Structure And Tree Species Diversity Of Tropical Moist Evergreen Broadleaf Forest In Tam Duong District Lai Chau Province

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ACKNOWLEDGEMENT

First of all, I want to express my gratefulness to teachers of Vietnam National

University of Forestry for establishing me to complete this research. I would like to thank all

the officers of Tam Duong District, Lai Chau Province for supporting necessary things and

providing me documents. I take this opportunity to record my sincere thanks to all the faculty

members of the Faculty of Forest Resource and Environment Management for their help and

encouragement. I am deeply indebted to my supervisor Dr. Cao Thi Thu Hien whose

stimulating motivation and valuable ideas help me to complete this research. I also thank Tam

Duong local government and local people for helping me during our researching time in Tam

Duong District, Lai Chau Province.

Hanoi, September 2019

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CONTENTS

ACKNOWLEDGEMENT....................................................................................................i

CONTENTS .........................................................................................................................ii

LIST OF TABLES ..............................................................................................................iv

LIST OF FIGURES ............................................................................................................. v

ABSTRACT ........................................................................................................................ vi

CHAPTER I INTRODUCTION ......................................................................................... 1

CHAPTER II LITERATURE REVIEW ............................................................................ 4

2.1. In the world ................................................................................................................... 4

2.1.1 Structural composition ................................................................................................. 4

2.1.2 The distributed structure of trees by diameter .............................................................. 5

2.1.3. Species diversity research ............................................................................................ 6

2.2. In Vietnam..................................................................................................................... 7

2.2.1. Structural composition ................................................................................................ 7

2.2.2. The role of distribution trees by diameter (N / D1.3)................................................... 9

2.2.3. Research on tree species diversity.............................................................................. 10

CHAPTER III GOALS AND OBJECTIVES ................................................................... 12

3.1. Goal.............................................................................................................................. 12

3.2. Objectives.................................................................................................................... 12

CHAPTER IV STUDY SITE AND METHODS............................................................... 13

4.1. Study site ..................................................................................................................... 13

4.1.1. Geographic location .................................................................................................. 13

4.1.2. Topographic .............................................................................................................. 14

4.1.3. Climate ...................................................................................................................... 14

4.1.4. Hydrology .................................................................................................................. 15

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4.1.5. Population and ethnic ............................................................................................... 16

4.1.6. Forest resources ........................................................................................................ 16

4.2. Methods....................................................................................................................... 17

4.2.1. Sampling design ........................................................................................................ 17

4.2.2. Data collection .......................................................................................................... 18

4.2.3. Data analysis............................................................................................................. 18

CHAPTER V RESULTS AND DISCUSSION.................................................................. 21

5. Results ............................................................................................................................ 21

5.1. Descriptive statistics.................................................................................................... 21

5.2. Forest structure ........................................................................................................... 22

5.3. Tree species diversity .................................................................................................. 29

6. Discussion ....................................................................................................................... 32

CHAPTER VI CONCLUSIONS, LIMITATIONS AND RECOMMENDATIONS ....... 34

REFERENCES .................................................................................................................. 36

APENDIX........................................................................................................................... 41

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LIST OF TABLES

Table 4.1. Forest structure investigation ............................................................................... 18

Table 5.1. Descriptive statistics of 9 plots ............................................................................ 21

Table 5.2. Important Value Index of tree species in 9 plots................................................... 22

Table 5.3. Status of tree species in the 9 plots according to diameter (cm)............................ 26

Table 5.4. The number of tree species and families for tropical moist evergreen broadleaf

forests in 9 plots................................................................................................................... 30

Table 5.5. Diversity indices for tropical moist evergreen broadleaf forests in 9 plots............ 30

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LIST OF FIGURES

Figure 4.1. The map of study site in Tam Duong District, Lai Chau Province....................... 13

Figure 5.2. Diameter distribution of tropical moist evergreen broadleaf forests in 9 plots..... 27

Figure 5.3. Diameter distribution of Schima crenata............................................................. 28

Figure 5.4. Diameter distribution of Litsea glusinosa............................................................ 28

Table 5.4. The number of tree species and families for tropical moist evergreen broadleaf

forests in 9 plots................................................................................................................... 30

Table 5.5. Diversity indices for tropical moist evergreen broadleaf forests in 9 plots............ 30

Figure 5.5. Diversity indices in 9 plots................................................................................. 31