Fate of fenthion in salt-marsh environments: I. Factors affecting biotic and abiotic degradation rates in water and sediment

1989 ◽  
Vol 8 (9) ◽  
pp. 747-758 ◽  
Author(s):  
C. R. Cripe ◽  
E. J. O'Neil ◽  
M. E. Woods ◽  
W. T. Gilliam ◽  
P. H. Pritchard
Keyword(s):  
Salt Marsh ◽  
Factors Affecting ◽  
Abiotic Degradation ◽  
Water And Sediment ◽  
Degradation Rates

Biotic and abiotic degradation rates of methyl parathion in freshwater and estuarine water and sediment samples

Chemosphere ◽  
1987 ◽  
Vol 16 (7) ◽  
pp. 1509-1520 ◽  
Author(s):  
P.H. Pritchard ◽  
C.R. Cripe ◽  
W.W. Walker ◽  
J.C. Spain ◽  
A.W. Bourquin
Keyword(s):  
Methyl Parathion ◽  
Estuarine Water ◽  
Sediment Samples ◽  
Abiotic Degradation ◽  
Water And Sediment ◽  
Degradation Rates ◽  
Water And Sediment Samples

scholarly journals Abiotic degradation rates for carbon tetrachloride and chloroform: Final report.

2012 ◽  
Author(s):  
James E. Amonette ◽  
Peter M. Jeffers ◽  
Odeta Qafoku ◽  
Colleen K. Russell ◽  
Daniel R. Humphrys ◽  
...  
Keyword(s):  
Carbon Tetrachloride ◽  
Final Report ◽  
Abiotic Degradation ◽  
Degradation Rates

scholarly journals Abiotic Degradation Rates for Carbon Tetrachloride: and Chloroform: Progress in FY 2008

2008 ◽  
Author(s):  
James E. Amonette ◽  
Peter M. Jeffers ◽  
Odeta Qafoku ◽  
Colleen K. Russell ◽  
Thomas W. Wietsma ◽  
...  
Keyword(s):  
Carbon Tetrachloride ◽  
Abiotic Degradation ◽  
Degradation Rates

Quantifying Shedding and Degradation Rates of Environmental DNA (eDNA) from Pacific Crown-of-thorns Seastar (Acanthaster cf. Solaris)

2021 ◽  
Author(s):  
Sarah Lok Ting Kwong ◽  
Cecilia Villacorta-Rath ◽  
Jason Doyle ◽  
Sven Uthicke
Keyword(s):  
Degradation Rate ◽  
Abiotic Factors ◽  
Feeding Activity ◽  
Environmental Dna ◽  
Aquatic Environments ◽  
Early Life Stages ◽  
Factors Affecting ◽  
Degradation Rates ◽  
Population Outbreaks ◽  
Two Temperatures

Abstract Population outbreaks of the corallivorous crown-of-thorns seastar (CoTS; Acanthaster spp.) are significant threats to the Indo-Pacific reefs. Although recent research demonstrated that environmental DNA (eDNA) techniques could improve CoTS monitoring and management, the interpretation of surveillance results has been limited by uncertainties about eDNA dynamics in aquatic environments. Here, we aimed to identify biotic and abiotic factors affecting the shedding and degradation rates of CoTS eDNA. Using laboratory-raised 8-month-old juvenile CoTS, aquarium experiments were conducted to test the effect of two temperatures (24 and 28°C) and three feeding treatments (no food, food available and food inaccessible) on eDNA shedding rate. Additionally, CoTS eDNA degradation rate was quantified under three temperatures (24, 26 and 28°C). We found that eDNA shedding rate was affected by feeding treatment (p < 0.0001) but not temperature. Specifically, the shedding rate under food accessible treatment was about 7 times higher than that of food inaccessible treatment (p < 0.0001), whereas the presence of coral reduced the shedding rate by half (food inaccessible vs no food, p = 0.0249). Degradation of CoTS eDNA was rapid (half-life = 14h) and not affected by temperature. Our results demonstrated that feeding activity increased eDNA release, but some of the released DNA was lost potentially due to binding to coral surface mucus layer or skeleton. The rapid degradation rate indicated that results of eDNA surveillance likely reflects recent and local occurrence of CoTS. Although further testing is needed, this study provided support for using eDNA as a novel detection tool for early life stages of CoTS on coral reefs.

scholarly journals Environmental factors affecting larval fish community in the salt marsh area of Guadiana estuary (Algarve, Portugal)

2015 ◽  
Vol 79 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Renata Gonçalves ◽  
Ana Dulce Correia ◽  
Natasa Atanasova ◽  
Maria Alexandra Teodósio ◽  
Radhouan Ben-Hamadou ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Environmental Factors ◽  
Fish Community ◽  
Larval Fish ◽  
Factors Affecting ◽  
Marsh Area ◽  
Salt Marsh Area ◽  
Guadiana Estuary

scholarly journals Contamination Of Perfluorinated Compounds In Sediment of The Cau River, Vietnam

2021 ◽  
Author(s):  
Hoai Tran ◽  
Dieu-Anh Van ◽  
Duc Thao Vu ◽  
Trung Hai Huynh
Keyword(s):  
Environmental Pollutants ◽  
Clay Content ◽  
Organic Carbon Content ◽  
Environmental Matrices ◽  
Sediment Distribution ◽  
Factors Affecting ◽  
Water And Sediment ◽  
Kd Values ◽  
Pfoa Concentration ◽  
Total Concentrations

Abstract Perfluorooctane sulfonate (PFOS) and Perfluorooctanoic acid (PFOA) are recognized as emerging environmental pollutants because of their high persistence in various environmental matrices and toxic effects on humans and animals. In Vietnam, PFOA and PFOS have been detected in surface water and sediment in recent studies. The objectives of this study were to evaluate the occurrence of PFOS and PFOA in the sediment of the Cau river, Thai Nguyen city to determine the partition coefficient between water and sediment, and to elucidate the environmental factors affecting the sorption of PFOS and PFOA to sediment. The concentration of PFOS and PFOA in surface sediment ranged from 1.19 ng/g to 4.73 ng/g and 0.17 ng/g to 1.78 ng/g, respectively, with the highest concentrations, are recorded in the areas that receiving wastewater from domestic and industrial activities. Depending on the depth, the total concentrations of PFOS and PFOA ranged from 8.41 to 19.25 ng/g and tended to decrease with increasing sediment depth. The concentrations in the surface sediments are lower than the second layer, indicating a downward trend in the use and consumption of these compounds in recent years. The water-sediment distribution coefficient (Kd) is relatively different for PFOS and PFOA, with log Kd values ranged from 1.31–1.86 and 0.08–1.31 for PFOS and PFOA, respectively. This study also confirms that the total organic carbon content is the physiochemical property that significantly affected the adsorption to sediments of PFOS and PFOA. No apparent relation was found between PFOS, PFOA concentration in sediment and clay content nor sediment particle size.

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