Aboveground biomass increment and stand dynamics in tropical evergreen broadleaved forest
Aboveground biomass increment and stand dynamics in tropical evergreen broadleaved forest
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热带常绿阔叶林地上生物量增量及林分动态
DOI：
10.1080/10549811.2017.1375959
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发表时间：
2017
影响因子：
1.6
通讯作者：
Cam Ngo Van
中科院分区：
文献类型：
--
作者：
Do Tran Van;Trung Phung Dinh;Yamamoto Mamoru;Kozan Osamu;Thang Nguyen Toan;Thuyet Dang Van;Thang Hoang Van;Phuong Nguyen Thi Thu;Khuong Ninh Viet;Cam Ngo Van
森林生态系统可以通过生物量的积累来调节大气CO2，生物量主要集中在胸径≥ 10 cm的树干上。根据越南中部高原热带万年青阔叶林树干的死亡率、补充量和生长量数据，计算了林分地上生物量增量（ΔAGB），以及林分AGB、树干数和断面积（BA）的变化。数据来源于2004年建立的10个1公顷永久性地块，其中所有胸径≥ 10 cm的树干都被标记，确定为物种，并在2004年和2012年测量胸径。8年的生长量为53 ± 10株ha-1，BA为7.8 ± 0.3 m2 ha-1，AGB为86.0 ± 4.6 Mg ha-1。1年股骨柄死亡率为0.9%，1年股骨柄募集率为2.2%。年ΔAGB为10.8 Mg ha-1 year-1，相当于5.4 Mg C ha-1 year-1。其中35-80 cm径级的树干占65%。结果表明，该森林处于固碳阶段。任何干扰都会导致35-80 cm胸径树干的死亡，这将大大降低AGB的固碳能力，AGB将需要很长时间才能恢复到干扰前的水平。
Forest ecosystems can modify the atmospheric CO2through biomass accumulation mostly in tree stems with diameter at breast height (DBH) ≥ 10 cm. Aboveground biomass increment (ΔAGB), and changes in stand AGB, no. stems and basal area (BA) were calculated from mortality, recruitment, and growth data of tree stems in tropical evergreen broadleaved forest, Central Highland Vietnam. Data were derived from ten 1-ha permanent plots established in 2004, where all stems with DBH ≥ 10 cm were tagged, identified to species, and measured for DBH in 2004 and 2012. In an 8-year duration, the increment was 53 ± 10 stems ha–1, 7.8 ± 0.3 m2ha–1for BA and 86.0 ± 4.6 Mg ha–1for AGB. The stem mortality rate was 0.9% year–1and the stem recruitment rate was 2.2% year–1. Annual ΔAGB was 10.8 Mg ha–1year–1, equaling to 5.4 Mg C ha–1year–1. Of which, tree stems of 35–80 cm DBH classes accounted for 65%. The results indicated that the forest is in stage of carbon sequestration. Any disturbances causing death of 35–80 cm DBH tree stems will much reduce carbon sequestration capacity and it will take a long time for AGB to return to pre-disturbance stage.