Arid
DOI10.1007/s00442-018-4137-z
Niche opportunities for invasive annual plants in dryland ecosystems are controlled by disturbance, trophic interactions, and rainfall
Gill, Richard A.1; O’Connor, Rory C.1,2; Rhodes, Aaron3; Bishop, Tara B. B.3; Laughlin, Daniel C.4,5; St Clair, Samuel B.3
通讯作者Gill, Richard A.
来源期刊OECOLOGIA
ISSN0029-8549
EISSN1432-1939
出版年2018
卷号187期号:3页码:755-765
英文摘要

Resource availability and biotic interactions control opportunities for the establishment and expansion of invasive species. Studies on biotic resistance to plant invasions have typically focused on competition and occasionally on herbivory, while resource-oriented studies have focused on water or nutrient pulses. Through synthesizing these approaches, we identify conditions that create invasion opportunities. In a nested fully factorial experiment, we examined how chronic alterations in water availability and rodent density influenced the density of invasive species in both the Mojave Desert and the Great Basin Desert after fire. We used structural equation modeling to examine the direct and mediated effects controlling the density of invasives in both deserts. In the first 2 years after our controlled burn in the Great Basin, we observed that fire had a direct effect on increasing the invasive forb Halogeton glomeratus as well as a mediated effect through reducing rodent densities and herbivory. 4 years after the burn, the invasive annual grass Bromus tectorum was suppressing Halogeton glomeratus in mammal exclusion plots. There was a clear transition from years where invasives were controlled by disturbance and trophic interactions to years were resource availability and competition controlled invasive density. Similarly, in the Mojave Desert we observed a strong early influence of trophic processes on invasives, with Schismus arabicus benefitted by rodents and Bromus rubens negatively influenced by rodents. In the Mojave Desert, post-fire conditions became less important in controlling the abundance of invasives over time, while Bromus rubens was consistently benefitted by increases in fall rainfall.


英文关键词Niche opportunity Invasive species Precipitation manipulation Fire Rodents
类型Article
语种英语
国家USA ; New Zealand
收录类别SCI-E
WOS记录号WOS:000436242000016
WOS关键词MOJAVE DESERT ; BIOTIC RESISTANCE ; EXOTIC PLANT ; PRECIPITATION VARIABILITY ; RESOURCE AVAILABILITY ; BIOLOGICAL INVASIONS ; SUCCESSFUL INVADERS ; SEED PREDATION ; CLIMATE-CHANGE ; FIRE
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/211872
作者单位1.Brigham Young Univ, Dept Biol, Provo, UT 84602 USA;
2.Kansas State Univ, Div Biol, Ackert Hall, Manhattan, KS 66506 USA;
3.Brigham Young Univ, Dept Plant & Wildlife Sci, Provo, UT 84602 USA;
4.Univ Waikato, Environm Res Inst, Private Bag 3105, Hamilton 3240, New Zealand;
5.Univ Waikato, Sch Sci, Private Bag 3105, Hamilton 3240, New Zealand
推荐引用方式
GB/T 7714
Gill, Richard A.,O’Connor, Rory C.,Rhodes, Aaron,et al. Niche opportunities for invasive annual plants in dryland ecosystems are controlled by disturbance, trophic interactions, and rainfall[J],2018,187(3):755-765.
APA Gill, Richard A.,O’Connor, Rory C.,Rhodes, Aaron,Bishop, Tara B. B.,Laughlin, Daniel C.,&St Clair, Samuel B..(2018).Niche opportunities for invasive annual plants in dryland ecosystems are controlled by disturbance, trophic interactions, and rainfall.OECOLOGIA,187(3),755-765.
MLA Gill, Richard A.,et al."Niche opportunities for invasive annual plants in dryland ecosystems are controlled by disturbance, trophic interactions, and rainfall".OECOLOGIA 187.3(2018):755-765.
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