Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests
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ORIGINAL PAPER
Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests Tran Van Do1,2 • Mamoru Yamamoto1 • Osamu Kozan3 • Vo Dai Hai4 • Phung Dinh Trung2 • Nguyen Toan Thang2 • Lai Thanh Hai2 • Vu Thanh Nam5 • Trieu Thai Hung2 • Hoang Van Thang4 • Tran Duc Manh2 • Cao Chi Khiem2 • Vu Tien Lam2 • Nguyen Quang Hung2 • Tran Hoang Quy2 • Pham Quang Tuyen2 • Trinh Ngoc Bon2 • Nguyen Thi Thu Phuong2 • Ninh Viet Khuong2 • Nguyen Van Tuan2 • Dang Thi Hai Ha2 • Tran Hai Long2 • Dang Van Thuyet2 • Dang Thinh Trieu2 • Nguyen Van Thinh2 • Tran Anh Hai2 • Duong Quang Trung2 • Nguyen Van Bich2 • Dinh Hai Dang2 • Pham Tien Dung2 • Nguyen Huy Hoang2 • Le Thi Hanh2 • Phan Minh Quang2 • Nguyen Thi Thuy Huong2 • Hoang Thanh Son2 Nguyen Thanh Son2 • Nguyen Thi Van Anh2 • Nguyen Thi Hoai Anh2 • Pham Dinh Sam2 • Hoang Thi Nhung2 • Hoang Van Thanh2 • Nguyen Huu Thinh2 • Tran Hong Van2 • Ho Trung Luong2 • Bui Kieu Hung2
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Received: 10 January 2018 / Accepted: 13 May 2018 The Author(s) 2019
Abstract Biotic and abiotic factors control aboveground biomass (AGB) and the structure of forest ecosystems. This study analyses the variation of AGB and stand structure of evergreen broadleaved forests among six ecoregions of Vietnam. A data set of 173 1-ha plots from 52 locations in undisturbed old-growth forests was developed. The results indicate that basal area and AGB are closely correlated Project funding: This word is funded by Vietnam Ministry of Science and Technology under Grant number ÐTÐL.XH.10/15, Vietnam National Foundation for Science & Technology Development (106NN.06-2016.10), and International Foundation for Science (J-1-D4602-3).
with annual precipitation, but not with annual temperature, evaporation or hours of sunshine. Basal area and AGB are positively correlated with trees [ 30 cm DBH. Most areas surveyed (52.6%) in these old-growth forests had AGB of 100–200 Mg ha-1; 5.2% had AGB of 400–500 Mg ha-1, and 0.6% had AGB of [ 800 Mg ha-1. Seventy percent of the areas surveyed had stand densities of 300–600 ind. ha-1, and 64% had basal areas of 20–40 m2 ha-1. Precipitation is an important factor influencing the AGB of old-growth, evergreen broadleaved forests in Vietnam. Disturbances causing the loss of large-diameter trees (e.g., [ 100 cm DBH) affects AGB but may not seriously affect stand density.
The online version is available at http://www.springerlink.com Corresponding editor: Yu Lei. & Tran Van Do [email protected]
Keywords Aboveground biomass Carbon storage Climatic variables Ecoregion Edaphic variables Oldgrowth forest
1
Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, Japan
Introduction
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Silviculture Research Institute, Vietnamese Academy of Forest Sciences, North Tu Liem, Hanoi, Vietnam
3
Center for Southeast Asian Studies, Kyoto University, Kyoto, Japan
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Vietnamese Academy of Forest Sciences, North Tu Liem, Hanoi, Vietnam
5
Vietnam Administration of Forestry, No. 2 Ngoc Ha, Ba Dinh, Hanoi, Vietnam
The importance o
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