干旱区生态环境知识资源中心(Arid): Assembly rules in a resource gradient: Competition and abiotic filtering determine the structuring of plant communities in stressful environments

Arid

DOI	10.1371/journal.pone.0230097
	Assembly rules in a resource gradient: Competition and abiotic filtering determine the structuring of plant communities in stressful environments
	Menezes, Bruno Sousa 1; Martins, Fernando Roberto 2; Dantas Carvalho, Ellen Cristina 1; Souza, Bruno Cruz 1; Silveira, Andrea Pereira 3; Bezerra Loiola, Maria Iracema 1; Araujo, Francisca Soares 1
通讯作者	Menezes, Bruno Sousa ; Araujo, Francisca Soares
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2020
卷号	15 期号:3
英文摘要	The relative importance of different community assembly mechanisms varies depending on the environment. According to the stress-dominance hypothesis (SDH), assembly mechanisms range from strong abiotic filtering to competition as the environment becomes more favourable. Most evidence for the SDH comes from studies in gradients of conditions (i.e. abiotic environmental factors that influence the functioning of organisms but are not consumed by them). However, we hypothesized that in resource gradients, competition increases as abiotic filtering becomes stronger. To test our hypothesis, we set up eight plots at different sites along an abiotic severity gradient in the Brazilian semi-arid region (BSAR). In each plot, we identified and measured each woody plant species found, and we recorded 11 functional traits of the main species, dividing the traits into alpha (competition effects) and beta (abiotic filtering effects). We investigated the presence of phylogenetic signal in the traits, the community phylogenetic and phenotypic patterns, and associated the variation in these patterns with the availability of water and soil nutrients. We found phylogenetic signal for most (91%) of the traits analysed. The phylogenetic patterns varied from clustered in stressful sites to random or overdispersed in favourable sites, and we concluded that these phylogenetic patterns were the result of historical processes influencing community assembly in different environments in the BSAR. In general, the phenotypic patterns varied from clustered at the most stressful end to random at less stressful sites. Our results show that in resource gradients, any restriction of the resource (hydric or edaphic) intensifies abiotic filtering and, at the same time, increases the competitive hierarchy among species. On the other hand, stochastic processes seem to have a stronger influence under more favourable abiotic conditions, where abiotic filtering and competition are weaker. Thus, we conclude that the SDH is not supported in resource gradients.
类型	Article
语种	英语
国家	Brazil
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000535290100019
WOS关键词	PHYLOGENETIC DIVERSITY ; SPECIES RICHNESS ; NULL MODELS ; TREE ; PATTERNS ; TRAIT ; CLASSIFICATION ; EVOLUTION ; BIODIVERSITY ; LEGUMINOSAE
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318894
作者单位	1.Fed Univ Ceara UFC, Sci Ctr, Dept Biol, Fortaleza, CE, Brazil; 2.Univ Campinas UNICAMP, Inst Biol, Dept Plant Biol, Campinas, SP, Brazil; 3.Ceara State Univ UECE, Itapipoca Fac Educ, Itapipoca, CE, Brazil
推荐引用方式 GB/T 7714	Menezes, Bruno Sousa,Martins, Fernando Roberto,Dantas Carvalho, Ellen Cristina,et al. Assembly rules in a resource gradient: Competition and abiotic filtering determine the structuring of plant communities in stressful environments[J],2020,15(3).
APA	Menezes, Bruno Sousa.,Martins, Fernando Roberto.,Dantas Carvalho, Ellen Cristina.,Souza, Bruno Cruz.,Silveira, Andrea Pereira.,...&Araujo, Francisca Soares.(2020).Assembly rules in a resource gradient: Competition and abiotic filtering determine the structuring of plant communities in stressful environments.PLOS ONE,15(3).
MLA	Menezes, Bruno Sousa,et al."Assembly rules in a resource gradient: Competition and abiotic filtering determine the structuring of plant communities in stressful environments".PLOS ONE 15.3(2020).