气候变化领域集成服务门户(CCPortal): Effects of warming on root diameter, distribution, and longevity in an alpine meadow

CCPortal

DOI	10.1007/s11258-014-0364-5
	Effects of warming on root diameter, distribution, and longevity in an alpine meadow
	Wu, Yibo; Zhang, Jing; Deng, Yongcui; Wu, Jing; Wang, Shiping; Tang, Yanhong; Cui, Xiaoyong
通讯作者	Cui, XY (通讯作者)
发表日期	2014
ISSN	1385-0237
EISSN	1573-5052
起始页码	1057
结束页码	1066
卷号	215 期号:9
英文摘要	Roots form one of the most important carbon (C) pools in alpine ecosystems. Uncertainty about the effects of warming on root dynamics limits our ability to predict how C will transfer between biological and atmospheric pools in alpine regions under global warming. We used a minirhizotron technique to gain a better understanding of the response of alpine plant roots to warming. We looked for effects on root diameter, root depth in the soil, and root lifespan under a controlled asymmetrical warming (1.2/1.7 A degrees C during daytime/nighttime) experiment during the growing season of 2009 in an alpine meadow on the northern Tibetan plateau. Roots became smaller in diameter, moved toward the upper soil layers, and showed significantly shorter lifespans in heated (H) than in unheated (UH) plots. Furthermore, in H treatment plots root lifespan was more strongly influenced by the time of root emergence rather than by root diameter. These results provide evidence that alpine plants may respond to climate change by altering their roots so that they are thinner, distributed shallower and turning over faster, suggesting that soil C flow and nutrient cycling would be accelerated resulting from the fast turnover of fine roots under elevated temperatures.
关键词	ELEVATED ATMOSPHERIC CO2 SOIL RESPIRATION ORGANIC NITROGEN CARBON-CYCLE FINE ROOTS RESPONSES TEMPERATURE TUNDRA ECOSYSTEM GROWTH
英文关键词	Alpine meadow; Global warming; Minirhizotron; Root diameter; Root lifespan
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS记录号	WOS:000342073000011
来源期刊	PLANT ECOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258374
推荐引用方式 GB/T 7714	Wu, Yibo,Zhang, Jing,Deng, Yongcui,et al. Effects of warming on root diameter, distribution, and longevity in an alpine meadow[J]. 中国科学院青藏高原研究所,2014,215(9).
APA	Wu, Yibo.,Zhang, Jing.,Deng, Yongcui.,Wu, Jing.,Wang, Shiping.,...&Cui, Xiaoyong.(2014).Effects of warming on root diameter, distribution, and longevity in an alpine meadow.PLANT ECOLOGY,215(9).
MLA	Wu, Yibo,et al."Effects of warming on root diameter, distribution, and longevity in an alpine meadow".PLANT ECOLOGY 215.9(2014).