An Updated Account of the Vascular Flora of the Iles Eparses (Southwest Indian Ocean)

Boullet, Vincent; Hivert, Jean; Gigord, Luc D. B.

doi:10.5479/si.0077-5630.614

Cited by 11 publications

(6 citation statements)

References 24 publications

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“…Another issue with island-hopping along close-to-sealevel carbonate platforms is the fact that their shore-lines tend to host scrubby plants (e.g. Boullet et al, 2018;Gibson & Phillipson, 1983) that are unsuited to relaying-on land-bound vertebrates long distances over-water.…”

Section: Ne W G Eolog I C Al and G Eophys Ic Al Datamentioning

confidence: 99%

Colonizing the Caribbean: New geological data and an updated land‐vertebrate colonization record challenge the GAARlandia land‐bridge hypothesis

Ali

2021

Journal of Biogeography

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Over the past three decades, the hypothesized mid‐Cenozoic GAARlandia walkway (34 ± 1 Ma) has featured prominently in discussions on Caribbean biogeography. However, a fundamental issue has been a lack of geological and geophysical data from the Aves Ridge with which to evaluate the proposal. Consequently, opinions have been based purely on biological data, mainly from molecular‐clock studies but also from fossils and taxonomic composition. For whatever reasons, a polarization of views has occurred; some champion the land‐bridge to explain the colonizations of the island group, whereas others prefer over‐water dispersal. We examine the hypothesis drawing upon an updated compilation of land‐vertebrate colonizations (35 clades: 6 amphibian, 6 mammal and 23 reptile) plus a newly published geological study of the Aves Ridge and the adjacent Grenada Basin (to the east). The former indicates that the colonizations were heavily filtered and assembled in a piecemeal fashion consistent with over‐water dispersal; a mid‐Cenozoic ecological corridor would likely have led to a richer assemblage with a wider variety of components. The latter, which draws upon drill‐core and seismic data, indicates that the southern and central Aves Ridge was submerged at the aforesaid time. With the GAARlandia hypothesis geologically falsified, many biogeographical scenarios that have been proposed for the Greater Antillean biota now require re‐evaluation.

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Section: Ne W G Eolog I C Al and G Eophys Ic Al Datamentioning

confidence: 99%

Colonizing the Caribbean: New geological data and an updated land‐vertebrate colonization record challenge the GAARlandia land‐bridge hypothesis

Ali

2021

Journal of Biogeography

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“…1). The absence of Ramalina species there could partly be explained by the absence of the most suitable phorophyte species, S. maritima (Boullet et al 2018). However, H. foertherianum constitutes rather vast shrublands in this territory, which was shown from the Glorioso Islands to be a suitable phorophyte for Ramalina species.…”

Section: Resultsmentioning

confidence: 86%

“…Europa Island, Juan de Nova, Glorioso Islands, and Tromelin constitute, along with Bassas da India (an atoll of only 0.2 km², which is merely totally submerged at high tide), the fifth district of the French Southern and Antarctic Lands (TAAF). The emerged surface of these territories is less than 40.4 km² altogether (Boullet et al 2018), and the elevation is very low, as the highest recorded point is 14 m a.s.l. at Glorioso Islands.…”

Section: Introductionmentioning

confidence: 93%

The genus Ramalina (Ascomycota, Lecanoromycetes, Ramalinaceae) from the Scattered Islands (French Southern and Antarctic Lands), with descriptions of three new species

Poncet¹,

Dévéhat²,

Ferron³

et al. 2021

PFS

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A systematic survey of lichens was performed in 2019 in four of the five territories constituting the French Scattered Islands (Europa Island, Juan de Nova, Glorioso Islands, and Tromelin) focusing on the genus Ramalina. Species were characterized using morphological (macroscopic and microscopic) features and an accurate chemical profiling method based on high-performance liquid chromatography coupled with diode-array detection and electrospray ionization tandem mass spectrometry (HPLC-DAD-MS). Five species were found in these territories. Two of them, Ramalina dumeticola and R. ovalis, are already known. Three species are introduced here as new to science: Ramalina gloriosensis sp. nov., R. hivertiana sp. nov., and R. marteaui sp. nov. An identification key is provided for the species found in the area and morphologically closely related taxa.

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“…km for the very isolated and uninhabited atoll of Maria (150 ha) in the Austral Islands (Meyer, 2013) but with 25 and 24 native species respectively. The floristic diversity of Clipperton is similar to the small (100 ha) island of Tromelin (Iles Eparses, South-West Indian Ocean), an upraised atoll, with 20 plant species including seven native species (Boullet et al, 2018).…”

Section: Description Of the Vegetation In The Different Areasmentioning

confidence: 89%

Flora and Vegetation of Clipperton (La Passion) Atoll, North-Eastern Pacific Ocean: Three Centuries of Changes and Recent Plant Dynamics

Jost

Jöst

Meyer

2019

Atoll Research Bulletin

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The terrestrial flora and vegetation of Clipperton (La Passion) atoll, a very remote and small (170 ha of land) French island located in the North-Eastern Pacific Ocean, at ca. 1,000 km west of the Mexican coast, have dramatically changed during the past three centuries. This paper, based on historical testimonies, previously published floristic studies, and an extensive plant inventory conducted during the “International Scientific Expedition PASSION 2015”, show that the atoll has experienced particularly active and rapid vegetation dynamics with alternating plant cover expansion and regression phases. Our results provide the first comprehensive assessment of vegetation cover and vascular plant species distribution based on georeferenced data and mapped with GIS software, as well as the first record of two newly established non-native weeds. The current composition and abundance of native and alien vascular plant communities (15 species including only 4 native taxa) appear to depend not only on abiotic factors (e.g. substrate and climatic events) but also on biotic interactions with animal communities (e.g. native seabirds and crabs). Anthropogenic activities and disturbances (e.g. coconut palm, pig, rat and weed introductions) that have occurred in the past 100 years have also played an important role in explaining the past and current floristic changes.

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An Updated Account of the Vascular Flora of the Iles Eparses (Southwest Indian Ocean)

Cited by 11 publications

References 24 publications

Colonizing the Caribbean: New geological data and an updated land‐vertebrate colonization record challenge the GAARlandia land‐bridge hypothesis

Colonizing the Caribbean: New geological data and an updated land‐vertebrate colonization record challenge the GAARlandia land‐bridge hypothesis

The genus Ramalina (Ascomycota, Lecanoromycetes, Ramalinaceae) from the Scattered Islands (French Southern and Antarctic Lands), with descriptions of three new species

Flora and Vegetation of Clipperton (La Passion) Atoll, North-Eastern Pacific Ocean: Three Centuries of Changes and Recent Plant Dynamics

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