scholarly journals Alkaline‐extractable silicon from land to ocean: A challenge for biogenic silicon determination

2015 ◽  
Vol 13 (7) ◽  
pp. 329-344 ◽  
Author(s):  
Lúcia Barão ◽  
Floor Vandevenne ◽  
Wim Clymans ◽  
Patrick Frings ◽  
Olivier Ragueneau ◽  
...  
Keyword(s):  
Biogenic Silicon

scholarly journals Protist diversity on a nature reserve in NW England—With particular reference to their role in soil biogenic silicon pools

Pedobiologia ◽  
2016 ◽  
Vol 59 (1-2) ◽  
pp. 51-59 ◽  
Author(s):  
Angela L. Creevy ◽  
Jane Fisher ◽  
Daniel Puppe ◽  
David M. Wilkinson
Keyword(s):  
Nature Reserve ◽  
Biogenic Silicon

scholarly journals How big is the influence of biogenic silicon pools on short-term changes in water-soluble silicon in soils? Implications from a study of a 10-year-old soil–plant system

2017 ◽  
Vol 14 (22) ◽  
pp. 5239-5252 ◽  
Author(s):  
Daniel Puppe ◽  
Axel Höhn ◽  
Danuta Kaczorek ◽  
Manfred Wanner ◽  
Marc Wehrhan ◽  
...  
Keyword(s):  
Water Soluble ◽  
Small Scale ◽  
Testate Amoeba ◽  
Short Term ◽  
Plant Materials ◽  
Main Driver ◽  
Key Factor ◽  
Calamagrostis Epigejos ◽  
Biogenic Silicon ◽  
Future Work

Abstract. The significance of biogenic silicon (BSi) pools as a key factor for the control of Si fluxes from terrestrial to aquatic ecosystems has been recognized for decades. However, while most research has been focused on phytogenic Si pools, knowledge of other BSi pools is still limited. We hypothesized that different BSi pools influence short-term changes in the water-soluble Si fraction in soils to different extents. To test our hypothesis we took plant (Calamagrostis epigejos, Phragmites australis) and soil samples in an artificial catchment in a post-mining landscape in the state of Brandenburg, Germany. We quantified phytogenic (phytoliths), protistic (diatom frustules and testate amoeba shells) and zoogenic (sponge spicules) Si pools as well as Tiron-extractable and water-soluble Si fractions in soils at the beginning (t0) and after 10 years (t10) of ecosystem development. As expected the results of Tiron extraction showed that there are no consistent changes in the amorphous Si pool at Chicken Creek (Hühnerwasser) as early as after 10 years. In contrast to t0 we found increased water-soluble Si and BSi pools at t10; thus we concluded that BSi pools are the main driver of short-term changes in water-soluble Si. However, because total BSi represents only small proportions of water-soluble Si at t0 (< 2 %) and t10 (2.8–4.3 %) we further concluded that smaller (< 5 µm) and/or fragile phytogenic Si structures have the biggest impact on short-term changes in water-soluble Si. In this context, extracted phytoliths (> 5 µm) only amounted to about 16 % of total Si contents of plant materials of C. epigejos and P. australis at t10; thus about 84 % of small-scale and/or fragile phytogenic Si is not quantified by the used phytolith extraction method. Analyses of small-scale and fragile phytogenic Si structures are urgently needed in future work as they seem to represent the biggest and most reactive Si pool in soils. Thus they are the most important drivers of Si cycling in terrestrial biogeosystems.

scholarly journals A method for the destruction and analysis of biogenic silicon in two Antarctic diatom species: Thalassiosira sp. and Chaetoceros brevis

2006 ◽  
Vol 19 (1) ◽  
pp. 71-77
Author(s):  
A. C. Fischer ◽  
O. M. Steinebach ◽  
K. R. Timmermans ◽  
H. T. Wolterbeek
Keyword(s):  
Diatom Species ◽  
Biogenic Silicon ◽  
Chaetoceros Brevis

Environmental geochemistry of dissolved and biogenic silicon and its nutrient limitation effects in an inland lake, China

2015 ◽  
Vol 22 (14) ◽  
pp. 11137-11147
Author(s):  
Changwei Lü ◽  
Jiang He ◽  
Bing Wang ◽  
Bin Zhou ◽  
Wei Wang ◽  
...  
Keyword(s):  
Nutrient Limitation ◽  
Environmental Geochemistry ◽  
Inland Lake ◽  
Biogenic Silicon

Synthesis of biogenic silicon/silica (Si/SiO2) nanocomposites from rice husks and wheat bran through various microorganisms

