Water chemistry and pigment composition of 13 lakes and ponds in Maritime Antarctica
The Antarctic Peninsula has been rapidly warming, resulting in changes to the abundance and surface cover of terrestrial aquatic ecosystems, as well as their ecosystem structure and function. Therefore, comparative studies of aquatic ecosystems across large latitudinal gradients can be useful in bet...
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ftaperta:oai:aperta.ulakbim.gov.tr:270430 2024-06-23T07:46:14+00:00 Water chemistry and pigment composition of 13 lakes and ponds in Maritime Antarctica Ozkan, Korhan 2023-01-01 https://aperta.ulakbim.gov.tr/record/270430 unknown https://aperta.ulakbim.gov.tr/record/270430 oai:aperta.ulakbim.gov.tr:270430 info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by TURKISH JOURNAL OF EARTH SCIENCES 32(8) 11 info:eu-repo/semantics/article publication-article 2023 ftaperta 2024-06-12T23:31:53Z The Antarctic Peninsula has been rapidly warming, resulting in changes to the abundance and surface cover of terrestrial aquatic ecosystems, as well as their ecosystem structure and function. Therefore, comparative studies of aquatic ecosystems across large latitudinal gradients can be useful in better understanding these changes and making more reliable predictions regarding the consequences of climate change. During Turkish Antarctic Expeditions in 2018 and 2019, samples were collected from 10 lakes and 3 ponds across Maritime Antarctica (north-western coasts of the Antarctic Peninsula). These lakes and ponds were located on Ardley, Robert, Livingstone, Galindez, and Horseshoe islands, covering a latitudinal gradient of over 800 km. Snapshot samplings were conducted of the water chemistry, including nutrient, major ion, and trace metal concentrations, as well as pigment compositions representing the primary productivity and plankton community composition. These lakes and ponds had large variations in nutrient concentrations (0.8-771 mu g/L PO4 and 30-886 mu g/L total dissolved inorganic N) and conductivity (30-735 mu S), representing a trophic status ranging from ultra-oligotrophic to a few eutrophic sites (for example a pond near penguin colonies). The total productivity, measured as the chlorophyll-a (Chl-a) level, was generally low (0.02-3.2 mu g/L) in the lakes, reflecting their oligotrophic characteristics. However, the composition of pigments in the water column showed significant variation across the lakes. Both the patterns in the total Chl-a concentrations and pigment compositions reflected the patterns in conductivity and nutrient gradients across the lakes. Overall, the observed patterns suggested a predominant role of nutrient transport from the sea in driving the chemical composition and primary productivity of Antarctic lakes, mediated by the distance to the sea, as well as the activities of seals and penguin colonies. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Aperta - Türkiye Açık Arşiv Antarctic Antarctic Peninsula Ardley ENVELOPE(-58.953,-58.953,-62.201,-62.201) Galindez ENVELOPE(-64.248,-64.248,-65.250,-65.250) Horseshoe Islands ENVELOPE(-80.491,-80.491,51.308,51.308) Livingstone ENVELOPE(-134.337,-134.337,61.333,61.333) The Antarctic |
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Open Polar |
collection |
Aperta - Türkiye Açık Arşiv |
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ftaperta |
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unknown |
description |
The Antarctic Peninsula has been rapidly warming, resulting in changes to the abundance and surface cover of terrestrial aquatic ecosystems, as well as their ecosystem structure and function. Therefore, comparative studies of aquatic ecosystems across large latitudinal gradients can be useful in better understanding these changes and making more reliable predictions regarding the consequences of climate change. During Turkish Antarctic Expeditions in 2018 and 2019, samples were collected from 10 lakes and 3 ponds across Maritime Antarctica (north-western coasts of the Antarctic Peninsula). These lakes and ponds were located on Ardley, Robert, Livingstone, Galindez, and Horseshoe islands, covering a latitudinal gradient of over 800 km. Snapshot samplings were conducted of the water chemistry, including nutrient, major ion, and trace metal concentrations, as well as pigment compositions representing the primary productivity and plankton community composition. These lakes and ponds had large variations in nutrient concentrations (0.8-771 mu g/L PO4 and 30-886 mu g/L total dissolved inorganic N) and conductivity (30-735 mu S), representing a trophic status ranging from ultra-oligotrophic to a few eutrophic sites (for example a pond near penguin colonies). The total productivity, measured as the chlorophyll-a (Chl-a) level, was generally low (0.02-3.2 mu g/L) in the lakes, reflecting their oligotrophic characteristics. However, the composition of pigments in the water column showed significant variation across the lakes. Both the patterns in the total Chl-a concentrations and pigment compositions reflected the patterns in conductivity and nutrient gradients across the lakes. Overall, the observed patterns suggested a predominant role of nutrient transport from the sea in driving the chemical composition and primary productivity of Antarctic lakes, mediated by the distance to the sea, as well as the activities of seals and penguin colonies. |
format |
Article in Journal/Newspaper |
author |
Ozkan, Korhan |
spellingShingle |
Ozkan, Korhan Water chemistry and pigment composition of 13 lakes and ponds in Maritime Antarctica |
author_facet |
Ozkan, Korhan |
author_sort |
Ozkan, Korhan |
title |
Water chemistry and pigment composition of 13 lakes and ponds in Maritime Antarctica |
title_short |
Water chemistry and pigment composition of 13 lakes and ponds in Maritime Antarctica |
title_full |
Water chemistry and pigment composition of 13 lakes and ponds in Maritime Antarctica |
title_fullStr |
Water chemistry and pigment composition of 13 lakes and ponds in Maritime Antarctica |
title_full_unstemmed |
Water chemistry and pigment composition of 13 lakes and ponds in Maritime Antarctica |
title_sort |
water chemistry and pigment composition of 13 lakes and ponds in maritime antarctica |
publishDate |
2023 |
url |
https://aperta.ulakbim.gov.tr/record/270430 |
long_lat |
ENVELOPE(-58.953,-58.953,-62.201,-62.201) ENVELOPE(-64.248,-64.248,-65.250,-65.250) ENVELOPE(-80.491,-80.491,51.308,51.308) ENVELOPE(-134.337,-134.337,61.333,61.333) |
geographic |
Antarctic Antarctic Peninsula Ardley Galindez Horseshoe Islands Livingstone The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Ardley Galindez Horseshoe Islands Livingstone The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
TURKISH JOURNAL OF EARTH SCIENCES 32(8) 11 |
op_relation |
https://aperta.ulakbim.gov.tr/record/270430 oai:aperta.ulakbim.gov.tr:270430 |
op_rights |
info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by |
_version_ |
1802644739834511360 |