Assessment Of The Plant Diversity Changes In Ba Vi National Park In Recent 10 Years

ACKNOWLEDGEMENTS

Being consented of the Department of Forest Resources and Environmental

Management (FREM), I have carried out a research: “Assessment of the plant diversity

changes in Ba Vi National Park in recent 10 years"

In the implementing research process, I have received the help of Management Board,

Forest Rangers of Ba Vi National Park, local people, and especially the enthusiastic guidance

of Assoc. Prof. Dr. Bui The Doi – Vietnam Forestry University.

So I would like to express deep gratitude to Assoc.Prof.Dr. Bui The Doi, and also

thank to the Board of Director of Ba Vi National Park, forest rangers who have created

favorable conditions for me to complete the study. Especially forest rangers have instructed

me enthusiastically throughout the research. I also appreciate the local people, my family and

classmates who help me complete this study.

Due to time constraints, knowledge, and capacity are limit, so this study will not avoid

flaws. I look forward to the contributions from teachers to more complete the study.

Sincerely!

Hanoi, October, 2015

Tran Phung Ngoc Anh

ABSTRACT

The research presents the changes of plant diversity in Ba Vi National Park in recent

10 years. Base on old data and survey results collected on 10 sample plots in 2015, the study

clearly described the status of forest changes over the years and determine the cause of

decline of plant resources, propose measures to conserve plant diversity. Using methods of

investigation for fluctuations in forest state, methodology of fluctuations of forest plants to

investigate the biodiversity indicators. The results of study showed that total forest area,

natural forests and plantation forests area have changed after 10 years: fluctuation in density

of high tree layer, fluctuation in diameter at breast height of high tree layer, and fluctuation in

the tree high of high tree layer. In addition, important value index and diversity indices of tree

species are also necessary indicators to assess status of forest. Data collected in 2015 include

61 species and 701 trees species. Generally, plant resources in Ba Vi National Park in 10

years don’t have much fluctuation, and the index has not changed much proved that the

quality of forests in the study area are quite good.

TABLE OF CONTENTS

ACKNOWLEDGEMENTS

ABSTRACT

TABLE OF CONTENTS

LIST OF FIGURES

LIST OF TABLES

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

II. AN OVERVIEW OF THE RESEARCH...............................................................................8

2.1. In the world..........................................................................................................................8

2.2. In Vietnam...........................................................................................................................9

III. RESEARCH OBJECTIVES AND METHOD...................................................................11

3.1. Goals and objectives:.........................................................................................................11

3.2. Study site and scope ..........................................................................................................11

3.3. Methodologies...................................................................................................................13

3.3.1. Data inherited method ...................................................................................................13

3.3.2. Field survey methods......................................................................................................13

IV. RESEARCH RESULTS AND DISCUSSIONS ................................................................18

4.1. Fluctuations in forest state and in forest area ....................................................................18

4.2. Fluctuations of forest plants in Ba Vi National Park.........................................................20

4.2.1. Fluctuations in density of high tree layer .......................................................................20

4.2.2. Fluctuations diameter at breast height (DBH) of high tree layer. ..................................21

4.2.3. The fluctuation the trees high (H) of high tree layer. .....................................................23

4.3. Investigative biodiversity indicators..................................................................................24

4.3.1. Important value index.....................................................................................................24

4.3.2. Diversity indices of tree species. ....................................................................................26