Foreword to the Series Foreword Preface CHAPTER 1 GENERAL INTRODUCTION 1.1 Global CO2 flux networks 1.2 Methods used in CO2 flux estimation 1.3 Advances in CO2 flux study by ecophysiological method 1.4 Questions to be considered 1.5 Research objectives and goal0 CHAPTER 2 STUDY SITES 2.1 Environmental conditions 2.2 Stand structure and experiments 2.3 Equipments setting CHAPTER