scholarly journals Parvularcula flava sp. nov., an alphaproteobacterium isolated from surface seawater of the South China Sea

2016 ◽  
Vol 66 (9) ◽  
pp. 3498-3502 ◽  
Author(s):  
Xin-Qi Zhang ◽  
Yue-Hong Wu ◽  
Xiang Zhou ◽  
Xin Zhang ◽  
Xue-Wei Xu ◽  
...  
2017 ◽  
Vol 67 (7) ◽  
pp. 2459-2464 ◽  
Author(s):  
Dan-Dan Li ◽  
Yan-Qi Zhang ◽  
Ming Peng ◽  
Ning Wang ◽  
Xiu-Juan Wang ◽  
...  

Radiocarbon ◽  
2018 ◽  
Vol 61 (2) ◽  
pp. 461-472 ◽  
Author(s):  
Pan Gao ◽  
Liping Zhou ◽  
Kexin Liu ◽  
Xiaomei Xu

ABSTRACTRadiocarbon (14C) generated by the thermonuclear tests in the late 1950s to early 1960s has been used as a tracer to study atmospheric and oceanic circulations, carbon exchange between different reservoirs, and fossil fuel emissions. Here we report the first measurements of 14C in atmospheric CO2 of maritime air collected over the South China Sea (SCS) during July 2014. We also present 14C of the dissolved inorganic carbon (DIC) in the sea surface water in the same region. Most of the Δ14C values of the atmospheric CO2 vary in the range of 15.6±1.6‰– 22.0±1.6‰, indicating that the central SCS maritime air is well-mixed and consistent with the clean background air in the Northern Hemisphere. The 14C values of the DIC (DI14C) in the surface seawater vary between 28.3±2.5‰ and 40.6±2.7‰, mainly due to the lateral mixing between the SCS and western Pacific. The average surface seawater DI14C is 15.4 ± 5.1‰ higher than that of the maritime air 14CO2. The reversal of the sea–air Δ14C gradient occurred at ∼2000, marking the start of the upper ocean transferring bomb 14C back to the atmosphere in the SCS.


2015 ◽  
Vol 107 (5) ◽  
pp. 1189-1196 ◽  
Author(s):  
Xiupian Liu ◽  
Qiliang Lai ◽  
Yaping Du ◽  
Guangyu Li ◽  
Fengqin Sun ◽  
...  

2015 ◽  
Vol 108 (3) ◽  
pp. 801-801 ◽  
Author(s):  
Xiupian Liu ◽  
Qiliang Lai ◽  
Yaping Du ◽  
Guangyu Li ◽  
Fengqin Sun ◽  
...  

2022 ◽  
Author(s):  
Guang Gao ◽  
Tifeng Wang ◽  
Jiazhen Sun ◽  
Xin Zhao ◽  
Lifang Wang ◽  
...  

Abstract. Future CO2-induced ocean acidification (OA) has been documented to either inhibit or enhance or result in no effect on marine primary productivity (PP). In order to examine effects of OA under multiple drivers, we investigated the influences of OA (a decrease of 0.4 pHtotal units with corresponding CO2 concentrations ranged 22.0–39.7 µM) on PP through deck-incubation experiments at 101 stations in the Taiwan Strait and the South China Sea (SCS), including the coastal zone, the continental shelf and slope, as well as deep-water basin. The daily net primary productivities in surface seawater under incident solar radiation ranged from 17–306 µg C (µg Chl a)−1 d−1, with the responses of PP to OA being region-dependent and the OA-induced changes varying from −88.03 % (inhibition) to 56.87 % (enhancement). The OA-treatment stimulated PP in surface waters of coastal, estuarine and shelf waters, but suppressed it in the South China Sea basin. Such OA-induced changes in PP were significantly related to NOX (the sum of NO3− and NO2−) availability, in situ pH and solar radiation in surface seawater, but negatively related to salinity changes. Our results indicate that phytoplankton cells are more vulnerable to pH drop in oligotrophic waters. Considering high nutrient and low salinity in coastal waters and reduced nutrient availability in pelagic zones with the progressive stratification associated with ocean warming, our results imply that future OA will enhance PP in coastal waters but decrease it in pelagic oligotrophic zones.


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