Foraminifera‐derived carbon contribution to sedimentary inorganic carbon pool: A case study from three Norwegian fjords

Geobiology ◽  
2021 ◽  
Author(s):  
Natalia Szymańska ◽  
Magdalena Łącka ◽  
Katarzyna Koziorowska‐Makuch ◽  
Karol Kuliński ◽  
Joanna Pawłowska ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Carbon Pool ◽  
Carbon Contribution

Carbon storage in cotton soils of northern New South Wales

Soil Research ◽  
2003 ◽  
Vol 41 (5) ◽  
pp. 889 ◽  
Author(s):  
T. A. Knowles ◽  
B. Singh
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Content ◽  
Soil Carbon ◽  
Inorganic Carbon ◽  
Carbon Pool ◽  
Total Carbon ◽  
Soil Types ◽  
Soil Carbon Pool ◽  
Total Soil

Soil carbon is an important component of the global carbon cycle with an estimated pool of soil organic carbon of about 1500 Gt. There are few estimates of the pool of inorganic carbon, but it is thought to be approximately 50% of the organic carbon pool. There is no detailed study on the estimation of the soil carbon pool for Australian soils.In order to quantify the carbon pools and to determine the extent of spatial variability in the organic and inorganic carbon pools, 120 soil cores were taken down to a depth of 0.90 m from a typical cotton field in northern NSW. Three cores were also taken from nearby virgin bushland and these samples were used as paired samples. Each soil core was separated into 4 samples, i.e. 0–0.15, 0.15–0.30, 0.30–0.60, and 0.60–0.90 m. Soil organic carbon was determined by wet oxidation and inorganic carbon content was determined using the difference between total carbon and organic carbon, and confirmed by the acid dissolution method. Total carbon was measured using a LECO CHN analyser. Soil organic carbon of the field constituted 62% (0–0.15 m), 58% (0.15–0.30 m), 60% (0.30–0.60 m), and 67% (0.60–0.90 m) of the total soil carbon. The proportion of inorganic carbon in total carbon is higher than the global average of 32%. Organic carbon content was relatively higher in the deeper layers (>0.30�m) of the studied soils (Vertosols) compared with other soil types of Australia. The carbon content varied across the field, however, there was little correlation between the soil types (grey, red, or intergrade colour) and carbon content. The total soil carbon pool of the studied field was estimated to be about 78 t/ha for 0–0.90 m layer, which was approximately 58% of the total soil carbon in the soil under nearby remnant bushland (136 t/ha). The total pool of carbon in the cotton soils of NSW was estimated to be 44.8 Mt C, where organic carbon and inorganic carbon constitute 34.9 Mt C and 9.9 Mt C, respectively. Based on the results of a limited number of paired sites under remnant vegetation, it was estimated that about 18.9 Mt of C has been lost from Vertosols by cotton cropping in NSW. With more sustainable management practices such as conservation tillage and green manuring, some of the lost carbon can be resequestered, which will help to mitigate the greenhouse effect, improve soil quality and may increase crop yield.

scholarly journals Soil organic carbon potential of Bozhurishte municipality: A case study from western Bulgaria

2020 ◽  
Vol 11 (1) ◽  
pp. 23-36
Author(s):  
Borislav GRIGOROV
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Potential ◽  
Carbon Pool ◽  
Organic Carbon Pool ◽  
Economic Zone ◽  
Major Section ◽  
High Scenario ◽  
Large Soil

The current study focuses on the soil organic carbon contents in topsoil (0-30 cm) in Bozhurishte Municipality. The municipality is a part of Sofia Province and it represents a major section of the “Sofia-Bozhurishte Economic Zone”. The aim of the investigation is to reveal how soil organic carbon storages may change in the forthcoming 20 years during a medium and a high scenario. The results of the study display several major zones of a large soil organic carbon pool, located to the northeast and the central parts of the municipality. The section, containing the largest soil organic carbon pool, may experience an increase of 376 400 tons/ha for 20 years in the medium scenario and 499 100 tons/ha in the high scenario. The author concludes that promising results may be used as a basis for an expansion of the study in the neighboring municipalities.

The effects of afforestation on soil organic and inorganic carbon: A case study of the Loess Plateau of China

CATENA ◽  
2012 ◽  
Vol 95 ◽  
pp. 145-152 ◽  
Author(s):  
Ruiying Chang ◽  
Bojie Fu ◽  
Guohua Liu ◽  
Shuai Wang ◽  
Xueling Yao
Keyword(s):  
Loess Plateau ◽  
Inorganic Carbon ◽  
The Loess Plateau ◽  
Organic And Inorganic Carbon

δ pattern of dissolved inorganic carbon in a small granitic catchment: the Strengbach case study (Vosges mountains, France)

1999 ◽  
Vol 159 (1-4) ◽  
pp. 129-145 ◽  
Author(s):  
P. Amiotte-Suchet ◽  
D. Aubert ◽  
J.L. Probst ◽  
F. Gauthier-Lafaye ◽  
A. Probst ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Vosges Mountains

Effect of the intracellular inorganic carbon pool on chlorophyll a fluorescence quenching and O2 photoreduction in air-grown cells of the cyanobacterium Synechococcus UTEX 625

1997 ◽  
Vol 75 (6) ◽  
pp. 946-954 ◽  
Author(s):  
Qinglin Li ◽  
David Thomas Canvin
Keyword(s):  
Electron Transport ◽  
Fluorescence Quenching ◽  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Inorganic Carbon ◽  
Electron Flow ◽  
Close Correlation ◽  
Carbon Pool ◽  
Key Words Cyanobacteria ◽  
Highly Correlated

Simultaneous measurements were made of O2 exchange, inorganic carbon (Ci) accumulation and assimilation, and chlorophyll a fluorescence of the cyanobacterium Synechococcus UTEX 625. The addition of Ci to cells at the CO2 compensation point resulted in quenching of chlorophyll a fluorescence in the presence or absence of the CO2 fixation inhibitor, iodoacetamide. The magnitude of quenching was related to electron flow to terminal electron acceptors such as CO2 and O2. When photosynthetic CO2 fixation was allowed, the rate of electron transport, as expressed by (F*m – F)/F*m, was highly correlated with the onset of photosynthesis. When CO2 fixation was inhibited by the addition of iodoacetamide, the observed fluorescence quenching was consistent with the enhanced rate of O2 photoreduction that occurred when Ci was added. There was a close correlation (r = 0.98) between the magnitude of O2-dependent fluorescence quenching and the amount of O2 photoreduction. The degree of stimulation of electron flow to O2 photoreduction was dependent on the inorganic carbon concentration. The K1/2 (Ci) for extracellular Ci was 1.36 ± 0.13 μM (mean ± SD, n = 3) and K1/2 (Ci) for the intracellular Ci pool was 1.4 ± 0.18 mM (mean ± SD, n = 3). The reduction of N,N-dimethyl-p-nitrosoaniline was also stimulated by the addition of Ci, whereas the addition of Ci had no effect on the reduction of 2,6-dimethylbenzoquinone and ferricyanide. The results suggest that Ci stimulates electron flow in photosystem I. Key words: cyanobacteria, O2 photoreduction, fluorescence, Ci concentrating mechanism, inorganic carbon pool, linear electron transport, kinetic study.

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