Record details

    The Covered Catchment Site : A Description of the Physiography, Climate and Vegetation of Three Small Coniferous Forest Catchments at Gardsjön, South-west Sweden
Statement of responsibility
    B. Ingvar Andersson, Kevin H. Bishop, Gunnar Ch. Borg, Reiner Giesler, Hans Hultberg, Magne Huse, Filip Moldan, Lars Nyberg, Per Holm Nygaard, Ulf Nyström
    Andersson, B. Ingvar
    Bishop, Kevin H.
    Borg, Gunnar Ch.
    Giesler, Reiner
    Hultberg, Hans
    Huse, Magne
    Moldan, Filip
    Nyberg, Lars
    Nygaard, Per Holm
    Nyström, Ulf
Source title - monograph
    Experimental reversal of Acid Rain Effects: The Gardsjön Roof Project
    s. 25-70
    20 obr., 11 tab., 4 s.bibl.
Subject group
    kyselý déšť
    malé povodí
Geographical name
Abstract (in english)
   This chapter contains a description of the main features of the small catchments at Gardsjön used for the Roof project and related NITREX project. Descriptions are given of the topography, geology, climate, hydrology, soils and vegetation. The elemental contents of various ecosystem compartments are tabulated for the three catchments and an assessment made of their relationships to other European and North American ecosystems. The location of lake Gardsjön on igneous, rather acid bedrock with very thin soils of local origin and a mineral composition having slow to normal weathering rate renders this south-west Swedish forest land sensitive to acidification.
   Mature (80 to 100 years old) forest with Norway spruce (Picea abies (L.) Karst.) and some Scots pine (Pinus sylvestri L.) predominate while in the ground layer dwarf shrubs (mainly Vaccinium myrtillus L.) mixed or alternating with several species of mosses and the grass Dechampsia flexuosa constitute the most abundant vegetation elements in the catchment area surroundings Lake Gardsjön. Generally podzolic soils of sandy to silty loam with only a small clay content occur interspersed with typical folisols on steep slopes or ridge areas and peaty soils in the valley bottoms of the larger catchments. Annual precipitation amounts to c.1150 mm and runoff is c.580 mm, the climate being pronouncedly maritime with February as the coldest (-2.7°C) month and July the warmest (+16.0°C). Some precipitation occurs on almost 150 days of the year, though the typical rain intensity is fairly low (1.5 mm h-1), ussually lasting for several hours and caused by cyclonic weather systems.
   The acidified soils have large amounts of exchangeable acidity and aluminium, while stores of exchangeable base cations are modest, resulting in a comparatively low base saturation. Acid deposition has resulted in substantial amounts of sulphur and nitrogen being stored in the soil profile, and the future response of the different fractions of these elements will be of importance for the recovery from acidification when loading decreases. The presence of numerous small sub-catchments, relatively high rainfall and good homogeneity between catchments make the Gardsjön area suitable for manipulative catchment research
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    18. 2. 2008
Import date
    8. 8. 2012