The sensitivity of diatom taxa from Yakutian lakes (north-eastern Siberia) to electrical conductivity and other environmental variables
Relative abundances of 157 diatom taxa from Yakutian lake surface-sediments were investigated for their potential to indicate certain environmental conditions. Data from 206 sites from Arctic, sub-Arctic and boreal environments were included. Redundancy analyses were performed to assess the explanat...
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ftjpolarres:oai:journals.openacademia.net:article/2672 2023-05-15T14:55:52+02:00 The sensitivity of diatom taxa from Yakutian lakes (north-eastern Siberia) to electrical conductivity and other environmental variables Pestryakova, Luidmila A. Herzschuh, Ulrike Gorodnichev, Ruslan Wetterich, Sebastian 2018-07-31 application/pdf application/xml https://polarresearch.net/index.php/polar/article/view/2672 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2672/6095 https://polarresearch.net/index.php/polar/article/view/2672/6097 https://polarresearch.net/index.php/polar/article/view/2672/6099 https://polarresearch.net/index.php/polar/article/view/2672 Polar Research; Vol 37 (2018) 1751-8369 Temperature pH dissolved silica concentration Arctic diatom indicator species info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftjpolarres 2021-11-11T19:13:09Z Relative abundances of 157 diatom taxa from Yakutian lake surface-sediments were investigated for their potential to indicate certain environmental conditions. Data from 206 sites from Arctic, sub-Arctic and boreal environments were included. Redundancy analyses were performed to assess the explanatory power of mean July temperature (T July ), conductivity, pH, dissolved silica concentration, phosphate concentration, lake depth and vegetation type on diatom species composition. Boosted regression tree analyses were performed to infer the most relevant environmental variables for abundances of individual taxa and weighted average regression was applied to infer their respective optimum and tolerance. Electrical conductivity was best indicated by diatom taxa. In contrast, only few taxa were indicative of Si and water depth. Few taxa were related to specific pH values. Although T July explained the highest proportion of variance in the diatom spectra and was, after conductivity, the second-most selected splitting variable, we a priori decided not to present indicator taxa because of the poorly understood relationship between diatom occurrences and T July . In total, 92 diatom taxa were reliable indicators of a certain vegetation type or a combination of several types. The high numbers of indicative species for open vegetation sites and for forested sites suggest that the principal turnover is the transition from forest–tundra to northern taiga. Overall, our results reveal that preference ranges of diatom taxa for environmental variables are mostly broad, and the use of indicator taxa for the purposes of environmental reconstruction or environmental monitoring is therefore restricted to marked rather than subtle environmental transitions. Article in Journal/Newspaper Arctic Polar Research taiga Tundra Siberia Polar Research (E-Journal) Arctic |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Temperature pH dissolved silica concentration Arctic diatom indicator species |
spellingShingle |
Temperature pH dissolved silica concentration Arctic diatom indicator species Pestryakova, Luidmila A. Herzschuh, Ulrike Gorodnichev, Ruslan Wetterich, Sebastian The sensitivity of diatom taxa from Yakutian lakes (north-eastern Siberia) to electrical conductivity and other environmental variables |
topic_facet |
Temperature pH dissolved silica concentration Arctic diatom indicator species |
description |
Relative abundances of 157 diatom taxa from Yakutian lake surface-sediments were investigated for their potential to indicate certain environmental conditions. Data from 206 sites from Arctic, sub-Arctic and boreal environments were included. Redundancy analyses were performed to assess the explanatory power of mean July temperature (T July ), conductivity, pH, dissolved silica concentration, phosphate concentration, lake depth and vegetation type on diatom species composition. Boosted regression tree analyses were performed to infer the most relevant environmental variables for abundances of individual taxa and weighted average regression was applied to infer their respective optimum and tolerance. Electrical conductivity was best indicated by diatom taxa. In contrast, only few taxa were indicative of Si and water depth. Few taxa were related to specific pH values. Although T July explained the highest proportion of variance in the diatom spectra and was, after conductivity, the second-most selected splitting variable, we a priori decided not to present indicator taxa because of the poorly understood relationship between diatom occurrences and T July . In total, 92 diatom taxa were reliable indicators of a certain vegetation type or a combination of several types. The high numbers of indicative species for open vegetation sites and for forested sites suggest that the principal turnover is the transition from forest–tundra to northern taiga. Overall, our results reveal that preference ranges of diatom taxa for environmental variables are mostly broad, and the use of indicator taxa for the purposes of environmental reconstruction or environmental monitoring is therefore restricted to marked rather than subtle environmental transitions. |
format |
Article in Journal/Newspaper |
author |
Pestryakova, Luidmila A. Herzschuh, Ulrike Gorodnichev, Ruslan Wetterich, Sebastian |
author_facet |
Pestryakova, Luidmila A. Herzschuh, Ulrike Gorodnichev, Ruslan Wetterich, Sebastian |
author_sort |
Pestryakova, Luidmila A. |
title |
The sensitivity of diatom taxa from Yakutian lakes (north-eastern Siberia) to electrical conductivity and other environmental variables |
title_short |
The sensitivity of diatom taxa from Yakutian lakes (north-eastern Siberia) to electrical conductivity and other environmental variables |
title_full |
The sensitivity of diatom taxa from Yakutian lakes (north-eastern Siberia) to electrical conductivity and other environmental variables |
title_fullStr |
The sensitivity of diatom taxa from Yakutian lakes (north-eastern Siberia) to electrical conductivity and other environmental variables |
title_full_unstemmed |
The sensitivity of diatom taxa from Yakutian lakes (north-eastern Siberia) to electrical conductivity and other environmental variables |
title_sort |
sensitivity of diatom taxa from yakutian lakes (north-eastern siberia) to electrical conductivity and other environmental variables |
publisher |
Norwegian Polar Institute |
publishDate |
2018 |
url |
https://polarresearch.net/index.php/polar/article/view/2672 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Polar Research taiga Tundra Siberia |
genre_facet |
Arctic Polar Research taiga Tundra Siberia |
op_source |
Polar Research; Vol 37 (2018) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2672/6095 https://polarresearch.net/index.php/polar/article/view/2672/6097 https://polarresearch.net/index.php/polar/article/view/2672/6099 https://polarresearch.net/index.php/polar/article/view/2672 |
_version_ |
1766327872758218752 |