Is diatom richness responding to catchment glaciation? A case study from Cana+9dian headwater streams
Due to global change affecting glaciers worldwide, glacial streams are seen as threatened environments deserving specific scientific interest. Glacial streams from the Coast Range and Rocky Mountains in British Columbia and at the border to Alberta were investigated. In particular glacial streams an...
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2012
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Online Access: | https://doi.org/10.4081/jlimnol.2012.e7 https://doaj.org/article/1ff35714e31b4f7bafcd20bd844fc521 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:1ff35714e31b4f7bafcd20bd844fc521 2023-05-15T15:15:46+02:00 Is diatom richness responding to catchment glaciation? A case study from Cana+9dian headwater streams Eugen Rott Doris Gesierich 2012-01-01 https://doi.org/10.4081/jlimnol.2012.e7 https://doaj.org/article/1ff35714e31b4f7bafcd20bd844fc521 en eng PAGEPress Publications doi:10.4081/jlimnol.2012.e7 1129-5767 1723-8633 https://doaj.org/article/1ff35714e31b4f7bafcd20bd844fc521 undefined Journal of Limnology, Vol 71, Iss 1, Pp e7-e7 (2012) hydrobiology glacial streams oligotrophy diatoms biodiversity envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.4081/jlimnol.2012.e7 2023-01-22T19:11:29Z Due to global change affecting glaciers worldwide, glacial streams are seen as threatened environments deserving specific scientific interest. Glacial streams from the Coast Range and Rocky Mountains in British Columbia and at the border to Alberta were investigated. In particular glacial streams and downstream sites in the Joffré Lakes Provincial Park, a near by mountain river and two large glacial streams in the Rocky Mountains (Kootenay Range, Jasper National Park) were studied. Regardless of a high variability of catchment glaciation (1 to 99%) thin organic biofilms with firmly attached diatom frustules of the genera Achnanthidium, Psammothidium, Encyonema, Gomphonema and fragilaroid taxa were found in all cases. In spite of fundamentally different geological conditions between the Coast Range sites and the Rocky Mountain sites, the pioneer taxon Achnanthidium minutissimum (with a slimy long ecomorph) was dominating quantitatively in most of the glacier stream samples together with the rheobiontic Hannaea arcus. Individual glacier stream samples were characterized by the dominance of Achnanthidium petersenii and Gomphonema calcifugum/Encyonema latens. The diatom community analysis (cluster analysis) revealed the expected separation of glacier stream sites and sites of the lower segments of the river continuum (e.g., dominance of Diatoma ehrenbergii in the mountain river). In the Joffré area, the total species richness of turbid glacial streams close to the glacier mouth was significantly lower than in the more distant sites. The two largest glacial streams in the Rocky Mountains showed divergent results with a remarkable high species richness (43 taxa) at the Athabasca River origin (Columbia Icefield) and low diversity in Illecillewaet river (9 km downstream the glacier mouth). From the biogeographical point of view the dominant taxa comprised mainly widespread pioneer species coping best with the unstable conditions, while the subdominant taxa comprised taxa specific for pristine arctic-alpine or high ... Article in Journal/Newspaper Arctic Athabasca River Unknown Arctic Athabasca River Journal of Limnology 71 1 7 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
hydrobiology glacial streams oligotrophy diatoms biodiversity envir geo |
spellingShingle |
hydrobiology glacial streams oligotrophy diatoms biodiversity envir geo Eugen Rott Doris Gesierich Is diatom richness responding to catchment glaciation? A case study from Cana+9dian headwater streams |
topic_facet |
hydrobiology glacial streams oligotrophy diatoms biodiversity envir geo |
description |
Due to global change affecting glaciers worldwide, glacial streams are seen as threatened environments deserving specific scientific interest. Glacial streams from the Coast Range and Rocky Mountains in British Columbia and at the border to Alberta were investigated. In particular glacial streams and downstream sites in the Joffré Lakes Provincial Park, a near by mountain river and two large glacial streams in the Rocky Mountains (Kootenay Range, Jasper National Park) were studied. Regardless of a high variability of catchment glaciation (1 to 99%) thin organic biofilms with firmly attached diatom frustules of the genera Achnanthidium, Psammothidium, Encyonema, Gomphonema and fragilaroid taxa were found in all cases. In spite of fundamentally different geological conditions between the Coast Range sites and the Rocky Mountain sites, the pioneer taxon Achnanthidium minutissimum (with a slimy long ecomorph) was dominating quantitatively in most of the glacier stream samples together with the rheobiontic Hannaea arcus. Individual glacier stream samples were characterized by the dominance of Achnanthidium petersenii and Gomphonema calcifugum/Encyonema latens. The diatom community analysis (cluster analysis) revealed the expected separation of glacier stream sites and sites of the lower segments of the river continuum (e.g., dominance of Diatoma ehrenbergii in the mountain river). In the Joffré area, the total species richness of turbid glacial streams close to the glacier mouth was significantly lower than in the more distant sites. The two largest glacial streams in the Rocky Mountains showed divergent results with a remarkable high species richness (43 taxa) at the Athabasca River origin (Columbia Icefield) and low diversity in Illecillewaet river (9 km downstream the glacier mouth). From the biogeographical point of view the dominant taxa comprised mainly widespread pioneer species coping best with the unstable conditions, while the subdominant taxa comprised taxa specific for pristine arctic-alpine or high ... |
format |
Article in Journal/Newspaper |
author |
Eugen Rott Doris Gesierich |
author_facet |
Eugen Rott Doris Gesierich |
author_sort |
Eugen Rott |
title |
Is diatom richness responding to catchment glaciation? A case study from Cana+9dian headwater streams |
title_short |
Is diatom richness responding to catchment glaciation? A case study from Cana+9dian headwater streams |
title_full |
Is diatom richness responding to catchment glaciation? A case study from Cana+9dian headwater streams |
title_fullStr |
Is diatom richness responding to catchment glaciation? A case study from Cana+9dian headwater streams |
title_full_unstemmed |
Is diatom richness responding to catchment glaciation? A case study from Cana+9dian headwater streams |
title_sort |
is diatom richness responding to catchment glaciation? a case study from cana+9dian headwater streams |
publisher |
PAGEPress Publications |
publishDate |
2012 |
url |
https://doi.org/10.4081/jlimnol.2012.e7 https://doaj.org/article/1ff35714e31b4f7bafcd20bd844fc521 |
geographic |
Arctic Athabasca River |
geographic_facet |
Arctic Athabasca River |
genre |
Arctic Athabasca River |
genre_facet |
Arctic Athabasca River |
op_source |
Journal of Limnology, Vol 71, Iss 1, Pp e7-e7 (2012) |
op_relation |
doi:10.4081/jlimnol.2012.e7 1129-5767 1723-8633 https://doaj.org/article/1ff35714e31b4f7bafcd20bd844fc521 |
op_rights |
undefined |
op_doi |
https://doi.org/10.4081/jlimnol.2012.e7 |
container_title |
Journal of Limnology |
container_volume |
71 |
container_issue |
1 |
container_start_page |
7 |
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1766346109542727680 |