Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic)
The effects of nutrient availability and quality of dissolved organic carbon (DOC) on bacterioplankton production were assessed in six lakes with differing frequencies of river flooding. Bacterial productivity, dissolved nutrients, and DOC were tracked weekly throughout the open-water period of 2001...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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ftnerc:oai:nora.nerc.ac.uk:472 2024-06-09T07:42:25+00:00 Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic) Spears, Bryan Lesack, Lance F.W. 2006 http://nora.nerc.ac.uk/id/eprint/472/ http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_abst_e?cjfas_f05-264_63_ns_nf_cjfas4-06 https://doi.org/10.1139/F05-264 unknown Spears, Bryan orcid:0000-0002-0876-0405 Lesack, Lance F.W. 2006 Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic). Canadian Journal of Fisheries and Aquatic Sciences, 63 (4). 845-857. https://doi.org/10.1139/F05-264 <https://doi.org/10.1139/F05-264> Biology and Microbiology Ecology and Environment Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1139/F05-264 2024-05-15T08:39:04Z The effects of nutrient availability and quality of dissolved organic carbon (DOC) on bacterioplankton production were assessed in six lakes with differing frequencies of river flooding. Bacterial productivity, dissolved nutrients, and DOC were tracked weekly throughout the open-water period of 2001. Inorganic nutrient (N and P) enrichment microcosm experiments were conducted to directly assess the effects of DOC quality (i.e., mixtures of colored and noncolored DOC) and inorganic nutrient limitation on bacterial productivity among the lakes. Averaged over the open-water season, both abundance and production of bacterioplankton increased with decreasing flood frequency (R2 = 0.61 and R2 = 0.78, respectively). Reduced bacterial production occurred in frequently flooded lakes, where colored DOC, light attenuation, and phosphate were high but ammonium was low. Bacterial production was greatest in infrequently flooded lakes, where noncolored DOC and ammonium were high but phosphate was low. Bacterial production was enhanced by amendments of inorganic nutrients in duplicate experiments (two-factor analyses of variance). Production was also enhanced in response to higher concentrations of either colored or noncolored DOC following release from inorganic nutrient limitation. Size fractionated (<1 µm versus >1 µm) N-debt and P-debt bioassays typically showed demand for P and release of N by bacteria in all study lakes. Article in Journal/Newspaper Arctic Arctic Mackenzie Delta Natural Environment Research Council: NERC Open Research Archive Arctic Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Canadian Journal of Fisheries and Aquatic Sciences 63 4 845 857 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Biology and Microbiology Ecology and Environment |
spellingShingle |
Biology and Microbiology Ecology and Environment Spears, Bryan Lesack, Lance F.W. Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic) |
topic_facet |
Biology and Microbiology Ecology and Environment |
description |
The effects of nutrient availability and quality of dissolved organic carbon (DOC) on bacterioplankton production were assessed in six lakes with differing frequencies of river flooding. Bacterial productivity, dissolved nutrients, and DOC were tracked weekly throughout the open-water period of 2001. Inorganic nutrient (N and P) enrichment microcosm experiments were conducted to directly assess the effects of DOC quality (i.e., mixtures of colored and noncolored DOC) and inorganic nutrient limitation on bacterial productivity among the lakes. Averaged over the open-water season, both abundance and production of bacterioplankton increased with decreasing flood frequency (R2 = 0.61 and R2 = 0.78, respectively). Reduced bacterial production occurred in frequently flooded lakes, where colored DOC, light attenuation, and phosphate were high but ammonium was low. Bacterial production was greatest in infrequently flooded lakes, where noncolored DOC and ammonium were high but phosphate was low. Bacterial production was enhanced by amendments of inorganic nutrients in duplicate experiments (two-factor analyses of variance). Production was also enhanced in response to higher concentrations of either colored or noncolored DOC following release from inorganic nutrient limitation. Size fractionated (<1 µm versus >1 µm) N-debt and P-debt bioassays typically showed demand for P and release of N by bacteria in all study lakes. |
format |
Article in Journal/Newspaper |
author |
Spears, Bryan Lesack, Lance F.W. |
author_facet |
Spears, Bryan Lesack, Lance F.W. |
author_sort |
Spears, Bryan |
title |
Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic) |
title_short |
Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic) |
title_full |
Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic) |
title_fullStr |
Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic) |
title_full_unstemmed |
Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic) |
title_sort |
bacterioplankton production, abundance, and nutrient limitation among lakes of the mackenzie delta (western canadian arctic) |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/472/ http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_abst_e?cjfas_f05-264_63_ns_nf_cjfas4-06 https://doi.org/10.1139/F05-264 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Arctic Mackenzie Delta |
geographic_facet |
Arctic Mackenzie Delta |
genre |
Arctic Arctic Mackenzie Delta |
genre_facet |
Arctic Arctic Mackenzie Delta |
op_relation |
Spears, Bryan orcid:0000-0002-0876-0405 Lesack, Lance F.W. 2006 Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (Western Canadian arctic). Canadian Journal of Fisheries and Aquatic Sciences, 63 (4). 845-857. https://doi.org/10.1139/F05-264 <https://doi.org/10.1139/F05-264> |
op_doi |
https://doi.org/10.1139/F05-264 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
63 |
container_issue |
4 |
container_start_page |
845 |
op_container_end_page |
857 |
_version_ |
1801371291881570304 |