Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters
Narrow annual ranges of temperature characterize polar waters. Consequently, small increases in temperature could significantly affect the metabolic processes of marine microorganisms. We investigated the response of bacterial heterotrophic production (BHP) and grazing rates to small temperature cha...
Published in: | Aquatic Microbial Ecology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Inter Research
2009
|
Subjects: | |
Online Access: | https://eprints.lincoln.ac.uk/id/eprint/16473/ https://eprints.lincoln.ac.uk/id/eprint/16473/1/vaque_etal_09.pdf http://www.int-res.com/articles/ame2009/54/a054p101.pdf https://doi.org/10.3354/ame01259 |
id |
ftulincoln:oai:eprints.lincoln.ac.uk:16473 |
---|---|
record_format |
openpolar |
spelling |
ftulincoln:oai:eprints.lincoln.ac.uk:16473 2023-05-15T13:44:15+02:00 Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters Vaque, Dolors Guadayol, Oscar Peters, Francesc Felipe, Jordi Malits, Andrea Pedros-Alio, Carlos 2009-01 application/pdf https://eprints.lincoln.ac.uk/id/eprint/16473/ https://eprints.lincoln.ac.uk/id/eprint/16473/1/vaque_etal_09.pdf http://www.int-res.com/articles/ame2009/54/a054p101.pdf https://doi.org/10.3354/ame01259 en eng Inter Research https://eprints.lincoln.ac.uk/id/eprint/16473/1/vaque_etal_09.pdf Vaque, Dolors, Guadayol, Oscar, Peters, Francesc, Felipe, Jordi, Malits, Andrea and Pedros-Alio, Carlos (2009) Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters. Aquatic Microbial Ecology, 54 (1). pp. 101-112. ISSN 0948-3055 doi:10.3354/ame01259 C180 Ecology F700 Ocean Sciences C500 Microbiology Article PeerReviewed 2009 ftulincoln https://doi.org/10.3354/ame01259 2022-03-02T20:03:37Z Narrow annual ranges of temperature characterize polar waters. Consequently, small increases in temperature could significantly affect the metabolic processes of marine microorganisms. We investigated the response of bacterial heterotrophic production (BHP) and grazing rates to small temperature changes in 3 zones near the western Antarctic Peninsula-Bransfield and Gerlache Straits, and Bellingshausen Sea-during December 2002. We performed 8 grazing experiments with water samples collected from depths where chlorophyll a (chl a) concentration was maximum, and incubated the samples at ambient temperature and at -1, 1, 2 and 5 degrees C. We expected that grazing would increase in parallel with BHP at increasing temperatures; however, temperature differentially affected these 2 microbial activities. Thus, grazing rates increased maximally at temperatures <= 2 degrees C, except in 1 station in the Gerlache Strait, while BHP increased maximally at temperatures <= 2 degrees C, except in 1 station in the Bellingshausen Sea. The percentage of grazed bacteria to BHP at the highest experimental temperatures was low (56 +/- 19%) in the Gerlache Strait, high (395 +/- 137%) in the Bransfield Strait and approximately balanced (97 +/- 24%) in the Bellingshausen Sea. This suggests that differential microbial processes in each zone at increasing temperatures will also depend on the autochthonous community. The present study contributes to the understanding of the variability of polar biogeochemical fluxes, and may aid in predicting the response of microorganisms in future scenarios with local and seasonal changes in temperature. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Bransfield Strait University of Lincoln: Lincoln Repository Antarctic Antarctic Peninsula Bellingshausen Sea Bransfield Strait Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Gerlache Strait ENVELOPE(-62.333,-62.333,-64.500,-64.500) Aquatic Microbial Ecology 54 101 112 |
institution |
Open Polar |
collection |
University of Lincoln: Lincoln Repository |
op_collection_id |
ftulincoln |
language |
English |
topic |
C180 Ecology F700 Ocean Sciences C500 Microbiology |
spellingShingle |
