Leading groups of benthos and parameters of bottom waters and bottom sediments in the Obskaya Guba and adjacent regions of the Kara Sea

Composition and distribution of macrobenthic communities in the Ob estuary (Obskaya Guba) and the adjacent Kara Sea shelf were studied during Cruise 54 of R/V Akademik Mstislav Keldysh. From the Ob River esruary to open parts of the sea gradual changes of bottom biocenoses included changes in leadin...

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Bibliographic Details
Main Authors: Galkin, Sergey V, Kucheruk, Nikita V, Minin, K V, Rayskiy, A K, Goroslavskaya, E I
Format: Dataset
Language:English
Published: PANGAEA 2010
Subjects:
Akademik Mstislav Keldysh
AMK54
AMK54-4994
AMK54-4995
AMK54-4996
AMK54-4999
AMK54-5000
AMK54-5002
AMK54-5003
AMK54-5004
Archive of Ocean Data
ARCOD
Kara Sea
MULT
Multiple investigations
Obskaya Guba
ob river
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.769657
https://doi.org/10.1594/PANGAEA.769657
Description
Summary:Composition and distribution of macrobenthic communities in the Ob estuary (Obskaya Guba) and the adjacent Kara Sea shelf were studied during Cruise 54 of R/V Akademik Mstislav Keldysh. From the Ob River esruary to open parts of the sea gradual changes of bottom biocenoses included changes in leading taxa. Along with increase in salinity freshwater and brackish water taxa were replaced by related forms adapted to dwelling in seawater. Comparison of original data with results of previous investigations revealed considerable spatial and temporal variations of bottom communities in the studied area. The main environmental factors determining fauna distribution in the estuarine zone are discussed. An extensive biocenosis dominated by Portlandia aestuariorum in the Ob estuary was found for the first time.

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