气候变化领域集成服务门户(CCPortal): Fire effects on the reproductive potential of two dominant woody species along an elevation gradient in central Argentina

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DOI	10.1016/j.foreco.2024.121844
	Fire effects on the reproductive potential of two dominant woody species along an elevation gradient in central Argentina
	Alinari, Julieta; Cingolani, Ana M.; von Mueller, Axel R.; Barbera, Ivan; Renison, Daniel; Cabido, Marcelo
发表日期	2024
ISSN	0378-1127
EISSN	1872-7042
起始页码	560
卷号	560
英文摘要	Fire and elevation affect reproduction of woody species and, therefore, their distribution in the landscape; however, the effect of both factors are often confounded. In addition, plant size may also influence reproduction. Our objective was to investigate the combined effects of fire, elevation and pre-fire size on woody species reproductive potential in a seasonally dry mountain ecosystem. We tested the predictions that fire and elevation impair reproductive potential and that the negative effects of fire are enhanced at high elevation. Our study was carried out in the mountains of central Argentina, from 800 to 1700 m a.s.l. We selected individuals of two dominant resprouting woody species (Vachellia caven and Lithraea molleoides) in burned and comparable unburned areas. We estimated pre-fire size and fire damage level in each tree. We monitored parameters related to reproductive potential during four post-fire fruiting seasons in 185 V. caven and 78 L. molleoides trees. Our main results for V. caven show negative fire effects on most reproductive parameters, and on the expected number of germinable seeds per tree, which was estimated as an integrated parameter. The negative fire effects decreased over time until the fourth post-fire fruiting season, when we detected almost no fire effects. Moreover, the negative fire effects were greatly enhanced with elevation, while pre-fire size showed consistently positive effects on most reproductive parameters. For large trees located at low elevation, fire reduced the number of germinable seeds per tree by a factor of nearly six in the third post-fire fruiting season (from 2020 to 358 seeds), while at high elevation fire reduced germinable seeds by a factor of 15 (from 106 to 7 seeds) for similarly large trees. Small trees had a lower reproductive potential than large trees and the negative effects of fire were smaller but noticeable, and were enhanced by elevation, as in the case of large trees. For L. molleoides we found similar patterns to those of V. caven; however, since few trees produced seeds during the study, we did not compute formal statistics. We conclude that fire reduction should gradually increase reproductive potential, tree density and forest cover at high elevation, even when, according to previous studies, survival is not affected by fire or elevation in the study species.
英文关键词	Chaco forests; Elevation; Fire; Fruit production; Germination; Seed production
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:001214735400001
来源期刊	FOREST ECOLOGY AND MANAGEMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305770
作者单位	National University of Cordoba; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Instituto Nacional de Tecnologia Agropecuaria (INTA); Universidad Nacional del Comahue; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); National University of Cordoba
推荐引用方式 GB/T 7714	Alinari, Julieta,Cingolani, Ana M.,von Mueller, Axel R.,et al. Fire effects on the reproductive potential of two dominant woody species along an elevation gradient in central Argentina[J],2024,560.
APA	Alinari, Julieta,Cingolani, Ana M.,von Mueller, Axel R.,Barbera, Ivan,Renison, Daniel,&Cabido, Marcelo.(2024).Fire effects on the reproductive potential of two dominant woody species along an elevation gradient in central Argentina.FOREST ECOLOGY AND MANAGEMENT,560.
MLA	Alinari, Julieta,et al."Fire effects on the reproductive potential of two dominant woody species along an elevation gradient in central Argentina".FOREST ECOLOGY AND MANAGEMENT 560(2024).