干旱区生态环境知识资源中心(Arid): Plant Species Richness in Multiyear Wet and Dry Periods in the Chihuahuan Desert

Arid

DOI	10.3390/cli9080130
	Plant Species Richness in Multiyear Wet and Dry Periods in the Chihuahuan Desert
	Peters, Debra P. C.; Savoy, Heather M.; Stillman, Susan; Huang, Haitao; Hudson, Amy R.; Sala, Osvaldo E.; Vivoni, Enrique R.
通讯作者	Peters, DPC (corresponding author), USDA, SCINet Program Sci Comp, Beltsville, MD 20705 USA. ; Peters, DPC (corresponding author), USDA, Jornada Range Unit, Las Cruces, NM 88003 USA. ; Peters, DPC (corresponding author), New Mexico State Univ, Jornada Basin Long Term Ecol Res Program, Las Cruces, NM 88003 USA.
来源期刊	CLIMATE
EISSN	2225-1154
出版年	2021
卷号	9 期号:8
英文摘要	In drylands, most studies of extreme precipitation events examine effects of individual years or short-term events, yet multiyear periods (>3 y) are expected to have larger impacts on ecosystem dynamics. Our goal was to take advantage of a sequence of multiple long-term (4-y) periods (dry, wet, average) that occurred naturally within a 26-y time frame to examine responses of plant species richness to extreme rainfall in grasslands and shrublands of the Chihuahuan Desert. Our hypothesis was that richness would be related to rainfall amount, and similar in periods with similar amounts of rainfall. Breakpoint analyses of water-year precipitation showed five sequential periods (1993-2018): AVG1 (mean = 22 cm/y), DRY1 (mean = 18 cm/y), WET (mean = 30 cm/y), DRY2 (mean = 18 cm/y), and AVG2 (mean = 24 cm/y). Detailed analyses revealed changes in daily and seasonal metrics of precipitation over the course of the study: the amount of nongrowing season precipitation decreased since 1993, and summer growing season precipitation increased through time with a corresponding increase in frequency of extreme rainfall events. This increase in summer rainfall could explain the general loss in C-3 species after the wet period at most locations through time. Total species richness in the wet period was among the highest in the five periods, with the deepest average storm depth in the summer and the fewest long duration (>45 day) dry intervals across all seasons. For other species-ecosystem combinations, two richness patterns were observed. Compared to AVG2, AVG1 had lower water-year precipitation yet more C-3 species in upland grasslands, creosotebush, and mesquite shrublands, and more C-4 perennial grasses in tarbush shrublands. AVG1 also had larger amounts of rainfall and more large storms in fall and spring with higher mean depths of storm and lower mean dry-day interval compared with AVG2. While DRY1 and DRY2 had the same amount of precipitation, DRY2 had more C-4 species than DRY1 in creosote bush shrublands, and DRY1 had more C-3 species than DRY2 in upland grasslands. Most differences in rainfall between these periods occurred in the summer. Legacy effects were observed for C-3 species in upland grasslands where no significant change in richness occurred from DRY1 to WET compared with a 41% loss of species from the WET to DRY2 period. The opposite asymmetry pattern was found for C-4 subdominant species in creosote bush and mesquite shrublands, where an increase in richness occurred from DRY1 to WET followed by no change in richness from WET to DRY2. Our results show that understanding plant biodiversity of Chihuahuan Desert landscapes as precipitation continues to change will require daily and seasonal metrics of rainfall within a wet-dry period paradigm, as well as a consideration of species traits (photosynthetic pathways, lifespan, morphologies). Understanding these relationships can provide insights into predicting species-level dynamics in drylands under a changing climate.
英文关键词	climate change extreme events breakpoint analysis Chihuahuan Desert black grama grasslands mesquite shrublands precipitation characteristics multiyear periods legacies
类型	Article
语种	英语
开放获取类型	gold
收录类别	ESCI
WOS记录号	WOS:000688905900001
WOS关键词	NET PRIMARY PRODUCTION ; PRECIPITATION VARIABILITY ; SOIL-WATER ; EXTREME PRECIPITATION ; SPATIAL HETEROGENEITY ; ECOSYSTEM STABILITY ; GRASSLAND RESPONSES ; ROOT SYSTEMS ; PRODUCTIVITY ; DIVERSITY
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	Arizona State University ; New Mexico State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362871
作者单位	[Peters, Debra P. C.; Savoy, Heather M.; Stillman, Susan; Huang, Haitao; Hudson, Amy R.] USDA, SCINet Program Sci Comp, Beltsville, MD 20705 USA; [Peters, Debra P. C.] USDA, Jornada Range Unit, Las Cruces, NM 88003 USA; [Peters, Debra P. C.; Savoy, Heather M.; Sala, Osvaldo E.; Vivoni, Enrique R.] New Mexico State Univ, Jornada Basin Long Term Ecol Res Program, Las Cruces, NM 88003 USA; [Sala, Osvaldo E.] Arizona State Univ, Sch Life Sci, Tempe, AZ 85281 USA; [Sala, Osvaldo E.] Arizona State Univ, Sch Sustainabil, Tempe, AZ 85281 USA; [Sala, Osvaldo E.; Vivoni, Enrique R.] Arizona State Univ, Global Drylands Ctr, Tempe, AZ 85281 USA; [Vivoni, Enrique R.] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA; [Vivoni, Enrique R.] Arizona State Univ, Sch Sustainable Engn & Built Environm, Tempe, AZ 85287 USA
推荐引用方式 GB/T 7714	Peters, Debra P. C.,Savoy, Heather M.,Stillman, Susan,et al. Plant Species Richness in Multiyear Wet and Dry Periods in the Chihuahuan Desert[J]. Arizona State University, New Mexico State University,2021,9(8).
APA	Peters, Debra P. C..,Savoy, Heather M..,Stillman, Susan.,Huang, Haitao.,Hudson, Amy R..,...&Vivoni, Enrique R..(2021).Plant Species Richness in Multiyear Wet and Dry Periods in the Chihuahuan Desert.CLIMATE,9(8).
MLA	Peters, Debra P. C.,et al."Plant Species Richness in Multiyear Wet and Dry Periods in the Chihuahuan Desert".CLIMATE 9.8(2021).