Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton
Udgivelsesdato: December 2005 1. Five oligotrophic clear-water lakes on the Faroe Islands were studied during August 2000. Algal and bacterial production rates, community respiration, and CO 2 saturation were determined. In addition, we examined the plankton community composition (phytoplankton and...
Published in: | Freshwater Biology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2005
|
Subjects: | |
Online Access: | https://curis.ku.dk/portal/da/publications/net-heterotrophy-in-faroe-islands-clearwater-lakes-causes-and-consequences-for-bacterioplankton-and-phytoplankton(30bda020-74c3-11db-bee9-02004c4f4f50).html https://doi.org/10.1111/j.1365-2427.2005.01440.x |
id |
ftcopenhagenunip:oai:pure.atira.dk:publications/30bda020-74c3-11db-bee9-02004c4f4f50 |
---|---|
record_format |
openpolar |
spelling |
ftcopenhagenunip:oai:pure.atira.dk:publications/30bda020-74c3-11db-bee9-02004c4f4f50 2023-06-18T03:40:33+02:00 Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton Pålsson, C. Kritzberg, E. S. Christoffersen, K. Granéli, W. 2005 https://curis.ku.dk/portal/da/publications/net-heterotrophy-in-faroe-islands-clearwater-lakes-causes-and-consequences-for-bacterioplankton-and-phytoplankton(30bda020-74c3-11db-bee9-02004c4f4f50).html https://doi.org/10.1111/j.1365-2427.2005.01440.x eng eng info:eu-repo/semantics/restrictedAccess Pålsson , C , Kritzberg , E S , Christoffersen , K & Granéli , W 2005 , ' Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton ' , Freshwater Biology , vol. 50 , no. 12 , pp. 2011-2020 . https://doi.org/10.1111/j.1365-2427.2005.01440.x article 2005 ftcopenhagenunip https://doi.org/10.1111/j.1365-2427.2005.01440.x 2023-06-07T23:04:46Z Udgivelsesdato: December 2005 1. Five oligotrophic clear-water lakes on the Faroe Islands were studied during August 2000. Algal and bacterial production rates, community respiration, and CO 2 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 CO 2 (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 University of Copenhagen: Research Faroe Islands Freshwater Biology 50 12 2011 2020 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Udgivelsesdato: December 2005 1. Five oligotrophic clear-water lakes on the Faroe Islands were studied during August 2000. Algal and bacterial production rates, community respiration, and CO 2 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 CO 2 (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, C. Kritzberg, E. S. Christoffersen, K. Granéli, W. |
spellingShingle |
Pålsson, C. Kritzberg, E. S. Christoffersen, K. Granéli, W. Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton |
author_facet |
Pålsson, C. Kritzberg, E. S. Christoffersen, K. Granéli, W. |
author_sort |
Pålsson, C. |
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 |
publishDate |
2005 |
url |
https://curis.ku.dk/portal/da/publications/net-heterotrophy-in-faroe-islands-clearwater-lakes-causes-and-consequences-for-bacterioplankton-and-phytoplankton(30bda020-74c3-11db-bee9-02004c4f4f50).html 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 |
Pålsson , C , Kritzberg , E S , Christoffersen , K & Granéli , W 2005 , ' Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton ' , Freshwater Biology , vol. 50 , no. 12 , pp. 2011-2020 . https://doi.org/10.1111/j.1365-2427.2005.01440.x |
op_rights |
info:eu-repo/semantics/restrictedAccess |
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_ |
1769005724356050944 |