Arid
DOI10.1016/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, Sebastien1; Paris, Raphael2; Etienne, Samuel3
Corresponding AuthorLarrue, Sebastien
JournalJOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
Year Published2020
Volume173
Abstract in English

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.


Keyword in EnglishSemi-arid lava flows Vascular plants Chronosequence Volcanic island Island biogeography
SubtypeArticle
Language英语
CountryFrance
Indexed BySCI-E
WOS IDWOS:000498317600012
WOS KeywordECOSYSTEM DEVELOPMENT ; COLONIZATION
WOS SubjectEcology ; Environmental Sciences
WOS Research AreaEnvironmental Sciences & Ecology
EI Keywords2020-02-01
Document Type期刊论文
Identifierhttp://119.78.100.177/qdio/handle/2XILL650/312791
Affiliation1.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
Recommended Citation
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],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).
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