Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula.
Seasonal cycles within the marginal ice zones in polar regions include large shifts in temperature and salinity that strongly influence microbial abundance and physiology. However, the combined effects of concurrent temperature and salinity change on microbial community structure and biochemical com...
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ftcdlib:oai:escholarship.org:ark:/13030/qt9z83507n 2023-11-12T04:08:30+01:00 Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula. Dawson, H Connors, E Erazo, N Sacks, J Mierzejewski, V Rundell, S Carlson, L Deming, J Ingalls, A Young, J Bowman, Jeff 2023-11-01 application/pdf https://escholarship.org/uc/item/9z83507n unknown eScholarship, University of California qt9z83507n https://escholarship.org/uc/item/9z83507n public The ISME Journal, vol 17, iss 11 Temperature Antarctic Regions Salinity Ecosystem Seawater Particulate Matter Ice Cover article 2023 ftcdlib 2023-10-30T19:04:42Z Seasonal cycles within the marginal ice zones in polar regions include large shifts in temperature and salinity that strongly influence microbial abundance and physiology. However, the combined effects of concurrent temperature and salinity change on microbial community structure and biochemical composition during transitions between seawater and sea ice are not well understood. Coastal marine communities along the western Antarctic Peninsula were sampled and surface seawater was incubated at combinations of temperature and salinity mimicking the formation (cold, salty) and melting (warm, fresh) of sea ice to evaluate how these factors may shape community composition and particulate metabolite pools during seasonal transitions. Bacterial and algal community structures were tightly coupled to each other and distinct across sea-ice, seawater, and sea-ice-meltwater field samples, with unique metabolite profiles in each habitat. During short-term (approximately 10-day) incubations of seawater microbial communities under different temperature and salinity conditions, community compositions changed minimally while metabolite pools shifted greatly, strongly accumulating compatible solutes like proline and glycine betaine under cold and salty conditions. Lower salinities reduced total metabolite concentrations in particulate matter, which may indicate a release of metabolites into the labile dissolved organic matter pool. Low salinity also increased acylcarnitine concentrations in particulate matter, suggesting a potential for fatty acid degradation and reduced nutritional value at the base of the food web during freshening. Our findings have consequences for food web dynamics, microbial interactions, and carbon cycling as polar regions undergo rapid climate change. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Sea ice University of California: eScholarship |
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Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Temperature Antarctic Regions Salinity Ecosystem Seawater Particulate Matter Ice Cover |
spellingShingle |
Temperature Antarctic Regions Salinity Ecosystem Seawater Particulate Matter Ice Cover Dawson, H Connors, E Erazo, N Sacks, J Mierzejewski, V Rundell, S Carlson, L Deming, J Ingalls, A Young, J Bowman, Jeff Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula. |
topic_facet |
Temperature Antarctic Regions Salinity Ecosystem Seawater Particulate Matter Ice Cover |
description |
Seasonal cycles within the marginal ice zones in polar regions include large shifts in temperature and salinity that strongly influence microbial abundance and physiology. However, the combined effects of concurrent temperature and salinity change on microbial community structure and biochemical composition during transitions between seawater and sea ice are not well understood. Coastal marine communities along the western Antarctic Peninsula were sampled and surface seawater was incubated at combinations of temperature and salinity mimicking the formation (cold, salty) and melting (warm, fresh) of sea ice to evaluate how these factors may shape community composition and particulate metabolite pools during seasonal transitions. Bacterial and algal community structures were tightly coupled to each other and distinct across sea-ice, seawater, and sea-ice-meltwater field samples, with unique metabolite profiles in each habitat. During short-term (approximately 10-day) incubations of seawater microbial communities under different temperature and salinity conditions, community compositions changed minimally while metabolite pools shifted greatly, strongly accumulating compatible solutes like proline and glycine betaine under cold and salty conditions. Lower salinities reduced total metabolite concentrations in particulate matter, which may indicate a release of metabolites into the labile dissolved organic matter pool. Low salinity also increased acylcarnitine concentrations in particulate matter, suggesting a potential for fatty acid degradation and reduced nutritional value at the base of the food web during freshening. Our findings have consequences for food web dynamics, microbial interactions, and carbon cycling as polar regions undergo rapid climate change. |
format |
Article in Journal/Newspaper |
author |
Dawson, H Connors, E Erazo, N Sacks, J Mierzejewski, V Rundell, S Carlson, L Deming, J Ingalls, A Young, J Bowman, Jeff |
author_facet |
Dawson, H Connors, E Erazo, N Sacks, J Mierzejewski, V Rundell, S Carlson, L Deming, J Ingalls, A Young, J Bowman, Jeff |
author_sort |
Dawson, H |
title |
Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula. |
title_short |
Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula. |
title_full |
Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula. |
title_fullStr |
Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula. |
title_full_unstemmed |
Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula. |
title_sort |
microbial metabolomic responses to changes in temperature and salinity along the western antarctic peninsula. |
publisher |
eScholarship, University of California |
publishDate |
2023 |
url |
https://escholarship.org/uc/item/9z83507n |
genre |
Antarc* Antarctic Antarctic Peninsula Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Sea ice |
op_source |
The ISME Journal, vol 17, iss 11 |
op_relation |
qt9z83507n https://escholarship.org/uc/item/9z83507n |
op_rights |
public |
_version_ |
1782328791054417920 |