Foraminiferal shells in sediment traps: Implications of biogenic particle transport in the Kao-ping submarine canyon, Taiwan

Lin, Hui-Ling; Liu, James T.; Hung, Gwo-Wei

doi:10.1016/j.csr.2005.09.001

Cited by 15 publications

(5 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Typhoons also result in cross-shelf transport. For instance, benthic foraminifera have been found in a set of sediment traps moored off the Gaoping River during the landfall of the typhoon Kay-tak (2000) (Lin et al, 2005). The isotopic compositions of the benthic foraminifera recovered from the upper (186 m) and lower (236 m) traps suggest calcification depth <50 m, thus they must have been transported from shallower localities.…”

Section: Taiwanmentioning

confidence: 99%

“…To date, foraminiferal studies off Taiwan have been mostly focusing on the temporal flux in the water column (i.e., sediment traps), benthic foraminiferal biocenosis (Lin and Hsieh, 2007;Lin, 2014;Lin et al, 2011), and the application of benthic foraminifera to assess coral reef health (Chen and Lin, 2017). Little attention has been paid to the utility of foraminifera as a tracer for geohazards or extreme events, despite promising early observations that suggested a correlation between the transport of foraminiferal tests and the landfall of typhoons (Lin et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Foraminifera as a tool for the reconstruction of paleobathymetry and geohazard: A case study from Taiwan

Tapia¹,

Le²,

Ho³

et al. 2022

Preprint

View full text Add to dashboard Cite

The calcite tests of foraminifera are an important biogenic component of marine sediments. The abundance of foraminiferal tests in marine sediments broadly varies with bathymetry, thus has been used to reconstruct paleobathymetry. It is also promising as a tracer for downslope transport triggered by earthquakes and typhoons, especially if the displaced material from shallow locality contrasts strongly with the background autochthonous sediments in terms of foraminiferal abundance, such as the ratio of benthic and planktic foraminifera termed %P. However, its applicability in sediments off Taiwan has not been assessed. Taiwan is located in the path of typhoons and at tectonic plate margins, where typhoons and earthquakes may trigger submarine geohazards. This, combined with the fact that its seafloor spans a large bathymetric range, render this region an ideal natural laboratory to evaluate the applicability of %P as a proxy for tracing submarine geohazards and bathymetry. Here we report foraminiferal abundance, %P, grain size and elemental data from 148 surface sediment samples off 6 sectors off Taiwan, namely Southern Okinawa Trough, Hoping-Nanao-Hateruma Basins, Taitung-Hualien, Hengchun Ridge, Gaoping, and Changyun Sand Ridge. Of all the hydrographic and sedimentological parameters assessed, seafloor bathymetry is the major driver of foraminiferal abundance and %P in these regions. Notably, several data points deviate from the regional %P-water depth relationship. Based on sedimentological parameters and previous studies, we posit that these outliers may have to do with local sedimentation setting. These processes include earthquake-induced sediment transport via submarine canyon in the Southern Okinawa Trough, typhoon-triggered sediment flushing in Gaoping Canyon, cross-shelf and northward advection of planktic foraminifera on the Gaoping shelf, and carbonate dissolution in deep Hateruma Basin. Off Taiwan, the %P value in sediments increases exponentially with bathymetry (R2 = 0.72), and agrees well with the global calibration obtained by combining 827 data from several regions of the global ocean. The regional %P-water depth relationship may be useful for reconstructing paleobathymetry here, albeit with an uncertainty of ~400 m that increases with bathymetry especially >2000 m. Our results also highlight the potential of the %P index as a tracer for downslope transport and lateral advection in the water column. The downcore application of %P therefore has the potential to reconstruct past geohazard events while also identify autochthonous sediment sequences that are suitable for paleoceanographic reconstruction.

show abstract

Section: Taiwanmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Foraminifera as a tool for the reconstruction of paleobathymetry and geohazard: A case study from Taiwan

Tapia¹,

Le²,

Ho³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Shallow-sourced material is exported in the form of sediments (Puig et al 2003) and organic matter (Lin et al 2005), including detached macrophytes such as kelp and seagrass (Okey 1997, 2003, Harrold et al 1998, Vetter & Dayton 1999. Canyons can intensify mixing and the formation of cyclonic eddies (Allen et al 2001), and are sites of both upwelling (Kämpf 2005), and downwelling (Wåhlin 2002).…”

Section: Introductionmentioning

confidence: 99%

Richness and distribution of sponge megabenthos in continental margin canyons off southeastern Australia

Schlacher¹,

Schlacher-Hoenlinger²,

Williams³

et al. 2007

Mar. Ecol. Prog. Ser.

