"Development of toxicity tests for evaluating the sensitivity of
「"Development of toxicity tests for evaluating the sensitivity of」於資料集「EPQSummary_EnvironmentalMonitoringAndTesting」由單位「行政院環境保護署」的陳先生所提供，聯繫電話是02-2311-7722#2386，最近更新時間為：2023-07-30 01:01:45。 欄位Project Title的內容是"Development of toxicity tests for evaluating the sensitivity of biota to estuarine sediments (1/2)" ， 欄位Project Subject的內容是"Chemical contaminants discharged into estuaries and coastal areas often attach to sediment particles and are deposited on the sea bed. These contaminant-laden sediments may pose potential threats to coastal ecosystems, the sustainability of aquatic resources, and human health (via the food chain). In this project, we tried to develop two estuarine sediment toxicity tests from a selection of three species: two sediment-dwelling amphipods (Leptocheirus plumulosus and Ptilohyale plumicornis) and a bivalve mollusk (Meretrix lusoria). In the first screening, salinity tolerances of those species were compared in order to determine which ones could be appropriate test organisms for the estuarine environment. The effects of reference toxicants, two trace metals (copper and cadmium), and one organic toxicant, sodium dodecyl sulfate (SDS), were studied on selected organisms cultured in the laboratory. Confounding factors in the estuarine environment (e.g., sediment grain size, feeding demand, salinity tolerance, organism size, and organic matter content) that could contribute to toxicity in two of the test organisms were determined from optimal test survival conditions. Appropriate species must be selected for the purpose of developing standardized estuarine sediment toxicity tests for use in future estuarine sediment dredging, remediation, and cost-benefit assessment of the ecological environment.
Local species Ptilohyale plumicornis was collected from the southern estuary and confirmed and the hard clam Meretrix lusoria and an internationally common amphipod species, Leptocheirus plumulosus, were reared in the lab. Test lengths (shell length) of Ptilohyale plumicornis, Leptocheirus plumulosus, and Meretrix lusoria are recommended at 2.5-4.5 mm, 2-4 mm, and about 2 cm as well as salinities of 19, 20, and 22‰, respectively, in toxicity tests. Ptilohyale plumicornis acute (96 h) LC50 values in increasing order were 2.00±0.12 mg/L for Cd, 2.35±0.20 mg/L for Cu, and 7.99±1.55 mg/Lmg/L for SDS. Leptocheirus plumulosus acute (96 h) LC50 values in increasing order were 2.58±0.51 mg/L for Cd, 3.26±0.59 mg/L for Cu, and 5.00±1.78mg/L for SDS. Meretrix lusoria 96-h LC50 values for copper, cadmium, and SDS were 0.09±0.03, 0.96±0.26, and 10.95±2.77 mg/L, respectively. Local amphipod Ptilohyale plumicornis is suitable for sandy sediment toxicity tests based on a previous confounding-factors investigation, and its body size and salinity levels used in our sediment toxicity tests are consistent with other aquatic toxicity tests as were the 25 oC water temperature and a feeding frequency of three times per week. Using Meretrix lusoria as the biomonitoring species for developing standardized estuarine sediment toxicity tests, culture conditions recommended are 22‰ salinity, 25 oC water temperature, no feeding during the 10-d exposure period, sandy sediments, and 2-3 cm shell length.
" ， 欄位Project Year的內容是2016 ， 欄位Organizer的內容是"Environmental Analysis Laboratory" ， 欄位Executive Unit的內容是"國立屏東科技大學" ， 欄位Reporting download URL的內容是https://epq.epa.gov.tw/project/filedownload.aspx?fid=128173 ， 欄位Publish Date的內容是20170201 。
Project Title
"Development of toxicity tests for evaluating the sensitivity of biota to estuarine sediments (1/2)"
Project Subject
"Chemical contaminants discharged into estuaries and coastal areas often attach to sediment particles and are deposited on the sea bed. These contaminant-laden sediments may pose potential threats to coastal ecosystems, the sustainability of aquatic resources, and human health (via the food chain). In this project, we tried to develop two estuarine sediment toxicity tests from a selection of three species: two sediment-dwelling amphipods (Leptocheirus plumulosus and Ptilohyale plumicornis) and a bivalve mollusk (Meretrix lusoria). In the first screening, salinity tolerances of those species were compared in order to determine which ones could be appropriate test organisms for the estuarine environment. The effects of reference toxicants, two trace metals (copper and cadmium), and one organic toxicant, sodium dodecyl sulfate (SDS), were studied on selected organisms cultured in the laboratory. Confounding factors in the estuarine environment (e.g., sediment grain size, feeding demand, salinity tolerance, organism size, and organic matter content) that could contribute to toxicity in two of the test organisms were determined from optimal test survival conditions. Appropriate species must be selected for the purpose of developing standardized estuarine sediment toxicity tests for use in future estuarine sediment dredging, remediation, and cost-benefit assessment of the ecological environment. Local species Ptilohyale plumicornis was collected from the southern estuary and confirmed and the hard clam Meretrix lusoria and an internationally common amphipod species, Leptocheirus plumulosus, were reared in the lab. Test lengths (shell length) of Ptilohyale plumicornis, Leptocheirus plumulosus, and Meretrix lusoria are recommended at 2.5-4.5 mm, 2-4 mm, and about 2 cm as well as salinities of 19, 20, and 22‰, respectively, in toxicity tests. Ptilohyale plumicornis acute (96 h) LC50 values in increasing order were 2.00±0.12 mg/L for Cd, 2.35±0.20 mg/L for Cu, and 7.99±1.55 mg/Lmg/L for SDS. Leptocheirus plumulosus acute (96 h) LC50 values in increasing order were 2.58±0.51 mg/L for Cd, 3.26±0.59 mg/L for Cu, and 5.00±1.78mg/L for SDS. Meretrix lusoria 96-h LC50 values for copper, cadmium, and SDS were 0.09±0.03, 0.96±0.26, and 10.95±2.77 mg/L, respectively. Local amphipod Ptilohyale plumicornis is suitable for sandy sediment toxicity tests based on a previous confounding-factors investigation, and its body size and salinity levels used in our sediment toxicity tests are consistent with other aquatic toxicity tests as were the 25 oC water temperature and a feeding frequency of three times per week. Using Meretrix lusoria as the biomonitoring species for developing standardized estuarine sediment toxicity tests, culture conditions recommended are 22‰ salinity, 25 oC water temperature, no feeding during the 10-d exposure period, sandy sediments, and 2-3 cm shell length. "
Project Year
2016
Organizer
"Environmental Analysis Laboratory"
Executive Unit
"國立屏東科技大學"
Reporting download URL
Publish Date
20170201
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