title: Spatial distributions of δ13C, δ15N and C/N ratios in suspended particulate organic matter of a bay under serious anthropogenic influences: Daya Bay, China.
abstract: Stable isotopic signatures (δ13C and δ15N) and C/N ratios of suspended particulate organic matter (POM) were investigated from the surface water of Daya Bay during summer and winter of 2015. The relatively high δ13CPOMvalues suggested the input of13C-depleted terrigenous organic matter was low in Daya Bay. There were significant correlations between δ13CPOMvalues and chlorophyll a concentrations both during summer and winter, suggesting the δ13CPOMvalues were mainly controlled by the phytoplankton biomass in the surface water. The distribution of δ15NPOMvalues was more complicated than that of δ13CPOMand displayed low values in the outer bay and the Dan'ao River estuary.15N-depleted ammonia originating from industrial wastewater might have strongly influenced the water quality and stable isotopic signatures of POM near the Dan'ao River estuary. The δ13CPOMand δ15NPOMvalues strongly reflect the influences of anthropogenic activity and eutrophication in Daya Bay.
authors: Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, PR China; Guangdong Provincial Key Laboratory of Applied Marine Biology, West Xin'gang Road 164(#), Guangzhou 510301, PR China.
authors: Zhixin
authors: Z
authors: Ke
authors: Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, PR China. Electronic address: tanyh@scsio.ac.cn.
authors: Yehui
authors: Y
authors: Tan
authors: Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, PR China.
authors: Liangmin
authors: L
authors: Huang
authors: Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, PR China.
authors: Chunyu
authors: C
authors: Zhao
authors: Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, PR China.
authors: Xin
authors: X
authors: Jiang
mesh_terms: D061006:Bays / Q000737:chemistry*; D002681:China; D002734:Chlorophyll / Q000032:analysis*; D004784:Environmental Monitoring; D063366:Estuaries; D005068:Eutrophication; D052638:Particulate Matter; D010839:Phytoplankton; D045483:Rivers; D012621:Seasons; D014873:Water Pollutants / Q000032:analysis*; D060753:Water Quality
chemical_list: D052638:Particulate Matter; D014873:Water Pollutants; D002734:Chlorophyll
keywords: Anthropogenic activity; Daya Bay; Eutrophication; Particulate organic matter; Stable isotope