Remote sensing detected mariculture changes in Dongshan Bay

doi:10.3969/j.issn.1001-909X.2014.04.005

Abstract

Abstract: 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 is 5.6 times 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.

Key words: remote sensing, mariculture, macroalgae, nutrients, Dongshan Bay

CLC Number:

GAO Liang-ming, LI Yan, ZHONG Shuo-liang, LUO Dong-lian. Remote sensing detected mariculture changes in Dongshan Bay[J]. Journal of Marine Sciences, 2014, 32(4): 35-42.

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