The effect of low-temperature event on the survival and growth of Juglans mandshurica seedlings within forest gaps

IMR OpenIR

	The effect of low-temperature event on the survival and growth of Juglans mandshurica seedlings within forest gaps
其他题名	The effect of low-temperature event on the survival and growth of Juglans mandshurica seedlings within forest gaps
	Li Xiufen 1; Wen Yongjing 1; Zhang Jinxin 1; Liu Limin 1; Jin Lei 1; Yan Tao 1; Wang Yi 1
	2018
发表期刊	JOURNAL OF FORESTRY RESEARCH
ISSN	1007-662X
卷号	29 期号:4 页码:943-951
摘要	In forest ecosystems, gap formation changes the allocation of abiotic resources and thus affects the survival and growth of understory plants. However, how tree seedling survival and growth respond to low-temperature events and the influencing mechanisms remain unclear. To clarify how low-temperature event limits the survival and growth of tree seedlings in the montane regions of eastern Liaoning Province, northeast China, we investigated temperature and light intensity within secondary forest gaps, and the survival and growth of Juglans mandshurica seedlings after a low-temperature event in the spring of 2014. Damage to seedlings due to low temperature significantly varied in different aspects. Seedlings in gaps on southeast-facing slopes were the most seriously damaged, followed by those in gaps on northeast-facing slopes. In contrast, seedlings in west-facing gaps and in control plots without slope aspect were not damaged. The freezing injury index for seedlings was negatively correlated with minimum temperature (r = - 0.608, P < 0.01), but it was positively correlated with light intensity (r = 0.818, P < 0.01). In addition, height and root collar diameter of damaged seedlings were significantly lower than those of the undamaged seedlings (P < 0.01) during the early growing season (April-July), but no significant difference were observed during the late growing season (July-October) (P > 0.05). The extent of seedling damage was directly related to slope aspect. Low temperature and high light intensity were found to be the dominant factors affecting extent of damage to seedlings on southeast- and northeast-facing slopes.
其他摘要	In forest ecosystems, gap formation changes the allocation of abiotic resources and thus affects the survival and growth of understory plants. However, how tree seedling survival and growth respond to low-temperature events and the influencing mechanisms remain unclear. To clarify how low-temperature event limits the survival and growth of tree seedlings in the montane regions of eastern Liaoning Province, northeast China, we investigated temperature and light intensity within secondary forest gaps, and the survival and growth of Juglans mandshurica seedlings after a low-temperature event in the spring of 2014. Damage to seedlings due to low temperature significantly varied in different aspects. Seedlings in gaps on southeast-facing slopes were the most seriously damaged, followed by those in gaps on northeast-facing slopes. In contrast, seedlings in west-facing gaps and in control plots without slope aspect were not damaged. The freezing injury index for seedlings was negatively correlated with minimum temperature (r = - 0.608, P 0.05). The extent of seedling damage was directly related to slope aspect. Low temperature and high light intensity were found to be the dominant factors affecting extent of damage to seedlings on southeast- and northeast-facing slopes.
关键词	EASTERN LIAONING PROVINCE FROST DAMAGE EUCALYPTUS-PAUCIFLORA SECONDARY FORESTS AIR-TEMPERATURE CANOPY GAPS ESTABLISHMENT MORTALITY DENSITY LIGHT Secondary forest gap Freezing injury index Minimum temperature Light intensity Slope aspect
收录类别	CSCD
语种	英语
资助项目	[National Key Research and Development Program of China] ; [National Nature Scientific Foundation Project of China]
CSCD记录号	CSCD:6253685
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/144319
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.中国科学院
推荐引用方式 GB/T 7714	Li Xiufen,Wen Yongjing,Zhang Jinxin,et al. The effect of low-temperature event on the survival and growth of Juglans mandshurica seedlings within forest gaps[J]. JOURNAL OF FORESTRY RESEARCH,2018,29(4):943-951.
APA	Li Xiufen.,Wen Yongjing.,Zhang Jinxin.,Liu Limin.,Jin Lei.,...&Wang Yi.(2018).The effect of low-temperature event on the survival and growth of Juglans mandshurica seedlings within forest gaps.JOURNAL OF FORESTRY RESEARCH,29(4),943-951.
MLA	Li Xiufen,et al."The effect of low-temperature event on the survival and growth of Juglans mandshurica seedlings within forest gaps".JOURNAL OF FORESTRY RESEARCH 29.4(2018):943-951.