干旱区生态环境知识资源中心(Arid): Wildfire and floral herbivory alter reproduction and pollinator mutualisms of Yuccas and Yucca moths

Arid

	Wildfire and floral herbivory alter reproduction and pollinator mutualisms of Yuccas and Yucca moths
	Lybbert Andrew H; Clair Samuel B St
来源期刊	Journal of Plant Ecology
ISSN	1752-9921
出版年	2017
卷号	10 期号:5 页码:851-858
英文摘要	Aims Wildfire and ungulate herbivore pressure are increasing globally due to human activities, including arid ecosystems that are sensitive to disturbance, and are highly dependent on pollinator mutualisms. We evaluated how wildfire and ungulate herbivore pressure influence plant reproductive success and pollinator mutualisms. Methods We evaluated flower production, floral herbivory, pollinator visitation and fruit set of two Yucca species with highly specialized pollinator mutualisms (Yucca baccata and Yucca brevifolia) in unburned and burned landscapes created by fires that occurred in the Mojave Desert in 2005. Important Findings Yucca baccata plants in burned landscapes had a greater proportion of flowering individuals than plants in unburned areas (23 versus 12%). All Y. brevifolia individuals in burned and unburned landscapes produced flowers. Sixty-four percent of Y. baccata inflorescences were removed due to herbivory by cattle in burned areas, compared to 51% in unburned locations. Forty-two percent of Y. brevifolia inflorescences on branches ≤2 m in height were removed in burned areas due to cattle herbivory compared to 39% in unburned locations. However, we did not observe any inflorescence removal on Y. brevifolia branches >2 m where the majority of Y. brevifolia inflorescences are produced. Yucca moths, the only known pollinators of these two species, visited Y. brevifolia uniformly in burned and unburned areas but failed to visit Y. baccata altogether. Yucca brevifolia had strong fruit production, but not a single fruit was produced among the thousands of flowering Y. baccata plants surveyed. Floral herbivory and the loss of obligate pollinator mutualisms appear to be critical threats to the long-term viability of Y. baccata populations in this landscape. The reproductive resilience of Y. brevifolia and the maintenance of its pollinator populations appear to be due to its taller stature, which allows vertical escape of flowers from ungulate herbivores. Removal of livestock during the flowering period appears to be a critical first step to restoring Y. baccata's pollinator mutualisms and capacity for sexual reproduction.
英文关键词	cattle disturbance Mojave Desert pollination Yucca brevifolia Yucca baccata
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6099228
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335868
作者单位	Lybbert Andrew H, Department of Evolution, Ecology and Organismal Biology, The Ohio State University, Columbus, 43210, USA.; Clair Samuel B St, Department of Plant and Wildlife Sciences, Brigham Young University, Provo, 84602, USA.
推荐引用方式 GB/T 7714	Lybbert Andrew H,Clair Samuel B St. Wildfire and floral herbivory alter reproduction and pollinator mutualisms of Yuccas and Yucca moths[J],2017,10(5):851-858.
APA	Lybbert Andrew H,&Clair Samuel B St.(2017).Wildfire and floral herbivory alter reproduction and pollinator mutualisms of Yuccas and Yucca moths.Journal of Plant Ecology,10(5),851-858.
MLA	Lybbert Andrew H,et al."Wildfire and floral herbivory alter reproduction and pollinator mutualisms of Yuccas and Yucca moths".Journal of Plant Ecology 10.5(2017):851-858.