干旱区生态环境知识资源中心(Arid): Invasive grasses: A new perfect storm for forested ecosystems?

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DOI	10.1016/j.foreco.2020.117985
	Invasive grasses: A new perfect storm for forested ecosystems?
	Kerns, Becky K.1; Tortorelli, Claire 2; Day, Michelle A.3; Nietupski, Ty 2; Barros, Ana M. G.2; Kim, John B.1; Krawchuk, Meg A.2
通讯作者	Kerns, Becky K.
来源期刊	FOREST ECOLOGY AND MANAGEMENT
ISSN	0378-1127
EISSN	1872-7042
出版年	2020
卷号	463
英文摘要	Exotic grasses are a widespread set of invasive species that are notable for their ability to significantly alter key aspects of ecosystem function. Understanding the role and importance of these invaders in forested landscapes has been limited but is now rising, as grasses from Eurasia and Africa continue to spread through ecosystems of the Americas, Australia, and many Pacific islands, where they threaten biodiversity and alter various aspects of the fire regime. The ecological, social and economic impacts of the grass-fire cycle associated with species such as cheatgrass (Bromus tectorum) have been long recognized in aridlands such as the iconic sagebrush ecosystems of the western US. However, the damaging impacts of invasive grasses in forestlands have received considerably less attention. We review literature, conceptual models, model output, and empirical evidence that indicate grass invasion in forest ecosystems may be an important yet largely under-recognized phenomenon. In combination with climate change, wildfire, and overstory management, invasive grasses could create a perfect storm that threatens forest resilience. Invasive grasses can be successful in forested environments or develop strongholds within forested mosaics and could provide the literal seeds for rapid change and vegetation type conversion catalyzed by wildfire or changes in climate. Although invasive grass populations may now be on the edge of forests or consist of relatively rare populations with limited spatial extent, these species may disrupt stabilizing feedbacks and disturbance regimes if a grass-fire cycle takes hold, forcing large portions of forests into alternative nonforested states. In addition, forest management actions such as thinning, prescribed fire, and fuel reduction may actually exacerbate invasive grass populations and increase the potential for further invasion, as well as broader landscape level changes through increased fire spread and frequency. Lack of understanding regarding the ecological consequences and importance of managing invasive grasses as a fuel may lead to unintended consequences and outcomes as we enter an age of novel and rapid ecological changes. This paper focuses on the contributory factors, mechanisms, and interactions that may set the stage for unexpected forest change and loss, in an effort to raise awareness about the potential damaging impact of grass invasion in forested ecosystems.
英文关键词	Climate change Disturbance interactions Fire Forest Fuel treatment Grass-fire Overstory Wildfire
类型	Review
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000528190400001
WOS关键词	CLIMATE-CHANGE ; FIRE BEHAVIOR ; BIOLOGICAL INVASIONS ; IMPERATA-CYLINDRICA ; MELINIS-MINUTIFLORA ; VEGETATION SHIFTS ; PLANT INVASIONS ; RANGE EXPANSION ; EXOTIC GRASSES ; SONORAN DESERT
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314528
作者单位	1.US Forest Serv, USDA, Pacific NW Res Stn, Corvallis, OR 97331 USA; 2.Oregon State Univ, Coll Forestry, Corvallis, OR 97331 USA; 3.US Forest Serv, Rocky Mt Res Stn, Corvallis, OR USA
推荐引用方式 GB/T 7714	Kerns, Becky K.,Tortorelli, Claire,Day, Michelle A.,et al. Invasive grasses: A new perfect storm for forested ecosystems?[J],2020,463.
APA	Kerns, Becky K..,Tortorelli, Claire.,Day, Michelle A..,Nietupski, Ty.,Barros, Ana M. G..,...&Krawchuk, Meg A..(2020).Invasive grasses: A new perfect storm for forested ecosystems?.FOREST ECOLOGY AND MANAGEMENT,463.
MLA	Kerns, Becky K.,et al."Invasive grasses: A new perfect storm for forested ecosystems?".FOREST ECOLOGY AND MANAGEMENT 463(2020).