{"NOAAStudyId":"22392","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2017-07-15","dataPublisher":"NOAA","dataType":"PALEOCEANOGRAPHY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-22392.xml","doi":null,"earliestYearBP":52900,"earliestYearCE":-50950,"entryId":"noaa-ocean-22392","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"MGG-1357017, OCE-0939564, OCE-0634731"}],"investigators":"Orsi, W.D.; Coolen, M.J.L.; Wuchter, C.; He, L.; More, K.D.; Irigoien, X.; Chust, G.; Johnson, C.; Hemingway, J.D.; Lee, M.; Galy, V.V.; Giosan, L.","mostRecentYearBP":330,"mostRecentYearCE":1620,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22392","originalSource":null,"publication":[{"abstract":"Selection of microorganisms in marine sediment is shaped by energy-yielding electron acceptors for respiration that are depleted in vertical succession. However, some taxa have been reported to reflect past depositional conditions suggesting they have experienced weak selection after burial. In sediments underlying the Arabian Sea oxygen minimum zone (OMZ), we performed the first metagenomic profiling of sedimentary DNA at centennial-scale resolution in the context of a multi-proxy paleoclimate reconstruction. While vertical distributions of sulfate reducing bacteria and methanogens indicate energy-based selection typical of anoxic marine sediments, 5-15% of taxa per sample exhibit depthindependent stratigraphies indicative of paleoenvironmental selection over relatively short geological timescales. Despite being vertically separated, indicator taxa deposited under OMZ conditions were more similar to one another than those deposited in bioturbated intervals under intervening higher oxygen. The genomic potential for denitrification also correlated with palaeo-OMZ proxies, independent of sediment depth and available nitrate and nitrite. However, metagenomes revealed mixed acid and Entner-Dourdoroff fermentation pathways encoded by many of the same denitrifier groups. Fermentation thus may explain the subsistence of these facultatively anaerobic microbes whose stratigraphy follows changing paleoceanographic conditions. At least for certain taxa, our analysis provides evidence of their paleoenvironmental selection over the last glacial-interglacial cycle.","author":{"name":"Orsi, W.D.; Coolen, M.J.L; Wuchter, C.; He, L.; More, K.D.; Irigoien, X.; Chust, G.; Johnson, C.; Hemingway, J.D.; Lee, M.; Galy, V.; Giosan, L."},"citation":"Orsi, W.D.; Coolen, M.J.L; Wuchter, C.; He, L.; More, K.D.; Irigoien, X.; Chust, G.; Johnson, C.; Hemingway, J.D.; Lee, M.; Galy, V.; Giosan, L. 2017. Climate oscillations reflected within the microbiome of Arabian Sea sediments. Scientific Reports, 7. doi: 10.1038/s41598-017-05590-9","edition":null,"identifier":{"id":"10.1038/s41598-017-05590-9","type":"doi","url":"http://dx.doi.org/10.1038/s41598-017-05590-9"},"issue":null,"journal":"Scientific Reports","pages":null,"pubRank":"1","pubYear":2017,"reportNumber":null,"title":"Climate oscillations reflected within the microbiome of Arabian Sea sediments","type":"publication","volume":"7"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57344","geo":{"geoType":"Feature","geometry":{"coordinates":["23.121667","66.496667"],"type":"POINT"},"properties":{"easternmostLongitude":"66.496667","maxElevationMeters":"-566","minElevationMeters":"-566","northernmostLatitude":"23.121667","southernmostLatitude":"23.121667","westernmostLongitude":"66.496667"}},"locationName":"Ocean>Indian Ocean>Arabian Sea","mappable":"Y","paleoData":[{"NOAADataTableId":"33504","coreLengthMeters":13,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>age 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with corresponding depth and age of samples measured\n  Provided Keywords: oxygen minimum zone, alkenone, sea surface temperature ","version":"1.0","xmlId":"20518"}