Mucus secretion by the freshwater snail Lymnaea stagnalis limits aluminum concentrations of the aqueous environment

Article Abstract:

The extracellular mucopolysaccharide (EPS) secreted by snails was found to be an efficient instrument in limiting the concentration of soluble aluminum in freshwater systems. This was shown by examining the EPS secreted by the freshwater snail Lymnaea stagnalis that is placed in a medium with an aluminum concentration of 500 microgram/ liter. The EPS was shown to have the ability to bind the soluble aluminum and affecting the binding property of the aluminum left in the solution. This was done without binding the aluminum to the substrate. Bioaccumulation of aluminum in Lymnaea was found to only in small quantities.

Ecological Sciences, Environmental sciences, Snails

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Effect of sedimentary organic matter composition on the partitioning and bioavailability of dieldrin to the oligochaete Lumbriculus variegatus

Article Abstract:

Sedimentary organic matter composition was a big factor in the partitioning and bioavailability of dieldrin to Lumbriculus variegatus. The variations in partitioning of the four sediments examined, which have different sediment composition and organic matter content, are due to the amount of sedimentary organic matter that was solvent extractable. Several other factors such as partition coefficients, growth rates of organisms, and the humic substance content, pH, particle size, and extract weight of sediments may also affect the partitioning and bioavailability of deldrin.

Pesticide and Other Agricultural Chemical Manufacturing, Agricultural chemicals, not elsewhere classified, Insecticides, Soil pollution, Bioavailability, Dieldrin

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Relative importance of ingested sediment and pore water as bioaccumulation routes for pyrene to oligochaete (Lumbriculus variegatus, Muller)

Article Abstract:

Ingested sediment and pore water prove useful as bioaccumulation routes for pyrene to oligochaete. Results from the exposure of individual oligochaetes for different size to radiolabeled pyrene revealed that pyrene accumulated mainly through ingested material. The different uptake clearance rates observed between worm groups, however, could be due to the decreasing bioavailability of pyrene.

Pollution R&D NEC, Pollution, Control, Pollution control research

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