Počet záznamů: 1

The evolution of the science of Bear Brook Watershed in Maine, USA

  1. 1.
    0348935 - GLU-S 2011 RIV NL eng J - Článek v odborném periodiku
    Norton, S. A. - Fernandez, I. J. - Kahl, J. S. - Rustad, L. E. - Navrátil, Tomáš - Almquist, H.
    The evolution of the science of Bear Brook Watershed in Maine, USA.
    Environmental Monitoring and Assessment. Roč. 171, 1/4 (2010), s. 3-21 ISSN 0167-6369
    Výzkumný záměr: CEZ:AV0Z30130516
    Klíčová slova: Bear Brook Watershed in Maine * acidification * stream * soil * nitrogen * sulfur * phosphorus * base cations
    Kód oboru RIV: DD - Geochemie
    Impakt faktor: 1.436, rok: 2010

    The Bear Brook Watershed in Maine, USA is a paired watershed study with chemical manipulation of one watershed (West Bear = WB) while the other watershed (East Bear = EB) serves as a reference. Characterization of hydrology and chemical fluxes occurred in1987-1989, and demonstrated the similarity of the ca. 10 ha adjacent forested watersheds. From 1989-2010 we have added 1,800 eq (NH4)2SO4 ha-1 y-1 to WB. The 20-year chemical treatment with continuous measurements of critical variables in both watersheds has enabled the identification of decadal long processes, including declining SO4-2 in precipitation and in EB, evolving soil mechanisms that resist pH decrease, loss of soil base saturation, dramatically altered P biogeochemistry, unexpected mechanisms of storage of treatment S, and continuous high retention of treatment N.
    Trvalý link: http://hdl.handle.net/11104/0189316