A whole‐lake experiment confirms a small centric diatom species as an indicator of changing lake thermal structure
Abstract In many lakes across the Northern Hemisphere, paleolimnological records have revealed that the relative abundances of the small centric diatom, Discostella stelligera, changed over the past century, with these widespread shifts attributed to climate change. Specifically, small‐scale experim...
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ftdoajarticles:oai:doaj.org/article:685d8d6c7d4d492d87738bb8a2c599f3 2023-05-15T15:11:21+02:00 A whole‐lake experiment confirms a small centric diatom species as an indicator of changing lake thermal structure Jasmine E. Saros Robert M. Northington Dennis S. Anderson Nicholas John Anderson 2016-12-01T00:00:00Z https://doi.org/10.1002/lol2.10024 https://doaj.org/article/685d8d6c7d4d492d87738bb8a2c599f3 EN eng Wiley https://doi.org/10.1002/lol2.10024 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10024 https://doaj.org/article/685d8d6c7d4d492d87738bb8a2c599f3 Limnology and Oceanography Letters, Vol 1, Iss 1, Pp 27-35 (2016) Discostella stelligera lake thermal structure whole‐lake experiment climate change Oceanography GC1-1581 article 2016 ftdoajarticles https://doi.org/10.1002/lol2.10024 2022-12-31T04:15:25Z Abstract In many lakes across the Northern Hemisphere, paleolimnological records have revealed that the relative abundances of the small centric diatom, Discostella stelligera, changed over the past century, with these widespread shifts attributed to climate change. Specifically, small‐scale experiments and current spatial distribution patterns suggested that this species is more abundant when lake mixing depths are shallower, but a direct test of this hypothesis at the whole‐lake scale was lacking. We conducted a whole‐lake mixing manipulation in a remote arctic lake that normally has relatively shallow thermal stratification and abundant D. stelligera populations during the summer. We employed a “Before‐After‐Control‐Impact” design using an experimental lake and a control lake. Lake thermal structure and diatom populations were monitored in both lakes in summer 2013 without manipulating either lake, and again in summer 2014 when the experimental lake was manipulated to achieve deeper mixing depths. The abundance of D. stelligera declined during the manipulated period of deeper mixing in 2014, while it increased during the same time frame in the control lake. The same pattern was not observed for the four other diatom taxa found in both lakes in both years. Our results confirm the use of D. stelligera as an indicator of changing lake thermal structure, and suggest that the broader application of this tool to lake sediment records will yield greater insight into longer‐term variability in the response of lake ecosystems to climate. Article in Journal/Newspaper Arctic Climate change Directory of Open Access Journals: DOAJ Articles Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Changing Lake ENVELOPE(-45.619,-45.619,-60.708,-60.708) Limnology and Oceanography Letters 1 1 27 35 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Discostella stelligera lake thermal structure whole‐lake experiment climate change Oceanography GC1-1581 |
spellingShingle |
Discostella stelligera lake thermal structure whole‐lake experiment climate change Oceanography GC1-1581 Jasmine E. Saros Robert M. Northington Dennis S. Anderson Nicholas John Anderson A whole‐lake experiment confirms a small centric diatom species as an indicator of changing lake thermal structure |
topic_facet |
Discostella stelligera lake thermal structure whole‐lake experiment climate change Oceanography GC1-1581 |
description |
Abstract In many lakes across the Northern Hemisphere, paleolimnological records have revealed that the relative abundances of the small centric diatom, Discostella stelligera, changed over the past century, with these widespread shifts attributed to climate change. Specifically, small‐scale experiments and current spatial distribution patterns suggested that this species is more abundant when lake mixing depths are shallower, but a direct test of this hypothesis at the whole‐lake scale was lacking. We conducted a whole‐lake mixing manipulation in a remote arctic lake that normally has relatively shallow thermal stratification and abundant D. stelligera populations during the summer. We employed a “Before‐After‐Control‐Impact” design using an experimental lake and a control lake. Lake thermal structure and diatom populations were monitored in both lakes in summer 2013 without manipulating either lake, and again in summer 2014 when the experimental lake was manipulated to achieve deeper mixing depths. The abundance of D. stelligera declined during the manipulated period of deeper mixing in 2014, while it increased during the same time frame in the control lake. The same pattern was not observed for the four other diatom taxa found in both lakes in both years. Our results confirm the use of D. stelligera as an indicator of changing lake thermal structure, and suggest that the broader application of this tool to lake sediment records will yield greater insight into longer‐term variability in the response of lake ecosystems to climate. |
format |
Article in Journal/Newspaper |
author |
Jasmine E. Saros Robert M. Northington Dennis S. Anderson Nicholas John Anderson |
author_facet |
Jasmine E. Saros Robert M. Northington Dennis S. Anderson Nicholas John Anderson |
author_sort |
Jasmine E. Saros |
title |
A whole‐lake experiment confirms a small centric diatom species as an indicator of changing lake thermal structure |
title_short |
A whole‐lake experiment confirms a small centric diatom species as an indicator of changing lake thermal structure |
title_full |
A whole‐lake experiment confirms a small centric diatom species as an indicator of changing lake thermal structure |
title_fullStr |
A whole‐lake experiment confirms a small centric diatom species as an indicator of changing lake thermal structure |
title_full_unstemmed |
A whole‐lake experiment confirms a small centric diatom species as an indicator of changing lake thermal structure |
title_sort |
whole‐lake experiment confirms a small centric diatom species as an indicator of changing lake thermal structure |
publisher |
Wiley |
publishDate |
2016 |
url |
https://doi.org/10.1002/lol2.10024 https://doaj.org/article/685d8d6c7d4d492d87738bb8a2c599f3 |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) ENVELOPE(-45.619,-45.619,-60.708,-60.708) |
geographic |
Arctic Arctic Lake Changing Lake |
geographic_facet |
Arctic Arctic Lake Changing Lake |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
Limnology and Oceanography Letters, Vol 1, Iss 1, Pp 27-35 (2016) |
op_relation |
https://doi.org/10.1002/lol2.10024 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10024 https://doaj.org/article/685d8d6c7d4d492d87738bb8a2c599f3 |
op_doi |
https://doi.org/10.1002/lol2.10024 |
container_title |
Limnology and Oceanography Letters |
container_volume |
1 |
container_issue |
1 |
container_start_page |
27 |
op_container_end_page |
35 |
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1766342214377537536 |