Distribution of heavy metals in the dissolved and suspended phase of the sea-surface microlayer, seawater column and in sediments of Singapore’s coastal environment

Cuong, Dang The; Karuppiah, Subramanian; Obbard, Jeffrey Philip

doi:10.1007/s10661-007-9795-y

Cited by 58 publications

(25 citation statements)

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“…The range in the amount of Zn addition was quite large in the present study (~475 μg Zn l -1 ), and it would be useful to evaluate the effect of Zn in highly polluted areas (e.g. Reddy et al 2005, Cuong et al 2008. However, the level of Zn concentration in unpolluted areas would be relatively lower (around 1 μg Zn l -1 ), implying that it will be an important issue to investigate the impact of Zn at the lower concentration level (e.g.…”

Section: Effect Of Zn On the Remineralisation Of Natural Dommentioning

confidence: 76%

“…In addition, much of the runoff of Zn occurs not only from human activity but also derives from natural environments (Hoshika & Shiozawa 1986). These findings indicate concentrations of Zn that are several orders of magnitude higher in many coastal environments when compared to other toxic heavy metals such as cadmium, copper and lead (Shitashima & Tsubota 1990, Reddy et al 2005, Cuong et al 2008). …”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

“…Aquat Microb Ecol 63: [47][48][49][50][51][52][53][54][55][56][57][58][59] 2011 higher concentrations of pollutants have been detected in coastal areas (Reddy et al 2005, Cuong et al 2008, Siddique et al 2009) when compared to oceanic regions (Ellwood & Van den Berg 2000, Fukuda et al 2000. Because some of the chemicals can alter biological activities (e.g.…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

“…In addition, Zn is related to the activities of various kinds of enzyme, such as metalloprotease (Hase & Finkelstein 1993, Ogino et al 1999, Fukuda et al 2000, and dehydrogenase (Choudhury & Srivastava 2001, Vega-López et al 2007), which would be involved in the DOM rem- ineralisation process. Considering that Zn concentrations >5 μg Zn l -1 have been reported in some coastal environments (Reddy et al 2005, Cuong et al 2008, Zn potentially alters coastal carbon cycling.…”

Section: Effect Of Zn On the Remineralisation Of Natural Dommentioning

confidence: 99%

“…One important issue would be the consideration of metal speciation, because a part of the organic matter in seawater has a capacity to bind metal ions ( , while 20 to 30% of the total Zn had a free form in coastal environments (Galceran et al 2007), showing a more complex state of metal speciation in coastal environments. Considering these findings, it is important to investigate the effect of speciation on the dynamics of organic matter in the coastal environment.Another issue is to calculate the impact based on the effect of Zn alone, even though some coastal environments are subjected to inflows of various kinds of chemical, such as heavy metals and organic contaminants originating from both anthropogenic and natural sources (Hoshika & Shiozawa 1986, Reddy et al 2005, Cuong et al 2008. Considering that other kinds of chemical would also have significant effects on bacterial metabolites (e.g.…”

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Inhibitory effect of zinc on the remineralisation of dissolved organic matter in the coastal environment

Wada

2011

Aquat. Microb. Ecol.

