Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Budgets of Aluminium Species, Iron and Manganese in the Lake Gårdsjön Catchment in SW Sweden

S. Ingvar Nilsson
Ecological Bulletins
No. 37, Lake Gårdsjön: An Acid Forest Lake and Its Catchment (1985), pp. 120-132
Published by: Oikos Editorial Office
Stable URL: http://www.jstor.org/stable/20112941
Page Count: 13
  • Read Online (Free)
  • Download ($10.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Budgets of Aluminium Species, Iron and Manganese in the Lake Gårdsjön Catchment in SW Sweden
Preview not available

Abstract

Fluxes of aluminium, partitioned into dissolved inorganic and organic complexes, and of iron and manganese were measured during two consecutive hydrological years in a catchment on the Swedish west coast. The area is characterized by acid lakes, the surrounding terrestrial parts of the catchment being dominated by shallow podzolic soils with significant inclusions of barren rock and peat soils. Budget calculations for one of the lakes (Lake Gårdsjön), with an average pH of 4.66, indicated an aluminium retention in the lake varying between -0.2 and 8.0 kg $\text{ha}^{-1}\text{yr}^{-1}$ depending on the actual year and on the mode of calculation. The calculated retention of organic aluminium species was 3.1-7.9 kg $\text{ha}^{-1}\text{yr}^{-1}$. Likewise there was a retention of iron (6.0-6.4 kg $\text{ha}^{-1}\text{yr}^{-1}$), while manganese showed an apparent net release (4.9-5.1 kg $\text{ha}^{-1}\text{yr}^{-1}$). The aluminium fluxes were mainly regulated by complex formation with fulvic acids in the organic top soil and by the sulphate concentration in the mineral soil through equilibria with two basic aluminium sulphates (Al(OH)SO₄ and $\text{Al}_{4}(\text{OH})_{10}\text{SO}_{4}$). In the streamwater the measured concentrations could not be uniquely ascribed to any specific equilibrium reaction, although the gibbsite equilibrium was approached during baseflow conditions. Rather few comparable studies exist, but a data compilation showed that the average concentrations were in good agreement with measurements by other authors in catchments both with and without lakes.

Page Thumbnails

  • Thumbnail: Page 
120
    120
  • Thumbnail: Page 
121
    121
  • Thumbnail: Page 
122
    122
  • Thumbnail: Page 
123
    123
  • Thumbnail: Page 
124
    124
  • Thumbnail: Page 
125
    125
  • Thumbnail: Page 
126
    126
  • Thumbnail: Page 
127
    127
  • Thumbnail: Page 
128
    128
  • Thumbnail: Page 
129
    129
  • Thumbnail: Page 
130
    130
  • Thumbnail: Page 
131
    131
  • Thumbnail: Page 
132
    132