New data on the distribution and conservation status of some angiosperms of the Cape Verde Islands, W Africa

Gómes, Isildo; Leyens, Teresa; Luz, Berenice Da; Costa, J. Cruz; Gonçalves, Fátima

doi:10.3372/wi.29.2909

Cited by 5 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the Cape Verde Islands, sampling was restricted to the two islands that have sufficiently large populations ( N > 30 individuals), i.e. Santo Antão and Fogo (Gomes, Leyens, Luz, da Costa, & Gonçalves, ), from which three populations were included in the study.…”

Section: Methodsmentioning

confidence: 99%

The loss of dispersal on islands hypothesis revisited: Implementing phylogeography to investigate evolution of dispersal traits in Periploca (Apocynaceae)

García‐Verdugo¹,

Mairal

Monroy³

et al. 2017

Journal of Biogeography

View full text Add to dashboard Cite

Aim: The loss of dispersal on islands hypothesis (LDIH) posits that wind-dispersed plants should exhibit reduced dispersal potential, particularly if island populations are old. In this study, we tested this hypothesis using a detailed phylogeographical framework across different geographical scales. Location: Mainland and island areas of the Atlantic and Mediterranean regions, including Macaronesia (Canary Islands and Cape Verde) and Mediterranean islands in the strait of Sicily. Methods: Forty-five populations of Periploca laevigata, a wind-dispersed shrub, were sampled. Plastid and nuclear microsatellite data were used to reconstruct spatiotemporal patterns of island colonization, and estimates of seed terminal velocity used as a surrogate for dispersal ability under both field and common garden conditions.Results: Our findings did not provide evidence of loss of dispersability in any island lineage. In all of the regions considered, dispersal ability was similar on island and mainland populations, or higher on islands. Contrary to LDIH expectations, lineages inferred as the oldest (western Canaries and Cape Verde) converged towards the most dispersive seed phenotype. This pattern was supported by data obtained under common garden conditions. Within the western Canarian lineage, successful dispersal was shown to be very rare among islands and extensive within islands, but dispersability did not vary significantly from older to more recent sublineages. Considering all the study islands, we found a strong, positive correlation between dispersal ability and estimates of within-island habitat availability. Main conclusions:This study suggests that dispersal ability can be favoured on islands, possibly because traits enhancing wind dispersal are positively selected when habitat availability is high. Our results challenge broad generalizations of the LDIH, but we discuss how overlooking species 0 phylogeographical history may give rise to misleading conclusions. K E Y W O R D S anemochory, dispersal ability, island colonization, Macaronesia, parallel evolution, seed dispersal

show abstract

Section: Methodsmentioning

confidence: 99%

The loss of dispersal on islands hypothesis revisited: Implementing phylogeography to investigate evolution of dispersal traits in Periploca (Apocynaceae)

García‐Verdugo¹,

Mairal

Monroy³

et al. 2017

Journal of Biogeography

View full text Add to dashboard Cite

show abstract

“…The Xora of the Cape Verde Islands was mainly compiled from Hansen and Sunding (1993), Rustan and Brochmann (1993), Brochmann et al (1997), Lobin et al (1998), Duarte et al (1999Duarte et al ( , 2002, and Gomes et al (1995Gomes et al ( , 1999, and from the published fascicles 1 C of the Flora de Cabo Verde (Paiva et al 1995(Paiva et al -1996Martins et al 2002). As in most similar studies, total Xora included both spontaneous and naturalized taxa.…”

Section: Vascular Xoramentioning

confidence: 99%

Plant species richness in the Cape Verde Islands—eco-geographical determinants

Duarte

Rego²,

Romeiras

et al. 2007

Biodivers Conserv

View full text Add to dashboard Cite

Plant species richness in the Cape Verde archipelago is examined relative to island eco-geographical factors. Species-area and species-area-habitat relationships are analysed using the classical species-area model and the recently proposed species-choros model. The number of Xoristic zones (used to estimate the choros parameter) provides an adequate estimate of the potential habitat diversity, and the species-choros model achieved a better Wt with both total Xora and endemic species. In addition to area and habitat diversity, longitude also emerges as an important determinant of species diversity, whereas latitude, minimum distance to the nearest island, and total rural population do not display any correlation. As in other insular ecosystems, the species richness (about 140 per 100 km 2 ) is lower than in nearby mainland regions; the proximity to the desert areas of the Sahel can also be seen as related with this low value. The Xoristic heterogeneity in Cape Verde is high, as is usual in island ecosystems. In a comparative analysis of the species richness on the diVerent islands (using -values), Brava stands out as having the highest total Xora species densities, while for endemic Xora Brava and São Nicolau jointly occupy the leading position. The high diversity for both total and endemic species on Santo Antão, São Vicente, São Nicolau, Fogo and Brava reinforces their importance in conservation terms -in the case of most of them, something that is already recognized in the established network of protected areas.

show abstract

“…Sonchus daltonii, a rosette shrub, is a critically endangered species in the island, with only ca. 30 individuals remaining (Gomes et al, 1995(Gomes et al, , 1999. The combined tree shows that S. daltonii represents a highly derived species within the alliance and is closely related to S. hierrensis, S. bornmuelleri, and S. gandogeri, which occur on geologically young islands (i.e, La Palma, El Hierro).…”

Section: Monophyly and Origin Of Dendrosonchus Species In Madeira Andmentioning

confidence: 99%

Chloroplast DNA phylogeny of the woody Sonchus alliance (Asteraceae: Sonchinae) in the Macaronesian Islands

Lee

Kim

Lundy

et al. 2005

American J of Botany

View full text Add to dashboard Cite

Determining accurate phylogenetic relationships among the members of the woody Sonchus alliance presents challenges because of an insufficient level of molecular variation and the convergent evolution of similar morphological traits in island settings. To obtain a better resolved phylogeny and to test the potential role of hybridization and introgression, we sequenced all members of the alliance with multiple populations for the ITS of nrDNA and over 4000 base pairs of coding and noncoding regions of cpDNA. The cpDNA phylogeny is not well resolved in the core members of the alliance (i.e., subg. Dendrosonchus and genus Taeckholmia), but like the ITS tree, it has identified basal lineages of monotypic genera. The cpDNA data set was not significantly different from that of ITS, and subsequent combined analysis provided a better resolved and supported phylogeny within the alliance. The combined ML tree identified the same basal lineages, suggested nonmonophyly of Dendrosonchus and Taeckholmia, and did not support either Boulos' or Aldridge's infrasubgeneric classification system. Assessment of the role of hybridization and introgression was limited due to poor resolution in the cpDNA phylogeny. The combined analysis supports a Gran Canaria origin for the alliance and two subsequent long distance dispersal events to Madeira and Cape Verde islands.

show abstract

New data on the distribution and conservation status of some angiosperms of the Cape Verde Islands, W Africa

Cited by 5 publications

References 2 publications

The loss of dispersal on islands hypothesis revisited: Implementing phylogeography to investigate evolution of dispersal traits in Periploca (Apocynaceae)

The loss of dispersal on islands hypothesis revisited: Implementing phylogeography to investigate evolution of dispersal traits in Periploca (Apocynaceae)

Plant species richness in the Cape Verde Islands—eco-geographical determinants

Chloroplast DNA phylogeny of the woody Sonchus alliance (Asteraceae: Sonchinae) in the Macaronesian Islands

Contact Info

Product

Resources

About