Lake diatom response to recent Arctic warming in Finnish Lapland
Abstract High‐resolution palaeolimnological data from a number of remote and nonpolluted lakes in Finnish Lapland reveal a distinct change in diatom assemblages. This parallels the post‐19th century Arctic warming detected by examination of long‐term instrumental series, historical records of ice co...
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crwiley:10.1046/j.1365-2486.2002.00463.x 2024-09-15T18:41:08+00:00 Lake diatom response to recent Arctic warming in Finnish Lapland Sorvari, Sanna Korhola, Atte Thompson, Roy 2002 http://dx.doi.org/10.1046/j.1365-2486.2002.00463.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2486.2002.00463.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2486.2002.00463.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 8, issue 2, page 171-181 ISSN 1354-1013 1365-2486 journal-article 2002 crwiley https://doi.org/10.1046/j.1365-2486.2002.00463.x 2024-07-04T04:30:12Z Abstract High‐resolution palaeolimnological data from a number of remote and nonpolluted lakes in Finnish Lapland reveal a distinct change in diatom assemblages. This parallels the post‐19th century Arctic warming detected by examination of long‐term instrumental series, historical records of ice cover and tree‐ring measurements. The change was predominantly from benthos to plankton and affected the overall diatom species richness. A particularly strong relationship was found between spring temperatures and compositional structure of diatoms. The change is irrespective of the lake type and catchment characteristics, and is reflected by several other biological indicators, such as chrysophytes and zooplankton, suggesting that entire lake ecosystems have been affected. No corresponding change in the diatom‐inferred lake‐water pH was observed; hence, atmospheric fallout of acid substances cannot have been the driving force for the observed biological change. The mechanism behind the diatom response is unclear, but it may be related to decreased ice‐cover duration, prolonged growing season and increased thermal stability. We postulate that 19th century Arctic warming, rather than acidic or other anthropogenic deposition, is responsible for the recent ecological changes in these high latitude lakes. Article in Journal/Newspaper Zooplankton Lapland Wiley Online Library Global Change Biology 8 2 171 181 |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract High‐resolution palaeolimnological data from a number of remote and nonpolluted lakes in Finnish Lapland reveal a distinct change in diatom assemblages. This parallels the post‐19th century Arctic warming detected by examination of long‐term instrumental series, historical records of ice cover and tree‐ring measurements. The change was predominantly from benthos to plankton and affected the overall diatom species richness. A particularly strong relationship was found between spring temperatures and compositional structure of diatoms. The change is irrespective of the lake type and catchment characteristics, and is reflected by several other biological indicators, such as chrysophytes and zooplankton, suggesting that entire lake ecosystems have been affected. No corresponding change in the diatom‐inferred lake‐water pH was observed; hence, atmospheric fallout of acid substances cannot have been the driving force for the observed biological change. The mechanism behind the diatom response is unclear, but it may be related to decreased ice‐cover duration, prolonged growing season and increased thermal stability. We postulate that 19th century Arctic warming, rather than acidic or other anthropogenic deposition, is responsible for the recent ecological changes in these high latitude lakes. |
format |
Article in Journal/Newspaper |
author |
Sorvari, Sanna Korhola, Atte Thompson, Roy |
spellingShingle |
Sorvari, Sanna Korhola, Atte Thompson, Roy Lake diatom response to recent Arctic warming in Finnish Lapland |
author_facet |
Sorvari, Sanna Korhola, Atte Thompson, Roy |
author_sort |
Sorvari, Sanna |
title |
Lake diatom response to recent Arctic warming in Finnish Lapland |
title_short |
Lake diatom response to recent Arctic warming in Finnish Lapland |
title_full |
Lake diatom response to recent Arctic warming in Finnish Lapland |
title_fullStr |
Lake diatom response to recent Arctic warming in Finnish Lapland |
title_full_unstemmed |
Lake diatom response to recent Arctic warming in Finnish Lapland |
title_sort |
lake diatom response to recent arctic warming in finnish lapland |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1046/j.1365-2486.2002.00463.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2486.2002.00463.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2486.2002.00463.x |
genre |
Zooplankton Lapland |
genre_facet |
Zooplankton Lapland |
op_source |
Global Change Biology volume 8, issue 2, page 171-181 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2486.2002.00463.x |
container_title |
Global Change Biology |
container_volume |
8 |
container_issue |
2 |
container_start_page |
171 |
op_container_end_page |
181 |
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1810485558441410560 |