Impact of the ‘Little Ice Age’ climate cooling on the maar lake ecosystem affected by penguins: A lacustrine sediment record, Penguin Island, West Antarctica
A Pliocene-age volcano on Penguin Island became active again in the Pleistocene/Holocene, forming the main cone of the island – Deacon Peak, and leaving late-Holocene phreatomagmatic craters, including ‘Petrel Crater’, about 200 m in diameter and filled currently by a maar lake with a flat bottom at...
Published in: | The Holocene |
---|---|
Main Authors: | , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SAGE Publications
2017
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1177/0959683616683254 http://journals.sagepub.com/doi/pdf/10.1177/0959683616683254 http://journals.sagepub.com/doi/full-xml/10.1177/0959683616683254 |
id |
crsagepubl:10.1177/0959683616683254 |
---|---|
record_format |
openpolar |
spelling |
crsagepubl:10.1177/0959683616683254 2024-09-15T17:43:22+00:00 Impact of the ‘Little Ice Age’ climate cooling on the maar lake ecosystem affected by penguins: A lacustrine sediment record, Penguin Island, West Antarctica Wasiłowska, Agnieszka Tatur, Andrzej Pushina, Zinajda Barczuk, Andrzej Verkulich, Sergey National Science Centre, Poland 2017 http://dx.doi.org/10.1177/0959683616683254 http://journals.sagepub.com/doi/pdf/10.1177/0959683616683254 http://journals.sagepub.com/doi/full-xml/10.1177/0959683616683254 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 27, issue 8, page 1115-1131 ISSN 0959-6836 1477-0911 journal-article 2017 crsagepubl https://doi.org/10.1177/0959683616683254 2024-06-24T04:32:59Z A Pliocene-age volcano on Penguin Island became active again in the Pleistocene/Holocene, forming the main cone of the island – Deacon Peak, and leaving late-Holocene phreatomagmatic craters, including ‘Petrel Crater’, about 200 m in diameter and filled currently by a maar lake with a flat bottom at 18 m water depth. Petrographic, geochemical, photosynthetic pigment, and diatom data from the 72-cm-long sediment core reveal that the crater was initially a marine lagoon with typical phytoplankton assemblages. Most probably, tectonic–volcanic activity about 1250 years ago, documented in tephra fallout, triggered an abrupt glacio-isostatic uplift that separated the lake from the sea. The horizon of tephra, probably from the Deception Island volcano, marks a sudden change in environment from brackish to lacustrine. The ecological evolution of the lake was initially constrained by an uplift, whereas the influence of marine water vanished with time, the lake became meromictic, and the freshwater mixolimnion layer expanded, while the monimolimnion became anoxic due to the influence of a penguin rookery situated on the shore. During the ‘Little Ice Age’ (LIA), the maar may have been covered by permanent ice. A discharge of mineralized guano from the possibly enlarged penguin rookery on the lake shore caused an expansion of the anoxic monimolimnion to the ice surface and an important reduction of autochthonous lacustrine biota of the maar, whereas a substantially increased participation of allochthonous biota passively supplied with guano. That record in the lake sediment core reaffirms the occurrence of a regional LIA event in the maritime Antarctic. Article in Journal/Newspaper Antarc* Antarctic Antarctica Deception Island Penguin Island West Antarctica SAGE Publications The Holocene 27 8 1115 1131 |
institution |
Open Polar |
collection |
SAGE Publications |
op_collection_id |
crsagepubl |
language |
English |
description |
A Pliocene-age volcano on Penguin Island became active again in the Pleistocene/Holocene, forming the main cone of the island – Deacon Peak, and leaving late-Holocene phreatomagmatic craters, including ‘Petrel Crater’, about 200 m in diameter and filled currently by a maar lake with a flat bottom at 18 m water depth. Petrographic, geochemical, photosynthetic pigment, and diatom data from the 72-cm-long sediment core reveal that the crater was initially a marine lagoon with typical phytoplankton assemblages. Most probably, tectonic–volcanic activity about 1250 years ago, documented in tephra fallout, triggered an abrupt glacio-isostatic uplift that separated the lake from the sea. The horizon of tephra, probably from the Deception Island volcano, marks a sudden change in environment from brackish to lacustrine. The ecological evolution of the lake was initially constrained by an uplift, whereas the influence of marine water vanished with time, the lake became meromictic, and the freshwater mixolimnion layer expanded, while the monimolimnion became anoxic due to the influence of a penguin rookery situated on the shore. During the ‘Little Ice Age’ (LIA), the maar may have been covered by permanent ice. A discharge of mineralized guano from the possibly enlarged penguin rookery on the lake shore caused an expansion of the anoxic monimolimnion to the ice surface and an important reduction of autochthonous lacustrine biota of the maar, whereas a substantially increased participation of allochthonous biota passively supplied with guano. That record in the lake sediment core reaffirms the occurrence of a regional LIA event in the maritime Antarctic. |
author2 |
National Science Centre, Poland |
format |
Article in Journal/Newspaper |
author |
Wasiłowska, Agnieszka Tatur, Andrzej Pushina, Zinajda Barczuk, Andrzej Verkulich, Sergey |
spellingShingle |
Wasiłowska, Agnieszka Tatur, Andrzej Pushina, Zinajda Barczuk, Andrzej Verkulich, Sergey Impact of the ‘Little Ice Age’ climate cooling on the maar lake ecosystem affected by penguins: A lacustrine sediment record, Penguin Island, West Antarctica |
author_facet |
Wasiłowska, Agnieszka Tatur, Andrzej Pushina, Zinajda Barczuk, Andrzej Verkulich, Sergey |
author_sort |
Wasiłowska, Agnieszka |
title |
Impact of the ‘Little Ice Age’ climate cooling on the maar lake ecosystem affected by penguins: A lacustrine sediment record, Penguin Island, West Antarctica |
title_short |
Impact of the ‘Little Ice Age’ climate cooling on the maar lake ecosystem affected by penguins: A lacustrine sediment record, Penguin Island, West Antarctica |
title_full |
Impact of the ‘Little Ice Age’ climate cooling on the maar lake ecosystem affected by penguins: A lacustrine sediment record, Penguin Island, West Antarctica |
title_fullStr |
Impact of the ‘Little Ice Age’ climate cooling on the maar lake ecosystem affected by penguins: A lacustrine sediment record, Penguin Island, West Antarctica |
title_full_unstemmed |
Impact of the ‘Little Ice Age’ climate cooling on the maar lake ecosystem affected by penguins: A lacustrine sediment record, Penguin Island, West Antarctica |
title_sort |
impact of the ‘little ice age’ climate cooling on the maar lake ecosystem affected by penguins: a lacustrine sediment record, penguin island, west antarctica |
publisher |
SAGE Publications |
publishDate |
2017 |
url |
http://dx.doi.org/10.1177/0959683616683254 http://journals.sagepub.com/doi/pdf/10.1177/0959683616683254 http://journals.sagepub.com/doi/full-xml/10.1177/0959683616683254 |
genre |
Antarc* Antarctic Antarctica Deception Island Penguin Island West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Deception Island Penguin Island West Antarctica |
op_source |
The Holocene volume 27, issue 8, page 1115-1131 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683616683254 |
container_title |
The Holocene |
container_volume |
27 |
container_issue |
8 |
container_start_page |
1115 |
op_container_end_page |
1131 |
_version_ |
1810490316811141120 |