Invertebrates Minimize Accumulation of Metals and Metalloids in Contaminated Environments

• Published in: Water, air, and soil pollution air, and soil pollution, 2011-06, Vol.218 (1-4), p.227-233
• Main Authors: Schaller, Joerg, Brackhage, Carsten, Dudel, E. Gert
• Format: Article
• Language: English
• Subjects: Animal, plant and microbial ecology; Applied ecology; Arsenic; Atmospheric Protection/Air Quality Control/Air Pollution; Biological and medical sciences; Cadmium; Climate Change/Climate Change Impacts; Contamination; Copper; Desorption; Drinking water; Earth and Environmental Science; Ecotoxicology, biological effects of pollution; Environment; Environmental impact; Environmental monitoring; Experiments; Food; Food chains; Food contamination; Food contamination & poisoning; Food webs; Fundamental and applied biological sciences. Psychology; Gammarus pulex; General aspects; Health aspects; Heavy metals; Hydrogeology; Invertebrates; Laboratories; Lead; Leaves; Metal concentrations; Metals; Mortality; Phosphorus; Pollutants; Sediment pollution; Sediments; Sediments (Geology); Soil Science & Conservation; Stream water; Studies; Toxicity; Uranium; Water pollution; Water Quality/Water Pollution; Zinc
• ISSN: 0049-6979; 1573-2932
• DOI: 10.1007/s11270-010-0637-0

Many studies were conducted measuring the lethal concentration of pollutants by using a contaminated solution or polluted sediments. Considering the impact of polluted food on mortality and uptake quantity of invertebrate shredders in batch cultures, little is known about, e.g. uranium and cadmium. Consequently, we investigated in situ the impact of metal and metalloid polluted food and water on Gammarus pulex L. under nature-like conditions. In contrast to other publications, a very low mortality rate of the invertebrates was found. Furthermore, fixation of elements by G. pulex was shown to be low compared to initial concentrations. Fixation of non essential metals and metalloids is shown to take place mainly on the surface of the invertebrates. This is deduced from easy desorption of a relevant amount of fixed metals and metalloids. It is concluded that the accumulation of metals and metalloids in situ under nature-like conditions within the food web via invertebrate shredders is very low. The invertebrates seem to minimize the uptake of non essential elements in the presence of nutrient-rich food even in habitats with higher contamination levels. Hence, invertebrates seem to be adapted to higher contamination levels in their favourable habitats.