C180 Ecology F700 Ocean Sciences C500 Microbiology Vaque, Dolors Guadayol, Oscar Peters, Francesc Felipe, Jordi Malits, Andrea Pedros-Alio, Carlos Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters |
topic_facet |
C180 Ecology F700 Ocean Sciences C500 Microbiology |
description |
Narrow annual ranges of temperature characterize polar waters. Consequently, small increases in temperature could significantly affect the metabolic processes of marine microorganisms. We investigated the response of bacterial heterotrophic production (BHP) and grazing rates to small temperature changes in 3 zones near the western Antarctic Peninsula-Bransfield and Gerlache Straits, and Bellingshausen Sea-during December 2002. We performed 8 grazing experiments with water samples collected from depths where chlorophyll a (chl a) concentration was maximum, and incubated the samples at ambient temperature and at -1, 1, 2 and 5 degrees C. We expected that grazing would increase in parallel with BHP at increasing temperatures; however, temperature differentially affected these 2 microbial activities. Thus, grazing rates increased maximally at temperatures <= 2 degrees C, except in 1 station in the Gerlache Strait, while BHP increased maximally at temperatures <= 2 degrees C, except in 1 station in the Bellingshausen Sea. The percentage of grazed bacteria to BHP at the highest experimental temperatures was low (56 +/- 19%) in the Gerlache Strait, high (395 +/- 137%) in the Bransfield Strait and approximately balanced (97 +/- 24%) in the Bellingshausen Sea. This suggests that differential microbial processes in each zone at increasing temperatures will also depend on the autochthonous community. The present study contributes to the understanding of the variability of polar biogeochemical fluxes, and may aid in predicting the response of microorganisms in future scenarios with local and seasonal changes in temperature. |
format |
Article in Journal/Newspaper |
author |
Vaque, Dolors Guadayol, Oscar Peters, Francesc Felipe, Jordi Malits, Andrea Pedros-Alio, Carlos |
author_facet |
Vaque, Dolors Guadayol, Oscar Peters, Francesc Felipe, Jordi Malits, Andrea Pedros-Alio, Carlos |
author_sort |
Vaque, Dolors |
title |
Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters |
title_short |
Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters |
title_full |
Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters |
title_fullStr |
Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters |
title_full_unstemmed |
Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters |
title_sort |
differential response of grazing and bacterial heterotrophic production to experimental warming in antarctic waters |
publisher |
Inter Research |
publishDate |
2009 |
url |
https://eprints.lincoln.ac.uk/id/eprint/16473/ https://eprints.lincoln.ac.uk/id/eprint/16473/1/vaque_etal_09.pdf http://www.int-res.com/articles/ame2009/54/a054p101.pdf https://doi.org/10.3354/ame01259 |
long_lat |
ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-62.333,-62.333,-64.500,-64.500) |
geographic |
Antarctic Antarctic Peninsula Bellingshausen Sea Bransfield Strait Gerlache Gerlache Strait |
geographic_facet |
Antarctic Antarctic Peninsula Bellingshausen Sea Bransfield Strait Gerlache Gerlache Strait |
genre |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Bransfield Strait |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Bransfield Strait |
op_relation |
https://eprints.lincoln.ac.uk/id/eprint/16473/1/vaque_etal_09.pdf Vaque, Dolors, Guadayol, Oscar, Peters, Francesc, Felipe, Jordi, Malits, Andrea and Pedros-Alio, Carlos (2009) Differential response of grazing and bacterial heterotrophic production to experimental warming in Antarctic waters. Aquatic Microbial Ecology, 54 (1). pp. 101-112. ISSN 0948-3055 doi:10.3354/ame01259 |
op_doi |
https://doi.org/10.3354/ame01259 |
container_title |
Aquatic Microbial Ecology |
container_volume |
54 |
container_start_page |
101 |
op_container_end_page |
112 |
_version_ |
1766199468181422080 |