Response of Cyclotella species to nutrients and incubation depth in Arctic lakes
The relative abundances of small centric diatoms have increased in many Arctic lakes over the past century, with these changes commonly attributed to warming. However, the specific mechanisms by which diatom community structure is changing in response to warming remain unclear. We investigated the r...
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fthighwire:oai:open-archive.highwire.org:plankt:fbt126v1 2023-05-15T14:52:36+02:00 Response of Cyclotella species to nutrients and incubation depth in Arctic lakes Saros, Jasmine E. Strock, Kristin E. Mccue, Joan Hogan, Erika Anderson, N. John 2013-12-18 00:20:50.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/fbt126v1 https://doi.org/10.1093/plankt/fbt126 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/fbt126v1 http://dx.doi.org/10.1093/plankt/fbt126 Copyright (C) 2013, Oxford University Press Article TEXT 2013 fthighwire https://doi.org/10.1093/plankt/fbt126 2016-11-16T18:36:03Z The relative abundances of small centric diatoms have increased in many Arctic lakes over the past century, with these changes commonly attributed to warming. However, the specific mechanisms by which diatom community structure is changing in response to warming remain unclear. We investigated the responses of two common centric diatoms to nutrient enrichment and incubation depth, the latter used to manipulate light availability which is a key factor that changes with altered mixing depths in lakes. We conducted 2 × 2 factorial experiments, manipulating nutrients (none added or N + P addition) and incubation depth (shallow or deep), and measured changes in growth rates and cell densities of Discostella stelligera and Puncticulata radiosa . A second set of experiments was conducted on D. stelligera in a growth chamber to separate temperature and light effects associated with incubation depth. Puncticulata radiosa was always more abundant in the shallow depth incubations, regardless of nutrient conditions. In contrast, D. stelligera responded most strongly to nutrient additions, and cell densities of this species were affected by interactions between nutrients and incubation depth or light. Our research suggests that processes that alter light availability (such as water clarity and water column stability) and nutrient concentrations are likely to play a major role in controlling the growth of small centric diatoms in Arctic lakes. Text Arctic HighWire Press (Stanford University) Arctic Journal of Plankton Research 36 2 450 460 |
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Article Saros, Jasmine E. Strock, Kristin E. Mccue, Joan Hogan, Erika Anderson, N. John Response of Cyclotella species to nutrients and incubation depth in Arctic lakes |
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Article |
description |
The relative abundances of small centric diatoms have increased in many Arctic lakes over the past century, with these changes commonly attributed to warming. However, the specific mechanisms by which diatom community structure is changing in response to warming remain unclear. We investigated the responses of two common centric diatoms to nutrient enrichment and incubation depth, the latter used to manipulate light availability which is a key factor that changes with altered mixing depths in lakes. We conducted 2 × 2 factorial experiments, manipulating nutrients (none added or N + P addition) and incubation depth (shallow or deep), and measured changes in growth rates and cell densities of Discostella stelligera and Puncticulata radiosa . A second set of experiments was conducted on D. stelligera in a growth chamber to separate temperature and light effects associated with incubation depth. Puncticulata radiosa was always more abundant in the shallow depth incubations, regardless of nutrient conditions. In contrast, D. stelligera responded most strongly to nutrient additions, and cell densities of this species were affected by interactions between nutrients and incubation depth or light. Our research suggests that processes that alter light availability (such as water clarity and water column stability) and nutrient concentrations are likely to play a major role in controlling the growth of small centric diatoms in Arctic lakes. |
format |
Text |
author |
Saros, Jasmine E. Strock, Kristin E. Mccue, Joan Hogan, Erika Anderson, N. John |
author_facet |
Saros, Jasmine E. Strock, Kristin E. Mccue, Joan Hogan, Erika Anderson, N. John |
author_sort |
Saros, Jasmine E. |
title |
Response of Cyclotella species to nutrients and incubation depth in Arctic lakes |
title_short |
Response of Cyclotella species to nutrients and incubation depth in Arctic lakes |
title_full |
Response of Cyclotella species to nutrients and incubation depth in Arctic lakes |
title_fullStr |
Response of Cyclotella species to nutrients and incubation depth in Arctic lakes |
title_full_unstemmed |
Response of Cyclotella species to nutrients and incubation depth in Arctic lakes |
title_sort |
response of cyclotella species to nutrients and incubation depth in arctic lakes |
publisher |
Oxford University Press |
publishDate |
2013 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/fbt126v1 https://doi.org/10.1093/plankt/fbt126 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/fbt126v1 http://dx.doi.org/10.1093/plankt/fbt126 |
op_rights |
Copyright (C) 2013, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/fbt126 |
container_title |
Journal of Plankton Research |
container_volume |
36 |
container_issue |
2 |
container_start_page |
450 |
op_container_end_page |
460 |
_version_ |
1766323828077625344 |