干旱区生态环境知识资源中心(Arid): Functional similarity and dissimilarity facilitate alien plant invasiveness along biotic and abiotic gradients in an arid protected area

Arid

DOI	10.1007/s10530-020-02235-3
	Functional similarity and dissimilarity facilitate alien plant invasiveness along biotic and abiotic gradients in an arid protected area
	El-Barougy, Reham F.1,2; Elgamal, Ibrahim 3; Rohr, Rudolf P.2; Probert, Anna F.2; Khedr, Abdel-hamid A.1; Bacher, Sven 2
通讯作者	El-Barougy, Reham F.
来源期刊	BIOLOGICAL INVASIONS
ISSN	1387-3547
EISSN	1573-1464
出版年	2020
卷号	22 期号:6 页码:1997-2016
英文摘要	Two contradictory hypotheses have been put forth to forecast alien invasiveness: being either functionally similar, or dissimilar, to resident natives along environmental gradients. The 'try-harder' hypothesis predicts that alien plants will be functionally dissimilar to natives and should thus exhibit exaggerated trait values when compared to natives in respect to resource extraction or stress tolerance. In contrast, the 'join-the-locals' hypothesis, which is compatible with environmental filtering, predicts functional similarities among alien and native species in richer, but not in resource-limited environments. Here, we propose a framework that links the successful alien plant strategy, i.e. being functionally similar or dissimilar to natives, to the harshness of the environment and the availability of resources. We tested these two hypotheses using a trait-environment dataset of 33 alien and 130 native plants in 96 sites covering a gradient of soil resources (organic matter, nitrogen, soil moisture) in Saint-Katherine, an arid protected area in Egypt. We estimated 18 interaction coefficients between three candidate traits (specific leaf area, above-ground biomass, height) of alien and native plants as well as soil resources using linear mixed-effects models. Additionally, we calculated the mean and the hierarchical functional distance among aliens and natives along soil gradients. Our results revealed that in extreme resource-limited environments, aliens and natives were functionally similar and had relatively equal trait values consistent with environmental filtering, thus supporting the 'join-the-locals' hypothesis. However, in environments richer in resources, aliens and natives were functionally dissimilar with aliens exhibiting more exploitative trait values (taller, higher SLA and biomass) than natives, providing support for the 'try-harder' hypothesis. While demonstrated in only one arid system, results suggest that linking soil resource availability with functional divergence and convergence among native and alien plants could be used as an informative strategy to predict alien invasiveness. Hence, future studies should investigate the functional response of alien and native plants in different environments against different resource gradients to test for the generality of the patterns we found.
英文关键词	Functional traits Competition Environmental filtering Soil gradients
类型	Article
语种	英语
国家	Egypt ; Switzerland
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000518300000001
WOS关键词	DARWINS NATURALIZATION HYPOTHESIS ; NITROGEN-USE EFFICIENCY ; TRAIT DIFFERENCES ; PHYLOGENETIC STRUCTURE ; ESTABLISHMENT SUCCESS ; RESOURCE AVAILABILITY ; COMPETITIVE ABILITY ; MINERAL-NUTRITION ; INVASION SUCCESS ; CELL-WALLS
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314184
作者单位	1.Damietta Univ, Fac Sci, Dept Bot & Microbiol, New Damietta, Egypt; 2.Univ Fribourg, Dept Biol, Ave Europe 20, CH-1700 Fribourg, Switzerland; 3.Egyptian Environm Affairs Agcy, Nat Conservat Sect, Cairo 11728, Egypt
推荐引用方式 GB/T 7714	El-Barougy, Reham F.,Elgamal, Ibrahim,Rohr, Rudolf P.,et al. Functional similarity and dissimilarity facilitate alien plant invasiveness along biotic and abiotic gradients in an arid protected area[J],2020,22(6):1997-2016.
APA	El-Barougy, Reham F.,Elgamal, Ibrahim,Rohr, Rudolf P.,Probert, Anna F.,Khedr, Abdel-hamid A.,&Bacher, Sven.(2020).Functional similarity and dissimilarity facilitate alien plant invasiveness along biotic and abiotic gradients in an arid protected area.BIOLOGICAL INVASIONS,22(6),1997-2016.
MLA	El-Barougy, Reham F.,et al."Functional similarity and dissimilarity facilitate alien plant invasiveness along biotic and abiotic gradients in an arid protected area".BIOLOGICAL INVASIONS 22.6(2020):1997-2016.