Planktonic foraminiferal response to upwelling and seasonal hydrographic conditions; sediment trap results from San Pedro Basin, Southern California Bight

Sautter, L.; Thunell, Robert C.

doi:10.2113/gsjfr.21.4.347

Cited by 184 publications

(101 citation statements)

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“…The presence and abundance of G. quinqueloba is associated with high diatom production (Kincaid et al 2000, Sautter andThunell 1991) during a La Niña-like state (Black et al 2001). In the past millennium, the predominance of G. quinqueloba relative to Globigerina bulloides occurs when subpolar water masses with high nutrient content and low chlorophyll content are advected in the California Current System (Fisler and Hendy 2008).…”

Section: Margen De Magdalena Y Su Respuesta a El Niño Durante El úLtimentioning

confidence: 99%

Variability of marine biological productivity in the northeastern Pacific over the past millennium

Juárez¹,

Sánchez²,

González-Yajimovich³

2015

Cienc. Mar.

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ABSTRACT. In this study we present new data of biogenic opal (BO), organic carbon (OC), and calcium carbonate (CaCO 3 ) in a highresolution record from the western coast of Baja California Sur, Mexico. The variability of marine biological productivity in this area is dominated by El Niño and La Niña events on different time scales. The BO and OC contents showed a decrease between AD 1100 and 1400. From AD 1400 to the present, BO and OC showed a significant increase, indicating permanent upwelling conditions. The CaCO 3 content showed an inverse correlation with OC, which suggests that the exported OC fluxes are a significant factor controlling CaCO 3 dissolution in the sediment. The increase in BO and OC was synchronic with a decline in the number of El Niño events (6 ± 4 every 100 years) over the last 600 years of the millennium.Key words: biogenic opal, organic carbon, El Niño, La Niña, upwelling. RESUMEN.En este trabajo se presentan nuevos datos de un registro de alta resolución de ópalo biogénico (OB), carbono orgánico (CO) y carbonato de calcio (CaCO 3 ) en la costa occidental de Baja California Sur, México. En esta región, la variabilidad de la productividad biológica marina es dominada por la intensidad de los eventos El Niño y La Niña en diversas escalas de tiempo. Los contenidos de OB y CO disminuyeron durante el periodo de AD 1100 a 1400. En el periodo de AD 1400 al presente, el OB y CO aumentaron significativamente, lo cual indica condiciones permanentes de surgencia. El contenido de CaCO 3 se correlacionó inversamente con el CO, y esto sugiere que los flujos de CO exportado son un factor significativo que controla la disolución de CaCO 3 en el sedimento. El incremento en el OB y CO fue sincrónico con la disminución en el número de eventos de El Niño (6 ± 4 cada 100 años) para los últimos 600 años del milenio.Palabras clave: ópalo biogénico, carbono orgánico, El Niño, La Niña, surgencia.

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Section: Margen De Magdalena Y Su Respuesta a El Niño Durante El úLtimentioning

confidence: 99%

Variability of marine biological productivity in the northeastern Pacific over the past millennium

Juárez¹,

Sánchez²,

González-Yajimovich³

2015

Cienc. Mar.

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“…Data from the 1×1 • grid-points closest to each sediment trap position were transformed to weekly values, and mean mixed-layer depths were calculated for every sampling interval. We applied the same time-lag between trap data and surface hydrography as described byŽarić et al (2005): Due to life cycles of foraminifera an adjustment of two weeks was used for all sediment-trap data (Sautter and Thunell, 1991). An additional one-week correction (i.e.…”

Section: Calibration Data Setmentioning

confidence: 99%

Global prediction of planktic foraminiferal fluxes from hydrographic and productivity data

