Stand-scale transpiration estimates in a Moso bamboo forest: II. Comparison with coniferous forests

  • Komatsu H
  • Onozawa Y
  • Kume T
 et al. 
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Abstract

In western Japan, Moso bamboo (Phyllostachys pubescens) forests have been expanding by replacing surrounding vegetation such as coniferous plantation forests and natural broadleaved forests. It has been speculated that the replacement of surrounding vegetation by bamboo forests could alter the vegetation water cycle and available water resources. We quantified stand-scale transpiration (E) in a bamboo forest on the basis of sap-flux measurements and compared the E value with values for coniferous forests. The annual E was estimated to be 567 mm. Seasonal trends in E primarily corresponded to seasonal trends in the vapor pressure deficit. Annual E for the bamboo forest was higher than that for the coniferous forests by 12% of annual precipitation (P). This difference in annual E is comparable with the difference in annual interception evaporation (I) relative to P between bamboo and coniferous forests; previous studies reported lower I for bamboo forests by ∼10% of P. Thus, the sum of E and I was comparable for bamboo and coniferous forests. As this study is the first measuring E of bamboo forests, further studies are required to examine the generality of our results. © 2010 Elsevier B.V.

Author-supplied keywords

  • Moso bamboo
  • Phyllostachys pubescens
  • Sap-flux method
  • Transpiration
  • Water cycle

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Authors

  • Hikaru Komatsu

  • Yuka Onozawa

  • Tomonori Kume

  • Kenji Tsuruta

  • Tomo'omi Kumagai

  • Yoshinori Shinohara

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