干旱区生态环境知识资源中心(Arid): Ecosystem resilience to invasion and drought: Insights after 24 years in a rare never-grazed grassland

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DOI	10.1111/gcb.16882
	Ecosystem resilience to invasion and drought: Insights after 24 years in a rare never-grazed grassland
	Duniway, Michael C.; Finger-Higgens, Rebecca; Geiger, Erika L.; Hoover, David L.; Pfennigwerth, Alix A.; Knight, Anna C.; Van Scoyoc, Matthew; Miller, Mark; Belnap, Jayne
通讯作者	Duniway, MC
来源期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
EISSN	1365-2486
出版年	2023
卷号	29 期号:20 页码:5866-5880
英文摘要	Understanding the resilience of ecosystems globally is hampered by the complex and interacting drivers of change characteristic of the Anthropocene. This is true for drylands of the western US, where widespread alteration of disturbance regimes and spread of invasive non-native species occurred with westward expansion during the 1800s, including the introduction of domestic livestock and spread of Bromus tectorum, an invasive non-native annual grass. In addition, this region has experienced a multi-decadal drought not seen for at least 1200 years with potentially large and interacting impacts on native plant communities. Here, we present 24 years of twice-annual plant cover monitoring (1997-2021) from a semiarid grassland never grazed by domestic livestock but subject to a patchy invasion of B. tectorum beginning in similar to 1994, compare our findings to surveys done in 1967, and examine potential climate drivers of plant community changes. We found a significant warming trend in the study area, with more than 75% of study year temperatures being warmer than average (1966-2021). We observed a native perennial grass community with high resilience to climate forcings with cover values like those in 1967. In invaded patches, B. tectorum cover was greatest in the early years of this study (1997-2001; similar to 20%-40%) but was subsequently constrained by climate and subtle variation in soils, with limited evidence of long-term impacts to native vegetation, contradicting earlier studies. Our ability to predict year-to-year variation in functional group and species cover with climate metrics varied, with a 12-month integrated index and fall and winter patterns appearing most important. However, declines to near zero live cover in recent years in response to regional drought intensification leave questions regarding the resiliency of intact grasslands to ongoing aridification and whether the vegetation observations reported here may be a leading indicator of impending change in this protected ecosystem.
英文关键词	Bromus tectorum Canyonlands National Park Colorado Plateau drought grassland grazing long-term monitoring resiliency
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001035740400001
WOS关键词	ALTERS NITROGEN DYNAMICS ; BROMUS-TECTORUM INVASION ; EXOTIC PLANT INVASION ; COLORADO PLATEAU ; SOIL BIOTA ; CLIMATE ; PRECIPITATION ; DESERT ; DESERTIFICATION ; RESPONSES
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
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/2XILL650/396776
推荐引用方式 GB/T 7714	Duniway, Michael C.,Finger-Higgens, Rebecca,Geiger, Erika L.,et al. Ecosystem resilience to invasion and drought: Insights after 24 years in a rare never-grazed grassland[J],2023,29(20):5866-5880.
APA	Duniway, Michael C..,Finger-Higgens, Rebecca.,Geiger, Erika L..,Hoover, David L..,Pfennigwerth, Alix A..,...&Belnap, Jayne.(2023).Ecosystem resilience to invasion and drought: Insights after 24 years in a rare never-grazed grassland.GLOBAL CHANGE BIOLOGY,29(20),5866-5880.
MLA	Duniway, Michael C.,et al."Ecosystem resilience to invasion and drought: Insights after 24 years in a rare never-grazed grassland".GLOBAL CHANGE BIOLOGY 29.20(2023):5866-5880.