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Daniel Conley

Daniel Conley

Professor

Daniel Conley

Deforestation causes increased dissolved silicate losses in the Hubbard Brook Experimental Forest

Författare

  • Daniel Conley
  • Gene E. Likens
  • Donald C. Buso
  • Loredana Saccone
  • Scott W. Bailey
  • Chris E. Johnson

Summary, in English

Globally significant increases in the riverine delivery of nutrients and suspended particulate matter have occurred with deforestation. We report here significant increases in streamwater transport of dissolved silicate (DSi) following experimental forest harvesting at the Hubbard Brook Experimental Forest, NH, USA. The magnitude of the streamwater response varied with the type of disturbance with the highest DSi export fluxes occurring in the manipulations that left the most plant materials on the soil surface and disturbed the soil surface least. No measurable loss of amorphous silica (ASi) was detected from the soil profile; however, ASi was redistributed within the soil profile after forest disturbance. Mass-balance calculations demonstrate that some fraction of the DSi exported must come from dissolution of ASi and export as DSi. Land clearance and the development of agriculture may result in an enhanced flux of DSi coupled with enhanced erosion losses of ASi contained in phytoliths.

Avdelning/ar

  • Kvartärgeologi

Publiceringsår

2008

Språk

Engelska

Sidor

2548-2554

Publikation/Tidskrift/Serie

Global Change Biology

Volym

14

Issue

11

Dokumenttyp

Artikel i tidskrift

Förlag

Wiley-Blackwell

Ämne

  • Geology

Nyckelord

  • balance
  • mass
  • Hubbard Brook
  • deforestation
  • amorphous silica
  • biogeochemistry
  • streamwater export

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1354-1013