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dc.contributor.authorAmsler, Charles D.
dc.contributor.authorAmsler, Margaret O.
dc.contributor.authorKlein, Andrew
dc.contributor.authorGalloway, Aaron W. E.
dc.contributor.authorIken, Katrin
dc.contributor.authorMcClintock, James B.
dc.contributor.authorHeiser, Sabrina
dc.contributor.authorLowe, Alex T.
dc.contributor.authorSchram, Julie
dc.contributor.authorWhippo, Ross
dc.date.accessioned2024-02-07T22:35:14Z
dc.date.available2024-02-07T22:35:14Z
dc.date.issued2023-11
dc.identifier.citationAmsler, C. D., Amsler, M. O., Klein, A. G., Galloway, A. W., Iken, K., McClintock, J. B., Schram, J. B., ... & Whippo, R. (2023). Strong correlations of sea ice cover with macroalgal cover along the Antarctic Peninsula: Ramifications for present and future benthic communities. Elementa: Science of the Anthropocene, 11(1). https://doi.org/10.1525/elementa.2023.00020en_US
dc.identifier.issn2325-1026
dc.identifier.urihttp://hdl.handle.net/11122/14838
dc.description.abstractMacroalgal forests dominate shallow hard bottom areas along the northern portion of the Western Antarctic Peninsula (WAP). Macroalgal biomass and diversity are known to be dramatically lower in the southern WAP and at similar latitudes around Antarctica, but few reports detail the distributions of macroalgae or associated macroinvertebrates in the central WAP. We used satellite imagery to identify 14 sites differing in sea ice coverage but similar in terms of turbidity along the central WAP. Fleshy macroalgal cover was strongly, negatively correlated with ice concentration, but there was no significant correlation between macroinvertebrate cover and sea ice. Overall community (all organisms) diversity correlated negatively with sea ice concentration and positively with fleshy macroalgal cover, which ranged from around zero at high ice sites to 80% at the lowest ice sites. Nonparametric, multivariate analyses resulted in clustering of macroalgal assemblages across most of the northern sites of the study area, although they differed greatly with respect to macroalgal percent cover and diversity. Analyses of the overall communities resulted in three site clusters corresponding to high, medium, and low fleshy macroalgal cover. At most northern sites, macroalgal cover was similar across depths, but macroalgal and macroinvertebrate distributions suggested increasing effects of ice scour in shallower depths towards the south. Hindcast projections based on correlations of ice and macroalgal cover data suggest that macroalgal cover at many sites could have been varying substantially over the past 40 years. Similarly, based on predicted likely sea ice decreases by 2100, projected increases in macroalgal cover at sites that currently have high ice cover and low macroalgal cover are substantial, often with only a future 15% decrease in sea ice. Such changes would have important ramifications to future benthic communities and to understanding how Antarctic macroalgae may contribute to future blue carbon sequestration.en_US
dc.description.sponsorshipNational Science Foundation. Antarctic Organisms and Ecosystems Program.en_US
dc.description.tableofcontentsAbstract -- 1. Introduction -- 2. Methods -- 3. Results -- 4. Discussion -- 5. Conclusions -- Data Accessibility Statement -- Supplemental Files -- Acknowledgments -- Funding -- Competing Interests -- Author Contributions -- References -- Supplementary Data.en_US
dc.language.isoen_USen_US
dc.publisherUniversity of California Pressen_US
dc.subjectbenthic ecologyen_US
dc.subjectclimate changeen_US
dc.subjectdepth distributionen_US
dc.subjectice scouren_US
dc.subjectpolar ecosystemsen_US
dc.subjectsea iceen_US
dc.subjectocean scienceen_US
dc.titleStrong correlations of sea ice cover with macroalgal cover along the Antarctic Peninsula: Ramifications for present and future benthic communitiesen_US
dc.typeArticleen_US
dc.description.peerreviewYesen_US
refterms.dateFOA2024-02-07T22:35:16Z
dc.identifier.journalElementa: Science of the Anthropoceneen_US


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