The barnacle Balanus amphitrite as a biomonitor for Cd: radiolabelled experiments
Da Silva, Eduardo Teixeira, Ridd, Michael, and Klumpp, David (2009) The barnacle Balanus amphitrite as a biomonitor for Cd: radiolabelled experiments. Marine Environmental Research, 67 (4-5). pp. 177-182.
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Radiolabelled experiments were carried out to measure necessary parameters in the development of a biodynamic ecotoxicological Simulation model of Cd accumulation in the barnacle biomonitor Balanus amphitrite. The Cd uptake rate constant from the dissolved phase, the Cd assimilation efficiency (AE) from suspended particulate matter (SPM) and the efflux rate constant were obtained using Cd-109. A Cd uptake rate constant from the dissolved phase (k(u)) of 0.0072 L g(-1) h(-1) was determined for the barnacle under environmentally realistic dissolved Cd concentrations (maximum of 400 ng L-1). Cd AE from SPM was determined from the barnacle feeding on SPM with low and high chl a concentrations, resulting in AEs of 39.0% and 48.7%, respectively, and an efflux rate of 0.0072 d(-1). The difference between the AEs resulted from differences in chl a:SPM ratios suggesting a general tendency of higher AE when SPM is enriched with chl a. These results reinforce that the accuracy of ecotoxicological models for metal accumulation in organisms depends on how representative the selected food items are of the organism's natural diet.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||Balanus amphitrite; biomonitor; Cadmium-109; uptake rate; assimilation efficiency|
|FoR Codes:||03 CHEMICAL SCIENCES > 0399 Other Chemical Sciences > 039901 Environmental Chemistry (incl Atmospheric Chemistry) @ 50%|
07 AGRICULTURAL AND VETERINARY SCIENCES > 0701 Agriculture, Land and Farm Management > 070103 Agricultural Production Systems Simulation @ 50%
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970105 Expanding Knowledge in the Environmental Sciences @ 100%|
|Deposited On:||21 Apr 2010 13:36|
|Last Modified:||18 Oct 2013 01:00|
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