干旱区生态环境知识资源中心(Arid): Habitat-islands in the coastal Atacama Desert: loss of functional redundancy, but not of functional diversity, with decreased precipitation

Arid

DOI	10.1093/aob/mcaa206
	Habitat-islands in the coastal Atacama Desert: loss of functional redundancy, but not of functional diversity, with decreased precipitation
	Stotz, Gisela C.; Salgado-Luarte, Cristian; Vigil, Alonso T.; De la Cruz, Henry J.; Pasten-Marambio, Victor; Gianoli, Ernesto
通讯作者	Stotz, GC (corresponding author), Univ La Serena, Dept Biol, Casilla 554, La Serena, Chile.
来源期刊	ANNALS OF BOTANY
ISSN	0305-7364
EISSN	1095-8290
出版年	2021
卷号	127 期号:5 页码:669-680
英文摘要	Background and Aims Aridity is increasing in many regions of the world, but microclimatic conditions may buffer plant communities from the direct effects of decreased precipitation, creating habitat islands. However, reduced precipitation can also impact these communities indirectly by decreasing the suitability of the surrounding habitat, thus limiting incoming propagules and increasing the chances of population decline and species loss. We test whether decreased precipitation results in loss of species and functional diversity within habitat islands, evaluating in particular whether declines in species diversity and abundance are less likely to result in loss of functional diversity if species/individual loss is stochastic (i.e. independent of species/individual traits) and communities/populations are functionally redundant. Methods Lomas communities are discrete plant communities embedded in the Atacama Desert, maintained by the microclimatic conditions created by fog. We recorded species and functional diversity in six Lomas communities along a 500 km long precipitation gradient in northern Chile. Functional traits were measured in 20 individuals per species, in those species that accounted for approx. 75 % of the abundance at each site. We calculated functional diversity and functional redundancy of the community, and intraspecific functional variation. Key Results Decreased precipitation was associated with lower species diversity and lower species abundances. However, no traits or functional strategies increased or decreased consistently with precipitation, suggesting stochastic species/individual loss. Species with stress-tolerant strategies were predominant in all sites. Although species diversity decreased with decreasing precipitation, functional diversity remained unchanged. Lower functional redundancy in the drier sites suggests that mainly functionally redundant species were lost. Likewise, intraspecific functional variation was similar among communities, despite the lower species abundance in drier sites. Conclusions Decreased precipitation can impact habitat island communities indirectly by decreasing the suitability of the surrounding habitat. Our results support the idea that a stochastic loss of species/individuals from functionally redundant communities and populations does not result in loss of functional diversity.
英文关键词	Functional redundancy functional diversity precipitation climate change species diversity habitat islands intraspecific functional variation Lomas communities fragmentation functional strategies isolation fog
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000646249100009
WOS关键词	CLIMATE-CHANGE ; TRAIT VARIATION ; PHENOTYPIC PLASTICITY ; SPECIES ABUNDANCE ; PLANT DIVERSITY ; TARAPACA REGION ; DROUGHT ; BIODIVERSITY ; ADAPTATION ; VARIABILITY
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349464
作者单位	[Stotz, Gisela C.; Salgado-Luarte, Cristian; Vigil, Alonso T.; De la Cruz, Henry J.; Pasten-Marambio, Victor; Gianoli, Ernesto] Univ La Serena, Dept Biol, Casilla 554, La Serena, Chile; [Pasten-Marambio, Victor] ONG Ecoterra, La Serena, Chile; [Gianoli, Ernesto] Univ Concepcion, Dept Bot, Casilla 160-C, Concepcion, Chile
推荐引用方式 GB/T 7714	Stotz, Gisela C.,Salgado-Luarte, Cristian,Vigil, Alonso T.,et al. Habitat-islands in the coastal Atacama Desert: loss of functional redundancy, but not of functional diversity, with decreased precipitation[J],2021,127(5):669-680.
APA	Stotz, Gisela C.,Salgado-Luarte, Cristian,Vigil, Alonso T.,De la Cruz, Henry J.,Pasten-Marambio, Victor,&Gianoli, Ernesto.(2021).Habitat-islands in the coastal Atacama Desert: loss of functional redundancy, but not of functional diversity, with decreased precipitation.ANNALS OF BOTANY,127(5),669-680.
MLA	Stotz, Gisela C.,et al."Habitat-islands in the coastal Atacama Desert: loss of functional redundancy, but not of functional diversity, with decreased precipitation".ANNALS OF BOTANY 127.5(2021):669-680.