【摘要】：于2015年1—12月對杭州灣北部沿岸碧海金沙圍隔海域水環(huán)境質(zhì)量進(jìn)行每月一次的跟蹤監(jiān)測,進(jìn)行圍隔海域水質(zhì)分析評價,通過調(diào)查底棲滸苔群落的種類組成及其生物量,評估其對圍隔海域水質(zhì)的修復(fù)能力。根據(jù)富營養(yǎng)化狀態(tài)指數(shù)(E)表明,2015年該圍隔海域1—9月份屬于高富營養(yǎng)化狀態(tài),10—12月份屬于富營養(yǎng)化狀態(tài),其中溶解無機(jī)氮(DIN)全年平均為(0.91±0.11)mg/L,屬劣Ⅳ類海水水質(zhì)標(biāo)準(zhǔn);溶解無機(jī)磷(DIP)全年平均為(0.031±0.005)mg/L,屬Ⅲ類海水水質(zhì)標(biāo)準(zhǔn);根據(jù)有機(jī)污染指數(shù)(A)顯示,2015年該圍隔海域2—7月份開始受到有機(jī)污染,8月、9月和12月屬于輕度有機(jī)污染,10月和11月屬于中度有機(jī)污染。底棲滸苔類的優(yōu)勢種為曲滸苔(Ulva flexuosa),占底棲藻場總生物量的97.3%。2015年3月至12月碧海金沙圍隔海域底棲曲滸苔全年總生物量凈增長量為1 497.3 t,實(shí)驗(yàn)測得曲滸苔組織內(nèi)總氮(TN)和總磷(TP)平均含量分別為3.50%±0.02%和0.13%±0.01%(干重),全年吸收水體中氮和磷量分別為(4 354.90±46.78)kg和(161.75±1.74)kg。分析表明,碧海金沙圍隔海域天然曲滸苔種群通過同化養(yǎng)殖水體中氮磷,具備一定的水質(zhì)修復(fù)能力,但尚未平衡由水產(chǎn)養(yǎng)殖活動造成的營養(yǎng)負(fù)荷。因此,在近岸海水養(yǎng)殖海域,除需進(jìn)行底棲海藻場的構(gòu)建外,還需要調(diào)整養(yǎng)殖結(jié)構(gòu),如增加大型海藻栽培以建立多營養(yǎng)層次的綜合養(yǎng)殖模式(IMTA),實(shí)現(xiàn)近岸海水養(yǎng)殖產(chǎn)業(yè)的可持續(xù)發(fā)展。
[Abstract]:From January to December 2015, the water environmental quality of the Bihai Jinsha enclosed sea area along the northern coast of Hangzhou Bay was monitored monthly, and the water quality of the enclosed sea area was analyzed and evaluated. The species composition and biomass of benthic Enteromorpha enteromorpha community were investigated. To evaluate its ability to repair the water quality of the enclosed sea area. According to the eutrophication state index (E), the enclosed sea area belongs to the high eutrophication state from January to September in 2015. The dissolved inorganic nitrogen (DIN) belongs to the water quality standard of class 鈪，

本文編號：2230614