Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen
Abstract In order to simulate the warming effects on Arctic wetlands, three passive open-top chambers (OTCs) and three control cage-like structures (CCSs) equipped with soil temperature and soil volumetric water content (VWC) probes for continuous micro- climatic measurements were installed in a wet...
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2012
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crdegruyter:10.2478/v10183-012-0021-4 2023-05-15T15:11:32+02:00 Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen Elster, Josef Kvíderová, Jana Hájek, Tomáš Láska, Kamil Šimek, Miloslav 2012 http://dx.doi.org/10.2478/v10183-012-0021-4 http://content.sciendo.com/view/journals/popore/33/4/article-p395.xml https://www.degruyter.com/view/j/popore.2012.33.issue-4/v10183-012-0021-4/v10183-012-0021-4.pdf unknown Walter de Gruyter GmbH Polish Polar Research volume 33, issue 4, page 395-420 ISSN 2081-8262 0138-0338 Ecology Ecology, Evolution, Behavior and Systematics journal-article 2012 crdegruyter https://doi.org/10.2478/v10183-012-0021-4 2022-05-11T14:47:26Z Abstract In order to simulate the warming effects on Arctic wetlands, three passive open-top chambers (OTCs) and three control cage-like structures (CCSs) equipped with soil temperature and soil volumetric water content (VWC) probes for continuous micro- climatic measurements were installed in a wet hummock meadow, Petuniabukta, Bille- fjorden, central Spitsbergen, in 2009. The warming effects on primary productivity were investigated during summer seasons 2009 and 2010 in cyanobacterial colonies of Nostoc commune s.l., which plays an important role in the local carbon and nitrogen cycles. The microclimatic data indicated that the effect of OTCs was dependent on microtopography. During winter, two short-term snow-thaw episodes occurred, so that liquid water was available for the Nostoc communities. Because of the warming, the OTC hummock bases remained unfrozen three weeks longer in comparison to the CCSs and, in spring, the OTC hummock tops and bases exceeded 0°C several days earlier than CCS ones. Mean summer temperature differences were 1.6°C in OTC and CCS hummock tops, and 0.3°C in the OTC and CCS hummock bases. The hummock tops were drier than their bases; however the VWC difference between theOTCs and CCSs was small. Due to the onlyminor differences in the microclimate of OTC and CCS hummock bases, where the Nostoc colonies were located, no differences in ecophysiological characteristics of Nostoc colonies expressed as photochemistry parameters and nitrogenase activities were detected after two years exposition. Long-term monitoring of Nostoc ecophysiology in a manipulated environment is necessary for understanding their development under climate warming. Article in Journal/Newspaper Arctic Polar Research Spitsbergen De Gruyter (via Crossref) Arctic Petuniabukta ENVELOPE(16.532,16.532,78.687,78.687) Polish Polar Research 33 4 395 420 |
institution |
Open Polar |
collection |
De Gruyter (via Crossref) |
op_collection_id |
crdegruyter |
language |
unknown |
topic |
Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology Ecology, Evolution, Behavior and Systematics Elster, Josef Kvíderová, Jana Hájek, Tomáš Láska, Kamil Šimek, Miloslav Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen |
topic_facet |
Ecology Ecology, Evolution, Behavior and Systematics |
description |
Abstract In order to simulate the warming effects on Arctic wetlands, three passive open-top chambers (OTCs) and three control cage-like structures (CCSs) equipped with soil temperature and soil volumetric water content (VWC) probes for continuous micro- climatic measurements were installed in a wet hummock meadow, Petuniabukta, Bille- fjorden, central Spitsbergen, in 2009. The warming effects on primary productivity were investigated during summer seasons 2009 and 2010 in cyanobacterial colonies of Nostoc commune s.l., which plays an important role in the local carbon and nitrogen cycles. The microclimatic data indicated that the effect of OTCs was dependent on microtopography. During winter, two short-term snow-thaw episodes occurred, so that liquid water was available for the Nostoc communities. Because of the warming, the OTC hummock bases remained unfrozen three weeks longer in comparison to the CCSs and, in spring, the OTC hummock tops and bases exceeded 0°C several days earlier than CCS ones. Mean summer temperature differences were 1.6°C in OTC and CCS hummock tops, and 0.3°C in the OTC and CCS hummock bases. The hummock tops were drier than their bases; however the VWC difference between theOTCs and CCSs was small. Due to the onlyminor differences in the microclimate of OTC and CCS hummock bases, where the Nostoc colonies were located, no differences in ecophysiological characteristics of Nostoc colonies expressed as photochemistry parameters and nitrogenase activities were detected after two years exposition. Long-term monitoring of Nostoc ecophysiology in a manipulated environment is necessary for understanding their development under climate warming. |
format |
Article in Journal/Newspaper |
author |
Elster, Josef Kvíderová, Jana Hájek, Tomáš Láska, Kamil Šimek, Miloslav |
author_facet |
Elster, Josef Kvíderová, Jana Hájek, Tomáš Láska, Kamil Šimek, Miloslav |
author_sort |
Elster, Josef |
title |
Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen |
title_short |
Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen |
title_full |
Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen |
title_fullStr |
Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen |
title_full_unstemmed |
Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen |
title_sort |
impact of warming on nostoc colonies (cyanobacteria) in a wet hummock meadow, spitsbergen |
publisher |
Walter de Gruyter GmbH |
publishDate |
2012 |
url |
http://dx.doi.org/10.2478/v10183-012-0021-4 http://content.sciendo.com/view/journals/popore/33/4/article-p395.xml https://www.degruyter.com/view/j/popore.2012.33.issue-4/v10183-012-0021-4/v10183-012-0021-4.pdf |
long_lat |
ENVELOPE(16.532,16.532,78.687,78.687) |
geographic |
Arctic Petuniabukta |
geographic_facet |
Arctic Petuniabukta |
genre |
Arctic Polar Research Spitsbergen |
genre_facet |
Arctic Polar Research Spitsbergen |
op_source |
Polish Polar Research volume 33, issue 4, page 395-420 ISSN 2081-8262 0138-0338 |
op_doi |
https://doi.org/10.2478/v10183-012-0021-4 |
container_title |
Polish Polar Research |
container_volume |
33 |
container_issue |
4 |
container_start_page |
395 |
op_container_end_page |
420 |
_version_ |
1766342370516795392 |