The benthic silica cycle in the Northeast Atlantic: annual mass balance, seasonality, and importance of non-steady-state processes for the early diagenesis of biogenic opal in deep-sea sediments

Ragueneau, Olivier; Gallinari, Morgane; Corrin, Lydie; Grandel, Sibylle; Hall, Per; Hauvespre, Anne; Lampitt, Richard S.; Rickert, Dirk; Ståhl, Henrik; Tengberg, Anders; Witbaard, Rob

doi:10.1016/s0079-6611(01)00053-2

Cited by 114 publications

(65 citation statements)

References 93 publications

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“…40 to 200 mg solid to 40 ml solution for 8 h leaching; Liu et al 2002). The level for most of the SPM samples, however, was ≤30 mg. Ragueneau and co-workers performed several alkaline digestion comparisons (0.2, 0.5 and 1 M NaOH, 1, 2 and 5% Na 2 CO 3 ) and reached consistent BSi results (Ragueneau et al 2001).…”

Section: Samplingmentioning

confidence: 65%

“…The BSi burial efficiency, that is, the silica accumulation rate divided by the sum of the silica accumulation rate and the benthic silicate flux, was calculated to range between 36% at Stn E6 and 97% at Stn DC10, adjacent to the Changjiang Estuary. These values were higher than those in the Equatorial Pacific Ocean (6.4%) (Ragueneau et al 2001), the global ocean average (~20%) (Tréguer et al 1995) and most coastal environments (1.9 to 17.1%) , Koning et al 1997, Rabouille et al 1997, Schlüter et al 1998), but are comparable with those in the Polar Front Zone of the Southern Ocean and the Inner Ross Sea (33.0 and 58.1%, respectively; Ragueneau et al 2001). This is presumably due to high sediment accumulation rates.…”

Section: Removal and Burial Of Silicamentioning

confidence: 67%

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Ecological significance of biogenic silica in the East China Sea

Liu

Zhang²,

Li³

2005

Mar. Ecol. Prog. Ser.

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Field observations were carried out in the East China Sea (ECS) in October 2000, May 2001 and April-May 2002. Biogenic silica (BSi) in core sediments, sediment traps, and suspended particulate matter (SPM) was measured; silicate profiles in pore waters were examined. The concentration of BSi in SPM was high in coastal areas. The content of BSi in ECS sediments is less than 1%, as the result of tremendous riverine input of terrigenous weathered materials. For the ECS Shelf, the dissolution of BSi in sediment cores is important to maintain high levels of silicate in the water column, supporting prolific primary production by diatoms. BSi burial efficiencies, that is, the silica accumulation rate divided by the sum of the silica accumulation rate and the benthic silicate flux, are estimated to be 36 to 97%, higher than in the Equatorial Pacific Ocean and higher than the global ocean average. BSi regeneration efficiency, that is, the ratio of BSi vertical flux minus the BSi accumulation rate relative to BSi vertical flux, is ca. 80% for the ECS. A silica budget was established for the ECS shelf, and the model output shows that major silicate input comes from the Kuroshio, followed by silicate from the riverine inflow and the Taiwan Strait. About 75% of gross BSi production dissolves in the water column over the ECS Shelf.KEY WORDS: Biogenic silica · Burial · Regeneration · Budget · East China SeaResale or republication not permitted without written consent of the publisher

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Section: Samplingmentioning

confidence: 65%

Section: Removal and Burial Of Silicamentioning

confidence: 67%

Ecological significance of biogenic silica in the East China Sea

Liu

Zhang²,

Li³

2005

Mar. Ecol. Prog. Ser.

