Title |
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Effects of clear-cutting on nitrogen leaching and fine root dynamics in a cool-temperate forested watershed in northern Japan
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Creator |
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Accessrights |
open access |
Rights |
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Subject |
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Other
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fine root biomass
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Other
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nitrate
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Other
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Sasa dwarf bamboo
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Other
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soil solution
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Other
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stream chemistry
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NDC
653
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Description |
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Abstract
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Stream and soil solution chemistry, fine root biomass and soil nitrogen processing before and after clear-cutting of trees and subsequent strip-cutting of understory vegetation, dwarf bamboo (Sasa senanensis), were investigated to understand the effect of these disturbances on biogeochemical processes on forested watershed in northern Japan. Tree-cutting did not cause a significant increase of nitrate (NO3−) concentration in stream water during the growing season after the cutting. Subsequent Sasa-cutting caused significant increase of stream NO3− concentration to ca. 15 μmol L−1. There was no significant change of stream pH following both cuttings. NO3− concentration in soil solution increased after both cutting, but the change of concentration was higher (>100 μmol L−1) after the Sasa-cutting than after the tree-cutting. In a riparian conserved area, on the other hand, NO3− in soil solution remained low after tree-cutting, suggesting the riparian area acted as a NO3− sink after the tree-cutting. There was no significant change in total biomass of fine roots after the tree-cutting because of an increase in Sasa root biomass despite a decrease in tree roots. The subsequent Sasa-cutting caused a 50% decrease of fine root biomass compared to that in the un-cut Sasa site. These results suggested that nitrogen uptake by Sasa was very important in preventing nitrogen leaching after tree-cutting, and decline of this nitrogen uptake after Sasa-cutting lead to marked NO3− leaching to the stream.
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Publisher |
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Elsevier
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Date |
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Language |
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Resource Type |
journal article |
Version Type |
AM |
Identifier |
HDL
http://hdl.handle.net/2115/8541
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Relation |
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URI
http://www.sciencedirect.com/science/journal/03781127
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isVersionOf
DOI
https://doi.org/10.1016/j.foreco.2006.01.001
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Journal |
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Forest ecology and management
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Volume Number225
Issue Number1-3
Page Start257
Page End261
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File |
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Oaidate |
2023-07-26 |