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A suboxic chlorophyll-a maximum persists within the Pacific oxygen minimum zone off Mexico
The tropical Oxygen Minimum Zones (OMZ) are known to shelter a chlorophyll-a maximum (CM) within suboxic waters ( - 25 m year-round, which suggests that persistent low-light levels allow development of the suboxic-CM. The persistence of the suboxic-CM is consistent with its association with a stable...
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Published in: | Deep-sea research. Part II, Topical studies in oceanography Topical studies in oceanography, 2019-11, Vol.169-170, p.104686, Article 104686 |
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container_start_page | 104686 |
container_title | Deep-sea research. Part II, Topical studies in oceanography |
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creator | Márquez-Artavia, Amaru Sánchez-Velasco, Laura Barton, Eric D. Paulmier, Aurelién Santamarı́a-Del-Ángel, Eduardo Beier, Emilio |
description | The tropical Oxygen Minimum Zones (OMZ) are known to shelter a chlorophyll-a maximum (CM) within suboxic waters ( - 25 m year-round, which suggests that persistent low-light levels allow development of the suboxic-CM. The persistence of the suboxic-CM is consistent with its association with a stable microbial community. The effects on the ecosystem and biogeochemical cycles remain to be investigated. |
doi_str_mv | 10.1016/j.dsr2.2019.104686 |
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Here, 1161 chlorophyll-a fluorescence and oxygen profiles collected between 2003 and 2016 were used to describe statistically the physical situation in which the suboxic-CM was found. Results indicate that the suboxic-CM was a persistent feature at seasonal scale at depths between 40 and 190 m at an average density potential anomaly of 26 ± 0.2 kg m−3, related to the Subtropical Subsurface Water, which is nearly unaffected by mixing with other water masses. The suboxic-CM south of 21°N was generally associated with the upper limit of the suboxic waters of the OMZ. In this region, the distance between the suboxic waters and the euphotic zone (1% of surface irradiance) was > - 25 m year-round, which suggests that persistent low-light levels allow development of the suboxic-CM. The persistence of the suboxic-CM is consistent with its association with a stable microbial community. 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In this region, the distance between the suboxic waters and the euphotic zone (1% of surface irradiance) was > - 25 m year-round, which suggests that persistent low-light levels allow development of the suboxic-CM. The persistence of the suboxic-CM is consistent with its association with a stable microbial community. The effects on the ecosystem and biogeochemical cycles remain to be investigated.</description><subject>Chlorophyll maxima</subject><subject>Euphotic zone</subject><subject>Mexican Pacific</subject><subject>Persistence</subject><subject>Suboxia</subject><issn>0967-0645</issn><issn>1879-0100</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp9kMtOwzAQRS0EEqXwA6z8AyljJ3FiiU1V8ZJAsIANG8uxx8RVE1d2Ci1fT0pZs7rS1Zyr0SHkksGMARNXy5lNkc84MDkWhajFEZmwupIZMIBjMgEpqgxEUZ6Ss5SWAJDnQk7I-5ymTRO23lDTrkIM63a3WmWadnrru01H1xiTT0OiX35ofU-HFumLNt6NRNjuPrCnne9_T79DjzQ4R59w3Avn5MTpVcKLv5ySt9ub18V99vh897CYP2amKIohE6ZCaaXkTmsOzmrBYUyDpbWcSaGt0w60FKYpbVPpus45x7Iwum7KRrB8Svhh18SQUkSn1tF3Ou4UA7W3o5Zqb0ft7aiDnRG6PkA4fvbpMapkPPYGrY9oBmWD_w__AcVXb84</recordid><startdate>20191101</startdate><enddate>20191101</enddate><creator>Márquez-Artavia, Amaru</creator><creator>Sánchez-Velasco, Laura</creator><creator>Barton, Eric D.</creator><creator>Paulmier, Aurelién</creator><creator>Santamarı́a-Del-Ángel, Eduardo</creator><creator>Beier, Emilio</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20191101</creationdate><title>A suboxic chlorophyll-a maximum persists within the Pacific oxygen minimum zone off Mexico</title><author>Márquez-Artavia, Amaru ; Sánchez-Velasco, Laura ; Barton, Eric D. ; Paulmier, Aurelién ; Santamarı́a-Del-Ángel, Eduardo ; Beier, Emilio</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c444t-6c7e9d992faa20fda62020fce5dd2196adfaf0a96cb5db7a88322e54ca8b5b613</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Chlorophyll maxima</topic><topic>Euphotic zone</topic><topic>Mexican Pacific</topic><topic>Persistence</topic><topic>Suboxia</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Márquez-Artavia, Amaru</creatorcontrib><creatorcontrib>Sánchez-Velasco, Laura</creatorcontrib><creatorcontrib>Barton, Eric D.</creatorcontrib><creatorcontrib>Paulmier, Aurelién</creatorcontrib><creatorcontrib>Santamarı́a-Del-Ángel, Eduardo</creatorcontrib><creatorcontrib>Beier, Emilio</creatorcontrib><collection>CrossRef</collection><jtitle>Deep-sea research. 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source | ScienceDirect Journals |
subjects | Chlorophyll maxima Euphotic zone Mexican Pacific Persistence Suboxia |
title | A suboxic chlorophyll-a maximum persists within the Pacific oxygen minimum zone off Mexico |
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