Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests

Autor: Nguyen Huu Thinh, Pham Dinh Sam, Ho Trung Luong, Trieu Thai Hung, Vu Thanh Nam, Vo Dai Hai, Nguyen Quang Hung, Tran Hoang Quy, Phan Minh Quang, Nguyen Van Bich, Nguyen Thi Van Anh, Tran Duc Manh, Lai Thanh Hai, Osamu Kozan, Hoang Thi Nhung, Le Thi Hanh, Dang Van Thuyet, Cao Chi Khiem, Dang Thi Hai Ha, Duong Quang Trung, Nguyen Thi Hoai Anh, Tran Van Do, Phung Dinh Trung, Hoang Thanh Son, Hoang Van Thanh, Nguyen Van Thinh, Bui Kieu Hung, Hoang Van Thang, Trinh Ngoc Bon, Dang Thinh Trieu, Nguyen Thu Phuong, Vu Tien Lam, Dinh Hai Dang, Nguyen Thanh Son, Nguyen Thuy Huong, Nguyen Van Tuan, Nguyen Huy Hoang, Tran Anh Hai, Tran Hai Long, Nguyen Toan Thang, Tran Hong Van, Pham Tien Dung, Ninh Viet Khuong, Pham Quang Tuyen, Mamoru Yamamoto
Rok vydání: 2019
Předmět:
Zdroj: Journal of Forestry Research. 31:1713-1722
ISSN: 1993-0607
1007-662X
Popis: 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 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.
Databáze: OpenAIRE
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