Nitrogen isotopic composition of planktonic foraminifera from the modern ocean and recent sediments
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چکیده
منابع مشابه
Chromium isotopic composition of core-top planktonic foraminifera.
The chromium isotope system (53 Cr/52 Cr expressed as δ53 Cr relative to NIST SRM 979) is potentially a powerful proxy for the redox state of the ocean-atmosphere system, but a lack of temporally continuous, well-calibrated archives has limited its application to date. Marine carbonates could potentially serve as a common and continuous Cr isotope archive. Here, we present the first evaluation ...
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Laboratory experiments with the planktonic foraminifera Globigerina bulloides (nonsymbiotic) and Orbulina universa (symbiotic) were carried out to examine the effects of temperature, irradiance (symbiont photosynthesis), [CO 3 ], and ontogeny on shell δ13C values. In ambient seawater ([CO 3 ] D 171 μmol kg 1), the δ13C of G. bulloides shells decreases 0.11‰ oC , a pattern that likely results fr...
متن کاملEnvironmental Predictors of Diversity in Recent Planktonic Foraminifera as Recorded in Marine Sediments
Global diversity patterns are thought to result from a combination of environmental and historical factors. This study tests the set of ecological and evolutionary hypotheses proposed to explain the global variation in present-day coretop diversity in the macroperforate planktonic foraminifera, a clade with an exceptional fossil record. Within this group, marine surface sediment assemblages are...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 2012
ISSN: 0024-3590
DOI: 10.4319/lo.2012.57.4.1011