气候变化领域集成服务门户(CCPortal): Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet

CCPortal

DOI	10.3390/su15118458
	Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet
	Li, Yueyao; Fu, Fangwei; Li, Jiangrong; Chen, Wensheng; Ding, Huihui; Xiao, Siying
发表日期	2023
EISSN	2071-1050
卷号	15 期号:11
英文摘要	In order to elucidate the adaptation mechanisms of the stoichiometric characteristics of Abies georgei var. smithii in southeastern Tibet to different habitats, the spatial and temporal dynamics of the nutrient contents and stoichiometric ratios among the leaf, branch, stem, and root organs were analyzed on Sejila Mountain in southeastern Tibet at different elevations (3500 m, 3900 m, and 4300 m). The results show that (1) the C and K contents of the fir organs did not change significantly with increasing elevation in the same season, while the N and P contents showed an overall increasing trend with increasing elevation, with the C and N contents being the highest in the leaves. The distribution order was leaves > branches > roots > stem; the P and K content order in each organ was branches > leaves > roots > stem. (2) At the same elevation and in different seasons, the Abies georgei var. smithii organs showed a similar convergence in terms of nutrient storage and utilization strategies, and more nutrients were optimally allocated between the assimilated and stored organs in the alpine habitats, which represents a trade-off strategy. (3) Compared to the findings of the global-scale studies, this study area has low N, P, and K contents, and its growth is limited by both N and P. Due to physiological and nutrient balance constraints, the content of the N-limited elements in the plants is relatively stable, which is in line with the limiting element stability hypothesis. (4) Principal component analysis showed that the influence of environmental factors on the stoichiometric characteristics of the different organs of Abies georgei var. smithii had a spatial scale effect, and that Abies georgei var. smithii demonstrated increased accumulation of N and P contents when subjected to environmental stress, which promoted the domestication and adaptation of the plant, enabling it to show good nutrient accumulation capacity and good adaptation strategies even at high elevation; thus, it has become a pioneer tree species at high elevations. This research work shows that the resilient adaptation of Abies georgei var. smithiir to environmental change has led to differences in the nutrient uptake and use efficiency and the adaptation patterns of the organs at different altitudinal gradients, with each organ adapting to habitat changes by adjusting its nutrient storage strategy between habitats.
关键词	Abies georgei var. smithii organs elevation seasonal variation ecological stoichiometry
英文关键词	SUB-ALPINE; NITROGEN; PHOSPHORUS; LEAVES; CARBON; SOIL; PLANTATIONS; VEGETATION; WORLDWIDE; PATTERNS
WOS研究方向	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS记录号	WOS:001005658500001
来源期刊	SUSTAINABILITY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282591
作者单位	Tibet Agriculture & Animal Husbandry University; Tibet Agriculture & Animal Husbandry University
推荐引用方式 GB/T 7714	Li, Yueyao,Fu, Fangwei,Li, Jiangrong,et al. Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet[J],2023,15(11).
APA	Li, Yueyao,Fu, Fangwei,Li, Jiangrong,Chen, Wensheng,Ding, Huihui,&Xiao, Siying.(2023).Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet.SUSTAINABILITY,15(11).
MLA	Li, Yueyao,et al."Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet".SUSTAINABILITY 15.11(2023).