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- Title
Chlorophyll a in suspended particulate matter of the Caspian Sea as an indicator of biogenic sedimentation conditions.
- Authors
Kravchishina, M.; Klyuvitkin, A.; Pautova, L.; Politova, N.; Lein, A.; Lisitzin, A.
- Abstract
The conditions of biogenic sedimentation (concentration of chlorophyll a (chl a), particulate organic carbon (POC), and its isotope composition (δС)), as well as the quantitative characteristics of phytoplankton, and the total concentration of suspended particulate matter have been studied in the Caspian Sea in May and June 2012. The vertical (from the surface layer to bottom) distribution and precipitation of the biogenic component of suspended particulate matter have been determined. It was found that only 5% of the particulate matter and around 3% of POC reached the Middle Caspian after passing through a marginal filter (Volga River delta-Northern Caspian). The subsurface chl a maximum layer (around 20-60 m) with a cold-water phytoplankton community was revealed in the Middle and Southern Caspian. The subsurface region of accumulation of chl a and phytoplankton in the subthermocline layer has been extended from the southern periphery of the Derbent Depression to the Absheron Sill.
- Subjects
CHLOROPHYLL; PARTICULATE matter; SEDIMENTATION &; deposition; METEOROLOGICAL precipitation; PHYTOPLANKTON
- Publication
Doklady Earth Sciences, 2015, Vol 465, Issue 1, p1200
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X15110173