RT info:eu-repo/semantics/article
T1 Using taxonomic and phylogenetic evenness to compare diversification in two Island Floras
A1 Domínguez Lozano, Felipe
A1 Price, Jonathan
A1 Otto, Rüdiger
A1 Fernández-Palacios, José María
K1 Canary Islands
K1 Gini coefficient
K1 Hawaii
K1 Island biogeography
K1 Phylogenetic structure
K1 Species richness
AB This study compares the phylogenetic structure in the Canary Islands and Hawaii by means of thedistributions of the species number for plant families (Taxonomic evenness) and lineages (Phylogeneticevenness) across archipelagos and across habitats in both archipelagos using the Gini coefficient. Wethen investigate phylogenies to identify particular habitats contributing to such differences usingTaxonomic distinctness (AvTD) and its variation (VarTD).Our results show that the distribution of species number among Hawaiian lineages is much moreuneven than the Canary Islands. In contrast, Hawaii produces a more even distribution of speciesnumber by family than the Canary Islands. This may be due to the Hawaiian Flora being derived fromconsiderably fewer colonists than the Canarian Flora as a result of its much greater degree of isolation.At the same time, Hawaii is represented by the same number of families as the Canary Islands. This maystem from Hawaii’s flora being derived from a greater range of source areas despite its isolation. Finally,there is much more diversification spread across a larger number of lineages in Hawaii. The higherdegree of Hawaiian diversification may be due to a greater range of habitats, more diverse andphylogenetically distinct floristic sources, and low initial species diversity resulting from extremeisolation.Two Canarian habitats (Rock communities and Thermophilous habitats) and one Hawaiian habitat(Wet communities) contribute to the differences in phylogenetic structure between the twoarchipelagos. These habitats exhibit disproportionate levels of unevenness and may represent centresof diversification. We propose a combination of two habitat properties, high receptivity and lowstability, to explain these results.
YR 2010
FD 2010
LK http://riull.ull.es/xmlui/handle/915/17500
UL http://riull.ull.es/xmlui/handle/915/17500
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DS Repositorio institucional de la Universidad de La Laguna
RD 26-dic-2024