害虫对森林碳汇的影响及其机理

编号 lyqk005333

中文标题 害虫对森林碳汇的影响及其机理

作者 景天忠  豆晓洁 

作者单位 东北林业大学林学院,哈尔滨 150040;东北林业大学林学院,哈尔滨 150040

期刊名称 世界林业研究 

年份 2016 

卷号 29

期号 1

栏目编号 1

栏目名称 专题论述 

中文摘要 森林是陆地生态系统中最主要的固碳者。但森林常受到各种干扰,使其固碳能力下降,甚至变成碳源。文中主要介绍了叶部害虫、干部害虫和根部害虫干扰对森林碳汇的影响及其机理方面的研究进展。森林昆虫种类繁多,危害方式及机理也各不相同。叶部害虫通过食叶或吸取汁液破坏叶绿素直接影响光合作用。研究表明,与光合作用相关基因的表达下调或上调,光合作用减弱或增强,目前尚无一致的结论。在林分水平上,失叶通常导致碳贮量下降。小蠹虫等蛀干害虫危害致树木死亡,将森林由碳库变成碳源。根部害虫不但使根生物量下降,还会影响植物光合作用,但机理尚不清楚。害虫暴发后改变了土壤理化性质,但在一定时间范围内对土壤呼吸并无显著影响,其机理尚待揭示。

关键词 叶部害虫  干部害虫  根部害虫  森林碳汇  光合作用 

基金项目 国家科技计划东北森林碳增汇效应调控技术研究(2011BAD37B01)。

英文标题 Impact and Mechanism of Insect Pests on Forest Carbon Sequestration

作者英文名 Jing Tianzhong and Dou Xiaojie

单位英文名 School of Forestry,Northeast Forestry University,Harbin 150040,China;School of Forestry,Northeast Forestry University,Harbin 150040,China

英文摘要 Forest is the largest carbon sink in terrestrial ecosystems. However, forests are often interfered by different factors, which lead to the reduced capacity of forests to sequestrate carbon and turn forest into a carbon source. This paper reviewed the research advances on the impact of forest insect pests living on leaves, stems and roots on carbon sequestration as well as the impact mechanism. Various forest insects have various feeding manners and resulting various impacts with various mechanisms. Leaf insects affect photosynthesis via defoliation or sucking sap. The research indicated that there is no agreed conclusion on if the photosynthesis increases or decreases as the result of the up-regulation or down-regulation of the expression of genes related to photosynthesis. On stand level, defoliation by insects usually results in a decrease of carbon stock. Stem borers, such as bark beetles, often kill trees and turn a forest from a carbon sink to a carbon source. Root insects not only decrease the biomass of root, but also affect the photosynthesis with unveiled mechanism. The outbreaks of insects change both the physiological and the chemical properties of forest soil. However, it does not affect the respiration of forest soil significantly in a certain time period, and the reason needs to be studied in future.

英文关键词 defoliator;stem borer;root insect;forest sink;photosynthesis

起始页码 29

截止页码 35

投稿时间 2015/3/26

分类号 S718.55;S763.3

DOI 10.13348/j.cnki.sjlyyj.2016.0002.y

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