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Subsurface low dissolved oxygen occurred at fresh- and saline-water intersection of the Pearl River estuary during the summer period
Li, G; Liu, JX; Diao, ZH; Jiang, X; Li, JJ; Ke, ZX; Shen, PP; Ren, LJ; Huang, LM; Tan, YH; ligang@scsio.ac.cn; tanyh@scsio.ac.cn
2018
Source PublicationMARINE POLLUTION BULLETIN
Volume126Pages:585-591
AbstractEstuarine oxygen depletion is one of the worldwide problems, which is caused by the freshwater-input-derived severe stratification and high nutrients loading. In this study we presented the horizontal and vertical distributions of dissolved oxygen (DO) in the Pearl River estuary, together with temperature, salinity, chlorophyll a concentration and heterotrophic bacteria abundance obtained from two cruises during the summer (wet) and winter (dry) periods of 2015. In surface water, the DO level in the summer period was lower and varied greater, as compared to the winter period. The DO remained unsaturated in the summer period if salinity is < 12 and saturated if salinity is > 12; while in the winter period it remained saturated throughout the estuary. In subsurface ( > 5 m) water, the DO level varied from 0.71 to 6.65 mg L-1 and from 6.58 to 8.20 mg L-1 in the summer and winter periods, respectively. Particularly, we observed an area of similar to 1500 km(2) low DO zone in the subsurface water with a threshold of 4 mg DO L-1 during this summer period, that located at the fresh- and saline-water intersection where is characterized with severe stratification and high heterotrophic bacteria abundance. In addition, our results indicate that spatial DO variability in surface water was contributed differently by biological and physio-chemical variables in the summer and winter periods, respectively.
Department[Li, Gang; Tan, Yehui] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China; Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Guangzhou 510301, Guangdong, Peoples R China
Subject AreaEnvironmental Sciences & Ecology ; Marine & Freshwater Biology
WOS KeywordLow dissolved oxygen ; Heterotrophic bacteria ; Fresh- and saline-water intersection ; Pearl River estuary
Funding ProjectLMB
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17028
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding Authorligang@scsio.ac.cn; tanyh@scsio.ac.cn
Recommended Citation
GB/T 7714
Li, G,Liu, JX,Diao, ZH,et al. Subsurface low dissolved oxygen occurred at fresh- and saline-water intersection of the Pearl River estuary during the summer period[J]. MARINE POLLUTION BULLETIN,2018,126:585-591.
APA Li, G.,Liu, JX.,Diao, ZH.,Jiang, X.,Li, JJ.,...&tanyh@scsio.ac.cn.(2018).Subsurface low dissolved oxygen occurred at fresh- and saline-water intersection of the Pearl River estuary during the summer period.MARINE POLLUTION BULLETIN,126,585-591.
MLA Li, G,et al."Subsurface low dissolved oxygen occurred at fresh- and saline-water intersection of the Pearl River estuary during the summer period".MARINE POLLUTION BULLETIN 126(2018):585-591.
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