Carbon and nitrogen isotopic ratios of suspended particulate organic matter (SPOM) in the Black Sea water column

2006 ◽  
Vol 53 (17-19) ◽  
pp. 1875-1892 ◽  
Author(s):  
Yeşim Çoban-Yıldız ◽  
Mark A. Altabet ◽  
Ayşen Yılmaz ◽  
Süleyman Tuğrul
Keyword(s):  
Organic Matter ◽  
Water Column ◽  
Black Sea ◽  
Particulate Organic Matter ◽  
Sea Water ◽  
The Black Sea ◽  
Isotopic Ratios ◽  
Carbon And Nitrogen ◽  
Suspended Particulate ◽  
Suspended Particulate Organic Matter

Analytical pyrolysis of suspended particulate organic matter from the Black Sea water column

2006 ◽  
Vol 53 (17-19) ◽  
pp. 1856-1874 ◽  
Author(s):  
Yeşim Çoban-Yıldız ◽  
Daniele Fabbri ◽  
Valentina Baravelli ◽  
Ivano Vassura ◽  
Ayşen Yılmaz ◽  
...  
Keyword(s):  
Organic Matter ◽  
Water Column ◽  
Black Sea ◽  
Particulate Organic Matter ◽  
Sea Water ◽  
The Black Sea ◽  
Analytical Pyrolysis ◽  
Suspended Particulate ◽  
Suspended Particulate Organic Matter

scholarly journals Stable C and N Isotope Composition of Suspended Particulate Organic Matter in the Neva Estuary: The Role of Abiotic Factors, Productivity, and Phytoplankton Taxonomic Composition

2020 ◽  
Vol 8 (12) ◽  
pp. 959 ◽  
Author(s):  
Mikhail S. Golubkov ◽  
Vera N. Nikulina ◽  
Alexei V. Tiunov ◽  
Sergey M. Golubkov
Keyword(s):  
Organic Matter ◽  
Particulate Organic Matter ◽  
Abiotic Factors ◽  
Taxonomic Composition ◽  
Isotopic Ratios ◽  
Abiotic Factor ◽  
Δ13c And Δ15n ◽  
Neva Estuary ◽  
Suspended Particulate ◽  
Suspended Particulate Organic Matter

Knowledge of carbon and nitrogen isotopic ratios in organic matter and their changes is important when studying nutrient cycles in aquatic ecosystems. Relationships between δ13C and δ15N values of suspended particulate organic matter (POM), water temperature, salinity, pH, redox potential, chlorophyll a concentration, primary production, and biomasses of different taxonomic groups of phytoplankton in the Neva Estuary were statistically analyzed. We tested the hypothesis that the studied physicochemical and biogeochemical characteristics, as well as the species composition of phytoplankton and its productivity, can be significant predictors of changes in the isotopic ratios of suspended particulate organic matter in estuaries. In the Neva Estuary, δ13CPOM (−16.8–−27.6‰) and δ15NPOM (2.3–7.3‰) changed synchronously. Statistical analysis showed that for both isotopes, the photosynthetic activity and taxonomic composition of phytoplankton are important. For 13CPOM, the second most important factor was water salinity, which was apparently associated with the transition of algae from CO2 to HCO3 consumption during photosynthesis in estuarine waters. For 15NPOM changes, the most important abiotic factor was pH. The study showed that the dependences of POM isotopic ratios on environmental variables obtained for continental and oceanic waters are also valid in transitional zones such as the Neva Estuary.

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