Hydrological and biological regimes of lakes of East Antarctica
Hydrological and biological regimes of different types of lakes of oases of East Antarctica, Thala Hills, Schirmacher Oasis and Larsemann Hills, were studied in the summer of 2010–2011. In lakes covered with ice, inverse temperature stratification is recorded. In the bottom layers of the water, the...
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Cherepovets State University
2020
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fttriple:oai:gotriple.eu:oai:doaj.org/article:bcad227589694c769515471a5dbc1808 2023-05-15T13:43:47+02:00 Hydrological and biological regimes of lakes of East Antarctica Andrei N. Sharov Alekxei V. Tolstikov 2020-09-01 https://doi.org/10.23859/estr-200318 https://doaj.org/article/bcad227589694c769515471a5dbc1808 en ru eng rus Cherepovets State University doi:10.23859/estr-200318 2619-094X 2619-0931 https://doaj.org/article/bcad227589694c769515471a5dbc1808 undefined Трансформация экосистем, Vol 3, Iss 3, Pp 3-11 (2020) antarctic lakes bottom communities phytoplankton chlorophyll climate change geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.23859/estr-200318 2023-01-22T19:26:17Z Hydrological and biological regimes of different types of lakes of oases of East Antarctica, Thala Hills, Schirmacher Oasis and Larsemann Hills, were studied in the summer of 2010–2011. In lakes covered with ice, inverse temperature stratification is recorded. In the bottom layers of the water, the temperature (about 4 °C) is close to the values characteristic of water with a maximum density. Isothermy is observed on the opened small lakes, and water in some reservoirs warms up to 8 °С. Benthic communities of cyanobacteria and invertebrates are the main biological component of lakes, where there is no classical food chain and a microbial loop prevails. Studies have shown that a 3-meter layer of ice permits a sufficient amount of light even to a depth of 30 m. Light does not limit the development of algae and cyanobacteria. However, the low content of nutrients in the water limits the growth of phytoplankton, causing low values of biomass (less than 0.01 mg/l) and concentration of chlorophyll a (0.1–0.45 μg/l). A tendency to climate change around the Schirmacher oasis is recorded. In recent decades, some lakes, which in the middle of the last century were constantly covered with ice, began to open in the summer months. In the period when the lake is covered with ice, homothermy is established with a water temperature of 4 °C. After having opened, the water temperature in the lake drops to 0.5–1 °С because of wind-wave cooling. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Unknown Antarctic East Antarctica Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) Thala Hills ENVELOPE(46.000,46.000,-67.667,-67.667) Ecosystem Transformation 3 3 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English Russian |
topic |
antarctic lakes bottom communities phytoplankton chlorophyll climate change geo envir |
spellingShingle |
antarctic lakes bottom communities phytoplankton chlorophyll climate change geo envir Andrei N. Sharov Alekxei V. Tolstikov Hydrological and biological regimes of lakes of East Antarctica |
topic_facet |
antarctic lakes bottom communities phytoplankton chlorophyll climate change geo envir |
description |
Hydrological and biological regimes of different types of lakes of oases of East Antarctica, Thala Hills, Schirmacher Oasis and Larsemann Hills, were studied in the summer of 2010–2011. In lakes covered with ice, inverse temperature stratification is recorded. In the bottom layers of the water, the temperature (about 4 °C) is close to the values characteristic of water with a maximum density. Isothermy is observed on the opened small lakes, and water in some reservoirs warms up to 8 °С. Benthic communities of cyanobacteria and invertebrates are the main biological component of lakes, where there is no classical food chain and a microbial loop prevails. Studies have shown that a 3-meter layer of ice permits a sufficient amount of light even to a depth of 30 m. Light does not limit the development of algae and cyanobacteria. However, the low content of nutrients in the water limits the growth of phytoplankton, causing low values of biomass (less than 0.01 mg/l) and concentration of chlorophyll a (0.1–0.45 μg/l). A tendency to climate change around the Schirmacher oasis is recorded. In recent decades, some lakes, which in the middle of the last century were constantly covered with ice, began to open in the summer months. In the period when the lake is covered with ice, homothermy is established with a water temperature of 4 °C. After having opened, the water temperature in the lake drops to 0.5–1 °С because of wind-wave cooling. |
format |
Article in Journal/Newspaper |
author |
Andrei N. Sharov Alekxei V. Tolstikov |
author_facet |
Andrei N. Sharov Alekxei V. Tolstikov |
author_sort |
Andrei N. Sharov |
title |
Hydrological and biological regimes of lakes of East Antarctica |
title_short |
Hydrological and biological regimes of lakes of East Antarctica |
title_full |
Hydrological and biological regimes of lakes of East Antarctica |
title_fullStr |
Hydrological and biological regimes of lakes of East Antarctica |
title_full_unstemmed |
Hydrological and biological regimes of lakes of East Antarctica |
title_sort |
hydrological and biological regimes of lakes of east antarctica |
publisher |
Cherepovets State University |
publishDate |
2020 |
url |
https://doi.org/10.23859/estr-200318 https://doaj.org/article/bcad227589694c769515471a5dbc1808 |
long_lat |
ENVELOPE(76.217,76.217,-69.400,-69.400) ENVELOPE(46.000,46.000,-67.667,-67.667) |
geographic |
Antarctic East Antarctica Larsemann Hills Thala Hills |
geographic_facet |
Antarctic East Antarctica Larsemann Hills Thala Hills |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
Трансформация экосистем, Vol 3, Iss 3, Pp 3-11 (2020) |
op_relation |
doi:10.23859/estr-200318 2619-094X 2619-0931 https://doaj.org/article/bcad227589694c769515471a5dbc1808 |
op_rights |
undefined |
op_doi |
https://doi.org/10.23859/estr-200318 |
container_title |
Ecosystem Transformation |
container_volume |
3 |
container_issue |
3 |
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1766193180936503296 |