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

Mizue Ohashi, Tomonori Kume, Natsuko Yoshifuji, Lip Khoon Kho, Michiko Nakagawa, Tohru Nakashizuka

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    Aim: In this study, we clarify the effect of short-term drought treatment on the spatial variation of soil CO2 efflux in a forest, and to interpret the changes in soil CO2 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 CO2 efflux was measured along with environmental factors and root biomass, respiration and production in each plot.

    Results: Soil CO2 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 CO2 efflux was unchanged between drought and control plots.

    Background: Our previous studies documented how soil CO2 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.

    Conclusions: Our result suggests a strong spatial variation exists in soil CO2 efflux around emergent trees, but short-term severe drought has little effect on it.

    Original languageEnglish
    Pages (from-to)337-349
    Number of pages13
    JournalPlant and Soil
    Volume387
    Issue number1-2
    DOIs
    Publication statusPublished - 2014 Jan 1

    Keywords

    • Drought treatment
    • Emergent tree
    • Short-term monitoring
    • Soil CO efflux
    • Tropical forest

    ASJC Scopus subject areas

    • Soil Science
    • Plant Science

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