干旱区生态环境知识资源中心(Arid): Soil Moisture and Soluble Salt Content Dominate Changes in Foliar delta C-13 and delta N-15 of Desert Communities in the Qaidam Basin, Qinghai-Tibetan Plateau

Arid

DOI	10.3389/fpls.2021.675817
	Soil Moisture and Soluble Salt Content Dominate Changes in Foliar delta C-13 and delta N-15 of Desert Communities in the Qaidam Basin, Qinghai-Tibetan Plateau
	Niu, Weiling; Chen, Hui; Wu, Jianshuang
通讯作者	Chen, H (corresponding author), Hebei Normal Univ, Hebei Key Lab Environm Change & Ecol Construct, Coll Resources & Environm Sci, Shijiazhuang, Hebei, Peoples R China. ; Chen, H (corresponding author), Hebei Normal Univ, Hebei Technol Innovat Ctr Remote Sensing Identifi, Coll Resources & Environm Sci, Shijiazhuang, Hebei, Peoples R China. ; Wu, JS (corresponding author), Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing, Peoples R China. ; Wu, JS (corresponding author), Free Univ Berlin, Theoret Ecol, Inst Biol, Berlin, Germany.
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2021
卷号	12
英文摘要	Changing precipitation and temperature are principal drivers for nutrient cycling dynamics in drylands. Foliar isotopic carbon (C) and nitrogen (N) composition (delta C-13 and delta N-15) are often used to describe the plant's water use efficiency and nitrogen use strategy in plant ecology research. However, the drivers and mechanisms under differential foliar delta C-13 and delta N-15 among plant species and communities are largely unknown for arid high-elevation regions. This study collected 462 leaf samples of ten top-dominant plant species (two or three replicates per species) across 16 sites in 2005 and 2010 to measure the community-weighted means (CWMs) of foliar delta C-13 and delta N-15, northeastern Qaidam Basin, Qinghai-Tibetan Plateau. Our results showed that the CWM of foliar delta N-15 was higher in 2005 than in 2010 and was lower in the warm-dry season (July and August) than the cool-wet one (June and September) in 2010. Similarly, the CWM of foliar delta C-13 was higher in 2005 than in 2010, but no difference between warm-dry and cool-wet seasons in 2010. C-4 plants have higher delta C-13 and generally grow faster than C-3 species under warm-wet weathers. This might be why the CWM of foliar delta C-13 was high, while the CWM of foliar delta N-15 was low in the wet sampling year (2010). The general linear mixed models revealed that soil moisture was the most critical driver for the CWM of foliar delta N-15, which explained 42.1% of the variance alone. However, the total soluble salt content was the crucial factor for the CWM of foliar delta C-13, being responsible for 29.7% of the variance. Growing season temperature (GST) was the second most vital factor and explained 28.0% and 21.9% of the variance in the CWMs of foliar delta N-15 and delta C-13. Meanwhile, remarkable differences in the CWMs of foliar delta N-15 and delta C-13 were also found at the species level. Specifically, Kalidium gracile and Salsola abrotanoides have higher foliar delta N-15, while Ephedra sinica and Tamarix chinensis have lower foliar delta N-15 than other species. The foliar delta C-13 of Calligonum Kozlov and H. ammodendron was the highest among the ten species. Except for the foliar delta C-13 of E. sinica was higher than Ceratoide latens between the two sampling years or between the cool-wet and warm-dry seasons, no significant difference in foliar delta C-13 was found for other species. Overall, the CWMs of foliar delta N-15 and delta C-13 dynamics were affected by soil properties, wet-dry climate change, and species identity in high-elevation deserts on the Qinghai Tibetan Plateau.
英文关键词	carbon isotopic composition environmental gradients nitrogen isotopic composition nitrogen utilization strategy water use efficiency
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000675588800001
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; N-15 NATURAL-ABUNDANCE ; WATER-USE EFFICIENCY ; ALPINE GRASSLANDS ; STABLE-ISOTOPES ; LEAF DELTA-C-13 ; TERRESTRIAL ECOSYSTEMS ; SEASONAL-VARIATION ; RAIN-FOREST ; TREE-RINGS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363346
作者单位	[Niu, Weiling; Chen, Hui] Hebei Normal Univ, Hebei Key Lab Environm Change & Ecol Construct, Coll Resources & Environm Sci, Shijiazhuang, Hebei, Peoples R China; [Chen, Hui] Hebei Normal Univ, Hebei Technol Innovat Ctr Remote Sensing Identifi, Coll Resources & Environm Sci, Shijiazhuang, Hebei, Peoples R China; [Wu, Jianshuang] Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing, Peoples R China; [Wu, Jianshuang] Free Univ Berlin, Theoret Ecol, Inst Biol, Berlin, Germany
推荐引用方式 GB/T 7714	Niu, Weiling,Chen, Hui,Wu, Jianshuang. Soil Moisture and Soluble Salt Content Dominate Changes in Foliar delta C-13 and delta N-15 of Desert Communities in the Qaidam Basin, Qinghai-Tibetan Plateau[J],2021,12.
APA	Niu, Weiling,Chen, Hui,&Wu, Jianshuang.(2021).Soil Moisture and Soluble Salt Content Dominate Changes in Foliar delta C-13 and delta N-15 of Desert Communities in the Qaidam Basin, Qinghai-Tibetan Plateau.FRONTIERS IN PLANT SCIENCE,12.
MLA	Niu, Weiling,et al."Soil Moisture and Soluble Salt Content Dominate Changes in Foliar delta C-13 and delta N-15 of Desert Communities in the Qaidam Basin, Qinghai-Tibetan Plateau".FRONTIERS IN PLANT SCIENCE 12(2021).