Topic
Bioaccumulation
About: Bioaccumulation is a research topic. Over the lifetime, 7112 publications have been published within this topic receiving 208953 citations. The topic is also known as: bioakumulace.
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TL;DR: The present study was performed to investigate metal behavior at a higher trophic level, and the mole was chosen a representative of the terrestrial decomposer subsystem, as earthworms are the preferred food of moles and they provide the major source of ingested metals to these animals.
Abstract: Bioaccumulation studies in animals can supply valuable information to supplement the data obtained by chemical analysis of pollutants in abiotic samples. With respect to the terrestrial ecosystem, suitable indicator species in the decomposer subsystem can be identified on the basis of functional characteristics and trophic level. Investigations on metal behavior at the first trophic level, done in lumbricid earthworms showed that the potential for bioaccumulation depends on the degree of contamination as well as on the metal-binding capacity of the soil. The present study was performed to investigate metal behavior at a higher trophic level, and the mole (Talpa europea) was chosen a representative of the terrestrial decomposer subsystem. As earthworms are the preferred food of moles, they provide the major source of ingested metals to these animals. The food chain involving earthworms and moles provides an example of a critical pathway for potentially toxic non-essential metals such as cadmium and lead.
79 citations
TL;DR: In this article, a series of hydroponic experiments were conducted to investigate impact of four types of TiO2 NPs, including one anatase (NAnT), one pristine rutile (NRuT) and two rutiles with hydrophilic and hydrophobic surfaces (NLRuT, NBRuT), as well as the bulk particles (BT), on the bioaccumulation of lead (Pb) by rice (Oryza sativa) seedlings.
79 citations
TL;DR: Results of significant bioaccumulation of Cd, in terms of hepatic concentrations and bio Accumulation factors, indicated that S. basilisca can be used as bioindicator to evaluate the evolution of C d pollution in the Gulf of Gabes.
Abstract: To select a marine teleost fish which can be used as a bioindicator of cadmium (Cd) pollution in the Gulf of Gabes in Tunisia, Cd concentrations in liver and gill were compared in three benthic fish species including Salaria basilisca, Zosterisessor ophiocephalus and Solea vulgaris. Fish samples were collected from three selected sites in the Gulf of Gabes, with different degrees of Cd contamination: the industrialized coast of Sfax (S1), the coast of Douar Chatt (S2) and the coast of Luza (S3). The results shows that Cd concentrations in both sediment and water collected from S1 were significantly higher (p S2 > S3. The highest concentration of Cd was detected in the liver of S. basilisca, and only S. basilisca showed bioaccumulation factors (BAF) greater than 1 in all studied sites. In S1 and S2, BAF values respect the following order: S. basilisca > Z. ophiocephalus > S. vulgaris. These results of significant bioaccumulation of Cd, in terms of hepatic concentrations and bioaccumulation factors, indicated that S. basilisca can be used as bioindicator to evaluate the evolution of Cd pollution in the Gulf of Gabes.
78 citations
TL;DR: This work and other studies indicate that for many deposit feeders, ingested sediment can be the primary source for the bioaccumulation of hydrophobic toxicants.
Abstract: A mass-balance bioaccumulation model was used to examine the bioaccumulation of benzo[a]pyrene (BaP) from ingested sediment by the deposit-feeding polychaete Abarenicola pacifica over a series of experiments employing nine different sediments Through selective ingestion of fine-grained material, the worm was able to increase the BaP content of ingested sediment by 10-35% above that of the bulk material During digestion, an average of 5-21% of the ingested BaP was absorbed from gut contents The relative importance of ingestion as a route of BaP uptake was dependent on the time period of observation Initial uptake of BaP was postulated to come from absorption of dissolved BaP across the body wall since, after short periods of exposure (<24 h), only 3-38% of observed BaP tissue concentrations could have been derived from ingested material With time and with increased feeding activity, however, ingested sediment became the major source of BaP to the organism After 72 h of exposure, 36-119% of the tissue BaP (mean = 77%) was estimated to have been derived from dietary absorption of ingested material, and with continued exposure the dietary route is likely to be as great or greater as the relative significance of the initial uptake from the dissolved phase diminishes This work and other studies indicate that for many deposit feeders, ingested sediment can be the primary source for the bioaccumulation of hydrophobic toxicants
78 citations
TL;DR: There seems to be a common link between intracellular localisation of Cd in metal-binding proteins and Cd containing vesicles as detoxifying mechanisms in the marine organisms.
Abstract: Cadmium (Cd) occurs in very low concentrations in open ocean water, averaging about 40 ng/1 in unpolluted surface waters57. Similarly, Eaton43 and Bewers et al.10 suggested the background concentration of Cd for North Atlantic surface waters to be 40–60 ng/1. The level for Pacific oceanic water is 36 ng/119. Increased concentrations have been observed in the Mediterranean, Baltic, and North Sea, where circulation and water mass turnover are limited. Cadmium level in coastal and estuarine water normally is higher, primarily due to weathering and anthropogenic inputs; levels higher by several orders of magnitude have been reported1,13,31,68,82,133.
78 citations