2016 ◽  
Vol 3 (8) ◽  
pp. 085026 ◽  
Author(s):  
Taranjot Kaur ◽  
Gurwinder Pal Singh ◽  
Gurneet Kaur ◽  
Sukhvir Kaur ◽  
Prabhjot Kaur Gill
Keyword(s):  
Wheat Bran ◽  
Rice Husks ◽  
Sio2 Nanocomposites ◽  
Biogenic Silicon

Morphology and Structure of Biomorphous Silica Isolated from Equisetum hyemale and Equisetum telmateia

2010 ◽  
Vol 65 (9) ◽  
pp. 1113-1120 ◽  
Author(s):  
Mike Neumann ◽  
Sandra Wagner ◽  
Robert Noske ◽  
Brigitte Tiersch ◽  
Peter Strauch
Keyword(s):  
Particle Morphology ◽  
Organic Matrix ◽  
Second Step ◽  
Perennial Plant ◽  
Equisetum Hyemale ◽  
The Family ◽  
Original Plant ◽  
Biogenic Silicon ◽  
Pre Treatment ◽  
Inorganic Matrix

The family of horsetails (Equisetaceae) is characterized through their high content of silica (SiO2), which is the highest in known vascular plants. This work has focussed on two species of this family, Equisetum hyemale and Equisetum telmateia, where the biomorphous silica is deposited basically as amorphous SiO2 in the outer epidermis of the plants. As source of SiO2, the original plant material was air-dried and carved or powdered. For the isolation process the biomaterial was pre-treated with aceotropic HCl. This pre-treatment has the advantage of the extraction of high amounts of the natural inorganic matrix. In a second step the organic matrix was removed by a thermal oxidative process in the temperature range of 275 - 1200 ◦C to isolate the biogenic silicon dioxide from the perennial plant. Parameters of time, temperature and the thermal gradient were varied to optimize the process and to get products with the highest possible surface area. Furthermore, the particle morphology of the biogenic SiO2 from leaves and stems was examined separately. The silica deposits were characterized by optical microscopy, scanning electron microscopy, infrared spectroscopy, gravimetry, nitrogen sorption analysis, and sedimentation analysis.

Underestimation of biogenic silicon flux due to dissolution in sediment trap samples

2006 ◽  
Vol 226 (3-4) ◽  
pp. 297-306 ◽  
Author(s):  
E. Bauerfeind ◽  
B.v. Bodungen
Keyword(s):  
Sediment Trap ◽  
Biogenic Silicon

scholarly journals Human appropriation of biogenic silicon – the increasing role of agriculture

2015 ◽  
Vol 30 (8) ◽  
pp. 1331-1339 ◽  
Author(s):  
Joanna C. Carey ◽  
Robinson W. Fulweiler
Keyword(s):  
Biogenic Silicon

scholarly journals How big is the influence of biogenic silicon pools on short-term changes of water soluble silicon in soils? Implications from a study of a ten-year-old plant-soil-system

2017 ◽  
Author(s):  
Daniel Puppe ◽  
Axel Höhn ◽  
Danuta Kaczorek ◽  
Manfred Wanner ◽  
Marc Wehrhan ◽  
...  
Keyword(s):  
Water Soluble ◽  
Testate Amoeba ◽  
Short Term ◽  
Soil System ◽  
Plant Soil ◽  
Main Driver ◽  
Key Factor ◽  
Calamagrostis Epigejos ◽  
Biogenic Silicon ◽  
Soluble Silicon

Abstract. The significance of biogenic silicon (BSi) pools as a key factor for the control of Si fluxes from terrestrial to aquatic ecosystems has been recognized since decades. However, while most research has been focused on phytogenic Si pools, knowledge on other BSi pools is still limited. We hypothesized different BSi pools to influence short-term changes of the water soluble Si fraction in soils to different extents. To test our hypothesis we took plant (Calamagrostis epigejos, Phragmites australis) and soil samples in an artificial catchment in a post-mining landscape in the state of Brandenburg, Germany. We quantified phytogenic (phytoliths), protistic (diatom frustules and testate amoeba shells) and zoogenic (sponge spicules) Si pools as well as Tiron extractable and water soluble Si fractions in soils at the beginning (t0) and after ten years (t10) of ecosystem development. As expected the results of Tiron extraction showed, that there are no consistent changes of the amorphous Si pool at Chicken Creek as early as after ten years. In contrast, compared to t0 we found increased water soluble Si and BSi pools at t10, thus we concluded BSi pools to be the main driver of short-term changes of water soluble Si. However, because total BSi represents only small proportions of water soluble Si at t0 (

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