干旱区生态环境知识资源中心(Arid): Seasonal and individual event-responsiveness are key determinants of carbon exchange across plant functional types

Arid

DOI	10.1007/s00442-020-04718-5
	Seasonal and individual event-responsiveness are key determinants of carbon exchange across plant functional types
	Winkler, Daniel E.; Belnap, Jayne; Duniway, Michael C.; Hoover, David; Reed, Sasha C.; Yokum, Hannah; Gill, Richard
通讯作者	Winkler, DE
来源期刊	OECOLOGIA
ISSN	0029-8549
EISSN	1432-1939
出版年	2020
卷号	193 期号:4 页码:811-825
英文摘要	Differentiation in physiological activity is a critical component of resource partitioning in resource-limited environments. For example, it is crucial to understand how plant physiological performance varies through time for different functional groups to forecast how terrestrial ecosystems will respond to change. Here, we tracked the seasonal progress of 13 plant species representing C(3)shrub, perennial C(3)and C(4)grass, and annual forb functional groups of the Colorado Plateau, USA. We tested for differences in carbon assimilation strategies and how photosynthetic rates related to recent, seasonal, and annual precipitation and temperature variables. Despite seasonal shifts in species presence and activity, we found small differences in seasonally weighted annual photosynthetic rates among groups. However, differences in the timing of maximum assimilation (A(net)) were strongly functional group-dependent. C(3)shrubs employed a relatively consistent, low carbon capture strategy and maintained activity year-round but switched to a rapid growth strategy in response to recent climate conditions. In contrast, grasses maintained higher carbon capture during spring months when all perennials had maximum photosynthetic rates, but grasses were dormant during months when shrubs remained active. Perennial grassA(net)rates were explained in part by precipitation accumulated during the preceding year and average maximum temperatures during the past 48 h, a result opposite to shrubs. These results lend insight into diverse physiological strategies and their connections to climate, and also point to the potential for shrubs to increase in abundance in response to increased climatic variability in drylands, given shrubs' ability to respond rapidly to changing conditions.
英文关键词	Photosynthesis Drought Ecophysiology Colorado Plateau Water-use efficiency
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000553711800001
WOS关键词	NORTH-AMERICAN GRASSLANDS ; CHIHUAHUAN DESERT ; SOIL-MOISTURE ; COLORADO PLATEAU ; MOJAVE-DESERT ; GAS-EXCHANGE ; PHYSIOLOGICAL-RESPONSES ; SEMIARID ECOSYSTEMS ; BIOCHEMICAL-MODEL ; CLIMATE-CHANGE
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325282
作者单位	[Winkler, Daniel E.; Belnap, Jayne; Duniway, Michael C.; Reed, Sasha C.] US Geol Survey, Southwest Biol Sci Ctr, Moab, UT 84532 USA; [Hoover, David] ARS, USDA, Rangeland Resources & Syst Res Unit, Ft Collins, CO 80526 USA; [Yokum, Hannah; Gill, Richard] Brigham Young Univ, Dept Biol, Provo, UT 84604 USA
推荐引用方式 GB/T 7714	Winkler, Daniel E.,Belnap, Jayne,Duniway, Michael C.,et al. Seasonal and individual event-responsiveness are key determinants of carbon exchange across plant functional types[J]. United States Geological Survey,2020,193(4):811-825.
APA	Winkler, Daniel E..,Belnap, Jayne.,Duniway, Michael C..,Hoover, David.,Reed, Sasha C..,...&Gill, Richard.(2020).Seasonal and individual event-responsiveness are key determinants of carbon exchange across plant functional types.OECOLOGIA,193(4),811-825.
MLA	Winkler, Daniel E.,et al."Seasonal and individual event-responsiveness are key determinants of carbon exchange across plant functional types".OECOLOGIA 193.4(2020):811-825.