Journal ArticleDOI
Phragmites australis and silica cycling in tidal wetlands
Eric Struyf,Eric Struyf,Stefan Van Damme,Britta Gribsholt,K. Bal,Olivier Beauchard,Jack J. Middelburg,Patrick Meire +7 more
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TLDR
In this article, the role of vegetation in the dissolution of dissolved Si from R australis stems has been quantified, showing that vegetation contributes to and enhances dissolved Si recycling capacity of tidal marshes: in a reeddominated small freshwater tidal marsh, more than 40% of DSi export was attributable to reed decomposition.About:
This article is published in Aquatic Botany.The article was published on 2007-08-01. It has received 89 citations till now. The article focuses on the topics: Phragmites & Salt marsh.read more
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Tracing the origin of dissolved silicon transferred from various soil-plant systems towards rivers: a review
TL;DR: In this paper, the authors identify relevant geochemical tracers of Si pathways within the soil-plant system to obtain a better understanding of the origin of DSi exported towards rivers.
Journal ArticleDOI
Biogenic silica: a neglected component of the coupled global continental biogeochemical cycles of carbon and silicon
Abstract: On geological time-scales (≥106 years), the global geochemical cycles of carbon and silicon are coupled by the drawdown of atmospheric CO2 through chemical weathering of Ca- and Mg-silicate minerals in continental rocks. Rivers transport the soluble products of weathering (cations, alkalinity and silicic acid) to the oceans, where they are utilized by marine ecosystems. On decadal to glacial–interglacial time-scales, however, large biotic fluxes and storages of Si within terrestrial and freshwater ecosystems need to be taken into account. Recent studies have emphasized the importance of Si-accumulating plants, which deposit significant amounts of amorphous hydrated silica in their tissues as opal phytoliths. These include grasses, sedges, palms, some temperate deciduous trees and conifers, and many tropical hardwoods. Landscapes dominated by accumulator plants, such as tropical rainforests, grasslands, herbaceous wetlands and bamboo forests, act as ‘silica factories’. Important ‘silica bioengineers’ in freshwater ecosystems comprise diatoms, sponges and chrysophytes. This paper reviews the biological role of Si in higher plants, the impact of vegetation on rates of chemical weathering, the fluxes of Si through catchment ecosystems, lakes and rivers, and the potential contribution of new geochemical and isotopic tracers to Si biogeochemistry. Multiproxy investigations of lake sediments will provide novel insights into past variations in Si biocycling from terrestrial to aquatic realms on 10–106 year time-scales. Copyright © 2008 John Wiley & Sons, Ltd.
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Silica uptake in aquatic and wetland macrophytes: a strategic choice between silica, lignin and cellulose?
TL;DR: Investigation of biogenic silica, cellulose and lignin content of 16 aquatic/wetland species along the Biebrza river in Poland in June 2006 and 2007 concludes that macrophytes have an overlooked but potentially vast storage capacity for Si.
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Silica: an essential nutrient in wetland biogeochemistry
TL;DR: In this article, the authors show that wetland ecosystems may be as important for Si transport and processing as they are for other important biogeochemical cycles, such as nitrogen and phosphorus cycling.
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Silicon availability modifies nutrient use efficiency and content, C:N:P stoichiometry, and productivity of winter wheat (Triticum aestivum L.).
TL;DR: The results revealed that Si is readily taken up and accumulated basically in aboveground vegetative organs and this implies fundamental influences of Si on C turnover, P availability and nitrogen use efficiency for wheat as a major staple crop.
References
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R: A Language for Data Analysis and Graphics
Ross Ihaka,Robert Gentleman +1 more
TL;DR: In this article, the authors discuss their experience designing and implementing a statistical computing language, which combines what they felt were useful features from two existing computer languages, and they feel that the new language provides advantages in the areas of portability, computational efficiency, memory management, and scope.
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The supply and accumulation of silica in the marine environment
TL;DR: For example, the accumulation of biogenic silica in estuarine deposits removes a maximum of 8 × 1014g SiO2/yr or 10% of the dissolved silica input to the oceans as mentioned in this paper.
Cryptic invasion by a non-native genotype of the common reed, Phragmites australis, into
TL;DR: Results indicate that an introduction of a non-native strain of Phragmites has occurred, and the introduced type has displaced native types as well as expanded to regions previously not known to have PhragMites.
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Cryptic invasion by a non-native genotype of the common reed, Phragmites australis, into North America
TL;DR: The distribution and abundance of Phragmites australis in North America has increased dramatically over the past 150 years as mentioned in this paper, and the hypothesis that a non-native strain of Phagmites is responsible for the observed spread is tested.