Drought and acidification of a minerotrophic conifer swamp on the Precambrian Shield, Canada PDF
Preview Drought and acidification of a minerotrophic conifer swamp on the Precambrian Shield, Canada
-^^^^ DROUGHT AND ACIDIFICATION OF A MINEROTROPHIC CONIFER SWAMP ON THE PRECAMBRIAN SHIELD, CANADA NOVEMBER 1992 Environment -.1 \o\^ 2- ^1 Environnement ' Ontario ISBN 0-7778-0227-9 DROUGHT AND ACIDIHCATIONOF A MINEROTROPHIC CONIFER SWAMP ON THE PRECAMBRIAN SHIELD, CANADA NOVEMBER 1992 © Cette publication technique n'est disponible qu'en anglais. Copyright: Queen's Printer for Ontario, 1992 This publication may be reproduced for non-commercial purposes with appropriate attribution. PIBS 2175 DROUGHT AND ACIDIFICATION OF A MINEROTROPfflC CONIFER SWAMP ON THE PRECAMBRIAN SHIELD, CANADA Report prepared by: Bruce D. LaZerte Dorset Research Centre Ontario Ministry ofthe Environment P.O. Box 39 Dorset, Ontario POA lEO NOVEMBER 1992 PIBS 2175 ABSTRACT A seven year budget of a minerotrophic conifer swamp subjected to anthropogenically acidified deposition is presented. Contrary to other published studies, this swamp retains sulphate during wet years and exports it during dryyears. Base cations are almost always exported. It is predicted that if this pattern continues, the cation exchange sites of the swampwill become increasingly saturatedwith protons and alxmiinumions, and thewaters passing through the swamp will be increasingly acidified. TABLE OF CONTENTS Abstract i Table ofContents ii List ofTables iii List ofFigures iv Introduction 1 Methods 2 Errors of Method Checks 9 Results 11 Discussion 14 References 15 Appendix - Alkalinity Method 25
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