Summary of project PR001635

This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench,, where it has been assigned Project ID PR001635. The data can be accessed directly via it's Project DOI: 10.21228/M8C42F This work is supported by NIH grant, U2C- DK119886.


Project ID: PR001635
Project DOI:doi: 10.21228/M8C42F
Project Title:Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula.
Project Type:Marine Metabolomics
Project Summary: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.
Institute:University of Washington, School of Oceanography
Department:School of Oceanography
Laboratory:Young Lab
Last Name:Dawson
First Name:Hannah
Address:1501 NE Boat St, Seattle, WA, 98195, USA
Funding Source:National Science Foundation
Publications:Dawson et al., in review ISME Journal 2023

Summary of all studies in project PR001635

Study IDStudy TitleSpeciesInstituteAnalysis
(* : Contains Untargted data)
(* : Contains raw data)
ST002539 Microbial metabolomic responses to changes in temperature and salinity along the western Antarctic Peninsula. University of Washington, School of Oceanography MS 2023-05-25 1 71 Uploaded data (14.1G)*