气候变化领域集成服务门户(CCPortal): Regeneration niches in Nothofagus-dominated old-growth forests after partial disturbance: Insights to overcome arrested succession

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DOI	10.1016/j.foreco.2019.05.004
	Regeneration niches in Nothofagus-dominated old-growth forests after partial disturbance: Insights to overcome arrested succession
	Soto D.P.; Puettmann K.J.; Fuentes C.; Jacobs D.F.
发表日期	2019
ISSN	0378-1127
起始页码	26
结束页码	36
卷号	445
英文摘要	Arrested succession may lead to losses of productivity and biodiversity in forests after disturbance. In this condition, recalcitrant understory vegetation often dominates over long periods of time and delays forest recovery and succession. Arrested succession has been defined as a type of forest degradation because ecosystem processes and functions that underlie successional dynamics are dramatically reduced. We used the Hutchinson’ niche concept to understand the relative importance of environmental variables that define niche axes of species leading to arrested succession (recalcitrant understory vegetation)and to identify a shift along niche axes that promote the successional progression of long-lived early- and late-seral tree regeneration after partial disturbance due to restoration treatments. We studied Nothofagus old-growth forests in the Chilean Andes, where after selective harvests (i.e., a partial overstory disturbance)the understory is commonly dominated by dense thickets of native bamboo (Chusquea spp.), which has been shown to arrest succession by preventing tree regeneration. To overcome this, sites are typically partially scarified (24 to 45% of the area)following harvest to control bamboo and to encourage early-seral tree regeneration. The partial overstory and ground disturbance leaves a wide array of conditions (environmental gradient)that allowed us to investigate the factors under which a given plant group may regenerate, grow, and dominate the forest. Ordination and niche modeling were used to investigate the niche breadths for bamboo and regenerating tree species, as well as the environmental niche axes at this early successional stage, i.e., eight years after disturbance. The results showed different trends in the shift of centroid and extent of realized niches among three plant groups. For instance, performance of the early-seral group was related to litter cover (–), exposed mineral soil (+)and soil water content (+), which resulted in a niche expansion. In contrast, soil water content affected bamboo (–)and may be responsible for the reduction in realized niche space. Light had less influence on defining niches for tree regeneration during early successional stages. Linking the niche concept to succession provided a simple display of multifaceted issues and thus a better understanding of underlying processes and mechanisms. It provides an example of how application of this concept can help to determine situations in which such regeneration can (or cannot)be established successfully and promote the progression of succession following disturbance. This knowledge provides important insights for designing management and restoration practices based on strong ecological foundations. © 2019 Elsevier B.V.
英文关键词	Forest regeneration; Forest restoration; Niche theory; Plant traits; Realized niche; Resilience; Succession
语种	英语
scopus关键词	Bamboo; Biodiversity; Conservation; Reforestation; Restoration; Soil moisture; Vegetation; Forest regeneration; Forest restoration; Niche theories; Plant traits; Realized niche; Resilience; Succession; Ecology; bamboo; disturbance; ecosystem resilience; forest ecosystem; niche; old-growth forest; plant community; restoration ecology; soil water; succession; tree; understory; Bamboo; Biodiversity; Conservation; Plants; Reforestation; Restoration; Andes; Chile; Chusquea; Nothofagus
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/155964
作者单位	Departamento de Ciencias Naturales y Tecnología, Universidad de Aysén, Obispo Vielmo 62, Coyhaique, Chile; Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR 97331, United States; Department of Statistics, Oregon State University, Corvallis, OR 97331, United States; Hardwood Tree Improvement and Regeneration Center, Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, United States
推荐引用方式 GB/T 7714	Soto D.P.,Puettmann K.J.,Fuentes C.,et al. Regeneration niches in Nothofagus-dominated old-growth forests after partial disturbance: Insights to overcome arrested succession[J],2019,445.
APA	Soto D.P.,Puettmann K.J.,Fuentes C.,&Jacobs D.F..(2019).Regeneration niches in Nothofagus-dominated old-growth forests after partial disturbance: Insights to overcome arrested succession.Forest Ecology and Management,445.
MLA	Soto D.P.,et al."Regeneration niches in Nothofagus-dominated old-growth forests after partial disturbance: Insights to overcome arrested succession".Forest Ecology and Management 445(2019).