2006

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Abstract. Understanding and quantifying the seasonal and spatial distribution of planktic foraminiferal fluxes reflected in sedimentary assemblages is key to interpret foraminiferabased proxies in paleoceanography. Towards this goal we present an empirical model to predict foraminiferal fluxes on a global scale.A compilation of planktic foraminiferal flux and export production data from globally distributed sediment traps together with environmental data of sea-surface temperature and mixed-layer depth from online databases is used to calibrate the model that calculates monthly foraminiferal fluxes for the 18 most common species. The calibrated model is then forced with a global data set of hydrographic and productivity data to predict monthly foraminiferal fluxes worldwide. The predictive skills of the model are assessed by comparing the model output with planktic foraminiferal assemblages from globally distributed surface sediments as well as with measured foraminiferal fluxes of sediment traps not included in the calibration data set.Many general distribution patterns of foraminiferal species recognized from the model output compare favorably with observations from coretops or sediment traps, even though the model still produces problematic results in some places. Among others, meridional gradients in species richness and diversity, increased relative abundances of Neogloboquadrina pachyderma (dex.) in upwelling areas, and peak abundances of Globigerinella siphonifera in oligotrophic subtropical gyres show good agreement between model and coretops. Absolute foraminiferal fluxes are significantly underestimated in most cases, while seasonal variations can be reproduced for some species. Interannual differences in foraminiferal fluxes are not reflected by the model which might partly be due to a lack of actual environmental data for the calibration and model experiments.Correspondence to: S.Žarić (zaric@uni-bremen.de)The limited predictive skills of the model suggest that additional parameters should be considered. Export production should probably be replaced by a more realistic representation of food availability for planktic foraminifera. This could be achieved by adding a dynamic component to the model and linking it to an ecosystem model.

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“…It is abundant in near-surface water when biomass is high, as in upwelling pulses [43]. Kincaid et al [44] found that its abundance is correlated with phytoplankton blooms.…”

Section: Taxa As Hydrographicmentioning

confidence: 99%

“…Kincaid et al [44] found that its abundance is correlated with phytoplankton blooms. Vertically stratified plankton tows in the Southern Ocean between [41][42][43][44][45][46][47][48][49][50][51][52][53] ∘ S [45] show its abundance covaries closely with fluorescence maxima, a biomass proxy, in near-surface water. Schiebel et al [46] found that its abundance is closely related to entrainment of nutrient-rich water.…”

Section: Taxa As Hydrographicmentioning

confidence: 99%

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Planktonic Foraminifera as Oceanographic Proxies: Comparison of Biogeographic Classifications Using Some Southwest Pacific Core-Top Faunas

Scott

2013

ISRN Oceanography

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The distribution of planktonic foraminifera, as free-floating protists, is largely controlled by hydrography. Their death assemblages in surficial sediments provide proxy data on upper water mass properties for paleoceanography. Techniques for mapping faunal distributions for this purpose are compared in a study of 35 core-top samples that span the Subtropical Front in the Southwest Pacific. Faunas are analyzed by taxon composition, order of dominant taxa, and abundance. Taxon composition (presence-absence data) and dominant taxa (ordinal data) recognize groups of sites that approximate major water mass distributions (cool subtropical water, subantarctic water) and clearly define the location of the Subtropical Front. Quantitative data (relative abundances) more closely reflect the success of taxa in upper water mass niches. This information resolves groups of sites that reflect differences in intrawater mass hydrography. Comparisons suggest that abundance data should provide much better oceanographic resolution globally than the widely used ordinal biogeographic classification that identifies only Tropical, Subtropical Transitional, Subpolar and Polar provinces. As the data are strongly structured by variance in the abundance of Globigerina bulloides, Globorotalia inflata, Neogloboquadrina incompta, and Neogloboquadrina pachyderma, comparable classifications result from most clustering strategies. Principal coordinates analysis best represents the configuration of sites in two dimensions.

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Planktonic foraminiferal response to upwelling and seasonal hydrographic conditions; sediment trap results from San Pedro Basin, Southern California Bight

Cited by 184 publications

References 0 publications

Variability of marine biological productivity in the northeastern Pacific over the past millennium

Variability of marine biological productivity in the northeastern Pacific over the past millennium

Global prediction of planktic foraminiferal fluxes from hydrographic and productivity data

Planktonic Foraminifera as Oceanographic Proxies: Comparison of Biogeographic Classifications Using Some Southwest Pacific Core-Top Faunas

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