摘要
为进一步了解粤东海水网箱渔场硫化物污染特征,研究了大鹏澳网箱养殖海域底质硫化物的空间分布、季节变化和污染状况。结果表明,底质硫化物含量(mg·kg^(-1),干重)在网箱区内(为344～949,平均624)远高于网箱区外(为142～278,平均212),春夏季(平均694)显著高于秋冬季(平均554)(P<0.02)。研究海域底质硫化物含量与有机质含量正相关(r+0.704,P<0.05),其中夏季相关最显著(r=0.818,P<0.02)。硫化物平均污染指数1.57,老化风险级别为4级,说明沉积环境已达到重污染,已面临很大的老化风险。
In order to deeply know the sulfide pollution characteristics at sea water cage culture area in east Guangdong Province, the spatial distribution, seasonal change and pollution assessment of sulfide in the sediment at cage culture area of Dapengao Bay were studied. The result indicated that there were sulfide contents (mg·kg -1, dry weight ) from 344 to 949 with average of 624 inside the cage area, which were much higher than those from 142 to 278 with average of 212 outside the cage area. The sulfide content inside the cage area in autumn and winter was higher than that in spring and summer (P < 0.02), the mean value was 694 and554 respectively. The sulfide contents positively related to organic carbon percentage within the sediment (r = 0.704, P < 0.05 ), especially in summer (r = 0.818,P<0.02 ). The average pollution index was 1.57 and the risk grade of degradation was 4, indicating that the sediment of the cage culture area has seriously been contaminated and has already faced high degradation risk.
出处
《水产学报》
CAS
CSCD
北大核心
2003年第6期570-574,共5页
Journal of Fisheries of China
基金
科技部社会公益研究专项基金(2001-183)
国家"十五"计划攻关项目(2001BA505B0201)
中国水产科学研究院重点科研计划项目(2001-4-3)
