Nitrogen isotope and chlorin paleoproductivity records from the Northern South China Sea: remote vs. local forcing of millennial- and orbital-scale variability

Higginson, M. J.; Maxwell, James R.; Altabet, Mark A.

doi:10.1016/s0025-3227(03)00218-4

Cited by 89 publications

(85 citation statements)

References 94 publications

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“…5 are the percentages of the four biomarkers by normalization of individual biomarker content to their total amount. At least semi-quantitatively, these plots reveal relative contributions of these phytoplanktons to the total productivity (Werne et al 2000; Higginson and Altabet 2004). Several features are revealed by this approach, the most obvious is that the community structure underwent significant changes during the last glacial and Holocene.…”

Section: Biomarker Percentage and Phytoplankton Community Structure Cmentioning

confidence: 97%

“…The glacial-interglacial productivity pattern for core MD05-2904 revealed by these biomarker proxies is generally in agreement with those by other proxies for the northern SCS. For example, the content of TOC (Huang et al 1997a, b) and chlorins (Higginson et al 2003) showed higher total productivity during the glacials, while the contents of opal (Lin et al 1999) and alkenones (Huang et al 1997a, b;Kienast et al 2001a) revealed higher productivity for diatom and haptophyte productivity during the glacials. On the other hand, glacial-intetglacial productivity change for the southern SCS revealed different patterns.…”

Section: Biomarker Content Records and Phytoplankton Productivity Chamentioning

confidence: 99%

“…This could imply that the phytoplankton community structure remained stable although individual phytoplankton productivity all decreased significantly from the glacial to the Holocene. A more quantitative way to evaluate community structure changes is the normalized biomarker content (Werne et al 2000;Higginson and Altabet 2004). Plotted in Fig.…”

Section: Biomarker Percentage and Phytoplankton Community Structure Cmentioning

confidence: 99%

“…A multi-biomarker approach has been used to reconstruct both total and individual phytoplankton productivity, and thus applied to reconstruct paleo-community structure change in a variety of climate settings (Schubert et al 1998;Hinrichs et al 1999;Versteegh and Zonneveld 2002;Menzel et al 2003;Schulte and Bard 2003;Higginson and Altabet 2004;Zhao et al 2006b). Different patterns of community structure change have emerged from those reconstructions.…”

Section: Introductionmentioning

confidence: 99%

“…But in the Cariaco Basin (Werne et al 2000) and in the Okhotsk Sea (Seki et al 2004), structure changes between diatom-dominated community and haptophyte-dominated community occurred during glacial to Holocene transitions. These changes could have played a role in regulating atmospheric CO 2 levels over glacialinterglacial timescales (Werne et al 2000;Higginson and Altabet 2004).…”

Section: Introductionmentioning

confidence: 99%

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Biomarker Evidence of Relatively Stable Community Structure in the Northern South China Sea during the Last Glacial and Holocene

He¹,

Zhao²,

Li³

et al. 2008

Terr. Atmos. Ocean. Sci.

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High-resolution molecular abundance records for several marine biomarkers during the last glacial and Holocene have been generated for core MD05-2904 (19°27.32'N, 116°15.15'E, 2066 m water depth) from the northern South China Sea. The U K' 37 SST record indicates a 4.4°C cooling during the Last Glacial Maximum for this site, consistent with previous reconstructions. The contents of C 37 alkenones, dinosterol, brassicasterol, and C 30 alkyl diols are used as productivity proxies for haptophytes, dinoflagellates, diatoms, and eustigmatophytes, respectively. These records reveal that both individual phytoplankton group and total productivity increased by several factors during the LGM compared with those for the Holocene, in response to increased nutrient supply. However, the community structure based on biomarker percentages remained relatively stable during the last glacial-Holocene transition, although there were short-term oscillations.

