Metals Concentrations in the Sediments of Richard Lake, Sudbury Canada and Sediment Toxicity in an Amphipod Hyalella azteca

2007 ◽  
Vol 1 (1) ◽  
pp. 34-41 ◽  
Author(s):  
M. Shuhaimi-O
Keyword(s):  
Sediment Toxicity ◽  
Hyalella Azteca

Sediment toxicity testing with the freshwater amphipod Hyalella azteca: Relevance and application

Chemosphere ◽  
2005 ◽  
Vol 61 (11) ◽  
pp. 1740-1743 ◽  
Author(s):  
Uwe Borgmann ◽  
Lee Grapentine ◽  
Warren P. Norwood ◽  
Glen Bird ◽  
D. George Dixon ◽  
...  
Keyword(s):  
Sediment Toxicity ◽  
Toxicity Testing ◽  
Hyalella Azteca ◽  
Sediment Toxicity Testing

A FIELD ASSESSMENT OF LONG-TERM LABORATORY SEDIMENT TOXICITY TESTS WITH THE AMPHIPOD HYALELLA AZTECA

2005 ◽  
Vol 24 (11) ◽  
pp. 2853 ◽  
Author(s):  
Christopher G. Ingersoll ◽  
Ning Wang ◽  
Jeannie M.R. Hayward ◽  
John R. Jones ◽  
Susan B. Jones ◽  
...  
Keyword(s):  
Sediment Toxicity ◽  
Hyalella Azteca ◽  
Toxicity Tests ◽  
Field Assessment ◽  
Sediment Toxicity Tests

RECOVERY OF KNOWN-AGE HYALELLA AZTECA (AMPHIPODA) FROM SEDIMENT TOXICITY TESTS

1995 ◽  
Vol 14 (7) ◽  
pp. 1177 ◽  
Author(s):  
Michael J. Tomasovic ◽  
F. James Dwyer ◽  
Ivan E. Greer ◽  
Christopher G. Ingersoll
Keyword(s):  
Sediment Toxicity ◽  
Hyalella Azteca ◽  
Toxicity Tests ◽  
Sediment Toxicity Tests

Influence of pH and hardness on toxicity of ammonia to the amphipod Hyalella azteca

1995 ◽  
Vol 52 (10) ◽  
pp. 2078-2083 ◽  
Author(s):  
G. T. Ankley ◽  
M. K. Schubauer-Berigan ◽  
P. D. Monson
Keyword(s):  
Water Quality ◽  
North America ◽  
Sediment Toxicity ◽  
Water Hardness ◽  
Hyalella Azteca ◽  
Ammonia Toxicity ◽  
Total Ammonia ◽  
Baseline Values ◽  
Ph Dependent ◽  
Influence Of Ph

The amphipod Hyalella azteca is frequently used for freshwater sediment tests throughout North America. A common potential toxicant in sediments is ammonia. Our objective was to characterize the influence of two key water quality variables, pH and hardness, on toxicity of ammonia to the amphipod. Ninety-six hour, water-only exposures of H. azteca to ammonia were conducted using three different water types with hardnesses of 42, 100, and 270 mg/L as CaCO3 and three levels of pH (ca. 6.5, 7.5, and 8.5). In the soft water, toxicity of total ammonia was constant across test pH. As water hardness increased, toxicity of ammonia (on a total basis) to the amphipod decreased and became more pH dependent. Our data suggest that in softer water the amphipod was quite sensitive to the ionized (NH4+) form of ammonia. This contrasts with most other species that have been tested, which typically are more sensitive to un-ionized (NH3) ammonia than to NH4+. These data provide baseline values for interpreting the possible contribution of ammonia to sediment toxicity in tests conducted with H. azteca and also indicate that in some situations NH4+ may be important in determining ammonia toxicity.

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