气候变化领域集成服务门户(CCPortal): Temporal grazing exclusion as a passive restoration strategy in a dryland woodland: Effects over time on tree regeneration and on the shrub community

CCPortal

DOI	10.1016/j.foreco.2020.118732
	Temporal grazing exclusion as a passive restoration strategy in a dryland woodland: Effects over time on tree regeneration and on the shrub community
	Köbel M.; Listopad C.M.C.S.; Príncipe A.; Nunes A.; Branquinho C.
发表日期	2020
ISSN	0378-1127
英文摘要	Passive restoration is acknowledged as a cost-effective approach to restore forest ecosystems. In this approach, restoration implies simply ceasing the disturbance causing degradation. But an efficient allocation of restoration efforts requires an understanding of the recovery trajectories of different ecosystem components. In Mediterranean oak open woodlands (called montado in Portugal), livestock grazing drives important plant community composition changes, and may hamper tree regeneration, threatening the long-term sustainability of this ecosystem. A temporal grazing exclusion may, thus, be an efficient restoration measure. However, how beneficial changes occur with time after exclusion on tree regeneration and on the structure and diversity of the ecosystem, are less clear. In this work, we studied the effects of grazing exclusion as a passive restoration strategy on a cork oak woodland, focusing on cork oak tree (Quercus suber) regeneration and on the structure and diversity of the understory shrub community. We assessed oak seedlings and saplings abundance and height, shrub structure, compositional and functional diversity at sites with 0, 5, 9 and 13 years of grazing exclusion. Cork oak individuals were similarly abundant throughout the chronosequence, but time had a positive effect on the height of saplings, until 9 years of exclusion. Shrub cover increased within 5 years after exclusion, and remained stable thereafter. Shrub taxonomic diversity increased continuously along the chronosequence, while functional diversity did not change consistently. Our results suggest that grazing exclusion may be an effective passive restoration measure, although different components of the ecosystem have different timings of recovery. In the case of the studied cork oak woodlands, tree regeneration may be promoted by a 5–10 years period of exclusion, after which it decreases, while conservation of taxonomic shrub diversity may require at least 13 years of exclusion. Our results highlight the importance of optimizing restoration plans depending on the restoration objective. © 2020 Elsevier B.V.
英文关键词	Cork oak; Cow grazing; High Nature Value Farmland; Mediterranean; Quercus suber; Secondary succession
语种	英语
scopus关键词	Conservation; Cost effectiveness; Ecosystems; Restoration; Cost-effective approach; Ecosystem components; Efficient allocations; Efficient restoration; Functional diversity; Long-term sustainability; Passive restorations; Taxonomic diversity; Reforestation
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/155663
作者单位	cE3c, Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, edifício C2, 5° piso, Lisboa, 1749-016, Portugal; Applied Ecology Inc., 122 Fourth Ave, Suite 104 IndialanticFL 32903, United States
推荐引用方式 GB/T 7714	Köbel M.,Listopad C.M.C.S.,Príncipe A.,et al. Temporal grazing exclusion as a passive restoration strategy in a dryland woodland: Effects over time on tree regeneration and on the shrub community[J],2020.
APA	Köbel M.,Listopad C.M.C.S.,Príncipe A.,Nunes A.,&Branquinho C..(2020).Temporal grazing exclusion as a passive restoration strategy in a dryland woodland: Effects over time on tree regeneration and on the shrub community.Forest Ecology and Management.
MLA	Köbel M.,et al."Temporal grazing exclusion as a passive restoration strategy in a dryland woodland: Effects over time on tree regeneration and on the shrub community".Forest Ecology and Management (2020).