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Landscape cultivation alters ?³?Si signature in terrestrial ecosystems.

ABSTRACT: Despite increasing recognition of the relevance of biological cycling for Si cycling in ecosystems and for Si export from soils to fluvial systems, effects of human cultivation on the Si cycle are still relatively understudied. Here we examined stable Si isotope (?(30)Si) signatures in soil water samples across a temperate land use gradient. We show that - independent of geological and climatological variation - there is a depletion in light isotopes in soil water of intensive croplands and managed grasslands relative to native forests. Furthermore, our data suggest a divergence in ?(30)Si signatures along the land use change gradient, highlighting the imprint of vegetation cover, human cultivation and intensity of disturbance on ?(30)Si patterns, on top of more conventionally acknowledged drivers (i.e. mineralogy and climate).

SUBMITTER: Vandevenne FI

PROVIDER: S-EPMC4291558 | biostudies-literature | 2015 Jan

REPOSITORIES: biostudies-literature

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Landscape cultivation alters δ³⁰Si signature in terrestrial ecosystems.

Vandevenne Floor I FI Delvaux Claire C Hughes Harold J HJ André Luc L Ronchi Benedicta B Clymans Wim W Barão Lúcia L Govers Gerard G Meire Patrick P Struyf Eric E Cornelis Jean-Thomas JT

Scientific reports 20150113

Despite increasing recognition of the relevance of biological cycling for Si cycling in ecosystems and for Si export from soils to fluvial systems, effects of human cultivation on the Si cycle are still relatively understudied. Here we examined stable Si isotope (δ(30)Si) signatures in soil water samples across a temperate land use gradient. We show that - independent of geological and climatological variation - there is a depletion in light isotopes in soil water of intensive croplands and mana ...[more]

PMID: 25583031

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