干旱区生态环境知识资源中心(Arid): The use of vascular plant densities to estimate the age of undated lava flows in semi-arid areas of Fogo Island (Cape Verde, Atlantic Ocean)

Arid

DOI	10.1016/j.jaridenv.2019.104042
	The use of vascular plant densities to estimate the age of undated lava flows in semi-arid areas of Fogo Island (Cape Verde, Atlantic Ocean)
	Larrue, Sebastien 1; Paris, Raphael 2; Etienne, Samuel 3
通讯作者	Larrue, Sebastien
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2020
卷号	173
英文摘要	The age of some lava flows on the east-north-east coast of Fogo Island (Cape Verde) remains debated or unknown due to the inapplicability of conventional dating methods. Dating information is important for a retrospective approach to volcanic hazard evaluation and prevention. Historical lavas represent an opportunity to study plant succession within a well-constrained chronological framework, and lava flow age has often been used as a variable to explain plant densities and species composition. Here, vascular plant densities were also assigned as variables to explain lava ages. We surveyed 44 plots on eleven semi-arid lavas among which nine represented a chronosequence of 60- c. 350-yr-old lavas, while two other lavas remained undated. We used principal component analysis (PCA) to test the relationships between species densities and lava ages. A stepwise regression model was then used to identify which species were more closely related to the age of lavas, and the best fit of the model was employed to predict the age of the undated lavas. Spearman' test was used to observe the correlations among lavas and the result was compared with regression model age-predictions for the undated lavas. Among 27 vascular plants, nine species were significantly linked with lava ages. The stepwise model showed that lava ages were significantly explained by the densities of Sarcostemma daltonii and Lantana camara species. Stepwise model age-predictions were congruent with Spearman' results, supporting the proposition that vascular plant species densities can provide useful information about the relative age of undated lava flows in arid environments.
英文关键词	Semi-arid lava flows Vascular plants Chronosequence Volcanic island Island biogeography
类型	Article
语种	英语
国家	France
收录类别	SCI-E
WOS记录号	WOS:000498317600012
WOS关键词	ECOSYSTEM DEVELOPMENT ; COLONIZATION
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2020-02-01
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312791
作者单位	1.UCA, GEOLAB CNRS, F-63057 Clermont Ferrand, France; 2.Univ Clermont Auvergne, Lab Magmas & Volcans, OPGC, CNRS,IRD, 6 Ave Blaise Pascal, F-63178 Aubiere, France; 3.PSL Univ, LETG, CNRS, EPHE, Dinard, France
推荐引用方式 GB/T 7714	Larrue, Sebastien,Paris, Raphael,Etienne, Samuel. The use of vascular plant densities to estimate the age of undated lava flows in semi-arid areas of Fogo Island (Cape Verde, Atlantic Ocean)[J]. French National Research Institute for Sustainable Development,2020,173.
APA	Larrue, Sebastien,Paris, Raphael,&Etienne, Samuel.(2020).The use of vascular plant densities to estimate the age of undated lava flows in semi-arid areas of Fogo Island (Cape Verde, Atlantic Ocean).JOURNAL OF ARID ENVIRONMENTS,173.
MLA	Larrue, Sebastien,et al."The use of vascular plant densities to estimate the age of undated lava flows in semi-arid areas of Fogo Island (Cape Verde, Atlantic Ocean)".JOURNAL OF ARID ENVIRONMENTS 173(2020).