Calcium and magnesium biogeochemistry in spruce catchments underlain by felsic, mafic, and ultramafic rocks

Pavel Krám,František Veselovský,Oldřich Myška,Jan Čuřík,Jakub Hruška,Filip Oulehle,Martin Novák,William H Mcdowell,O Chudaev,Y Kharaka,O Shouakar-Stash,R Harmon,R Millot

doi:10.1051/e3sconf/20199806007

Abstract

Three small forested catchments in the Czech Republic, each underlain by chemically contrasting silicate rocks, were investigated with focus on long-term atmospheric deposition of S, and pools and fluxes of Ca and Mg. Pools of Ca and Mg reflected geological substrate (granite: Ca, Mg poor, amphibolite: Ca, Mg rich, serpentinite: Ca poor, Mg rich). Long-term fluxes of S, Ca and Mg were tightly connected.

Highlights

Biogeochemical cycling of divalent base cations is important for the environmental status of forest ecosystem as Ca [1] and Mg [2] are essential nutrients for tree growth
Atmospheric deposition [3] and chemical weathering [4] are the principal sources of dissolved Ca and Mg, and these ecosystem inputs are critical in regulating the acid-base status of soils and drainage waters [1]
Canopy throughfall was collected by 10 collectors at Lysina catchment (LYS) and Pluhův Bor (PLB) and by 5 collectors at Na Zeleném (NAZ)

Summary

Introduction

Biogeochemical cycling of divalent base cations (calcium and magnesium, Ca and Mg) is important for the environmental status of forest ecosystem as Ca [1] and Mg [2] are essential nutrients for tree growth. Complete integrated monitoring of atmospheric deposition inputs and stream water outputs started in 1991 at LYS, in 1992 in the Pluhův Bor (PLB) catchment, and in 2015 in the Na Zeleném (NAZ) catchment. Canopy throughfall was collected by 10 collectors at LYS and PLB and by 5 collectors at NAZ.

Results

Conclusion