气候变化领域集成服务门户(CCPortal): Sustainability and drivers of Populus tremuloides regeneration and recruitment near the southwestern edge of its range

CCPortal

DOI	10.1093/forestry/cpae018
	Sustainability and drivers of Populus tremuloides regeneration and recruitment near the southwestern edge of its range
	Crouch, Connor D.; Wilhelmi, Nicholas P.; Rogers, Paul C.; Moore, Margaret M.; Waring, Kristen M.
发表日期	2024
ISSN	0015-752X
EISSN	1464-3626
英文摘要	Quaking aspen (Populus tremuloides Michx.) ecosystems are highly valued in the southwestern United States because of the ecological, economic, and aesthetic benefits they provide. Aspen has experienced extensive mortality in recent decades, and there is evidence that many areas in Arizona, United States lack adequate recruitment to replace dying overstory trees. Maintaining sustainable levels of regeneration and recruitment (i.e. juveniles) is critical for promoting aspen ecosystem resilience and adaptive capacity, but questions remain about which factors currently limit juvenile aspen and which strategies are appropriate for managing aspen in an increasingly uncertain future. To fill these critical knowledge gaps, we sampled aspen populations across Arizona and collected data representing a suite of biotic and abiotic factors that potentially influence juvenile aspen. Specifically, we addressed two questions: (i) Is aspen sustainably regenerating and recruiting in Arizona? and (2) Which biotic and abiotic factors significantly influence aspen regeneration and recruitment? We found that many aspen populations in Arizona lack sustainable levels of juvenile aspen, and the status of recruitment was especially dire, with 40% of study plots lacking a single recruiting stem. Aspen regeneration was less abundant on warmer sites than cooler ones, highlighting the threat that a rapidly warming climate poses to aspen sustainability. Aspen recruitment was significantly more abundant in areas with recent fire than in areas without fire, and recruitment had a strong positive relationship with fire severity. The most important limiting factors for aspen recruitment were ungulate browse, especially by introduced Rocky Mountain elk (Cervus canadensis nelsoni), and the invasive insect, oystershell scale (Lepidosaphes ulmi). We conclude with a discussion of how management can promote sustainability of aspen populations by addressing the array of threats that aspen faces, such as a warming climate, chronic ungulate browse, and outbreaks of oystershell scale.
英文关键词	fire; forest health; oystershell scale; quaking aspen; structural equation modeling; ungulate exclosures
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:001206135900001
来源期刊	FORESTRY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304945
作者单位	Northern Arizona University; University of Missouri System; University of Missouri Columbia; United States Department of Agriculture (USDA); United States Forest Service; United States Department of Agriculture (USDA); United States Forest Service; Utah System of Higher Education; Utah State University
推荐引用方式 GB/T 7714	Crouch, Connor D.,Wilhelmi, Nicholas P.,Rogers, Paul C.,et al. Sustainability and drivers of Populus tremuloides regeneration and recruitment near the southwestern edge of its range[J],2024.
APA	Crouch, Connor D.,Wilhelmi, Nicholas P.,Rogers, Paul C.,Moore, Margaret M.,&Waring, Kristen M..(2024).Sustainability and drivers of Populus tremuloides regeneration and recruitment near the southwestern edge of its range.FORESTRY.
MLA	Crouch, Connor D.,et al."Sustainability and drivers of Populus tremuloides regeneration and recruitment near the southwestern edge of its range".FORESTRY (2024).