干旱区生态环境知识资源中心(Arid): Traits link drought resistance with herbivore defence and plant economics in semi-arid grasslands: The central roles of phenology and leaf dry matter content

Arid

DOI	10.1111/1365-2745.13454
	Traits link drought resistance with herbivore defence and plant economics in semi-arid grasslands: The central roles of phenology and leaf dry matter content
	Blumenthal, Dana M.; Mueller, Kevin E.; Kray, Julie A.; Ocheltree, Troy W.; Augustine, David J.; Wilcox, Kevin R.
通讯作者	Blumenthal, DM
来源期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
EISSN	1365-2745
出版年	2020
卷号	108 期号:6 页码:2336-2351
英文摘要	Despite progress in trait-based ecology, there is limited understanding of the plant traits that structure semi-arid grasslands. In particular, it remains unclear how traits that enable plants to cope with water limitation are related to traits that influence other key functions such as herbivore defence and growth. The hypothesis that drought and herbivory exert convergent selection pressures is supported for morphological traits, but largely untested for structural, physiological and phenological traits. Drought and economic traits can also covary, but where and to what degree remains uncertain. Here we address these uncertainties in semi-arid shortgrass steppe and mixedgrass prairie, the largest remaining grasslands in North America. Using a broad selection of traits for 37 of the most common plant species in each ecosystem, we ask whether traits that confer drought tolerance, avoidance and escape covary with herbivore resistance traits and economic traits. Results reveal that both drought tolerance and escape are coordinated with other functions, but in opposite fashion. Drought-tolerant species (low leaf osmotic potential and high leaf dry matter content, LDMC) were also herbivore resistant (high leaf toughness and cellulose) and at the 'slow' end of the economic spectrum (low leaf nitrogen, leaf phosphorus and high stem density). Conversely, drought escape via early senescence was associated with lower drought tolerance, lower herbivore resistance and 'fast' economic traits. Drought avoidance, as indicated by thick leaves, may also be associated with lower drought tolerance (LDMC). Senescence date and LDMC appear to be key traits in these semi-arid grasslands, differentiating species along multiple axes of function. Synthesis. Covariation between drought, herbivory and economic traits means that, of the many potential trait combinations, few actually exist within these grasslands. Consequently, changes in land management and climate should have predictable effects on drought resistance, forage quality and productivity in the western Great Plains.
英文关键词	drought escape drought tolerance herbivore defence leaf dry matter content mixedgrass prairie plant economics semi-arid grasslands shortgrass steppe
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000560547600001
WOS关键词	ELEVATED CO2 ; SHORTGRASS STEPPE ; HYDRAULIC TRAITS ; FUNCTIONAL TYPES ; FORAGE QUALITY ; CLIMATE-CHANGE ; SOIL-WATER ; TOLERANCE ; THICKNESS ; AREA
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
来源机构	Colorado State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325684
作者单位	[Blumenthal, Dana M.; Kray, Julie A.; Augustine, David J.] USDA ARS, Rangeland Resources & Syst Res Unit, Ft Collins, CO 80522 USA; [Mueller, Kevin E.] Cleveland State Univ, Dept Biol Geol & Environm Sci, Cleveland, OH 44115 USA; [Ocheltree, Troy W.] Colorado State Univ, Dept Forest & Rangeland Stewardship, Ft Collins, CO 80523 USA; [Wilcox, Kevin R.] Univ Wyoming, Dept Ecosyst Sci & Management, Laramie, WY 82071 USA
推荐引用方式 GB/T 7714	Blumenthal, Dana M.,Mueller, Kevin E.,Kray, Julie A.,et al. Traits link drought resistance with herbivore defence and plant economics in semi-arid grasslands: The central roles of phenology and leaf dry matter content[J]. Colorado State University,2020,108(6):2336-2351.
APA	Blumenthal, Dana M.,Mueller, Kevin E.,Kray, Julie A.,Ocheltree, Troy W.,Augustine, David J.,&Wilcox, Kevin R..(2020).Traits link drought resistance with herbivore defence and plant economics in semi-arid grasslands: The central roles of phenology and leaf dry matter content.JOURNAL OF ECOLOGY,108(6),2336-2351.
MLA	Blumenthal, Dana M.,et al."Traits link drought resistance with herbivore defence and plant economics in semi-arid grasslands: The central roles of phenology and leaf dry matter content".JOURNAL OF ECOLOGY 108.6(2020):2336-2351.