119

101

View full text Add to dashboard Cite

Submarine canyons are spectacular topographical features that intersect the continental margins of the world's oceans. Canyons comprise unique habitats in terms of complexity, instability, material processing, and hydrodynamics, and they may support diverse assemblages of larger epibenthos. Yet, quantitative data on the biodiversity of the megabenthos in canyons are scant. Consequently, we quantified the diversity of sponges (a key and dominant group of the megabenthos) in 5 canyons located on the continental margin off southeastern Australia at depths from 114 to 612 m. The canyons harboured a rich sponge fauna, with a total of 165 species, belonging to 65 genera, 41 families, 10 orders, and 2 classes in 14 sled samples. Species richness declined with depth, but was positively linked to spatial heterogeneity of bottom types. Areas comprised of a broader range of bottom types (e.g. mixed rocky and sandy/muddy bottoms) contained more species than areas with more uniform substratum properties. Spatial patterns of the sponge assemblages were characterized by (1) high species turnover both between sites in individual canyons and between different canyons, and (2) low levels of site occupancy of the component species, with most species recorded from single canyons only. Variations in depth, substratum type and topographic relief resulted in heterogeneous environmental conditions of benthic habitats in canyons that corresponded to changes in the assemblage structure of sponges. A broad comparison with other abrupt topographical features in the bathyal zone of the region suggests that canyon assemblages may rival the diversity of sponges on seamounts. Site-to-site variation in diversity and species composition within individual canyons suggests that biological patterns may be finer-grained than the spatial scale of conventional geomorphological units. Consequently, from a perspective of conservation planning, a single or a few canyons are unlikely to accurately represent the regional faunal diversity, because of the strong biotic separation of communities between canyons and the limited distributional ranges of the component species.

show abstract

“…BSW determination was carried out using the ASTM D4007-11 standard method . In graduated glass tubes, 4 mL of the emulsion and 4 mL of toluene previously water saturated at 60 °C were mixed.…”

Section: Experimental and Methodsmentioning

confidence: 99%

Amidated Cellulose Nanofibrils as Demulsifying Agents for a Natural Water-in-Heavy-Crude-Oil Emulsion

Gómez-Jaimes

Blanco‐Tirado

2020

Energy Fuels

View full text Add to dashboard Cite

The presence of emulsified water in heavy crude oils invariably causes processing problems and financial costs associated with an increased energy input required to handle highly viscous fluids. Thus, physical or chemical separation methods are usually applied to dehydrate crude oils before processing. Dehydration chemicals or demulsifiers are among the most widely used chemical strategies to rid heavy crude oil from water. In this work, we explore the use of amidated cellulose nanofibrils as dehydrating agents for a water-in-heavy-crude-oil emulsion. Using microcrystalline cellulose (MCC) as raw material, we extracted oxidized cellulose nanofibrils (1.25 mmol COOH/g cellulose) via ultrasound-assisted TEMPO oxidation. TEMPO-oxidized cellulose nanofibrils (TOCNs) were rendered hydrophobic through the coupling with dodecyl-and octadecylamine through one-pot amidation reactions. The introduction of C 12 and C 18 alkyl moieties on the cellulose surface was enough to promote the dispersion of the materials in toluene and increase the water contact angle (CA) from 17°for TOCN to 61°and 67°for TOCN-AMDC 12 and TOCN-AMDC 18 , respectively. HLB values of 9.6 and 9.2 for TOCN-AMDC 12 and TOCN-AMDC 18 are characteristic of dehydrating agents for w/o emulsions. Thus, the materials were tested as demulsifying agents for the disruption of a natural water-inheavy-crude-oil emulsion with a water content of 55%. Conventional tests (BSW, bottle test) showed the ability of TOCN-AMDC 12 and TOCN-AMDC 18 to effectively dehydrate the emulsions, with a water recovery up to 74%, when used at 1500 ppm in toluene as the carrier fluid. Optical microscopy and rheological analysis were performed before and after the nanofluids' application to determine the viscosity profile of the emulsion and to observe the types and sizes of water droplets in the oil phase after dehydration.

show abstract

Foraminiferal shells in sediment traps: Implications of biogenic particle transport in the Kao-ping submarine canyon, Taiwan

Cited by 15 publications

References 33 publications

Foraminifera as a tool for the reconstruction of paleobathymetry and geohazard: A case study from Taiwan

Foraminifera as a tool for the reconstruction of paleobathymetry and geohazard: A case study from Taiwan

Richness and distribution of sponge megabenthos in continental margin canyons off southeastern Australia

Amidated Cellulose Nanofibrils as Demulsifying Agents for a Natural Water-in-Heavy-Crude-Oil Emulsion

Contact Info

Product

Resources

About