Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/jvs.12476 |
The influence of seasonal precipitation and grass competition on 20years of forb dynamics in northern Chihuahuan Desert grassland | |
Mulhouse, John M.1; Hallett, Lauren M.2,3,4; Collins, Scott L.1 | |
通讯作者 | Mulhouse, John M. |
来源期刊 | JOURNAL OF VEGETATION SCIENCE
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ISSN | 1100-9233 |
EISSN | 1654-1103 |
出版年 | 2017 |
卷号 | 28期号:2页码:250-259 |
英文摘要 | AimsIn arid grasslands forbs represent a large component of species diversity and provide a key resource for pollinators and consumers. However, low abundances and high temporal variability make it challenging to successfully predict forb presence and abundance from 1yr to the next. In this study we: (1) characterize patterns of semi-arid forb diversity and abundance over time; (2) determine the relative importance of direct vs indirect (via grass competition) effects of precipitation on forb richness and abundance; and (3) separate the effect of precipitation timing on forb community composition from the effects of precipitation amount and season. LocationSemi-arid grassland, Sevilleta National Wildlife Refuge, Socorro County, central New Mexico, USA. MethodsWe analysed forb dynamics along two 400-m long line-intercept transects in response to inter-annual and seasonal precipitation variability and abundance of perennial grasses using a unique 20-yr species composition data set from ungrazed native grassland in the northern Chihuahuan Desert. ResultsForb richness and cover were significantly positively associated with precipitation across seasons. Total richness was high across the time series but substantially lower within any given year. A direct, positive effect of precipitation overrode any potential negative, indirect effect via grass competition. Although aggregate forb responses were strongly linked with precipitation, individual species responses were highly variable and generally not linked with either precipitation timing or season. ConclusionsIn the hotter, drier climate predicted by meteorological models for the US southwest, forbs may be negatively impacted if winter moisture decreases and monsoon precipitation becomes more variable. On the other hand, the flexibility exhibited by forbs in germination and establishment throughout the growing season may help buffer some common species to increased inter-annual precipitation variability. |
英文关键词 | Chihuahuan Desert Core-satellite hypothesis Forbs Grasslands Species richness Temporal distribution pattern Vegetation dynamics |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000397559100003 |
WOS关键词 | NET PRIMARY PRODUCTION ; CLIMATE-CHANGE ; ARIDLAND ECOSYSTEM ; TEMPORAL DYNAMICS ; PLANT-COMMUNITIES ; TALLGRASS PRAIRIE ; SPATIAL-PATTERNS ; UNITED-STATES ; NEW-MEXICO ; VARIABILITY |
WOS类目 | Plant Sciences ; Ecology ; Forestry |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Forestry |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/200876 |
作者单位 | 1.Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA; 2.Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80303 USA; 3.Univ Oregon, Environm Studies Program, Eugene, OR 97403 USA; 4.Univ Oregon, Dept Biol, Eugene, OR 97403 USA |
推荐引用方式 GB/T 7714 | Mulhouse, John M.,Hallett, Lauren M.,Collins, Scott L.. The influence of seasonal precipitation and grass competition on 20years of forb dynamics in northern Chihuahuan Desert grassland[J],2017,28(2):250-259. |
APA | Mulhouse, John M.,Hallett, Lauren M.,&Collins, Scott L..(2017).The influence of seasonal precipitation and grass competition on 20years of forb dynamics in northern Chihuahuan Desert grassland.JOURNAL OF VEGETATION SCIENCE,28(2),250-259. |
MLA | Mulhouse, John M.,et al."The influence of seasonal precipitation and grass competition on 20years of forb dynamics in northern Chihuahuan Desert grassland".JOURNAL OF VEGETATION SCIENCE 28.2(2017):250-259. |
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