dc.contributor.author | Lin, Yun-Chi | |
dc.contributor.author | Worden, Alexandra Z. | |
dc.contributor.author | Clayton, Sophie A | |
dc.contributor.author | Follows, Michael J | |
dc.date.accessioned | 2018-10-22T15:04:50Z | |
dc.date.available | 2018-10-22T15:04:50Z | |
dc.date.issued | 2016-09 | |
dc.identifier.issn | 0024-3590 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/118641 | |
dc.description.abstract | Western boundary currents support high primary production and carbon export. Here, we performed a survey of photosynthetic picoeukaryotes in the North Pacific Ocean in four transects crossing the Kuroshio Front. Prasinophyte algae comprised 85% of 18S rRNA gene sequences for photosynthetic taxa in the <5 μm size fraction. The picoplanktonic (<2 μm) genera Micromonas and Ostreococcus comprised 30% and 51% of the total photosynthetic 18S rDNA sequences from five stations. Phylogenetic analysis showed that two Ostreococcus ecotypes, until now rarely found to co-occur, were both present in the majority of samples. Ostreococcus ecotype OI reached 6,830 ± 343 gene copies mL[superscript −1], while Ostreococcus ecotype OII reached 50,190 ± 971 gene copies mL−1based on qPCR analysis of the 18S rRNA gene. These values are higher than in studies of other oceanographic regions by a factor of 10 for OII. The data suggest that meso- and finer-scale physical dynamics had a significant impact on the populations at the front, either by mingling ecotypes from different source regions at fine scales (∼10s km) or by stimulating their growth through vertical nutrient injections. We investigate this hypothesis with an idealized diffusion-reaction model, and find that only a combination of mixing and positive net growth can explain the observed distributions and overlap of the two Ostreococcus ecotypes. Our field observations support larger-scale numerical ocean simulations that predict enhanced biodiversity at western boundary current fronts, and suggest a strategy for systematically testing that hypothesis. | en_US |
dc.description.sponsorship | National Science Foundation (U.S.). Division of Ocean Sciences (1048926) | en_US |
dc.description.sponsorship | Gordon and Betty Moore Foundation (GBMF3778) | en_US |
dc.description.sponsorship | MISTI (Hayashi Seed Fund) | en_US |
dc.description.sponsorship | Massachusetts Institute of Technology. Undergraduate Research Opportunities Program | en_US |
dc.description.sponsorship | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences. Henry Houghton Fund | en_US |
dc.description.sponsorship | Simons Foundation. Simons Collaboration on Ocean Processes and Ecology | en_US |
dc.publisher | Wiley | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1002/LNO.10373 | en_US |
dc.rights | Creative Commons Attribution 4.0 International License | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_US |
dc.source | Association for the Sciences of Limnology and Oceanography (ASLO) | en_US |
dc.title | Co-existence of distinct Ostreococcus ecotypes at an oceanic front | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Clayton, Sophie, et al. “Co-Existence of Distinct Ostreococcus Ecotypes at an Oceanic Front: Ocean Fronts Promote Biodiversity.” Limnology and Oceanography, vol. 62, no. 1, Jan. 2017, pp. 75–88. © 2016 The Authors | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences | en_US |
dc.contributor.mitauthor | Clayton, Sophie A | |
dc.contributor.mitauthor | Follows, Michael J | |
dc.relation.journal | Limnology and Oceanography | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dc.date.updated | 2018-09-24T17:25:05Z | |
dspace.orderedauthors | Clayton, Sophie; Lin, Yun-Chi; Follows, Michael J.; Worden, Alexandra Z. | en_US |
dspace.embargo.terms | N | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-3102-0341 | |
mit.license | PUBLISHER_CC | en_US |