Abstract

In order to answer the question as to when deforestation started and when grasslands became dominant in the Puli Basin, the Waichiataoken profile II was selected as a control site for pollen analysis. After analyzing 10,873 spores, and 19,363 pollen grains belonging to 6 families and 12 genera of Gymnosperms, 94 families and 146 genera of Dicotyledons, and 13 families and 18 genera of Monocotyledons, the author came to the conclusion that the selection of this control site was unfortunate, because the Lauro-Fagaceae forest association has constantly prevailed in this area since the upper Pliocene. The past climate is recognized as having been warm temperate from the upper Pliocene through to the Recent period (?) or Pleistocene? With slight climatic fluctuation during some periods.