干旱区生态环境知识资源中心(Arid): In Mediterranean drylands microclimate affects more tree seedlings than adult trees

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DOI	10.1016/j.ecolind.2019.105476
	In Mediterranean drylands microclimate affects more tree seedlings than adult trees
	Principe, Adriana 1; Matos, Paula 1; Sarris, Dimitrios 2,3,4; Gaiola, Giulia 1; do Rosario, Lacio 5; Correia, Otilia 1; Branquinho, Cristina 1
通讯作者	Branquinho, Cristina
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2019
卷号	106
英文摘要	Topography creates contrasting microclimates, especially between northern and southern slopes in drylands, which result in clear differences of tree cover patterns in the landscape. These local-scale differences in tree cover patterns may result from limitations occurring at different plant development stages, such as seed germination, seedling establishment, tree growth rate and survival, all crucial for the maintenance and expansion of plant populations through natural regeneration. Holm oak (Quercus rotundifolia Lam.) is a key tree species in Mediterranean drylands. We aim at measuring the impact of microclimatic conditions on holm oak trees regeneration success using traits as indicators of adult tree performance in an average climatic year and tree's distribution pattern at the landscape level as an indicator of tree establishment success. We hypothesize that under contrasting microclimatic conditions, seedlings performance is limiting the regeneration potential of holm oak trees rather than adult trees physiological performance. To quantify the microclimatic conditions originated by topography, two indicators were used: i) Potential Solar Radiation, as the amount of potential solar energy reaching the site above tree canopy; and ii) functional lichen diversity, as ecological indicators of microclimatic conditions under the tree canopy. The performance of holm oak was assessed on 40 adult trees growing in contrasting microclimatic conditions (high and low Potential Solar Radiation sites). Several indicators based on leaf, tree and stand response traits, frequently used as ecological indicators to evaluate tree performance and susceptibility to drought stress, were selected: specific leaf area, leaf reflectance indices, tree size, tree growth rate, tree age and tree density. We found that leaf physiological performance was similar under contrasting microclimatic conditions. However, in areas with higher Potential Solar Radiation tree age and density were significantly reduced. These results suggest that microclimatic differences located in southern slopes with high Potential Solar Radiation are limiting for germination and sapling establishment. Thus, forest regeneration, restoration and nature conservation practices aiming at increasing forests resilience in Mediterranean dryland climates should account for the importance of microclimate in defining the niche of seedlings and of adult trees.
英文关键词	Niche width Tree regeneration Forest regeneration Topography Forest Semi-arid
类型	Article
语种	英语
国家	Portugal ; Cyprus
收录类别	SCI-E
WOS记录号	WOS:000490577900043
WOS关键词	POTENTIAL SOLAR-RADIATION ; QUERCUS-ILEX FORESTS ; FUNCTIONAL TRAITS ; LICHEN DIVERSITY ; DROUGHT ; REGENERATION ; CLIMATE ; REFLECTANCE ; COMMUNITIES ; PERFORMANCE
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310660
作者单位	1.Univ Lisbon, Fac Ciencias, Ctr Ecol Evolut & Environm Changes, cE3c FCUL, P-1749016 Lisbon, Portugal; 2.KES Res Ctr, CY-1055 Nicosia, Cyprus; 3.Univ Cyprus, Dept Biol Sci, CY-1678 Nicosia, Cyprus; 4.Open Univ Cyprus, Fac Pure & Appl Sci, Nicosia, Cyprus; 5.ICNF, Ave Reptibl,8 16 A 16B, P-1050191 Lisbon, Portugal
推荐引用方式 GB/T 7714	Principe, Adriana,Matos, Paula,Sarris, Dimitrios,et al. In Mediterranean drylands microclimate affects more tree seedlings than adult trees[J],2019,106.
APA	Principe, Adriana.,Matos, Paula.,Sarris, Dimitrios.,Gaiola, Giulia.,do Rosario, Lacio.,...&Branquinho, Cristina.(2019).In Mediterranean drylands microclimate affects more tree seedlings than adult trees.ECOLOGICAL INDICATORS,106.
MLA	Principe, Adriana,et al."In Mediterranean drylands microclimate affects more tree seedlings than adult trees".ECOLOGICAL INDICATORS 106(2019).