Uptake rates of dissolved inorganic carbon and nitrogen by under-ice phytoplankton in the Canada Basin in summer 2005

Increasing concentrations of surface-seawater carbon dioxide (CO2) (ocean acidification) could favour seaweed species that currently are limited for dissolved inorganic carbon (DIC). Among them, those that are unable to use CO2-concentrating mechanisms (CCMs) to actively uptake bicarbonate (HCO3–) across the plasmalemma are most likely to benefit. Here, we assess how the DIC uptake and photosynthetic rates of three rhodophytes without CCMs respond to four seawater CO2 concentrations representing pre-industrial (280μatm), present-day (400μatm), representative concentration pathway (RCP) emissions scenario 8.52050 (650μatm) and RCP 8.52100 (1000μatm). We demonstrated that the photosynthetic rates of only one species increase between the preindustrial and end-of-century scenarios, but because of differing photosynthetic quotients (DIC taken up relative to O2 evolved), all three increase their DIC uptake rates from pre-industrial or present-day scenarios to the end-of-century scenario. These variable, but generally beneficial, responses highlight that not all species without CCMs will respond to ocean acidification uniformly. This supports past assessments that, on average, this group will likely benefit from the impacts of ocean acidification. However, more concerted efforts are now required to assess whether similar benefits to photosynthetic rates and DIC uptake are also observed in chlorophytes and ochrophytes without CCMs.

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Biogeochemical generation of dissolved inorganic carbon and nitrogen in the North Branch of inner Changjiang Estuary in a dry season

Estuarine Coastal and Shelf Science ◽

10.1016/j.ecss.2017.08.027 ◽

2017 ◽

Vol 197 ◽

pp. 136-149 ◽

Cited By ~ 8

Author(s):

Wei-Dong Zhai ◽

Xiu-Li Yan ◽

Di Qi

Keyword(s):

Inorganic Carbon ◽

Dissolved Inorganic Carbon ◽

Dry Season ◽

Changjiang Estuary ◽

Carbon And Nitrogen ◽

The North

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Coral Productivity Is Co-Limited by Bicarbonate and Ammonium Availability

Microorganisms ◽

10.3390/microorganisms8050640 ◽

2020 ◽

Vol 8 (5) ◽

pp. 640 ◽

Cited By ~ 2

Author(s):

Stephane Roberty ◽

Eric Béraud ◽

Renaud Grover ◽

Christine Ferrier-Pagès

Keyword(s):

Inorganic Carbon ◽

Dissolved Inorganic Carbon ◽

Physiological State ◽

Stylophora Pistillata ◽

Carbon Availability ◽

Carbon And Nitrogen ◽

Positive Effects ◽

Coral Holobiont ◽

Photosynthetic Performances ◽

The Impact

The nitrogen environment and nitrogen status of reef-building coral endosymbionts is one of the important factors determining the optimal assimilation of phototrophic carbon and hence the growth of the holobiont. However, the impact of inorganic nutrient availability on the photosynthesis and physiological state of the coral holobiont is partly understood. This study aimed to determine if photosynthesis of the endosymbionts associated with the coral Stylophora pistillata and the overall growth of the holobiont were limited by the availability of dissolved inorganic carbon and nitrogen in seawater. For this purpose, colonies were incubated in absence or presence of 4 µM ammonium and/or 6 mM bicarbonate. Photosynthetic performances, pigments content, endosymbionts density and growth rate of the coral colonies were monitored for 3 weeks. Positive effects were observed on coral physiology with the supplementation of one or the other nutrient, but the most important changes were observed when both nutrients were provided. The increased availability of DIC and NH4+ significantly improved the photosynthetic efficiency and capacity of endosymbionts, in turn enhancing the host calcification rate. Overall, these results suggest that in hospite symbionts are co-limited by nitrogen and carbon availability for an optimal photosynthesis.

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Nordic Seas total dissolved inorganic carbon data in CARINA

Earth System Science Data ◽

10.5194/essd-1-35-2009 ◽

2009 ◽

Vol 1 (1) ◽

pp. 35-43 ◽

Cited By ~ 12

Author(s):

A. Olsen

Keyword(s):

Quality Control ◽

Southern Ocean ◽

Inorganic Carbon ◽

Dissolved Inorganic Carbon ◽

The Arctic ◽

Nordic Seas ◽

Uptake Rates ◽

Systematic Biases ◽

Total Dissolved Inorganic Carbon ◽

Oceanic Carbon

Abstract. Water column data of carbon and carbon relevant hydrographic and hydrochemical parameters from 188 previously non-publicly available cruises in the Arctic, Atlantic, and Southern Ocean have been retrieved and merged into a new database: CARINA (CARbon IN the Atlantic). The data have been subject to rigorous quality control (QC) in order to ensure highest possible quality and consistency. The data for most of the parameters included were examined in order to quantify systematic biases in the reported values, i.e. secondary quality control. Significant biases have been corrected for in the data products, i.e. the three merged files with measured, calculated and interpolated values for each of the three CARINA regions; the Arctic Mediterranean Seas (AMS), the Atlantic (ATL) and the Southern Ocean (SO). With the adjustments the CARINA database is consistent both internally as well as with GLODAP (Key et al., 2004) and is suitable for accurate assessments of, for example, oceanic carbon inventories and uptake rates and for model validation. The Arctic Mediterranean Seas includes the Arctic Ocean and the Nordic Seas, and the quality control was carried out separately in these two areas. This contribution presents an account of the quality control of the total dissolved inorganic carbon (TCO2) data from the Nordic Seas in CARINA. Out of the 35 cruises from the Nordic Seas included in CARINA, 25 had TCO2 data. The data from 7 of these were found to be of low quality and should not be used, thus the final CARINA data product contains TCO2 data from 18 cruises from the Nordic Seas. These data appear consistent to at least 4 μmol kg−1.

