Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes
We investigated productivity at the basal trophic level in 15 unproductive lakes in a gradient ranging from clear‐water to brown‐water (humic) lakes in northern Sweden. Primary production and bacterial production in benthic and pelagic habitats were measured to estimate the variation in energy mobil...
Published in: | Limnology and Oceanography |
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Language: | English |
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Online Access: | http://dx.doi.org/10.4319/lo.2009.54.6.2034 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2009.54.6.2034 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2009.54.6.2034 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2009.54.6.2034 |
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crwiley:10.4319/lo.2009.54.6.2034 2024-06-23T07:55:37+00:00 Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes Ask, Jenny Karlsson, Jan Persson, Lennart Ask, Per Byström, Pär Jansson, Mats 2009 http://dx.doi.org/10.4319/lo.2009.54.6.2034 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2009.54.6.2034 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2009.54.6.2034 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2009.54.6.2034 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 54, issue 6, page 2034-2040 ISSN 0024-3590 1939-5590 journal-article 2009 crwiley https://doi.org/10.4319/lo.2009.54.6.2034 2024-05-31T08:10:52Z We investigated productivity at the basal trophic level in 15 unproductive lakes in a gradient ranging from clear‐water to brown‐water (humic) lakes in northern Sweden. Primary production and bacterial production in benthic and pelagic habitats were measured to estimate the variation in energy mobilization from external energy sources (primary production plus bacterial production on allochthonous organic carbon) along the gradient. Clear‐water lakes were dominated by autotrophic energy mobilization in the benthic habitat, whereas humic lakes were dominated by heterotrophic energy mobilization in the pelagic habitat. Whole‐lake (benthic + pelagic) energy mobilization was negatively correlated to the light‐extinction coefficient, which was determined by colored terrestrial organic matter in the lake water. Thus, variation in the concentration of terrestrial organic matter and its light‐absorbing characteristics exerts strong control on the magnitude, as well as on the processes and pathways, of energy mobilization in unproductive lakes. We suggest that unproductive lakes in general are sensitive to input of terrestrial organic matter because of its effects on basal energy mobilization in both benthic and pelagic habitats. Article in Journal/Newspaper Northern Sweden Wiley Online Library Limnology and Oceanography 54 6 2034 2040 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
We investigated productivity at the basal trophic level in 15 unproductive lakes in a gradient ranging from clear‐water to brown‐water (humic) lakes in northern Sweden. Primary production and bacterial production in benthic and pelagic habitats were measured to estimate the variation in energy mobilization from external energy sources (primary production plus bacterial production on allochthonous organic carbon) along the gradient. Clear‐water lakes were dominated by autotrophic energy mobilization in the benthic habitat, whereas humic lakes were dominated by heterotrophic energy mobilization in the pelagic habitat. Whole‐lake (benthic + pelagic) energy mobilization was negatively correlated to the light‐extinction coefficient, which was determined by colored terrestrial organic matter in the lake water. Thus, variation in the concentration of terrestrial organic matter and its light‐absorbing characteristics exerts strong control on the magnitude, as well as on the processes and pathways, of energy mobilization in unproductive lakes. We suggest that unproductive lakes in general are sensitive to input of terrestrial organic matter because of its effects on basal energy mobilization in both benthic and pelagic habitats. |
format |
Article in Journal/Newspaper |
author |
Ask, Jenny Karlsson, Jan Persson, Lennart Ask, Per Byström, Pär Jansson, Mats |
spellingShingle |
Ask, Jenny Karlsson, Jan Persson, Lennart Ask, Per Byström, Pär Jansson, Mats Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes |
author_facet |
Ask, Jenny Karlsson, Jan Persson, Lennart Ask, Per Byström, Pär Jansson, Mats |
author_sort |
Ask, Jenny |
title |
Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes |
title_short |
Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes |
title_full |
Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes |
title_fullStr |
Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes |
title_full_unstemmed |
Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes |
title_sort |
terrestrial organic matter and light penetration: effects on bacterial and primary production in lakes |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.4319/lo.2009.54.6.2034 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2009.54.6.2034 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2009.54.6.2034 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2009.54.6.2034 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Limnology and Oceanography volume 54, issue 6, page 2034-2040 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2009.54.6.2034 |
container_title |
Limnology and Oceanography |
container_volume |
54 |
container_issue |
6 |
container_start_page |
2034 |
op_container_end_page |
2040 |
_version_ |
1802648267512610816 |