Water relations of evergreen and drought-deciduous trees along a seasonally dry tropical forest chronosequence.

Oecologia
Niles J HasselquistLouis S Santiago

Abstract

Seasonally dry tropical forests (SDTF) are characterized by pronounced seasonality in rainfall, and as a result trees in these forests must endure seasonal variation in soil water availability. Furthermore, SDTF on the northern Yucatan Peninsula, Mexico, have a legacy of disturbances, thereby creating a patchy mosaic of different seral stages undergoing secondary succession. We examined the water status of six canopy tree species, representing contrasting leaf phenology (evergreen vs. drought-deciduous) at three seral stages along a fire chronosequence in order to better understand strategies that trees use to overcome seasonal water limitations. The early-seral forest was characterized by high soil water evaporation and low soil moisture, and consequently early-seral trees exhibited lower midday bulk leaf water potentials (Ψ(L)) relative to late-seral trees (-1.01 ± 0.14 and -0.54 ± 0.07 MPa, respectively). Although Ψ(L) did not differ between evergreen and drought-deciduous trees, results from stable isotope analyses indicated different strategies to overcome seasonal water limitations. Differences were especially pronounced in the early-seral stage where evergreen trees had significantly lower xylem water δ(18)O values relat...Continue Reading

References

Mar 26, 2003·Tree Physiology·Paula C. JacksonFabio Causin
Jan 11, 2007·Plant Physiology·Graham D FarquharBelinda Barnes
Jan 12, 2007·Oecologia·José Ignacio QuerejetaJuan José Jiménez-Osornio
Jan 29, 2008·Oecologia·Ulli SeibtJoseph A Berry
May 13, 2009·The New Phytologist·Rodrigo VargasMichael F Allen
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Citations

Mar 11, 2017·Scientific Reports·Jaivime Evaristo, Jeffrey J McDonnell
Mar 5, 2019·Ecology Letters·Jesús Aguirre-GutiérrezYadvinder Malhi
Jun 10, 2020·Functional Plant Biology : FPB·Débora di FrancescantonioPaula I Campanello
Apr 25, 2021·Plant Physiology·Peipei ZhangVanessa L Bailey
Jun 16, 2021·PloS One·Mayra Flores-TolentinoJosé Luis Villaseñor
Jun 26, 2021·The New Phytologist·German Vargas GJennifer S Powers

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