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Seasonal Inorganic Carbon and Nitrogen Transport by Phytoplankton in an Arctic Lake

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f86-147 ◽

1986 ◽

Vol 43 (6) ◽

pp. 1177-1186 ◽

Cited By ~ 20

Author(s):

S. C. Whalen ◽

V. Alexander

Keyword(s):

Inorganic Carbon ◽

Dissolved Inorganic Carbon ◽

Euphotic Zone ◽

Ammonium Transport ◽

Carbon And Nitrogen ◽

Growing Seasons ◽

Relative Preference ◽

Total Data ◽

Ambient Concentrations ◽

Pattern Variable

Euphotic zone profiles of dissolved inorganic carbon [Formula: see text] and nitrogen [Formula: see text] transport were taken from Toolik Lake, Alaska, at approximately 10-d intervals through 100-d growing seasons in 1980 and 1981. Rates of DIC transport ranged from <0.2 to 7.8 μmol∙L−1∙d−1, with the maximum always at 0–1 m. Nitrate and ammonium transport rates ranged from <0.1 to 3 and 0.4 to 8 nmol∙L−1∙d−1, with the vertical pattern variable. For the 1980 and 1981 investigative periods, DIC transport was 622 and 504 mmol∙m−2 (7.5 and 6.0 g C∙m−2), making Toolik one of the most oligotrophic lakes on record. DIN transport for the respective years was 34 and 41 mmol∙m−2, giving molar C/N transport ratios of 18 and 12. For both years,[Formula: see text] was <20% of total DIN transport. Half-saturation constants for [Formula: see text] and [Formula: see text] transport were similar, averaging [Formula: see text] 0.11 ± 0.08 and 0.15 ± 0.13 μmol∙L−1. During the ice-free period, mean turnover times were also comparable at 6.3 ± 8.2 [Formula: see text] and 2.6 ± 1.2 d [Formula: see text], while relative preference indices for both nutrients were often near 1.0, indicating transport equitable with availability. The total data show a population well adapted to utilize consistently low ambient concentrations of [Formula: see text] and [Formula: see text] (0.05–0.20 μmol∙L−1) in the ice-free season, but incapable of exploiting elevated (2–3 μmol∙L−1) under-ice levels of [Formula: see text].

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Anthropogenic CO2accumulation and uptake rates in the Pacific Ocean based on changes in the13C/12C of dissolved inorganic carbon

Global Biogeochemical Cycles ◽

10.1002/2016gb005460 ◽

2017 ◽

Vol 31 (1) ◽

pp. 59-80 ◽

Cited By ~ 8

Author(s):

P. Quay ◽

R. Sonnerup ◽

D. Munro ◽

C. Sweeney

Keyword(s):

Pacific Ocean ◽

Inorganic Carbon ◽

Dissolved Inorganic Carbon ◽

The Pacific ◽

Uptake Rates ◽

The Pacific Ocean

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Bicarbonate uptake rates and diversity of RuBisCO genes in saline lake sediments

FEMS Microbiology Ecology ◽

10.1093/femsec/fiab037 ◽

2021 ◽

Vol 97 (4) ◽

Author(s):

Beichen Wang ◽

Jianrong Huang ◽

Jian Yang ◽

Hongchen Jiang ◽

Haiyi Xiao ◽

...

Keyword(s):

Inorganic Carbon ◽

Carbon Fixation ◽

Dissolved Inorganic Carbon ◽

Full Range ◽

Microbial Populations ◽

Fixation Rate ◽

Organic Carbon Concentration ◽

Uptake Rates ◽

Bicarbonate Uptake ◽

And Function

ABSTRACT There is limited knowledge of microbial carbon fixation rate, and carbon-fixing microbial abundance and diversity in saline lakes. In this study, the inorganic carbon uptake rates and carbon-fixing microbial populations were investigated in the surface sediments of lakes with a full range of salinity from freshwater to salt saturation. The results showed that in the studied lakes light-dependent bicarbonate uptake contributed substantially (>70%) to total bicarbonate uptake, while the contribution of dark bicarbonate uptake (1.35–25.17%) cannot be ignored. The light-dependent bicarbonate uptake rates were significantly correlated with pH and turbidity, while dark bicarbonate uptake rates were significantly influenced by dissolved inorganic carbon, pH, temperature and salinity. Carbon-fixing microbial populations using the Calvin-Benson-Bassham pathway were widespread in the studied lakes, and they were dominated by the cbbL and cbbM gene types affiliated with Cyanobacteria and Proteobacteria, respectively. The cbbL and cbbM gene abundance and population structures were significantly affected by different environmental variables, with the cbbL and cbbM genes being negatively correlated with salinity and organic carbon concentration, respectively. In summary, this study improves our knowledge of the abundance, diversity and function of carbon-fixing microbial populations in the lakes with a full range of salinity.

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