Heavy metal concentrations in surficial sediments and benthic macroinvertebrates from Anzali wetland, Iran

Pourang, Nima

doi:10.1007/bf00025407

Cited by 54 publications

(48 citation statements)

References 12 publications

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“…Some researchers found that filter-feeder species, as Mollusks, accumulate more Mn, Cu, Zn and Pb than Chironomidae species, (not analyzed in Chironomus species) 18 and some metals, appeared to be accumulated in the upper trophic levels as fishes, reptiles, birds, mammals and other organisms. 32,35 Although predator species can accumulate high concentrations of metals, our results point that, depending on the sediments contamination, the collector organisms as Chironomus larvae, because of their close association with the sediments (benthic organisms) and functional feeding group, accumulate higher concentrations of metals than other groups of aquatic insects.…”

Section: Discussionmentioning

confidence: 99%

“…Then, they were identified and frozen at -20 ºC in order to perform the metal analyses. 18 Due to the importance of the amount of organic matter of the sediment in the metal absorption in the aquatic system, 23 three sediment sub-samples were collected from the streams for organic matter determination.…”

Section: Sampling and Storagementioning

confidence: 99%

“…Digestion and detection were undertaken in triplicate. 18 The detection limits were: Al -0,002 mg L Organic matter was determined by mass loss after ignition (550 ºC, 4 h) in dry fractions of sediments (dried in a stove at 60 ºC for 12 h), in accordance with the techniques described in the literature. 26 …”

Section: Analytical Proceduresmentioning

confidence: 99%

“…17 Aquatic insects can accumulate metals directly from the sediments or by food ingestion and, for such reasons, some species can accumulate more metals than other ones, based in their life cycle. 18 When transferred through macroinvertebrate food webs, vertical (trophic level) and horizontal (diet at any given trophic level) position can be considered as important factors for determining metal concentrations in tissues of different species. Horizontal trophic position, i.e., differences in diet within a trophic level, may be an important determinant of metal concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Bioaccumulation of metals in aquatic insects of streams located in areas with sugar cane cultivation

Corbi¹,

Froehlich²,

Strixino³

et al. 2010

Quím. Nova

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Recebido em 6/5/09; aceito em 29/9/09; publicado na web em 23/2/10 Streams located in areas of sugar cane cultivation receive elevated concentrations of metal ions from soils of adjacent areas. The accumulation of metals in the sediments results in environmental problems and leads to bioaccumulation of metal ions by the aquatic organisms. In the present study, bioaccumulation of the metals ions Al, Cd, Cr, Cu, Fe, Mg, Mn and Zn in aquatic insects in streams impacted by the sugar cane was evaluated. The results pointed out that the insects were contaminated by the sediment and that the collector organisms as Chironomus species accumulated higher concentration of metals than the predator organisms.

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Section: Discussionmentioning

confidence: 99%

Section: Sampling and Storagementioning

confidence: 99%

Section: Analytical Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bioaccumulation of metals in aquatic insects of streams located in areas with sugar cane cultivation

Corbi¹,

Froehlich²,

Strixino³

et al. 2010

Quím. Nova

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show abstract

“…Pourang (1996) found the species in the Anzali wetland (connected with the Caspian Sea) in Northern Iran. Ahmadi et al (2012) found T. tubifex in the Zarrineh River in the West Azarbaijan Province.…”

Section: Stylaria Lacustris (Linnaeus 1767)mentioning

confidence: 98%

Five species of aquatic oligochaetes new to Iran with an updated checklist

Jabłońska

Pešić

2014

Oceanological and Hydrobiological Studies

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Only 14 species of aquatic oligochaetes occurring in inland waters of Iran have been recorded until now. Our investigations based on samples collected in 2003 and 2005 revealed the presence of six species, including five new to the fauna of Iran: Haplotaxis gordioides, Dero dorsalis, Pristina breviseta, Embolocephalus velutinus and Psammoryctides albicola. The provided checklist of Iranian aquatic oligochaetes is still very short (19 species). It is mostly represented by common, cosmopolitan species. However, taking into account the large area of the country, its mountainous terrain and peculiar hydrological network, more species may be discovered in the future.

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Efficient shedding of accumulated metals during metamorphosis in metal‐adapted populations of the midge Chironomus riparius

Groenendijk

Kraak

Admiraal

1999

Enviro Toxic and Chemistry

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Metal accumulation and loss during metamorphosis were investigated in Chironomus riparius populations in a metal contaminated lowland river. Cadmium and zinc levels were measured in imagoes and larvae at reference and metal‐exposed sites. It was hypothesized that the relationship between metal concentrations in biota and environmental compartments would be influenced by the presence of metal‐adapted chironomids. In contrast to the large interpopulation differences in larval body burdens of cadmium, body burdens in imagoes vanished to background levels for all midge populations. This indicated that any cadmium accumulated in larval stages was lost during metamorphosis. This nearly 100% efficiency in shedding of cadmium is most likely caused by an increased metal handling capacity present in exposed midges. In agreement with the cadmium measurements, larval body burdens of zinc showed also highly significant interpopulation differences. In contrast with the cadmium values, however, body burdens of zinc in imagoes showed highly significant interpopulation differences and differences were even recorded between the two exposed sites, indicating interpopulation differences in shedding capacity for zinc. It is concluded that the highly efficient shedding of accumulated metals reflected the metal adaptation recorded in earlier studies of metal‐exposed C. riparius populations from the River Dommel. Based on the differences in metal accumulation and the differences found in shedding of metals between the two exposed midge populations, it was concluded that population differentiation due to metal stress is a gradual process rather than an all‐or‐nothing situation.

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Heavy metal concentrations in surficial sediments and benthic macroinvertebrates from Anzali wetland, Iran

Cited by 54 publications

References 12 publications

Bioaccumulation of metals in aquatic insects of streams located in areas with sugar cane cultivation

Bioaccumulation of metals in aquatic insects of streams located in areas with sugar cane cultivation

Five species of aquatic oligochaetes new to Iran with an updated checklist

Efficient shedding of accumulated metals during metamorphosis in metal‐adapted populations of the midge Chironomus riparius

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