Hypoxia in the Bohai Bay, China: distributions, causes and mechanisms
نویسندگان
چکیده
The Haihe River system is a major conduit of land-based pollution into the Bohai Sea in North China, This study presented first-ever observation hypoxia estuary, providing valuable insights complex interplay between physical and biochemical factors influencing estuarine systems. research found seasonal variations DO distribution estuaries Yongdingxin Rivers. Hypoxia emerged summer at bottom estuary dissipated autumn, with minimum concentration 1.85 mg/L recorded HH-2 station. Within hypoxic zone, average was 4.02 mg/L, saturation less than 0.4. also identified primary drivers as combination factors, water stratification due to hydrodynamic limiting exchange reoxygenation different layers. In addition, decomposition organic matter consumed significant amount dissolved oxygen.The significantly higher autumn compared suggested possible existence estuary. contribute better understanding that influence hypoxia. findings have important implications for management remediation other
منابع مشابه
Detection and quantification of enteroviruses in coastal seawaters from Bohai Bay, Tianjin, China.
An 8-month survey was conducted to detect and quantify enteroviruses in Tianjin coastal seawaters of Bohai Bay to assess coastal water quality. Ten water samples were collected from Bohai Bay for the detection and quantification of enteroviruses by conventional reverse transcription polymerase chain reaction (RT-PCR) and SYBR Green real-time quantitative RT-PCR (qRT-PCR). Total viral nucleic ac...
متن کاملN2O Emissions from an Apple Orchard in the Coastal Area of Bohai Bay, China
Using static chambers and gas chromatography, nitrous oxide (N2O) fluxes from an apple orchard soil in the Bohai Bay region of China were measured from February 2010 to February 2011. In this study, two nitrogen (N) fertilizer treatments were designed--without (CK) or with (SN) synthetic N fertilizers (800 kg N ha(-1)). The annual cumulative N2O emissions from CK and SN were 34.6 ± 3.0 (mean ± ...
متن کاملImposex effects on the veined rapa whelk (Rapana venosa) in Bohai Bay, China.
Environmentally relevant concentrations of organotin compounds (OTs) may trigger sex changes in marine invertebrates and pose a threat to the marine ecosystem. In this study, we investigated organotin levels and the biological responses of wild veined rapa whelk (Rapana venosa) from Lüjuhe district (LJH), Dashentang district (DST), and Nanpaihe district (NPH) in Bohai Bay, China. We found that ...
متن کاملTrophodynamics of polybrominated diphenyl ethers in the marine food web of Bohai Bay, North China.
Polybrominated diphenyl ethers (PBDEs) are of great environmental concern due to the exponential increase of the concentrations in the environment, especially in high trophic level organisms, and the trophodynamics of these chemicals in aquatic food webs is an important criterion for assessing their ecological risk. This study analyzed 13 PBDEs in the zooplankton, five invertebrate species, six...
متن کاملHeavy Metals Pollution and Pb Isotopic Signatures in Surface Sediments Collected from Bohai Bay, North China
To investigate the characteristics and potential sources of heavy metals pollution, surface sediments collected from Bohai Bay, North China, were analyzed for the selected metals (Cd, Cr, Cu, Ni, Pb, and Zn). The Geoaccumulation Index was used to assess the level of heavy metal pollution. Pb isotopic compositions in sediments were also measured to effectively identify the potential Pb sources. ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Frontiers in Marine Science
سال: 2023
ISSN: ['2296-7745']
DOI: https://doi.org/10.3389/fmars.2023.1199340