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Spatial and temporal variation of soil solution chemistry and ion fluxes through the soil in a mature Norway spruce (Picea abies (L.) Karst.) stand

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Manderscheid, Bernhard ; Matzner, Egbert:
Spatial and temporal variation of soil solution chemistry and ion fluxes through the soil in a mature Norway spruce (Picea abies (L.) Karst.) stand.
In: Biogeochemistry. Bd. 30 (1995) Heft 2 . - S. 99-114.
ISSN 1573-515X
DOI: https://doi.org/10.1007/BF00002726

Abstract

In this study we investigated the spatial and temporal variation in soil solutionchemistry and of water and ion fluxes through the soil in a forest ecosystem. Our aim wasto evaluate the relevance of these variations for the accuracy of average area1 soil solutionconcentrations and ion fluxes with seepagea t 90 cm depth.Twenty spatially distinct ‘subcompartments’ of approximately 1 m2 were established withina mature stand of Norway spruce and ceramic suction lysimeters were installed at depths of 20,35 and 90 cm. A tensiometer was placed close to each suction lysimeter, and one throughfallsampler was established for each subcompartment.Soil solution samples were analysed for major ions (H+, Nat, Kt , Cazt , Mg*+ , Mnzt ,Fe3+,A 13+,C l-, NO,, SO:-). We calculatedw ater fluxes for eachs ubcompartmenst eparatelyby a numeric simulation of the soil water flux close to the lysimetets. The ion fluxes at eachlysimeter were calculated by multiplying the simulated water fluxes with the ion concentrationson a fortnightly base. Averaging these 20 independent ion fluxes gave the area1 average fluxand an estimate of its statistical accuracy.The spatial variation of ion concentrations in the soil solution was high with coefficientsof variance ranging from 5% to 128%. Part of the spatial variation was related to stemdistance. Temporal variation of the concentrations was less than spatial for most ions. Thespatial variation of water and ion fluxes with seepage was also substantial; for exam le thefluxes of SOi--S calculated for each subcompartmentr anged from 21 to 119 kg ha- P yr -I ,with an arithmetic average of 47 kg ha-’ yr-‘. For HrO, Mg2+, Cl-, and SO:-, the spatialheterogeneity of seepage fluxes was largely explained by the heterogeneity of throughfallfluxes. No such relationship was found for nitrogen.Despite using 20 replicates,t he 95% confidencei ntervals of the averagea nnuala rea1fl uxeswith seepagew ere found to be 20-30% for most ions.Key words: forest, ion budgets, seepageoutput, soil solution, spatial variation, throughfallIntroductionNumerous papers have been published on soil solution chemistry, ion fluxeswith percolation water and on element budgets of terrestrial ecosystems overthe last three decades (for overview see Harrison et al. 1989). However, littleattention has been given to the problem of spatial variation of soil solutionconcentrations and water fluxes in the soil and their relevance for the accuracy

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER6985
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Ehemalige Professoren > Lehrstuhl Bodenökologie - Univ.-Prof. Dr. Egbert Matzner
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 13 Aug 2015 06:12
Letzte Änderung: 13 Aug 2015 06:12
URI: https://eref.uni-bayreuth.de/id/eprint/18102