干旱区生态环境知识资源中心(Arid): Long-term nitrogen isotope dynamics in Encelia farinosa reflect plant demographics and climate

Arid

DOI	10.1111/nph.17668
	Long-term nitrogen isotope dynamics in Encelia farinosa reflect plant demographics and climate
	Driscoll, Avery W.; Kannenberg, Steven A.; Ehleringer, James R.
通讯作者	Driscoll, AW (corresponding author), Univ Utah, Sch Biol Sci, 257 S 1400 E, Salt Lake City, UT 84112 USA.
来源期刊	NEW PHYTOLOGIST
ISSN	0028-646X
EISSN	1469-8137
出版年	2021
英文摘要	While plant delta N-15 values have been applied to understand nitrogen (N) dynamics, uncertainties regarding intraspecific and temporal variability currently limit their application. We used a 28 yr record of delta N-15 values from two Mojave Desert populations of Encelia farinosa to clarify sources of population-level variability. We leveraged > 3500 foliar delta N-15 observations collected alongside structural, physiological, and climatic data to identify plant and environmental contributors to delta N-15 values. Additional sampling of soils, roots, stems, and leaves enabled assessment of the distribution of soil N content and delta N-15, intra-plant fractionations, and relationships between soil and plant delta N-15 values. We observed extensive within-population variability in foliar delta N-15 values and found plant age and foliar %N to be the strongest predictors of individual delta N-15 values. There were consistent differences between root, stem, and leaf delta N-15 values (spanning c. 3 parts per thousand), but plant and bulk soil delta N-15 values were unrelated. Plant-level variables played a strong role in influencing foliar delta N-15 values, and interannual relationships between climate and delta N-15 values were counter to previously recognized spatial patterns. This long-term record provides insights regarding the interpretation of delta N-15 values that were not available from previous large-scale syntheses, broadly enabling more effective application of foliar delta N-15 values.
英文关键词	age climate desert shrub Encelia farinosa intra-plant fractionation Mojave Desert nitrogen concentration nitrogen isotope ratio
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000687697300001
WOS关键词	N-15 NATURAL-ABUNDANCE ; MOJAVE DESERT ; MYCORRHIZAL FUNGI ; FOLIAR DELTA-N-15 ; GLOBAL PATTERNS ; SOIL NUTRIENTS ; ELEVATED CO2 ; WATER ; LEAF ; CARBON
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/2XILL650/364245
作者单位	[Driscoll, Avery W.; Kannenberg, Steven A.; Ehleringer, James R.] Univ Utah, Sch Biol Sci, 257 S 1400 E, Salt Lake City, UT 84112 USA
推荐引用方式 GB/T 7714	Driscoll, Avery W.,Kannenberg, Steven A.,Ehleringer, James R.. Long-term nitrogen isotope dynamics in Encelia farinosa reflect plant demographics and climate[J],2021.
APA	Driscoll, Avery W.,Kannenberg, Steven A.,&Ehleringer, James R..(2021).Long-term nitrogen isotope dynamics in Encelia farinosa reflect plant demographics and climate.NEW PHYTOLOGIST.
MLA	Driscoll, Avery W.,et al."Long-term nitrogen isotope dynamics in Encelia farinosa reflect plant demographics and climate".NEW PHYTOLOGIST (2021).