Podrobnosti záznamu

    Sulfur isotope inventories of atmospheric deposition, spruce forest floor and living Sphagnum along a NW-SE transect across Europe
Údaj o odpovědnosti
    Martin Novák, Simon H. Bottrell, Eva Přechová
    Bottrell, Simon H.
    Novák, Martin, 1959-
    Přechová, Eva
Zdrojový dokument - seriál
    Vol. 53, no. 1
    p. 23-50
    8 obr., 7 tab., 4 s.bibl.
    Zkr. název ser.: Biogeochemistry
Předmětová skupina
    atmosférická depozice
    geochemie izotopická
    izotopy S
Geografické jméno
    Krušné hory
    Modrava (Klatovy)
    Velká Británie
Klíčové slovo
Abstrakt (anglicky)
   At five European sites, differing in atmospheric S inputs by a factor of 6, and differenting in S isotope signatures of these inputs by up to 14%. (CDT), we investigated the direction and magnitude of an assimilation-related delta 34S shift and the relationship between atmospheric deposition and S retention in selected ecosystem compartments. Bulk precipitation and spruce throughfall were collected between 1994 and 1996 in the Isle of Mull (Scotland), Connemara (Ireland), Thorne Moors (England), Rybárenská slač and Oceán (both Czech republic) and analyzed for sulfate concentrations and Ű34S ratios. Eighteen replicate samples per site of living Sphagnum collected in unforested peatlands and 18 samples of spruce forest floor collected near each of the peatlands were also analysed for S concentrations and delta 34S ratios. Assimilation of S was associated with a negative delta 4S shift. Plant tissues systematically preferred the light isotope 32S, on average by 2%..
   There was a strong positive correlation between the non-marine portion of the atmospheric S input and total S concentration in forest floor and Sphagnum, respectively (R = 0.97 and R = 0.85). Elevetaed S inputs lead to higher S retention in these two organic-rich compartments of the ecosystem. It follows that equal emphasis mus t be placed on organic S as on adsorption/desorption of inorganic sulfate when studying acidification reversal in ecosystems. The sea-shore sites had rainfall enriched in the heavy isotope 34S due to an admixture of sea-spray
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
Datum vložení
    30. 3. 2009
Datum importu
    8. 8. 2012