Benthos investigations in the Lena Delta

According to monitoring data gained between 1982-1992, macrobenthos in the Tiksi Bay is characterized by low indices of the total abundance, biomass and taxonomic diversity. 30 macrobenthic species have been recorded in the Tiksi Bay. The bottom biocenoses within the estuarine-arctic water mass cons...

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Bibliographic Details
Main Author: Gukov, Aleksander Yu
Format: Dataset
Language:English
Published: PANGAEA 2002
Subjects:
briz_1
briz_2
briz_3
Laptev Sea System
Lena Delta
Siberia
Russia
LSS
Peterson grab
PETG
Professor Multanovskiy
St.1
St.2
St.3
Transdrift-II
Arctic
Laptev Sea
Tiksi
Stolb
laptev
lena delta
lena river
Polarforschung
Tiksi Bay
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.758018
https://doi.org/10.1594/PANGAEA.758018
Description
Summary:According to monitoring data gained between 1982-1992, macrobenthos in the Tiksi Bay is characterized by low indices of the total abundance, biomass and taxonomic diversity. 30 macrobenthic species have been recorded in the Tiksi Bay. The bottom biocenoses within the estuarine-arctic water mass consist of widespread eurybiontic boreal-arctic and brackish-water species. The maximal number of species was observed at a depth of 8.5 m. The maximum biomass was recorded on muddy grounds. The studied bottom fauna is characterized by a high population density (from 1160-600 ind/m**2) and low biomass of 15.5-22.4 g/m**2. The predominant benthic animals of the main Lena River channel 4.7 km upstream Stolb Island are Chironomidae, Plecoptera and Oligochaeta. In total, 48 species of macrobenthos were registered here. In spring the average density of macrozoobenthos in the channel is 680, in summer 770, in autumn 720 and in winter 380 ind/m**2, with the average biomass varying between 2.9 g/m**2 in spring, 7.06 in summer, 4.4 in autumn, and 2.6 in winter.

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