Late Pleistocene-Holocene paleoproductivity circulation in the Japan Sea: sea-level control on δ13C and δ15N records of sediment organic material

Minoura, Koji; Hoshino, Koichi; Nakamura, Toshio; Wada, Eitaro

doi:10.1016/s0031-0182(97)00026-6

Cited by 59 publications

(47 citation statements)

References 15 publications

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“…Previous report working on organic matter in the sediment core issued that chronological variation of δ 13 C and δ 15 N should be attributed to the result of mixing with terrestrial and marine organic matters (Minoura et al, 1997). However our study lays emphasis that two considerable factors could be important for causing isotopic variations in sediment.…”

Section: Paleoceanographic Implicationsmentioning

confidence: 52%

“…In addition to such change, biological production seemed to vary with the relation to the impact of freshwater and Aeolian dust deposition from the continental land. Some studies based on bio-molecules and stable isotope analysis have already detected such evidences (Ishiwatari et al, 1994;Minoura et al, 1997;Okumura et al, 1996;Minagawa and Nakanishi, 2000), however, it has been limited to read more detail mechanism using some chemical signals in sediment core samples to certify such hypothesis based on only general knowledge of proxies, because of its unique oceanographic condition of the Japan Sea, for in-…”

Section: Stable Carbon and Nitrogen Isotopic Compositions Of Sinking mentioning

confidence: 99%

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Stable carbon and nitrogen isotopic compositions of sinking particles in the northeast Japan Sea.

Nakanishi

Minagawa

2003

Geochem. J.

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A sediment trap experiment and stable carbon and nitrogen isotope analysis of sinking organic particles have been performed in the northeast Japan Sea from August 1998 to October 1999 in order to confirm the relationship between seasonal variability of phytoplankton production and the isotope composition of sinking particles. The sediment trap deployed at 1090 m has successfully recovered samples recording organic particles sinking for a year round. Increases of POC and total mass fluxes suggested that blooming occur twice a year in late autumn and early summer in this region. It was shown that the seasonal variation of δ 13 C and δ 15 N of sinking particles could be explained by the general pattern controlling isotope ratios of phytoplankton so that appearance of isotope fractionation on photosynthesis and nitrate uptake might play a most important role to change δ 13 C and δ 15 N of phytoplankton in tightly linked with nutrient supply and production rate in the mixed layer. The δ 13 C and δ 15 N of the surface sediment were significantly heavier than those of sinking particles and showed a consistent trend of vertical isotopic change with the results reported in previous works. Compiled such vertical trend we addressed that carbon and nitrogen isotopic discrimination between sinking particles and the surface sediment might be qualified by the bottom depth due to isotope discrimination in sinking process but further modification can occur by regional factors such as import of allochthonous substances. Finally we stress about the implication of such factor to apply isotopic proxies to paleoceanographic research.

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Section: Paleoceanographic Implicationsmentioning

confidence: 52%

Section: Stable Carbon and Nitrogen Isotopic Compositions Of Sinking mentioning

confidence: 99%

Stable carbon and nitrogen isotopic compositions of sinking particles in the northeast Japan Sea.

Nakanishi

Minagawa

2003

Geochem. J.

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“…Besides abundance, organic carbon in sediments can preserve syn-depositional signals (isotopes), which are of use in source identification (Arthur et al 1988;Müller and Voss 1999). The isotopic composition of organic carbon is hence widely used as a proxy to determine the different organic sources of carbon, which in turn can reflect the sedimentary environment that captured the carbon and vegetation changes that might have occurred at the time (Hatté et al 1998;Minoura et al 1997;Mora and Pratt 2002;Tenzer et al 1999;Schubert and Calvert 2001). In addition to organic matter from reworked sediments, two major sources are believed to provide the organic carbon buried in coastal sediments.…”

Section: Introductionmentioning

confidence: 99%

Organic Carbon Inferred Environmental Fluctuations during Late Quaternary, Southwestern Taiwan

Chiang¹,

Chen²

2005

Terr. Atmos. Ocean. Sci.

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ABSTRACT1 Department of Geoscience, National Taiwan University, Taipei, Taiwan, ROC * Corresponding author address: Prof. Yue-Gau Chen, Department of Geoscience, National Taiwan University, Taipei, Taiwan, ROC; E-mail: ygchen@ntu.edu.twOrganic carbon abundance and isotopic composition of sediments in a coastal plain are potentially used to indicate depositional environments and hinterland organic sources. Since Taiwan is located on the eastern margin of the Eurasian continent facing eastward to the Pacific, its geographical position is sensitive to interactions between the sea and land. Changes in the climate have a direct bearing on the costal environment and types of terrestrial plant species that inhabit it. In this study, we sampled two cores drilled from the coastal plain of southwestern Taiwan, and conducted concentration and isotopic analyses of organic carbon.Compared with the generally accepted environmental evolution of Taiwan, our study shows the dominant marine organic source have brought on relatively stable carbon abundance and low level isotopic values for total organic carbon (TOC), whilst input from terrestrial sources attributed to arid-climate-induced C 4 plant blooms make TOC content and δ

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“…δ 13 C * signatures have been widely used in both lacustrine and marine sediments not only as indicators of organic matter source, but also as indicators of enhanced aquatic productivity (McKenzie 1985, Calvert et al 1992, Shamesh et al 1993, Minoura et al 1997, Schubert and Calvert 2001. δ 13 C signature may be used as a productivity indicator because photosynthetic discrimination processes preferentially incorporate 12 C, thus the resultant organic matter is relatively "depleted" in terms of 13 C, leaving the dissolved carbon pool in the photic zone and subsequently generated organic carbon enriched in 13 McKenzie 1991).…”

Section: Stable Isotopes Of Carbon and Nitrogenmentioning

confidence: 99%

“…Many studies invoke the nitrogen isotopic composition of sedimentary organic matter as a direct record of surface water nutrient utilization and paleoproductivity, explaining organic matter δ 15 N values as a product of Rayleigh fractionation kinetics (Calvert et al 1992, Francois et al 1992, Minoura et al 1997). Yet, nutrient utilization and paleoproductivity have not successfully explained the sedimentary record in lake sediments (Teranes and Bernasconi 2000), perhaps because phosphorus, rather than nitrogen, is the primary limiting nutrient in lacustrine settings.…”

Section: Isotopic and Elemental Source Characterizationmentioning

confidence: 99%

Carbon and Nitrogen Stable Isotopic Patterns in South Florida Coastal Ecosystems: Modern and Paleoceanographic Perspectives

Evans¹

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Late Pleistocene-Holocene paleoproductivity circulation in the Japan Sea: sea-level control on δ13C and δ15N records of sediment organic material

Cited by 59 publications

References 15 publications

Stable carbon and nitrogen isotopic compositions of sinking particles in the northeast Japan Sea.

Stable carbon and nitrogen isotopic compositions of sinking particles in the northeast Japan Sea.

Organic Carbon Inferred Environmental Fluctuations during Late Quaternary, Southwestern Taiwan

Carbon and Nitrogen Stable Isotopic Patterns in South Florida Coastal Ecosystems: Modern and Paleoceanographic Perspectives

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