Interannual variation in transpiration onset and its predictive indicator for a tropical deciduous forest in northern Thailand based on 8‐year sap‐flow records

Yoshifuji, Natsuko; Komatsu, Hirokazu; Kumagai, Tomo’omi; Tanaka, Nobuaki; Tantasirin, Chatchai; Suzuki, Masatoshi

doi:10.1002/eco.219

Cited by 20 publications

(13 citation statements)

References 40 publications

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“…The former peak pertains to years in which the wet season is not consistently wet, causing early leaf loss. The patterns in Figure are similar to those observed in other SDEs (Yoshifuji et al , ).…”

Section: Quantitative Assessment Of Phenological Strategiessupporting

confidence: 89%

Climatic, ecophysiological, and phenological controls on plant ecohydrological strategies in seasonally dry ecosystems

et al. 2014

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Large areas in the tropics and at mid‐latitudes experience pronounced seasonality and inter‐annual variability in rainfall and hence water availability. Despite the importance of these seasonally dry ecosystems (SDEs) for the global carbon cycling and in providing ecosystem services, a unifying ecohydrological framework to interpret the effects of climatic variability on SDEs is still lacking. A synthesis of existing data about plant functional adaptations in SDEs, covering some 400 species, shows that leaf phenological variations, rather than physiological traits, provide the dominant control on plant‐water‐carbon interactions. Motivated by this result, the combined implications of leaf phenology and climatic variability on plant water use strategies are here explored with a minimalist model of the coupled soil water and plant carbon balances. The analyses are extended to five locations with different hydroclimatic forcing, spanning seasonally dry tropical climates (without temperature seasonality) and Mediterranean climates (exhibiting out of phase seasonal patterns of rainfall and temperature). The most beneficial leaf phenology in terms of carbon uptake depends on the climatic regime: evergreen species are favoured by short dry seasons or access to persistent water stores, whereas high inter‐annual variability of rainy season duration favours the coexistence of multiple drought‐deciduous phenological strategies. We conclude that drought‐deciduousness may provide a competitive advantage in face of predicted declines in rainfall totals, while reduced seasonality and access to deep water stores may favour evergreen species. This article has been contributed to by US Government employees and their work is in the public domain in the USA.

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Section: Quantitative Assessment Of Phenological Strategiessupporting

confidence: 89%

Climatic, ecophysiological, and phenological controls on plant ecohydrological strategies in seasonally dry ecosystems

et al. 2014

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“…The discrepancy was also found in March-May of 2003 and 2004. The period between March and May corresponded to a leaf unfolding period according to the LAI measurements (Yoshifuji et al, 2006(Yoshifuji et al, , 2011. The LAI in the period between March and May of 2001-2004 ranged between 0 and 2.0 m 2 m À2 , whereas the LAI in the growing season between June and October was 2.5-3.5 m 2 m À2 (Yoshifuji et al, 2011).…”

Section: Seasonal Variationmentioning

confidence: 99%

Soil respiration in response to year‐to‐year variations in rainfall in a tropical seasonal forest in northern Thailand

et al. 2012

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In a tropical deciduous forest in northern Thailand, an area affected by the Asian monsoon, we made soil respiration measurements for 4 years to determine their inter‐annual variability. We also made continuous measurements of soil moisture, soil temperature, and soil CO2 concentration. Annual soil respiration rates were estimated using two methods: multiple regression analysis and Fick's first law of diffusion. During the study period, between June 2000 and December 2004, the annual rainfall and the length of the wet period showed considerable year‐to‐year variation, differing by 1162–1435 mm year−1 falling over 146–189 days, respectively. In response to the inter‐annual variability in rainfall, annual soil respiration rates estimated by the two models also showed large inter‐annual variations for the 4 years (coefficient of variation = 14–17%). The range in the inter‐annual variation for soil respiration was comparable with values for net ecosystem exchange reported in other Southeast Asian tropical forests. Historical rainfall records at this site showed further large inter‐annual variations that occurred in times other than in the study period, suggesting that long‐term monitoring would be required for a better understanding of the C balance at this site. Copyright © 2012 John Wiley & Sons, Ltd.

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“…How SFD changes with the level of canopy leaf shedding in teak through the dry season is unclear. Yoshifuji et al () found that interannual variation in the onset of transpiration of a mature plantation in Thailand was linked with soil water and variation in LAI. Increasing stand transpiration in the year with larger annual rainfall was also reported in a rubber plantation in Cambodia (Kobayashi et al, ).…”

Section: Discussionmentioning

confidence: 99%

Does fluctuation of meteorological conditions across years influence stand transpiration of Tectona grandis plantation?

et al. 2019

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Tectona grandis (teak) is widely planted as high-quality timber in the seasonal tropics, yet detailed data on its seasonal water use and the effect of climatic fluctuations on its transpiration behaviour are limited. We measured sap flux density (SFD) using Granier's sap flow sensors for three wet and two dry seasons in the years 2012, 2014, and 2015 (wet season only) in 7 to 14 trees and made a calibration of Granier's equation for teak to calculate SFD for estimating whole-tree water consumption and stand-level transpiration. We also characterized the effects of daily rainfall, vapour pressure deficit, and photosynthetically active radiation on the daily SFD of individual trees. We found a large fluctuation in rainfall in the wet seasons of 2012 to 2015 (1,159 mm in 2012, 778 mm in 2014, and 727 mm in 2015). Total wet and dry season stand-level transpiration were 824 and 501 mm in 2012 and 446 and 214 mm in 2014, respectively, whereas the wet season transpiration of 2015 was 358 mm.Namely, reduced wet season rainfall reduced the total stand-level transpiration of teak at the study site. Most variations in daily SFD were due to differences in meteorological conditions, that is, day-time mean vapour pressure deficit, photosynthetically active radiation, and daily rainfall associated with the seasons of particular year. We also established models to estimate the stand-level transpiration of a teak plantation. The findings of the present study could be useful for forestation program and hydrological management in tropical regions with seasonal drought. KEYWORDS photosynthetically active radiation, rainfall fluctuation, sap flux density, timber plantation, vapour pressure deficit, water use

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Interannual variation in transpiration onset and its predictive indicator for a tropical deciduous forest in northern Thailand based on 8‐year sap‐flow records

Cited by 20 publications

References 40 publications

Climatic, ecophysiological, and phenological controls on plant ecohydrological strategies in seasonally dry ecosystems

Climatic, ecophysiological, and phenological controls on plant ecohydrological strategies in seasonally dry ecosystems

Soil respiration in response to year‐to‐year variations in rainfall in a tropical seasonal forest in northern Thailand

Does fluctuation of meteorological conditions across years influence stand transpiration of Tectona grandis plantation?

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