气候变化领域集成服务门户(CCPortal): Light, temperature and understorey cover predominantly affect early life stages of tree seedlings in a multifactorial mesocosm experiment

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DOI	10.1016/j.foreco.2020.117907
	Light, temperature and understorey cover predominantly affect early life stages of tree seedlings in a multifactorial mesocosm experiment
	De Lombaerde E.; Blondeel H.; Baeten L.; Landuyt D.; Perring M.P.; Depauw L.; Maes S.L.; Wang B.; Verheyen K.
发表日期	2020
ISSN	0378-1127
卷号	461
英文摘要	Increasing light availability by opening up the forest canopy is a key tool for forest managers to stimulate natural regeneration of trees. Tree seedlings are also impacted by a complex set of global change drivers and understorey vegetation. Here, we investigated if (altered) environmental resources and conditions due to global change, and understorey vegetation modulate tree seedling responses, i.e. emergence, survival, growth and biomass allocation, to enhanced light availability. Seeds and seedlings of three species (Quercus robur, Fagus sylvatica and Acer pseudoplatanus) were planted in a multifactorial experiment. Understorey communities were grown in 384 mesocosms on soils from ancient and post-agricultural forest, forested before 1850 and after 1950, respectively. The mesocosms were exposed to two-level full-factorial treatments of light addition, warming and nitrogen enrichment. We measured understorey vegetation cover and height, scored tree seedling emergence and seed predation, measured seedling survival during two growing seasons and measured growth after two growing seasons. We found that emergence and early survival formed critical bottlenecks for seedling establishment. Seed predation formed a barrier to emergence, while cover of understorey vegetation reduced seedling survival. The life stages of the three species were varyingly affected by the different treatments, but predominantly by light addition and warming in a positive way. We found few significant interactions between light and the other treatments, presenting limited evidence of the other drivers modulating seedling responses to increased light availability. With our experiment, we were able to further disentangle the confounding effects of light availability and warming on seedling performance. Our results confirm that managers likely facilitate tree regeneration when opening the canopy by increasing both light availability and temperature, even by slight amounts, at the forest floor. However, managers need to be aware of unintended consequences of their actions as too great an increase in understorey vegetation cover may be detrimental to seedling establishment. © 2020 Elsevier B.V.
英文关键词	Climate change; Herb layer; Mesocosm; Multifactorial experiment; Nitrogen addition; Open top chambers; Past land use; Tree recruitment
语种	英语
scopus关键词	Climate change; Land use; Managers; Vegetation; Herb layer; Mesocosms; Nitrogen additions; Open top chambers; Tree recruitments; Reforestation; biomass allocation; climate change; deciduous forest; developmental stage; forest canopy; herb; light availability; light effect; mesocosm; nitrogen; open-top chamber; regeneration; seedling; temperature effect; understory; Coverings; Land Use; Light; Plants; Reforestation; Survival; Trees; Acer pseudoplatanus; Fagus sylvatica; Quercus robur
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/155429
作者单位	Forest & Nature Lab, Campus Gontrode, Faculty of Bioscience Engineering, Ghent University, Geraardsbergsesteenweg 267, Melle-Gontrode, 9090, Belgium; Ecosystem Restoration and Intervention Ecology Research Group, School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia
推荐引用方式 GB/T 7714	De Lombaerde E.,Blondeel H.,Baeten L.,et al. Light, temperature and understorey cover predominantly affect early life stages of tree seedlings in a multifactorial mesocosm experiment[J],2020,461.
APA	De Lombaerde E..,Blondeel H..,Baeten L..,Landuyt D..,Perring M.P..,...&Verheyen K..(2020).Light, temperature and understorey cover predominantly affect early life stages of tree seedlings in a multifactorial mesocosm experiment.Forest Ecology and Management,461.
MLA	De Lombaerde E.,et al."Light, temperature and understorey cover predominantly affect early life stages of tree seedlings in a multifactorial mesocosm experiment".Forest Ecology and Management 461(2020).