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Effect of fog on sea salt deposition on peat soil in boreal Picea glehnii forests in Ochiishi, eastern Hokkaido, Japan
Author(s) -
Iyobe Tsutomu,
Haraguchi Akira,
Nishijima Hiroki,
Tomizawa Hideo,
Nishio Fumihiko
Publication year - 2003
Publication title -
ecological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.628
H-Index - 68
eISSN - 1440-1703
pISSN - 0912-3814
DOI - 10.1046/j.1440-1703.2003.00580.x
Subject(s) - throughfall , mire , ombrotrophic , deposition (geology) , sphagnum , peat , environmental science , deciduous , canopy , acid neutralizing capacity , sea salt , chemistry , environmental chemistry , atmospheric sciences , soil water , bog , ecology , soil science , geology , aerosol , acid deposition , sediment , biology , paleontology , organic chemistry
We investigated seasonal changes in the chemical properties of precipitation (bulk deposition, throughfall and stem flow) in Picea glehnii forests and neighboring Sphagnum communities in three ombrotrophic mires in Ochiishi district, northern Japan, to clarify the contribution of fog to nutrient addition to mires. Na + and Cl – dominated the bulk deposition, followed by Mg 2+ , Ca 2+ and SO 4 2– , implying an oceanic influence on mire chemistry. Differences in chemical properties among bulk deposition, throughfall and stem flow increased with proximity to the coastline. There was little difference in electrical conductivity (EC) among bulk deposition, throughfall and stem flow during the period of high fog frequency, which was approximately 17 fog days per month from June to August, but there were large differences in EC during the period of low fog frequency, which was approximately 5 fog days per month from September to November. In general, throughfall and stem flow were enriched with Na + , Mg 2+ , Ca 2+ , Cl – and SO 4 2– at the P. glehnii canopy, and seasonal trends in ionic concentration showed almost the same trend as EC. This seasonal pattern of atmospheric deposition chemistry showed that sea salt deposition on mires depends on fog occurrence. Sea salt is washed out of the atmosphere by fog when fog covers the forest canopy and, hence, throughfall and stem flow did not lead to the enrichment of chemical constituents during passage through the canopy in these mires during the season of high fog occurrence.