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-1 ), DOM concentrations at the end of the experimental period (Day 14) increased 2.4 to 6.9%, and turnover time prolonged with a timescale of weeks to months. These potential shifts induced by Zn suggest that the allochthonous input of Zn into the coastal environment leads to suppression of energy flow in the microbial loop and enhances transport of DOM from coastal to offshore areas. KEY WORDS: Zinc · Zn · DOM · Remineralisation · Bacterial abundance Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 63: [47][48][49][50][51][52][53][54][55][56][57][58][59] 2011 higher concentrations of pollutants have been detected in coastal areas (Reddy et al. 2005, Cuong et al. 2008, Siddique et al. 2009) when compared to oceanic regions (Ellwood & Van den Berg 2000, Fukuda et al. 2000. Because some of the chemicals can alter biological activities (e.g. Pinto et al. 2003, Pereira et al. 2009), numerous researchers have focused on the toxic effects of such chemicals on organisms, including humans (e.g. Dell'Anno et al. 2003, Bielmyer et al. 2006, Thompson & Bannigan 2008, Mishra 2009). Based on their toxicity, it is recommended that the environmental concentrations of some chemicals be restricted to low levels (Bielmyer et al. 2006).Because zinc (Zn) is one of the heavy metals regarded as being less toxic to human health unless the concentration is abnormally high (Walsh et al. 1994), its concentration is loosely regulated (Water Quality Standards: 10 to 86 μg Zn l -1 ) (Chongprasith et al. 1999, Nagpal 1999, FDEP 2005, National Institute of Technology and Evaluation in Japan 2008), allowing considerable emissions of Zn from anthropogenic sources. In addition, much of the runoff of Zn occurs not only from human activity but also derives from natural environments (Hoshika & Shiozawa 1986). These findings indicate concentrations of Zn that are several orders of magnitude higher in many coastal environments when compared to other toxic heavy metals such as cadmium, copper and lead (Shitashima & Tsubota 1990, Reddy et al. 2005, Cuong et al. 2008).As mentioned above, Zn (compared with other heavy metals) is regarded as being a relatively less toxic element for humans and higher organisms, but it exerts a strong inhibitory effect on bacterial activity (Paulsson et al. 2000). Most studies on the effect of Zn on bacteria have been carried out in freshwater environments (Nweke et al. 2006, Vega-López et al. 2007; the results have shown a strong suppression of bacterial growth at low concentrations (> 0.1 μg Zn l -1 ), which is about an order of magnitude lower than the effective level on phytoplankton (Paulsson et al. 2000). Although there have been just a few studies on the effects of Zn on marine bacterial communities (Ku$pilić et al. 1989, Caroppo et al. 2006, RochelleNewall et al. 2008, these studies, too, have suggested that the activity of marine bacteria is also inhibited by the addition of Zn at 1 to 100 μg Zn l -1 . However, the impact on marine bacteria might be a little weak ...

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Section: Effect Of Zn On the Remineralisation Of Natural Dommentioning

confidence: 76%

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Section: Effect Of Zn On the Remineralisation Of Natural Dommentioning

confidence: 99%

mentioning

confidence: 99%

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Inhibitory effect of zinc on the remineralisation of dissolved organic matter in the coastal environment

Wada

2011

Aquat. Microb. Ecol.

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Chitosan and Trimethyl Chitosan (TMC) as Drug Absorption Enhancers

Benediktsdóttir

2020

Encyclopedia of Marine Biotechnology

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Biological responses of a simulated marine food chain to lead addition

Soto-Jiménez

Arellano-Fiore²,

Jara-Marini

et al. 2011

Enviro Toxic and Chemistry

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This investigation sought to assess the biological responses to Pb along a simplified four-level food chain, from the primary producer, the microalgae Tetraselmis suecica, grown in a control medium with < 1 µg/L of Pb and exposed to a sublethal dose (20 µg/L of Pb) and used as the base of a simulated food chain, through the primary-, secondary-, and tertiary-level consumers, namely, the brine shrimp, Artemia franciscana; the white-leg shrimp, Litopenaeus vannamei; and the grunt fish, Haemulon scudderi, respectively. Growth of Pb-exposed T. suecica was 40% lower than that of the control cultures, and survival of A. franciscana fed this diet was 25 to 30% lower than the control. No differences in the growth rates of Pb-exposed and control shrimp and fish and no gross morphological changes were evident in the exposed specimens. However, the exposed shrimp and fish had 20 and 15% higher mortalities than their controls, respectively. In addition, behavioral alterations were observed in exposed shrimp and fish, including reduction in food consumption or cessation of feeding, breathing air out of the water, reduction of motility, and erratic swimming. The negative correlation between Pb concentration in whole body of shrimp and fish and Fulton's condition factor suggested also that the exposed organisms were stressed because of Pb accumulation.

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Distribution of heavy metals in the dissolved and suspended phase of the sea-surface microlayer, seawater column and in sediments of Singapore’s coastal environment

Cited by 58 publications

References 56 publications

Inhibitory effect of zinc on the remineralisation of dissolved organic matter in the coastal environment

Inhibitory effect of zinc on the remineralisation of dissolved organic matter in the coastal environment

Chitosan and Trimethyl Chitosan (TMC) as Drug Absorption Enhancers

Biological responses of a simulated marine food chain to lead addition

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