Seasonal variation in the atmospheric deposition of inorganic constituents and canopy interactions in a Japanese cedar forest.
Environ Pollut
; 152(1): 1-10, 2008 Mar.
Article
em En
| MEDLINE
| ID: mdl-17658672
ABSTRACT
The seasonal changes in throughfall (TF) and stemflow (SF) chemistry and the canopy interactions of K+ and N compounds were studied in a Japanese cedar forest near the Sea of Japan. The fluxes of most ions, including non-sea-salt SO4(2-), from TF, SF, and rainfall showed distinct seasonal trends, increasing from autumn to winter, owing to the seasonal west wind, while the fluxes of NH4+ and K+ ions from TF+SF might have a large effect of canopy interactions. The contact angle (CA) of water droplets on leaves decreased with leaf aging, suggesting that surface wettability increases with leaf age. The K+ concentration in TF was negatively correlated with the CA of 1-year-old leaves, while the NH4+ concentration was positively correlated with the CA. The net fluxes of NH4+ and NO3(-) from TF were positively correlated with the CA. The increase in wettability may accelerate leaching of K+ or uptake of NH4+.
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Base de dados:
MEDLINE
Assunto principal:
Estações do Ano
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Árvores
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Monitoramento Ambiental
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Cryptomeria
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Poluentes Atmosféricos
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article