气候变化领域集成服务门户(CCPortal): Deer browsing overwhelms extended leaf phenology benefits: A test case with Rubus allegheniensis and a recalcitrant hay-scented fern layer

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DOI	10.1016/j.foreco.2019.06.019
	Deer browsing overwhelms extended leaf phenology benefits: A test case with Rubus allegheniensis and a recalcitrant hay-scented fern layer
	Royo A.A.; Stanovick J.S.
发表日期	2019
ISSN	0378-1127
起始页码	294
结束页码	299
卷号	448
英文摘要	Plant species coexistence can be promoted by multiple tradeoffs including temporal niche separation via differences in phenology. Namely, if phenological differences afford longer leaf life-spans that confer species the opportunity to exploit light and fix carbon during periods relatively free of other competitors, then coexistence, or even competitive superiority, may arise. Phenological niche separation explanations, including the Extended Leaf Phenology (ELP) hypothesis, have garnered considerable support as a mechanistic explanation for both exotic invasive species success and maintenance of native plant species. The benefits conferred by a phenological advantage, however, can be nullified if tissue losses from browsing are coincident with this phenological window of opportunity. This study experimentally tests the role of phenological advantage and white-tailed deer (Odocoileus virginianus) browsing, alone and in concert, in structuring coexistence between the native forest shrub Rubus allegheniensis, which possesses an extended phenological window, and the native invasive fern Dennstaedtia punctilobula. Browsing treatments (ambient versus excluded) were factorially crossed with shading treatments (none versus shading timed to eliminate phenological advantage). The results demonstrate the phenological advantage is an essential growth mechanism for Rubus as seedlings deprived of the ELP advantage were, on average, 50% shorter than those not treated with shade. However, this benefit was largely dependent on herbivory pressure, as deer browsing largely nullified the growth benefits provided by the phenological advantage. This experiment is the first experimental study documenting how browsing impacts affect a plant species by curtailing a phenological coexistence advantage. The results suggest elucidating the interacting roles of the ELP and browsing is critical, particularly as the phenological niche advantage does not necessarily constitute a fitness advantage where browsing pressure is high. Results from this work also provide broader insight into how exotic plant species invasions that are assumed to be aided by a phenological (ELP) advantage, may be modulated through their browse susceptibility. Overall, these results suggest understanding the co-occurring roles of phenology and browsing may guide management decisions to maintain or promote understory plant diversity. © 2019
英文关键词	Allegheny hardwoods; Competition; Odocoileus virginianus; Phenology
语种	英语
scopus关键词	Biology; Competition; Browsing pressures; Growth mechanisms; Management decisions; Niche separations; Odocoileus virginianus; Phenology; Shading treatments; White-tailed deer; Forestry; browsing; coexistence; competition (ecology); deer; experiment; experimental study; fern; fitness; invasive species; phenology; species diversity; understory; Biology; Competition; Forestry; Phenology; Plants; Pressure; Separation; Windows; Cervidae; Dennstaedtia punctilobula; Filicophyta; Mohria caffrorum; Odocoileus virginianus; Rubus; Rubus allegheniensis
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/155876
作者单位	USDA Forest Service, Northern Research Station, 335 National Forge Road, P.O. Box 267, Irvine, PA 16329, United States; USDA Forest Service, Northern Research Station, 1549 Long Pond Road, Long PondPA 18334, United States
推荐引用方式 GB/T 7714	Royo A.A.,Stanovick J.S.. Deer browsing overwhelms extended leaf phenology benefits: A test case with Rubus allegheniensis and a recalcitrant hay-scented fern layer[J],2019,448.
APA	Royo A.A.,&Stanovick J.S..(2019).Deer browsing overwhelms extended leaf phenology benefits: A test case with Rubus allegheniensis and a recalcitrant hay-scented fern layer.Forest Ecology and Management,448.
MLA	Royo A.A.,et al."Deer browsing overwhelms extended leaf phenology benefits: A test case with Rubus allegheniensis and a recalcitrant hay-scented fern layer".Forest Ecology and Management 448(2019).