Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton
1. Five oligotrophic clear-water lakes on the Faroe Islands were studied during August 2000. Algal and bacterial production rates, community respiration, and CO2 saturation were determined. In addition, we examined the plankton community composition (phytoplankton and heterotrophic nanoflagellates)...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Wiley-Blackwell
2005
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Online Access: | https://lup.lub.lu.se/record/150649 https://doi.org/10.1111/j.1365-2427.2005.01440.x |
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ftulundlup:oai:lup.lub.lu.se:04c3bbbb-2998-4220-ada3-41b61c37499e 2023-05-15T16:10:37+02:00 Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton Pålsson, Carina Kritzberg, Emma Christoffersen, K Granéli, Wilhelm 2005 https://lup.lub.lu.se/record/150649 https://doi.org/10.1111/j.1365-2427.2005.01440.x eng eng Wiley-Blackwell https://lup.lub.lu.se/record/150649 http://dx.doi.org/10.1111/j.1365-2427.2005.01440.x wos:000233290000009 scopus:33745208799 Freshwater Biology; 50(12), pp 2011-2020 (2005) ISSN: 0046-5070 Ecology contributiontojournal/article info:eu-repo/semantics/article text 2005 ftulundlup https://doi.org/10.1111/j.1365-2427.2005.01440.x 2023-02-01T23:27:09Z 1. Five oligotrophic clear-water lakes on the Faroe Islands were studied during August 2000. Algal and bacterial production rates, community respiration, and CO2 saturation were determined. In addition, we examined the plankton community composition (phytoplankton and heterotrophic nanoflagellates) and measured the grazing pressure exerted by common mixotrophic species on bacteria. 2. High respiration to primary production (6.6–33.2) and supersaturation of CO2 (830–2140 μatm) implied that the lakes were net heterotrophic and that the pelagic heterotrophic plankton were subsidised by allochthonous organic carbon. However, in spite of the apparent high level of net heterotrophy, primary production exceeded bacterial production and the food base for higher trophic levels appeared to be mainly autotrophic. 3. We suggest that the observed net heterotrophy in these lakes was a result of the oligotrophic conditions and hence low primary production in combination with an input of allochthonous C with a relatively high availability. 4. Mixotrophic phytoplankton (Cryptomonas spp., Dinobryon spp. and flagellates cf. Ochromonas spp.) constituted a large percentage of the plankton community (17–83%), possibly as a result of their capacity to exploit bacteria as a means of acquiring nutrients in these nutrient poor systems. Article in Journal/Newspaper Faroe Islands Lund University Publications (LUP) Faroe Islands Freshwater Biology 50 12 2011 2020 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology |
spellingShingle |
Ecology Pålsson, Carina Kritzberg, Emma Christoffersen, K Granéli, Wilhelm Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton |
topic_facet |
Ecology |
description |
1. Five oligotrophic clear-water lakes on the Faroe Islands were studied during August 2000. Algal and bacterial production rates, community respiration, and CO2 saturation were determined. In addition, we examined the plankton community composition (phytoplankton and heterotrophic nanoflagellates) and measured the grazing pressure exerted by common mixotrophic species on bacteria. 2. High respiration to primary production (6.6–33.2) and supersaturation of CO2 (830–2140 μatm) implied that the lakes were net heterotrophic and that the pelagic heterotrophic plankton were subsidised by allochthonous organic carbon. However, in spite of the apparent high level of net heterotrophy, primary production exceeded bacterial production and the food base for higher trophic levels appeared to be mainly autotrophic. 3. We suggest that the observed net heterotrophy in these lakes was a result of the oligotrophic conditions and hence low primary production in combination with an input of allochthonous C with a relatively high availability. 4. Mixotrophic phytoplankton (Cryptomonas spp., Dinobryon spp. and flagellates cf. Ochromonas spp.) constituted a large percentage of the plankton community (17–83%), possibly as a result of their capacity to exploit bacteria as a means of acquiring nutrients in these nutrient poor systems. |
format |
Article in Journal/Newspaper |
author |
Pålsson, Carina Kritzberg, Emma Christoffersen, K Granéli, Wilhelm |
author_facet |
Pålsson, Carina Kritzberg, Emma Christoffersen, K Granéli, Wilhelm |
author_sort |
Pålsson, Carina |
title |
Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton |
title_short |
Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton |
title_full |
Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton |
title_fullStr |
Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton |
title_full_unstemmed |
Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton |
title_sort |
net heterotrophy in faroe islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton |
publisher |
Wiley-Blackwell |
publishDate |
2005 |
url |
https://lup.lub.lu.se/record/150649 https://doi.org/10.1111/j.1365-2427.2005.01440.x |
geographic |
Faroe Islands |
geographic_facet |
Faroe Islands |
genre |
Faroe Islands |
genre_facet |
Faroe Islands |
op_source |
Freshwater Biology; 50(12), pp 2011-2020 (2005) ISSN: 0046-5070 |
op_relation |
https://lup.lub.lu.se/record/150649 http://dx.doi.org/10.1111/j.1365-2427.2005.01440.x wos:000233290000009 scopus:33745208799 |
op_doi |
https://doi.org/10.1111/j.1365-2427.2005.01440.x |
container_title |
Freshwater Biology |
container_volume |
50 |
container_issue |
12 |
container_start_page |
2011 |
op_container_end_page |
2020 |
_version_ |
1765995784581414912 |