Warming induced changes in wood matter accumulation in tracheid walls of spruce

doi:10.1007/s11629-019-5516-6

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2020 > Vol17 No.1

	Warming induced changes in wood matter accumulation in tracheid walls of spruce
	Babushkina, Elena; Zhirnova, Dina; Belokopytova, Liliana; Vaganov, Eugene
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2020
卷号	17 期号:1 页码:16-30
关键词	Climate change Sayano-Shushenskoe Reservoir Elevational gradient Picea obovata Quantitative wood anatomy Climate-growth relationship
ISSN号	1672-6316
DOI	10.1007/s11629-019-5516-6
文献子类	Article
英文摘要	The warming-driven increase of the vegetation season length impacts both net productivity and phenology of plants, changing an annual carbon cycle of terrestrial ecosystems. To evaluate this influence, tree growth along the temperature gradients can be investigated on various organization levels, beginning from detailed climatic records in xylem cells' number and morphometric parameters. In this study, the Borus Ridge of the Western Sayan Mountains (South Siberia) was considered as a forest area under rapid climate change caused by massive Sayano-Shushenskoe reservoir. Several parameters of the xylem anatomical structure in Siberian spruce (Picea obovata Ledeb.) were derived from normalized tracheidograms of cell radial diameter and cell wall thickness and analyzed during 50 years across elevational gradient (at 520, 960, and 1320 m a.s.l.). On the regional scale, the main warming by 0.42 degrees C per decade occurs during cold period (November-March). Construction of the reservoir accelerated local warming substantially since 1980, when abrupt shift of the cold season temperature by 2.6 degrees C occurred. It led to the vegetation season beginning 3-6 days earlier and ending 4-10 day later with more stable summer heat supply. Two spatial patterns were found in climatic response of maximal cell wall thickness: (1) temperature has maximal impact during 21-day period, and its seasonality shifts with elevation in tune with temperature gradient; (2) response to the date of temperature passing +9.5 degrees C threshold is observed at two higher sites. Climate change yielded significantly bigger early wood spruce tracheids at all sites, but its impact on cell wall deposition process had elevational gradient: maximal wall thickness increased by 7.9% at the treeline, by 18.2% mid-range, and decreased by 4.9% at the lower boundary of spruce growth; normalized total cell wall area increased by 6.2%-6.8% at two higher sites but remained stable at the lowest one. We believe that these patterns are caused by two mechanisms of spruce secondary growth cessation: emergency induced by temperature drop versus regular one in warmer conditions. Therefore, autumn lengthening of growth season stimulated wood matter accumulation in tracheid walls mainly in cold environment, increasing role of boreal and mountain forests in carbon cycle.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000512076900002
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46715]
专题	Journal of Mountain Science_Journal of Mountain Science-2020_Vol17 No.1
推荐引用方式 GB/T 7714	Babushkina, Elena,Zhirnova, Dina,Belokopytova, Liliana,et al. Warming induced changes in wood matter accumulation in tracheid walls of spruce[J]. JOURNAL OF MOUNTAIN SCIENCE,2020,17(1):16-30.
APA	Babushkina, Elena,Zhirnova, Dina,Belokopytova, Liliana,&Vaganov, Eugene.(2020).Warming induced changes in wood matter accumulation in tracheid walls of spruce.JOURNAL OF MOUNTAIN SCIENCE,17(1),16-30.
MLA	Babushkina, Elena,et al."Warming induced changes in wood matter accumulation in tracheid walls of spruce".JOURNAL OF MOUNTAIN SCIENCE 17.1(2020):16-30.