Algal communities associated with different alpine stream types
We investigated major physical-chemical characteristics and benthic algae of different alpine lotic systems comprising streams and lake outlets of rhithral and, kryal origin over an annual cycle. We also evaluated the structure of the algal communities and its relation to environmental characteristi...
Published in: | Arctic, Antarctic, and Alpine Research |
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Language: | English |
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Taylor & Francis
2001
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Online Access: | https://doi.org/10.2307/1552555 |
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fteawag:oai:dora:eawag_4264 2023-05-15T14:14:34+02:00 Algal communities associated with different alpine stream types Hieber, Mäggi Robinson, Christopher T. Rushforth, Samuel R. Uehlinger, Urs 2001 https://doi.org/10.2307/1552555 eng eng Taylor & Francis Arctic, Antarctic, and Alpine Research--Arct. Antarct. Alp. Res.--journals:245--1523-0430--1938-4246 eawag:4264 journal id: journals:245 issn: 1523-0430 e-issn: 1938-4246 ut: 000172713800011 local: 8723 doi:10.2307/1552555 scopus: 2-s2.0-0035659447 Text Journal Article 2001 fteawag https://doi.org/10.2307/1552555 2023-04-09T04:48:16Z We investigated major physical-chemical characteristics and benthic algae of different alpine lotic systems comprising streams and lake outlets of rhithral and, kryal origin over an annual cycle. We also evaluated the structure of the algal communities and its relation to environmental characteristics for the different stream types. Algal communities, were generally dominated by diatoms, Cyanophyta, and Hydrurus foetidus (Chrysophyceae). Community structure was similar among alpine streams and lake outlets, but more algal taxa occurred in take outlets (rhithral and kryal) than in kryal streams. Although algae were identified mainly to genera, distinct patterns in community structure were evident. A major environmental determinant of the algal community among stream types was the presence of a glacier and resulting seasonal differences in flow, temperature. and turbidity. An upstream lake was a secondary determinant in buffering seasonal fluctuations in environmental conditions thus leading to greater stability. Algal communities, consequently, were more diverse and less seasonally variable at lake outlets. The diatom genera Amphora , Denticula , Fragilaria , Gomphonema , Nitzschia , and Synedra and the blue-green algae Oscillatoria and Phormidium were characteristic of lake outlets, whereas Chamaesiphon (blue-green) and Hydrurus foetidus were indicative of kryal sites. Article in Journal/Newspaper Antarctic and Alpine Research Arctic DORA Eawag Arctic, Antarctic, and Alpine Research 33 4 447 |
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language |
English |
description |
We investigated major physical-chemical characteristics and benthic algae of different alpine lotic systems comprising streams and lake outlets of rhithral and, kryal origin over an annual cycle. We also evaluated the structure of the algal communities and its relation to environmental characteristics for the different stream types. Algal communities, were generally dominated by diatoms, Cyanophyta, and Hydrurus foetidus (Chrysophyceae). Community structure was similar among alpine streams and lake outlets, but more algal taxa occurred in take outlets (rhithral and kryal) than in kryal streams. Although algae were identified mainly to genera, distinct patterns in community structure were evident. A major environmental determinant of the algal community among stream types was the presence of a glacier and resulting seasonal differences in flow, temperature. and turbidity. An upstream lake was a secondary determinant in buffering seasonal fluctuations in environmental conditions thus leading to greater stability. Algal communities, consequently, were more diverse and less seasonally variable at lake outlets. The diatom genera Amphora , Denticula , Fragilaria , Gomphonema , Nitzschia , and Synedra and the blue-green algae Oscillatoria and Phormidium were characteristic of lake outlets, whereas Chamaesiphon (blue-green) and Hydrurus foetidus were indicative of kryal sites. |
format |
Article in Journal/Newspaper |
author |
Hieber, Mäggi Robinson, Christopher T. Rushforth, Samuel R. Uehlinger, Urs |
spellingShingle |
Hieber, Mäggi Robinson, Christopher T. Rushforth, Samuel R. Uehlinger, Urs Algal communities associated with different alpine stream types |
author_facet |
Hieber, Mäggi Robinson, Christopher T. Rushforth, Samuel R. Uehlinger, Urs |
author_sort |
Hieber, Mäggi |
title |
Algal communities associated with different alpine stream types |
title_short |
Algal communities associated with different alpine stream types |
title_full |
Algal communities associated with different alpine stream types |
title_fullStr |
Algal communities associated with different alpine stream types |
title_full_unstemmed |
Algal communities associated with different alpine stream types |
title_sort |
algal communities associated with different alpine stream types |
publisher |
Taylor & Francis |
publishDate |
2001 |
url |
https://doi.org/10.2307/1552555 |
genre |
Antarctic and Alpine Research Arctic |
genre_facet |
Antarctic and Alpine Research Arctic |
op_relation |
Arctic, Antarctic, and Alpine Research--Arct. Antarct. Alp. Res.--journals:245--1523-0430--1938-4246 eawag:4264 journal id: journals:245 issn: 1523-0430 e-issn: 1938-4246 ut: 000172713800011 local: 8723 doi:10.2307/1552555 scopus: 2-s2.0-0035659447 |
op_doi |
https://doi.org/10.2307/1552555 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
33 |
container_issue |
4 |
container_start_page |
447 |
_version_ |
1766286964381712384 |