  
Author(s):  
Brianna Wyn ◽  
Karen A. Kidd ◽  
Neil M. Burgess ◽  
R. Allen Curry
Keyword(s):  
Nova Scotia ◽  
Food Web ◽  
National Park ◽  
Yellow Perch ◽  
Trophic Position ◽  
Neutral Systems ◽  
Historic Site ◽  
Acidic Lakes ◽  
Top Predators ◽  
Kejimkujik National Park

Mercury (Hg) concentrations in fish from acidic lakes (pH < 6.0) are typically elevated above those from near-neutral systems. It is unknown whether high biomagnification rates through the supporting food web can explain elevated Hg concentrations in top predators from low pH lakes. To investigate this, we collected yellow perch ( Perca flavescens ), brown bullhead ( Ameiurus nebulosus ), banded killifish ( Fundulus diaphanous ), golden shiner ( Notemigonus crysoleucas ), and littoral and pelagic invertebrates from four acidic lakes in Kejimkujik National Park and Historic Site (KNPNHS), Nova Scotia, Canada, and analyzed them for total Hg and methyl Hg (MeHg), and δ13C and δ15N to determine sources of energy and trophic position, respectively. Mercury biomagnification rates (slopes of log Hg versus δ15N) varied significantly among the four lakes but did not explain the among-lake differences in perch Hg; these slopes were also within the range published for near-neutral systems. Rather, Hg concentrations in yellow perch (i.e., predatory fish) in KNPNHS were higher in lakes with higher MeHg in lower-trophic-level organisms and suggest that processes influencing Hg uptake at the base of the food web are more important than rates of food web biomagnification for understanding the variation in concentrations of this contaminant among top predators.

Are Methylmercury Concentrations in the Wetlands of Kejimkujik National Park, Nova Scotia, Canada, Dependent on Geology?

2003 ◽  
Vol 32 (6) ◽  
pp. 2085-2094 ◽  
Author(s):  
Steven D. Siciliano ◽  
Al Sangster ◽  
Chris J. Daughney ◽  
Lisa Loseto ◽  
James J. Germida ◽  
...  
Keyword(s):  
Nova Scotia ◽  
National Park ◽  
Kejimkujik National Park
Sign in / Sign up

Export Citation Format

Share Document