Crown condition and needle chemistry of Norway spruce in relation to critical loads of acidity in south-east Norway

This study shows that it is questionable if critical load modelling can contribute in the search for harmful effects of acid deposition on forest health at present. Critical loads forS and N deposition were calculated using the MAGIC and PROFILE models for more than 100 monitoring plots in Norway sp...

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Published in:Water, air, and soil pollution air, and soil pollution, 2002-10, Vol.140 (1-4), p.157-171
Main Authors: SOLBERG, Svein, KVINDESLAND, Sheila, AAMLID, Dan, VENN, Kare
Format: Article
Language:English
Subjects:
Acid deposition
Acidity
Aluminum
Animal, plant and microbial ecology
Applied ecology
Applied sciences
Biological and medical sciences
Earth sciences
Earth, ocean, space
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on plants and fungi
Engineering and environment geology. Geothermics
Environmental monitoring
Exact sciences and technology
Forests
Fundamental and applied biological sciences. Psychology
Global environmental pollution
Picea abies
Pine needles
Pine trees
Pollutant deposition
Pollution
Pollution, environment geology
Soil solution
Studies
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Summary:This study shows that it is questionable if critical load modelling can contribute in the search for harmful effects of acid deposition on forest health at present. Critical loads forS and N deposition were calculated using the MAGIC and PROFILE models for more than 100 monitoring plots in Norway spruce forestin south-east Norway. The two models gave different results, likely due to differences in the models, including differences in the time spans applied. The PROFILE model gave considerably more plots with exceedance than the MAGIC model.At plots where the CL was exceeded, calcium/aluminium (Ca/Al) ratios in the soil solutions were low. However, very few of theseplots had possible harmful values of the Ca/Al-ratio. More than 50 yr seems in most cases to be needed to bring Ca/Al ratios below 1.0. Present deposition was better correlated with measured forest condition variables such as crown condition and needle chemistry,than with modelled exceedance according to any of the two methods. The deposition of S and N was weakly, negatively correlated to foliar concentrations of P and Ca, and positivelyto foliar N concentrations and crown density.[PUBLICATION ABSTRACT]
ISSN:0049-6979
1573-2932
DOI:10.1023/A:1020131307937