Distribution of Diuron in Coastal Seawater and Sediments from West Sea Area of Zhoushan Island

Xu, Hao; Lu, Ading; Yu, Hong‐Ren; Sun, Jingya; Shen, Ming

doi:10.4236/ojms.2013.33015

Cited by 16 publications

(6 citation statements)

References 12 publications

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“…This index aggregates scores given to four indicator concentrations (suspended solids, chlorophyll a , particulate nitrogen, particulate phosphorus), which are all part of the suspended material factor (factor MR2) identified by EFA in the present study. Diuron has a strong association with sediments ( Stork, Bennett & Bell, 2008 ; Balakrishnan, Takeda & Sakugawa, 2012 ; Xu et al, 2013 ) and is also included in this factor. Overall, this suggests that factor MR2 can be interpreted as the quality of the water.…”

Section: Resultsmentioning

confidence: 99%

Marine microbial communities of the Great Barrier Reef lagoon are influenced by riverine floodwaters and seasonal weather events

Angly

Heath

Morgan

et al. 2016

PeerJ

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The role of microorganisms in maintaining coral reef health is increasingly recognized. Riverine floodwater containing herbicides and excess nutrients from fertilizers compromises water quality in the inshore Great Barrier Reef (GBR), with unknown consequences for planktonic marine microbial communities and thus coral reefs. In this baseline study, inshore GBR microbial communities were monitored along a 124 km long transect between 2011 and 2013 using 16S rRNA gene amplicon sequencing. Members of the bacterial orders Rickettsiales (e.g., Pelagibacteraceae) and Synechococcales (e.g., Prochlorococcus), and of the archaeal class Marine Group II were prevalent in all samples, exhibiting a clear seasonal dynamics. Microbial communities near the Tully river mouth included a mixture of taxa from offshore marine sites and from the river system. The environmental parameters collected could be summarized into four groups, represented by salinity, rainfall, temperature and water quality, that drove the composition of microbial communities. During the wet season, lower salinity and a lower water quality index resulting from higher river discharge corresponded to increases in riverine taxa at sites near the river mouth. Particularly large, transient changes in microbial community structure were seen during the extreme wet season 2010–11, and may be partially attributed to the effects of wind and waves, which resuspend sediments and homogenize the water column in shallow near-shore regions. This work shows that anthropogenic floodwaters and other environmental parameters work in conjunction to drive the spatial distribution of microorganisms in the GBR lagoon, as well as their seasonal and daily dynamics.

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Section: Resultsmentioning

confidence: 99%

Marine microbial communities of the Great Barrier Reef lagoon are influenced by riverine floodwaters and seasonal weather events

Angly

Heath

Morgan

et al. 2016

PeerJ

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“…Giacomazzi and Cochet (2004) reported that diuron is a biologically active pollutant present and persistent in water and sediments. In a three-year study, Xu et al (2013) found that the annual average amount of diuron in seawater and sediments presented a slow-growing trend, indicating that diuron poses a potential risk to the aquatic ecosystems, like in our case, the estuary of the Jamapa River.…”

Section: Resultsmentioning

confidence: 53%

Acute toxicity of the herbicide karmex (diuron) in Macrobrachium acanthurus and M. olfersii prawns

Cházaro-Olvera¹,

Montoya-Mendoza²,

Castañeda-Chávez³

et al. 2022

Rev. Int. Contam. Ambie.

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Farmers have increased the production of food by using chemical substances such as diuron; however, these components affect the water quality and the species found in these ecosystems. Macrobrachium acanthurus and M. olfersii postlarvae present in the estuary of Río Jamapa, Veracruz were collected to measure the LC50 and LD50 using the herbicide Karmex (diuron: (3-(3,4-dichlorophenyl)-1,1-dimethylurea [DCMU]). The captures of the prawns were made with light traps. Acute toxicity bioassays were carried out at 96 h to determine the mean lethal concentration (LC50). In the experimental design, a geometric series was used considering the control and five concentrations of the herbicide (1.75, 3.5, 6.99, 14, and 28 mg/L). The data analysis was carried out with the Probit method. A maximum LC50 of 10.233 mg/L and LD50 of 8.221 mg/L of Karmex were obtained for M. acanthurus and a maximum LC50 of 9.242 mg/L and LD50 of 7.504 mg/L of Karmex were obtained for M. olfersii. The average lethal concentration was consistent with those of other crustaceans, such as Artemia salina and Daphnia. Based on the response in the bioassays, Macrobrachium acanthurus and M. olfersii postlarvae can be used in toxicology studies.

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“…This index aggregates scores given to four indicator concentrations (suspended solids, chlorophyll a, particulate nitrogen, particulate phosphorus), which are all part of the suspended material factor (factor MR2) identified by EFA in the present study. Diuron has a strong association with sediments (Stork, Bennett & Bell, 2008;Balakrishnan, Takeda & Sakugawa, 2012;Xu et al, 2013) and is also included in this factor. Overall, this suggests that factor MR2 can be interpreted as the quality of the water.…”

Section: Environmental Drivers Of Coastal Microbial Dynamicsmentioning

confidence: 99%

Peer Review #1 of "Marine microbial communities of the Great Barrier Reef lagoon are influenced by riverine floodwaters and seasonal weather events (v0.1)"

2016

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The role of microorganisms in maintaining coral reef health is increasingly recognized. Riverine floodwater containing herbicides and excess nutrients from fertilizers compromises water quality in the inshore Great Barrier Reef (GBR), with unknown consequences for planktonic marine microbial communities and thus coral reefs. In this baseline study, inshore GBR microbial communities were monitored along a 124 km long transect between 2011 and 2013 using 16S rRNA gene amplicon sequencing. Members of the bacterial orders Rickettsiales (e.g. Pelagibacteraceae) and Synechococcales (e.g. Prochlorococcus), and of the archaeal class Marine Group II were prevalent in all samples, exhibiting a clear seasonal dynamics. Microbial communities near the Tully river mouth included a mixture of taxa from offshore marine sites and from the river system. The environmental parameters collected could be summarized into four groups, represented by salinity, rainfall, temperature and water quality, that drove the composition of microbial communities. During the wet season, lower salinity and a lower water quality index resulting from higher river discharge corresponded to increases in riverine taxa at sites near the river mouth. Particularly large, transient changes in microbial community structure were seen during the extreme wet season 2010-11, and may be partially attributed to the effects of wind and waves, which resuspend sediments and homogenize the water column in shallow near-shore regions. This work shows that anthropogenic floodwaters and other environmental parameters work in conjunction to drive the spatial distribution of microorganisms in the GBR lagoon, as well as their seasonal and daily dynamics.

show abstract

Distribution of Diuron in Coastal Seawater and Sediments from West Sea Area of Zhoushan Island

Cited by 16 publications

References 12 publications

Marine microbial communities of the Great Barrier Reef lagoon are influenced by riverine floodwaters and seasonal weather events

Marine microbial communities of the Great Barrier Reef lagoon are influenced by riverine floodwaters and seasonal weather events

Acute toxicity of the herbicide karmex (diuron) in Macrobrachium acanthurus and M. olfersii prawns

Peer Review #1 of "Marine microbial communities of the Great Barrier Reef lagoon are influenced by riverine floodwaters and seasonal weather events (v0.1)"

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