Arsenic Speciation and Seasonal Changes in Nutrient Availability and Micro-plankton Abundance in Southampton Water, U.K.

Howard, A.G.; Comber, Sean; Kifle, Demeke; Antai, E.E.; Purdie, Duncan A.

doi:10.1006/ecss.1995.0030

Cited by 70 publications

(50 citation statements)

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“…Frequent occurrence of DMAA than that of As(III) has been reported by Howard et al (1995) at higher water temperatures. Sohrin et al (1997b) also observed correlation between the concentration of DMAA and water temperature in Lake Biwa, Japan.…”

Section: Trophic Classification Of Lakesmentioning

confidence: 79%

“…Microorganisms produce methylarsenicals in natural waters (Sanders and Riedel, 1993), which exhibit seasonal cycle with maximum concentrations of methylarsenicals in summer (Hasegawa et al, 1999;Howard et al, 1995;Sohrin et al, 1997a).…”

mentioning

confidence: 99%

“…Sanders and Riedel (1993) reported the correlation between As(III)/methylarsenicals and chlorophyll-a concentrations and/or phytoplankton density, while Howard et al (1995) found that the seasonal changes of DMAA concentration is related to the temperature rather then the biological activity of phytoplankton. The bulk of other organoarsenicals are also found in organisms (Maeda, 1994).…”

mentioning

confidence: 99%

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Seasonal changes of arsenic speciation in lake waters in relation to eutrophication

Hasegawa

Rahman

Kitahara

et al. 2010

Science of The Total Environment

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Section: Trophic Classification Of Lakesmentioning

confidence: 79%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Seasonal changes of arsenic speciation in lake waters in relation to eutrophication

Hasegawa

Rahman

Kitahara

et al. 2010

Science of The Total Environment

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“…Methylarsenic species would be produced by phytoplankton uptaking inorganic arsenic with phosphorus, according to previous field data [25][26][27] and laboratory experiments. [28][29][30] However, in Lake Kahokugata and Lake Kibagata, where chlorophyll a was present, methylarsenic species were not detected, while only inorganic arsenic was detected at the nM order in the two lakes.…”

Section: Discussionmentioning

confidence: 99%

Classification for Dimethylarsenate-decomposing Bacteria Using a Restrict Fragment Length Polymorphism Analysis of 16S rRNA Genes

et al. 2004

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A new monitoring system for bacterial communities involving dimethylarsinic acid (DMAA) decomposition was provided by combining the MPN (Most Probable Number) method and RFLP (restriction-fragment-length polymorphism analysis). The abundance of DMAA decomposing bacteria was estimated by the MPN method using a bacterial culture medium, which included DMAA as the sole carbon source, indicating bacterial cell densities of 1700 cells/ml in Lake Kahokugata and 330 cells/ml in Lake Kibagata. After isolating the dominant bacteria using agar plates, the isolates were classified into some genotype groups by RFLP analysis using 16S rDNA sequences. Classification of the RFLP analysis indicated that 14 isolates of Lake Kahokugata were classified into 6 types, which included 2 dominant types related to genus Pseudomonas, while 8 isolates of Lake Kibagata displayed 6 types including one or two isolates. Moreover, the RFLP types were unique for each lake, suggesting that DMAA decomposing bacteria were specific for the aquatic environment related to the arsenic cycle. The activities of DMAA decomposition mostly matched with the RFLP type category of the isolates. Accordingly, combining the MPN method with the RFLP analysis will play an important role in elucidating the distributions and dynamics of the DMAA-decomposing bacterial community.

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“…Aquatic micro-organisms such as phytoplankton and bacteria keep a significant role in arsenic speciation, distribution and cycling in aquatic ecosystems (Howard et al 1995;Hasegawa et al 2001;Hellweger and Lall 2004;Sharma and Sohn 2009). Phytoplankton species are responsible for the conversion of inorganic arsenic into methylarsenicals and high order organic arsenic compounds such as arsenosugars, whereas bacteria play an important role for the mineralization of organic arsenic to methylarsenicals (Francesconi and Edmonds 1996;Hanaoka et al 1995).…”

Section: Arsenicmentioning

confidence: 99%

Harmful Elements in Estuarine and Coastal Systems

Khan

Masiol

Hofer

et al. 2014

PHEs, Environment and Human Health

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Estuaries and coastal zones are dynamic transitional systems which provide many economic and ecological benefits to humans, but also are an ideal habitat for other organisms as well. These areas are becoming contaminated by various anthropogenic activities due to a quick economic growth and urbanization. This chapter explores the sources, chemical speciation, sediment accumulation and removal mechanisms of the harmful elements in estuarine and coastal seawaters. It also describes the effects of toxic elements on aquatic flora and fauna. Finally, the toxic element pollution of the Venice Lagoon, a transitional water body located in the northeastern part of Italy, is discussed as a case study, by presenting the procedures adopted to measure the extent of the pollution, the impacts on organisms and the restoration activities.

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Arsenic Speciation and Seasonal Changes in Nutrient Availability and Micro-plankton Abundance in Southampton Water, U.K.

Cited by 70 publications

References 0 publications

Seasonal changes of arsenic speciation in lake waters in relation to eutrophication

Seasonal changes of arsenic speciation in lake waters in relation to eutrophication

Classification for Dimethylarsenate-decomposing Bacteria Using a Restrict Fragment Length Polymorphism Analysis of 16S rRNA Genes

Harmful Elements in Estuarine and Coastal Systems

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