DOI: 10.1016/j.marpolbul.2017.09.061
Scopus记录号: 2-s2.0-85030458606
论文题名: Subsurface low dissolved oxygen occurred at fresh- and saline-water intersection of the Pearl River estuary during the summer period
作者: Li G. ; Liu J. ; Diao Z. ; Jiang X. ; Li J. ; Ke Z. ; Shen P. ; Ren L. ; Huang L. ; Tan Y.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2017
语种: 英语
英文关键词: Fresh- and saline-water intersection
; Heterotrophic bacteria
; Low dissolved oxygen
; Pearl River estuary
Scopus关键词: Bacteria
; Biochemical oxygen demand
; Dissolution
; Dissolved oxygen
; Estuaries
; Gems
; Oxygen
; Rivers
; Surface waters
; Water resources
; Chlorophyll-a concentration
; Freshwater inputs
; Heterotrophic bacterias
; Low dissolved oxygen
; Oxygen depletion
; Pearl River estuary
; Subsurface waters
; Vertical distributions
; Saline water
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要: Estuarine 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 (>5m) water, the DO level varied from 0.71 to 6.65mgL-1 and from 6.58 to 8.20mgL-1 in the summer and winter periods, respectively. Particularly, we observed an area of ~1500km2 low DO zone in the subsurface water with a threshold of 4mgDOL-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. © 2017 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/88067
Appears in Collections: 过去全球变化的重建 全球变化的国际研究计划
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作者单位: Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Recommended Citation:
Li G.,Liu J.,Diao Z.,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,2017-01-01