We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
长白山国家级自然保护区落叶松毛虫致 灾状况调查与致灾因子分析.
- Authors
于德江; 郑依国; 孙晨辉; 赵 琛; 靳英华; 张立军; 李金功; 刘丽杰
- Abstract
[Objective] To analyze the disaster situation and factors inducing Dendrolimus superans outbreaks in Changbai Mountain Nature Reserve (CMNR). [Method] Sample plots in the northern slope of CMNR were investigated in 2019 and 2020, including meteorological conditions, stand structures, severity of disturbance, and forest restoration. [Result] The results showed that: (1) The Dendrolimus superans disturbance area was small, which occupied 12.5% of the total area of the northern slope of CMNR and of which 21.8% was mild disturbance and 79.2% was severe disturbance. The main tree species affected were Picea jezoensis, Abies nephrolepis, Pinus koraiensis, and Larix olgensis. (2) Within the disturbance area, the recovery degree of forests varied significantly among different forest types. All the disturbed Larix olgensis forests recovered, and poor recovery occurred in pure Pinus koraiensis forests and severe disturbance forests in spruce fir forests in altitude of 1 100 m to 1 300 m. (3) There were significant differences in the density of insect populations in the three types of forests because of different stand structures. Despite the high diversity and mingling degree, spruce fir forests dominated by coniferous species (pure forest) with low competition index, neighborhood comparison index, and strong tree vigor, were prone to pests disaster. The competition index and neighborhood comparison index in coniferous-broad leaved Korean pine mixed forest were high and tree vigor was weak. but the forests were dominated by broadleaved tree species with high diversity and mingling degree, and the damage degree was lower than spruce fir forests. The competition index, mingling degree index, neighborhood comparison index, and the diversity index of Larix olgensis forests were the lowest among all three forest types. Larix olgensis was a pioneer species with small tree ages and few leaves. Although it was susceptible to insect damage, the damage degree was low due to less population densities. And leaf growth of the damaged Larix olgensis forests restored in the next year. (4) High temperature, drought, and more sunshine hours happened in 2018 and 2019. The extremely high temperature in autumn and winter of 2018 and the low precipitation in spring of 2019 were the main climatic factors for the outbreak of Dendrolimus superans. [Conclusion] At present, the stand structure, climatic conditions in CMNR are favorable for the outbreak of Dendrolimus superans, which indicates that Dendrolimus superans disasters will occur periodically.
- Subjects
INSECT population density; PINUS koraiensis; FOREST restoration; TREE age; LEAF growth; RAIN forests; SPRUCE; PINACEAE
- Publication
Forest Research, 2022, Vol 35, Issue 3, p103
- ISSN
1001-1498
- Publication type
Article
- DOI
10.13275/j.cnki.lykxyj.2022.03.012