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- Title
The effects of an induced short-term drought period on the spatial variations in soil respiration measured around emergent trees in a typical bornean tropical forest, Malaysia.
- Authors
Ohashi, Mizue; Kume, Tomonori; Yoshifuji, Natsuko; Kho, Lip; Nakagawa, Michiko; Nakashizuka, Tohru
- Abstract
Background: Our previous studies documented how soil CO efflux, one of the main carbon pathways in forest ecosystems, is affected by soil moisture and forest structure in an aseasonal tropical rainforest in Borneo, Malaysia. Aim: In this study, we clarify the effect of short-term drought treatment on the spatial variation of soil CO efflux in a forest, and to interpret the changes in soil CO efflux caused by root activities. Methods: Experimental plots (15 m radius) were established around six emergent trees and a drought treatment was conducted for three of the six plots. Soil CO efflux was measured along with environmental factors and root biomass, respiration and production in each plot. Results: Soil CO efflux at 0.5 m of the emergent trees was nearly three times higher than at 5 and 10 m away from the trees. Root respiration and biomass had no correlation with the spatial variation. Soil water content decreased by nearly 30 % during the drought treatment, although soil CO efflux was unchanged between drought and control plots. Conclusions: Our result suggests a strong spatial variation exists in soil CO efflux around emergent trees, but short-term severe drought has little effect on it.
- Subjects
MALAYSIA; DROUGHTS &; the environment; SPATIAL variation; SOIL respiration measurement; TROPICAL forests; SOIL moisture; FORESTS &; forestry
- Publication
Plant & Soil, 2015, Vol 387, Issue 1/2, p337
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1007/s11104-014-2303-6