Soil depth and soil water regime in a catchment where tropical dry evergreen and deciduous forests coexist |
| |
| Authors: | Naoki Murata Seiichi Ohta Atsushi Ishida Mamoru Kanzaki Chongrak Wachirinrat Taksin Artchawakom Hiroyuki Sase |
| |
| Institution: | (1) Graduate School of Agriculture, Kyoto University, Kyoto, Japan;(2) Department of Plant Ecology, Forestry and Forest Products Research Institute (FFPRI), Tsukuba, Japan;(3) Department of Silviculture, Faculty of Forestry, Kasetsart University, Bangkok, Thailand;(4) Sakaerat Environmental Research Station, Nakhon Ratchasima, Thailand;(5) Acid Deposition and Oxidant Research Center (ADORC), Niigata, Japan;(6) Laboratory of Revegetation Sciences, Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori 680-0001, Japan |
| |
| Abstract: | In several areas in Northeast Thailand, evergreen and deciduous forests coexist under uniform climatic conditions. To identify
the factors that determine the distribution of these different forest types, we compared soil depth and soil physical properties
between evergreen and deciduous forests, and monitored soil moisture conditions for a year in both forest types at the Sakaerat
Environmental Research Station. The soil was significantly deeper under the evergreen forests (mean 97 cm) than under the
deciduous forest (mean 64 cm). The soil under the evergreen forests retained much more water throughout the year than the
soil under the deciduous forest, and there was also a clear tendency for the evergreen forests to occur in ravine areas, regardless
of soil depth. It is possible that the evergreen trees can maintain transpiration during the dry season on thicker soils or
in ravine areas, whereas shallower soils cannot provide enough water for these trees to maintain their evapotranspiration
during the dry period. From the present study, we showed that soil water availability could be a significant factor determining
the distribution of the deciduous and evergreen forests in our catchments. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
