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Two phenological variants of Terminalia alata coexist in a dry dipterocarp forest |
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| Authors: | Eriko Ito Sophal Chann Bora Tith Samkol Keth Chandararity Ly Phallaphearaoth Op Naoyuki Furuya Yasuhiro Ohnuki Shin’ichi Iida Takanori Shimizu Koji Tamai Naoki Kabeya Takanobu Yagi Akira Shimizu |
| Affiliation: | 1. Hokkaido Research Center, Forestry and Forest Products Research Institute (FFPRI‐HKD), 7 Hitsujigaoka, Toyohira, Sapporo, Hokkaido, Japan;2. Institute of Forest and Wildlife Research and Development (IRD), Forestry Administration, Street 1019, Phum Rongchak, Sankat Phnom Penh Thmei, Khan Sen Sok, Phnom Penh, Cambodia;3. Tohoku Research Center, Forestry and Forest Products Research Institute (FFPRI‐THK), 92‐25 Nabeyashiki, Shimokuriyagawa, Morioka, Iwate, Japan;4. Forestry and Forest Products Research Institute (FFPRI), 1 Matsunosato, Tsukuba, Ibaraki, Japan;5. Kyushu Center, Forestry and Forest Products Research Institute (FFPRI‐KYS), 4‐11‐16 Kurokami, Kumamoto, Kumamoto, Japan |
| Abstract: | Two morphological variants of Terminalia alata (Combretaceae) differed in leaf flushing phenology and spatial distribution in a Cambodian deciduous forest. The hairy‐type trees displayed leaf exchange behavior in the middle of the dry season. The glabrous type flushed new leaves 3 months after the wet season started. The leafless period of the hairy type was estimated to be <1 month, whereas that of the glabrous type lasted more than 5 months. The landscape‐scale leaf exchange behavior was similar to that of the hairy type. The two types showed clear spatial separation. The hairy type was limited to flat areas with deep soils. The dominance of the glabrous type in hilly areas with shallow soils suggests that it is adapted to water‐limited environments. The abundance of the glabrous type in hilly areas and its unique leaf phenology probably influence the carbon, energy and water balance at the landscape level. |
| Keywords: | Cambodia phenology seasonal tropical forest spatial distribution trichome water availability |