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Section: Biomarker Percentage and Phytoplankton Community Structure Cmentioning

confidence: 97%

Section: Biomarker Content Records and Phytoplankton Productivity Chamentioning

confidence: 99%

Section: Biomarker Percentage and Phytoplankton Community Structure Cmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Biomarker Evidence of Relatively Stable Community Structure in the Northern South China Sea during the Last Glacial and Holocene

He¹,

Zhao²,

Li³

et al. 2008

Terr. Atmos. Ocean. Sci.

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Dynamics of primary productivity in the northern South China Sea over the past 24,000 years

Zhang

Liu

Jin

et al. 2016

Geochem Geophys Geosyst

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In this study, paleoproductivity on millennial scales was precisely reconstructed from core MD12‐3428cq in the northern South China Sea (SCS) over the past 24 kyr, based on a transfer function derived from the strong exponential negative correlation between relative abundance of Florisphaera profunda (%FP) in core top sediments and basin‐wide satellite‐based primary productivity (PP) in the SCS. To detect the potential driving mechanisms of PP, correlation analyses were carried out among our PP records and other paleoenvironment parameters. PP peaked during 18–15 ka in parallel with the strong East Asian Winter Monsoon (EAWM). From 15 ka to the early Holocene, a decrease in PP coincided with sea level progradation and weakening of EAWM, which ultimately reduced fluvial nutrient levels and wind‐driven upper water column mixing. Since the middle Holocene, gradually more frequent El Niño‐Southern Oscillation (ENSO) events have taken place, further decreasing PP by injecting oligotrophic Kuroshio water masses into the northern SCS. Associated findings conclusively indicated that the main controlling factors of PP in the northern SCS have shifted from EAWM (glacial) to ENSO (interglacial) over the past 24 kyr.

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Examining N cycling in the northern South China Sea from N isotopic signals in nitrate and particulate phases

et al. 2017

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Nitrogen sources and dynamics, one of the key issues in marine biogeochemical cycles, remain poorly constrained in marginal seas. Here we examine the nitrogen cycle in the northern South China Sea (SCS) by combining data from previous reports with a new data set of N isotopic compositions (δ15N) of nitrate, zooplankton, and sinking particles. Average δ15N in subsurface nitrate is 4.8 ± 0.3‰, similar to that of sinking particles (δ15Nsink of 4.4‰) through the euphotic zone (EZ) collected by floating traps and to documented mean (4.6‰) for long‐term mooring traps at 200 m. This along with oft‐observed shallow nitracline (<100 m) suggests that subsurface nitrate is the primary source of new N to support export production. Moreover, δ15Nsink at the bottom of the EZ resembles those of suspended particles (4.2 ± 1.0‰) and zooplankton (5.4 ± 1.0‰) inside the EZ. High similarity in δ15N among various types of particles including zooplankton in different size fractions in the EZ implies rapid N turnover in the ecosystem. In deep waters at 2000–3000 m, however, additional particulate N fluxes are found due to lateral transport, which contain 15N‐depleted particles, resulting in a downward decreasing trend of δ15Nsink. Incorporation of lighter N by bacteria and selective export of picoplankton are proposed as alternative mechanisms contributing to low δ15Nsink in the deep waters. The significant δ15Nsink change in the deep water column makes the SCS different from most other marginal seas; thus, caution should be made when using sedimentary δ15N to reconstruct paleonitrogen processes.

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Nitrogen isotope and chlorin paleoproductivity records from the Northern South China Sea: remote vs. local forcing of millennial- and orbital-scale variability

Cited by 89 publications

References 94 publications

Biomarker Evidence of Relatively Stable Community Structure in the Northern South China Sea during the Last Glacial and Holocene

Biomarker Evidence of Relatively Stable Community Structure in the Northern South China Sea during the Last Glacial and Holocene

Dynamics of primary productivity in the northern South China Sea over the past 24,000 years

Examining N cycling in the northern South China Sea from N isotopic signals in nitrate and particulate phases

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