行政院環境保護署 環保專案成果報告查詢系統

108

1,760 千元

2019/02/21

2019/12/31

謝季吟

環檢所

李秋萍

國立屏東科技大學

環境監測及檢測

端足類、搖蚊、TRIAD、底泥品質指標

Amphipods, Chironomid, TRIAD, Sediment Quality Guidelines

王一匡

謝季吟

08-7703202#7507

chiying@mail.npust.edu.tw

本計畫建置搖蚊(Chironomus riparius)底泥生物慢毒性檢測技術，與已公告之端足蟲(Hyalella azteca) 急慢毒性試驗終點(存活及成長)進行比較，並同時藉由TRIAD 評估程序，整合化學方法(銅、鋅、鉻、鎘、鉛、鎳、砷、汞、鐵及錳)、生物毒性(搖蚊及端足蟲)和生態(豐度指標、歧異度指標及Hilsonhoff 科級生物指數等) 三大面向探討大安溪(DA1~DA3)及二仁溪(SYR, SY1及SY2)流域底泥污染現況及風險評估。 本計畫搖蚊慢毒性建置結果顯示，使用OECD配方底泥於試驗期間每周換水三次之存活率可符合OECD建議之底泥控制組存活率需達≧70%的規範。兩次調查(108年3月及7~8月)結果顯示二仁溪流域底泥樣品重金屬有高達22.5%測值超過指標上限值，污染程度高於大安溪流域。生物毒性試驗結果顯示，兩樣站(DA1及DA3)底泥不具端足蟲急慢毒性試驗存活率效應，樣站DA2不具急毒性存活率效應，但慢毒性試驗存活率及成長效應均與控制組具有顯著差異。二仁溪流域樣站急慢毒性試驗終點之存活及成長效應均與控制組具有顯著差異；搖蚊暴露SY1樣站之急毒性試驗終點頭殼寬與慢毒性試驗終點羽化率均與控制組相較下具有顯著抑制 (p<0.05)。兩次生態調查結果顯示，大安溪流域共調查到4科8種魚類及13目17科底棲生物；二仁溪流域共調查到5科7種魚類及7目13科底棲生物。經生態評估指數計算結果顯示大安溪流域污染程度低於二仁溪流域。 底泥三大面向(化學、毒性和生態)進行整合權重數據之綜合評估結果顯示，大安溪流域(DA1~DA3)及二仁溪SYR樣站底泥品質被歸類為部分有毒化學物質構成環境壓力(因成長效應抑制)，但並無造成生物立即性存活風險，而二仁溪SY1及SY2樣站底泥品質則被歸類於具有嚴重且不利影響，意即其為具高度風險之樣站。

端足類、搖蚊、TRIAD、底泥品質指標

期末報告定稿本.pdf

12MB

期末報告(定稿本)

2020/2/1 上午 12:00:00

Chironomus riparius sediment chronic toxicity testing was developed based on the European Union's relevant sediment toxicity test protocol in current project. Acute (survival) and chronic (survival and growth) toxicity test endpoints were monitored and results compared to the standard method for Hyalella azteca toxicity testing. A TRIAD risk assessment procedure was carried out for the Da-an (DA1~DA3) and Erren River (SYR, SY1及SY2) Basins, which included chemical analysis (copper, zinc, chromium, cadmium, lead, nickel, arsenic, mercury, iron, and manganese), biological toxicity (Chironomidae and Amphipoda), and ecological investigation (abundance index, diversity index, and Hilsonhoff family biological index). Under a thrice-weekly water renewal exposure condition, we observed that C. riparius survival was ≧ 70%, which met the acceptability criteria for survival testing. Sediment and biota samples were collected in March and July through August, 2019. Sediment trace metal analysis showed that only nickel exceeded the sediment quality guideline low value (SQG low) in the Da-an River watershed, whereas trace metals in the Erren River watershed reached an SQG high of 22.5%. H. azteca survival and growth in acute and chronic toxicity tests conducted on Erren River watershed sediments were significantly different from the control group. Chironomidae toxicity testing showed that the head capsule width and emergence rate of C. riparius was significantly inhibited compared with the control group (p < 0.05) in acute and chronic toxicity test endpoints at site SY1. In the ecological survey, four families and eight species of fish and 13 orders and 17 families of benthic organisms are recorded from the Da-an River. Five families and seven species of fish and 7 orders and 13 families of benthic organisms are recorded from the Erren River. Our results show that the pollution level of the Da-an River is relatively slight. In our survey, the three-tiers valuation results from the integrated weight data for sediment quality (chemical, toxic, and ecological) showed that stations DA1, DA2, DA3, and SYR are chemical-toxic stressed (although resistance may have developed at the community level), and there were significant adverse effects and high risk from sediment contamination at stations SY1 and SY2.

Amphipods, Chironomid, TRIAD, Sediment Quality Guidelines