Bakteriell produktion i humösa istäckta sjöar i norra Sverige
The main purposes of this study were to 1) quantify bacterial production in winter during ice conditions, and 2) to compare these production measures with values measured from summer and open water conditions in three humic lakes situated in northern Sweden. Another purpose of this study was to 3) e...
Main Author: | |
---|---|
Format: | Bachelor Thesis |
Language: | Swedish |
Published: |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2014
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89646 |
id |
ftumeauniv:oai:DiVA.org:umu-89646 |
---|---|
record_format |
openpolar |
spelling |
ftumeauniv:oai:DiVA.org:umu-89646 2023-10-09T21:53:45+02:00 Bakteriell produktion i humösa istäckta sjöar i norra Sverige Magnusson, Erik 2014 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89646 swe swe Umeå universitet, Institutionen för ekologi, miljö och geovetenskap http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89646 info:eu-repo/semantics/openAccess Bakteriell produktion DOC ytvatten limnologi Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Student thesis info:eu-repo/semantics/bachelorThesis text 2014 ftumeauniv 2023-09-22T13:45:49Z The main purposes of this study were to 1) quantify bacterial production in winter during ice conditions, and 2) to compare these production measures with values measured from summer and open water conditions in three humic lakes situated in northern Sweden. Another purpose of this study was to 3) examine whether clear-cutting significantly affected bacterial production or water chemistry in two lakes situated in catchments were a large part of the forest had been removed through logging compared to an undisturbed reference lake. In winter (March/April 2014), the bacterial production ranged from 0, 7 - 2, 2 µgC/L/day and in the summer of 2013 the production values was 4 – 10 times higher. The main reason for lower bacterial production in winter was ascribed to lower water temperatures as well as to older and more recalcitrant DOC, as there were no significant differences in total dissolved nitrogen or DOC concentration or -quality, that could explain a lower production compared to summer. It was not possible to detect any effects of the clear-cutting using the approach of only comparing between the lakes situated in clear-cut watersheds, with an undisturbed reference lake. Bachelor Thesis Norra Sverige Northern Sweden Umeå University: Publications (DiVA) |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
Swedish |
topic |
Bakteriell produktion DOC ytvatten limnologi Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
spellingShingle |
Bakteriell produktion DOC ytvatten limnologi Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Magnusson, Erik Bakteriell produktion i humösa istäckta sjöar i norra Sverige |
topic_facet |
Bakteriell produktion DOC ytvatten limnologi Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
description |
The main purposes of this study were to 1) quantify bacterial production in winter during ice conditions, and 2) to compare these production measures with values measured from summer and open water conditions in three humic lakes situated in northern Sweden. Another purpose of this study was to 3) examine whether clear-cutting significantly affected bacterial production or water chemistry in two lakes situated in catchments were a large part of the forest had been removed through logging compared to an undisturbed reference lake. In winter (March/April 2014), the bacterial production ranged from 0, 7 - 2, 2 µgC/L/day and in the summer of 2013 the production values was 4 – 10 times higher. The main reason for lower bacterial production in winter was ascribed to lower water temperatures as well as to older and more recalcitrant DOC, as there were no significant differences in total dissolved nitrogen or DOC concentration or -quality, that could explain a lower production compared to summer. It was not possible to detect any effects of the clear-cutting using the approach of only comparing between the lakes situated in clear-cut watersheds, with an undisturbed reference lake. |
format |
Bachelor Thesis |
author |
Magnusson, Erik |
author_facet |
Magnusson, Erik |
author_sort |
Magnusson, Erik |
title |
Bakteriell produktion i humösa istäckta sjöar i norra Sverige |
title_short |
Bakteriell produktion i humösa istäckta sjöar i norra Sverige |
title_full |
Bakteriell produktion i humösa istäckta sjöar i norra Sverige |
title_fullStr |
Bakteriell produktion i humösa istäckta sjöar i norra Sverige |
title_full_unstemmed |
Bakteriell produktion i humösa istäckta sjöar i norra Sverige |
title_sort |
bakteriell produktion i humösa istäckta sjöar i norra sverige |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2014 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89646 |
genre |
Norra Sverige Northern Sweden |
genre_facet |
Norra Sverige Northern Sweden |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89646 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1779317070504132608 |