气候变化领域集成服务门户(CCPortal): Strong influences of stand age and topography on post-fire understory recovery in a Chinese boreal forest

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DOI	10.1016/j.foreco.2020.118307
	Strong influences of stand age and topography on post-fire understory recovery in a Chinese boreal forest
	Liu B.; Biswas S.R.; Yang J.; Liu Z.; He H.S.; Liang Y.; Lau M.K.; Fang Y.; Han S.
发表日期	2020
ISSN	0378-1127
卷号	473
英文摘要	Soil resource quantity and heterogeneity as well as overstory characteristics change along with stand age after fire disturbance, imposing strong influences on post-fire understory recovery. In this study, we aimed to assess how soil resource (nitrogen quantity and heterogeneity), topographic position (aspect), overstory characteristics (basal area), and stand age affected understory characteristics (cover, richness, evenness, and composition) during boreal forest succession after fire disturbance. We collected plant community and environmental data from 76 stands aged at 4 to 203 years post-fire in the boreal forest of Northeast China. We separately tested the effects of the considered factors on the characteristics of total understory, shrubs, and herbs. Total understory cover was higher at the south-facing slopes and flat locations than at north-facing slopes. Species richness of total understory, shrubs, and herbs was higher at the flat locations and south-facing slopes than at the north-facing slopes. The cover of total understory and shrubs showed increasing trends along with stand age, soil nitrogen quantity, and overstory basal area as well as decreasing trends along with soil nitrogen heterogeneity, while the cover of herbs showed reversed trends across all the three topographic positions. Understory richness showed decreasing trends along with soil nitrogen quantity as well as increasing trends along with soil nitrogen heterogeneity and overstory basal area. Total understory evenness showed flat trends along with soil nitrogen quantity, heterogeneity, and stand age as well as decreasing trends along with overstory basal area. Understory community composition was mainly affected by topographic position, stand age, and overstory basal area. During understory recovery, community composition shifted from shade-intolerant species to shade-tolerant species. Our results highlight the importance of topography and stand age in post-fire understory recovery in boreal forests of China, mediated through availability of light and soil nutrients. © 2020 Elsevier B.V.
关键词	Fires Nitrogen Recovery Soils Topography Community composition Environmental data Plant communities Shade intolerant Species richness Topographic positions Understory communities Understory cover Forestry age determination basal area boreal forest community composition disturbance herb heterogeneity plant community recovery shade tolerance shrub stand structure succession topography understory Age Fires Forestry Nitrogen Recovery Soil Topography Trends China
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132688
推荐引用方式 GB/T 7714	Liu B.,Biswas S.R.,Yang J.,et al. Strong influences of stand age and topography on post-fire understory recovery in a Chinese boreal forest[J]. Forest Ecology and Management,2020,473.
APA	Liu B..,Biswas S.R..,Yang J..,Liu Z..,He H.S..,...&Han S..(2020).Strong influences of stand age and topography on post-fire understory recovery in a Chinese boreal forest.,473.
MLA	Liu B.,et al."Strong influences of stand age and topography on post-fire understory recovery in a Chinese boreal forest".473(2020).