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“…This might be caused by high bioturbation observed at this site or high spatial variations between the 12 cores retrieved by one MUC deployment. It should be mentioned that slight deviations in porewater composition derived from different cores of a Multicorer system were observed before (e.g., Ragueneau et al 2001).…”

Section: Seeberg-elverfeldt Et Almentioning

confidence: 85%

Rhizon sampling of porewaters near the sediment‐water interface of aquatic systems

Seeberg‐Elverfeldt

Schlüter

Feseker

et al. 2005

Limnology & Ocean Methods

560

338

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Rhizon samplers were originally designed as micro-tensiometers for soil science to sample seepage water in the unsaturated zone. This study shows applications of Rhizons for porewater sampling from sediments in aquatic systems and presents a newly developed Rhizon in situ sampler (RISS). With the inexpensive Rhizon sampling technique, porewater profiles can be sampled with minimum disturbance of both the sediment structure and possible flow fields. Field experiments, tracer studies, and numerical modeling were combined to assess the suitability of Rhizons for porewater sampling. It is shown that the low effort and simple application makes Rhizons a powerful tool for porewater sampling and an alternative to classical methods. Our investigations show that Rhizons are well suited for sampling porewater on board a ship, in a laboratory, and also for in situ sampling. The results revealed that horizontally aligned Rhizons can sample porewater with a vertical resolution of 1 cm. Combined with an in situ benthic chamber system, the RISS allows studies of benthic fluxes and porewater profiles at the same location on the seafloor with negligible effect on the incubated sediment water interface. Results derived by porewater sampling of sediment cores from the Southern Ocean (Atlantic sector) and by in situ sampling of tidal flat sediments of the Wadden Sea (Sahlenburg/Cuxhaven, Germany) are presented.

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“…Mass fluxes from both trap types averaged over the water column over both years show good agreement in quantity with estimated accumulation rates from two dated cores (ϳ200 g dry mass m Ϫ2 yr Ϫ1 ), although the quality of trap seston and lake sediment is very different, especially in terms of biogenic silica (cf. Ragueneau et al 2000).…”

Section: Discussionmentioning

confidence: 99%

Quantitative and qualitative relationships between planktonic diatom communities and diatom assemblages in sedimenting material and surface sediments in Lake Baikal, Siberia

Ryves

Jewson²,

Sturm

et al. 2003

Limnology & Oceanography

110

127

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Endemic planktonic diatoms are a major component of Lake Baikal sediments during interglacial periods. To investigate how these diatom assemblages are altered during sediment formation, quantitative plankton monitoring (1995)(1996)(1997)(1998) was integrated with sediment trapping over 2 yr (1996)(1997) in Baikal's southern basin (depth ϳ1,400 m). The traps consisted of both open (ϳ6 monthly) and sequential (ϳ2 weekly) collectors deployed throughout the water column. Sedimentation was seasonal, with diatom species composition, valve abundance, and total dry mass reflecting changes in the planktonic communities. Sedimented assemblages were transmitted largely intact to the deepest traps (ϳ1,300-1,390 m); some compositional blurring occurred from differential sinking rates and dissolution of diatom valves. A rapid mass flux event of Aulacoseira skvortzowii and A. baicalensis was recorded in summer 1997 with particle sinking rates between 60 and 100 m d Ϫ1 and dry mass fluxes Ͼ5 g m Ϫ2 d Ϫ1 . Although dissolution was evident for all species, more delicate taxa were preferentially affected (e.g., A. skvortzowii vegetative cells and fine Synedra species), whereas Nitzschia acicularis valves were almost entirely dissolved within the water column. Comparing trap and plankton diatom assemblages with those in nearby core tops demonstrated that a fundamental taphonomic change occurs in the surface sediment, with sedimentary diatom accumulation rates being only about 1% of trap deposition and plankton production rates. Dissolution was significant in explaining 5-30% of species variance between all taphonomic levels (plankton, trap samples, and surface sediments). Results indicate that diatom-based paleoclimatic records in Lake Baikal sediments could be improved and refined by taking taphonomic considerations into account.The transmission of biogenic environmental signals from the upper water column of deep water bodies to the sediment

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The benthic silica cycle in the Northeast Atlantic: annual mass balance, seasonality, and importance of non-steady-state processes for the early diagenesis of biogenic opal in deep-sea sediments

Cited by 114 publications

References 93 publications

Ecological significance of biogenic silica in the East China Sea

Ecological significance of biogenic silica in the East China Sea

Rhizon sampling of porewaters near the sediment‐water interface of aquatic systems

Quantitative and qualitative relationships between planktonic diatom communities and diatom assemblages in sedimenting material and surface sediments in Lake Baikal, Siberia

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