{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T22:05:27Z","timestamp":1774389927683,"version":"3.50.1"},"reference-count":68,"publisher":"Copernicus GmbH","issue":"9","license":[{"start":{"date-parts":[[2016,5,10]],"date-time":"2016-05-10T00:00:00Z","timestamp":1462838400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"funder":[{"DOI":"10.13039\/501100004794","name":"Centre National de la Recherche Scientifique","doi-asserted-by":"publisher","award":["no grant number"],"award-info":[{"award-number":["no grant number"]}],"id":[{"id":"10.13039\/501100004794","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biogeosciences"],"abstract":"<jats:p>Abstract. Some benthic foraminifera have the ability to incorporate functional chloroplasts from diatoms (kleptoplasty). Our objective was to investigate chloroplast functionality of two benthic foraminifera (Haynesina germanica and Ammonia tepida) exposed to different irradiance levels (0, 25, 70\u202f\u00b5mol\u202fphoton\u202fm\u22122\u202fs\u22121) using spectral reflectance, epifluorescence observations, oxygen evolution and pulse amplitude modulated (PAM) fluorometry (maximum photosystem II quantum efficiency (Fv\/Fm) and rapid light curves (RLC)). Our results clearly showed that H. germanica was capable of using its kleptoplasts for more than 1\u202fweek while A. tepida showed very limited kleptoplastic ability with maximum photosystem II quantum efficiency (Fv\/Fm\u202f\u2009=\u2009\u202f0.4), much lower than H. germanica and decreasing to zero in only 1\u202fday. Only H. germanica showed net oxygen production with a compensation point at 24\u202f\u00b5mol\u202fphoton\u202fm\u22122\u202fs\u22121 and a production up to 1000\u202fpmol\u202fO2\u202fcell\u22121\u202fday\u22121 at 300\u202f\u00b5mol\u202fphoton\u202fm\u22122\u202fs\u22121. Haynesina germanica Fv\/Fm slowly decreased from 0.65 to 0.55 in 7\u202fdays when kept in darkness; however, it quickly decreased to 0.2 under high light. Kleptoplast functional time was thus estimated between 11 and 21\u202fdays in darkness and between 7 and 8\u202fdays at high light. These results emphasize that studies about foraminifera kleptoplasty must take into account light history. Additionally, this study showed that the kleptoplasts are unlikely to be completely functional, thus requiring continuous chloroplast resupply from foraminifera food source. The advantages of keeping functional chloroplasts are discussed but more information is needed to better understand foraminifera feeding strategies.<\/jats:p>","DOI":"10.5194\/bg-13-2715-2016","type":"journal-article","created":{"date-parts":[[2016,5,10]],"date-time":"2016-05-10T05:06:10Z","timestamp":1462856770000},"page":"2715-2726","source":"Crossref","is-referenced-by-count":56,"title":["Effect of light on photosynthetic efficiency of sequestered chloroplasts in  intertidal benthic foraminifera (\n                    <i>Haynesina germanica<\/i>\n                    and\n                    <i>Ammonia tepida<\/i>\n                    )"],"prefix":"10.5194","volume":"13","author":[{"given":"Thierry","family":"Jauffrais","sequence":"first","affiliation":[]},{"given":"Bruno","family":"Jesus","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5838-4540","authenticated-orcid":false,"given":"Edouard","family":"Metzger","sequence":"additional","affiliation":[]},{"given":"Jean-Luc","family":"Mouget","sequence":"additional","affiliation":[]},{"given":"Frans","family":"Jorissen","sequence":"additional","affiliation":[]},{"given":"Emmanuelle","family":"Geslin","sequence":"additional","affiliation":[]}],"member":"3145","published-online":{"date-parts":[[2016,5,10]]},"reference":[{"key":"ref1","doi-asserted-by":"crossref","unstructured":"Alve, E. and Murray, J. 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