干旱区生态环境知识资源中心(Arid): Phenological patterns in the desert spring ephemeral Astragalus holmgreniorum Barneby (Fabaceae)

Arid

DOI	10.3398/064.079.0303
	Phenological patterns in the desert spring ephemeral Astragalus holmgreniorum Barneby (Fabaceae)
	Rominger, Kody R.; Meyer, Susan H.; Van Buren, Renee; Searle, Allyson B.
通讯作者	Meyer, SH (corresponding author), US Forest Serv, Rocky Mt Res Stn, Shrub Sci Lab, Provo, UT 84606 USA.
来源期刊	WESTERN NORTH AMERICAN NATURALIST
ISSN	1527-0904
EISSN	1944-8341
出版年	2019
卷号	79 期号:3 页码:308-322
英文摘要	Herbaceous perennial species may exhibit winter or summer dormancy, or they may be spring ephemerals with dormancy extending from summer through winter. Herbaceous perennials, and spring ephemerals in particular, are most common in strongly seasonal but relatively mesic temperate environments. Warm deserts are typically dominated by shrubs and annuals that are better adapted to withstand or avoid severe summer heat. Astragalus holmgreniorum Barneby (Fabaceae) is a perennial spring ephemeral that has a restricted distribution at the northeastern edge of the Mojave Desert. We explored factors that regulate its phenological development in an observational study at 2 sites over 2 growing seasons. We examined consequences of weather variation in terms of phenological patterns and their effect on survival, growth, and reproductive output. Both seedling emergence and reinitiation of shoot growth occurred in early spring, with timing varying by site arid year. Flowering peaked in early April each year regardless of weather variation. Plants ceased aboveground activity as daily maximum temperatures exceeded 30 degrees C in May. Between-year variation in winter-spring precipitation timing had significant effects on growth, survival, and reproductive output in 2 years with similar above-average total precipitation. Early-season precipitation favored high seedling emergence, whereas midseason precipitation favored increased growth and flowering of adult plants, high fruit set, and high seedling survival, and late-season precipitation favored high seed set. Our study showed that variation in precipitation timing can have major impacts on plant success in a desert environment, even in years with similar above-average total precipitation.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000495386500003
WOS关键词	PROLONGED DORMANCY ; PLANTS ; CONSEQUENCES ; ECOLOGY
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369494
作者单位	[Rominger, Kody R.; Van Buren, Renee; Searle, Allyson B.] Utah Valley Univ, Dept Biol, Orem, UT 84058 USA; [Meyer, Susan H.] US Forest Serv, Rocky Mt Res Stn, Shrub Sci Lab, Provo, UT 84606 USA
推荐引用方式 GB/T 7714	Rominger, Kody R.,Meyer, Susan H.,Van Buren, Renee,et al. Phenological patterns in the desert spring ephemeral Astragalus holmgreniorum Barneby (Fabaceae)[J],2019,79(3):308-322.
APA	Rominger, Kody R.,Meyer, Susan H.,Van Buren, Renee,&Searle, Allyson B..(2019).Phenological patterns in the desert spring ephemeral Astragalus holmgreniorum Barneby (Fabaceae).WESTERN NORTH AMERICAN NATURALIST,79(3),308-322.
MLA	Rominger, Kody R.,et al."Phenological patterns in the desert spring ephemeral Astragalus holmgreniorum Barneby (Fabaceae)".WESTERN NORTH AMERICAN NATURALIST 79.3(2019):308-322.