运用lAndSAT卫星序列遥感数据的监督分类方法,识别与分析了东山湾网箱养殖和延绳式养殖两种海水养殖类型的时空变化。1999—2012年间东山湾海水养殖面积扩大了10倍,大型海藻养殖为主的延绳式养殖面积约为以鱼类与贝类养殖为主的网箱养殖面积的5.6倍。东山湾的养殖布局为适应海湾水质特点而逐年调整,网箱养殖区主要集中在水交换能力较强的湾口,延绳式养殖主要集中在营养盐高、水交换能力略弱的湾内。以大型海藻养殖为主的海水养殖大规模扩展,对海湾富营养化趋势起到缓解作用,但规模过大的海水养殖介入可能诱发主要表现在氮循环上的海湾生态系统不稳定。Using supervised classification method of Landsat satellite sequence remote sensing data,historical changes both cage and longline culture method types of aquaculture farming of Dongshan Bay were identified and analyzed.From 1999 to 2012,the mariculture area expanded ten times while the longline culture-based is5.6times the area of cages culture-based.Reasonable mariculture pattern were adjusted year and year to fit the water quality distribution within the bay.Cage culture zones of the bay were mainly concentrated in waters near tidal inlet with strong exchange capacity,while longline culture zones were mainly distributed in the area far away from the bay mouth where the water exchange capacity was a litter poor but nutrient was rich.Massive expansion of seaweed farming dominated aquaculture structure in the bay had played an important role in mitigation eutrophic tendency in bay.However as its nitrogen circulation revealed,excessive intervention process of mariculture may induce instability in the ecosystem.国家海洋公益性行业科研专项经费项目资助(201005012
