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Impacts of changes in vegetation on saturated hydraulic conductivity of soil in subtropical forests
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Impacts of changes in vegetation on saturated hydraulic conductivity of soil in subtropical forests
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Journal Article
Impacts of changes in vegetation on saturated hydraulic conductivity of soil in subtropical forests
2019
Overview
Saturated hydraulic conductivity (
K
s
) is one of the most important soil properties that determines water flow behavior in terrestrial ecosystems. However, the
K
s
of forest soils is difficult to predict due to multiple interactions, such as anthropological and geomorphic processes. In this study, we examined the impacts of vegetation type on
K
s
and associated mechanisms. We found that
K
s
differed with vegetation type and soil depth, and the impact of vegetation type on
K
s
was dependent on soil depth.
K
s
did not differ among vegetation types at soil depths of 0–10 and 20–30 cm, but was significantly lower in managed forest types (mixed evergreen broad-leaved and coniferous forests, bamboo forests, and tea gardens) than native evergreen broadleaf forests at a depth of 10–20 cm. Boosted regression tree analysis indicated that total porosity, non-capillary porosity, and macro water-stable aggregates were the primary factors that influenced
K
s
. Our results suggested that vegetation type was a key factor that influences hydraulic properties in subtropical forest soils through the alteration of soil properties, such as porosity and macro water-stable aggregates.
