Long-term forest landscape responses to fire exclusion in the Great Xing'an Mountains, China
Long-term forest landscape responses to fire exclusion in the Great Xing'an Mountains, China
复制标题
中国大兴安岭森林景观对防火的长期响应
DOI：
10.1071/wf05093
复制
发表时间：
2007-01-01
影响因子：
3.1
通讯作者：
Li, Xiuzhen
中科院分区：
文献类型：
--
作者：
Chang, Yu;He, Hong S.;Li, Xiuzhen
中国东北地区尚未对森林景观的长期动态进行研究，这对制定合理的森林管理和保护计划越来越有必要。在本研究中，我们研究了长期禁火是否会导致灾难性火灾，以及禁火所改变的火灾状态是否改变了优势树种的自然演替过程。设计了禁火和不禁火两种模拟情景，利用LANDIS软件从物种丰度、年龄结构和空间格局等方面研究了300年的长期（300 a）火灾动态和优势树种演替。模拟结果表明，禁火可导致灾变火灾的发生，其复发间隔为50 ~ 120年，针叶林比例增加，落叶林比例减少，树种组成简化，林龄结构和景观格局发生改变。基于这些模拟结果，我们建议在该地区的森林经营规划中应纳入规定焚烧或减少粗木屑、不均匀年龄管理和综合野生动物栖息地适宜性分析。
Understanding of long-term forest landscape dynamics under fire exclusion, which have not been studied in north-eastern China, is increasingly needed for designing sound forest management and protection plans. In the present study, we examine whether long-term fire exclusion leads to catastrophic fires and whether the fire regimes altered by fire exclusion have changed the course of natural succession of dominant tree species. We designed two simulation scenarios - fire exclusion and no fire exclusion - and used LANDIS to study the long-term (300 years) fire regime dynamic and the succession of dominant tree species in terms of species abundance, age structure and spatial pattern. Our simulated results show that fire exclusion can lead to catastrophic fires with return intervals ranging from 50 to 120 years, increase the proportion of coniferous forests and decrease the proportion of deciduous forests, simplify tree species composition, and alter forest age structures and landscape patterns. Based on these simulated results, we suggest that prescribed burning or coarse woody debris reduction, uneven age management, and a comprehensive wildlife habitat suitability analysis should be incorporated in forest management plans in this region.