Using statistical phylogeography to infer population history: Case studies on Pimelia darkling beetles from the Canary Islands

Moya, Óscar; Contreras‐Díaz, Hermans G.; Oromı́, Pedro; Juan, Carlos

doi:10.1016/j.jaridenv.2006.01.008

Cited by 9 publications

(4 citation statements)

References 49 publications

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“…We therefore preferred to use the complete original data sets for our analyses, even if there are sometimes multiple individuals per species such as in the most phylogeography‐oriented studies (e.g. Moya et al. , 2006).…”

Section: Methodsmentioning

confidence: 99%

Inferring dispersal: a Bayesian approach to phylogeny‐based island biogeography, with special reference to the Canary Islands

Sanmartín

Mark

Ronquist

2008

Journal of Biogeography

213

219

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Aim Oceanic islands represent a special challenge to historical biogeographers because dispersal is typically the dominant process while most existing methods are based on vicariance. Here, we describe a new Bayesian approach to island biogeography that estimates island carrying capacities and dispersal rates based on simple Markov models of biogeographical processes. This is done in the context of simultaneous analysis of phylogenetic and distributional data across groups, accommodating phylogenetic uncertainty and making parameter estimates more robust. We test our models on an empirical data set of published phylogenies of Canary Island organisms to examine overall dispersal rates and correlation of rates with explanatory factors such as geographic proximity and area size.Location Oceanic archipelagos with special reference to the Atlantic Canary Islands.Methods The Canary Islands were divided into three island-groups, corresponding to the main magmatism periods in the formation of the archipelago, while non-Canarian distributions were grouped into a fourth 'mainland-island'. Dispersal between island groups, which were assumed constant through time, was modelled as a homogeneous, time-reversible Markov process, analogous to the standard models of DNA evolution. The stationary state frequencies in these models reflect the relative carrying capacity of the islands, while the exchangeability (rate) parameters reflect the relative dispersal rates between islands. We examined models of increasing complexity: Jukes-Cantor (JC), Equal-in, and General Time Reversible (GTR), with or without the assumption of stepping-stone dispersal. The data consisted of 13 Canarian phylogenies: 954 individuals representing 393 taxonomic (morphological) entities. Each group was allowed to evolve under its own DNA model, with the island-model shared across groups. Posterior distributions on island model parameters were estimated using Markov Chain Monte Carlo (MCMC) sampling, as implemented in MrBayes 4.0, and Bayes Factors were used to compare models.Results The Equal-in step, the GTR, and the GTR step dispersal models showed the best fit to the data. In the Equal-in and GTR models, the largest carrying capacity was estimated for the mainland, followed by the central islands and the western islands, with the eastern islands having the smallest carrying capacity. The relative dispersal rate was highest between the central and eastern islands, and between the central and western islands. The exchange with the mainland was rare in comparison. INTRODUCT IONAfter being relegated to a simple 'footnote acknowledgment' (Lynch, 1989) in biogeographical papers for a long time, dispersal is again receiving increased attention as a fundamental process explaining the distribution of organisms (de Queiroz, 2005;McGlone, 2005;Riddle, 2005;Cowie & Holland, 2006). This trend can be observed in the large number of phylogeny-oriented articles published since 2004 in this journal and in Systematic Biology with the word 'dispersal' in their abst...

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Section: Methodsmentioning

confidence: 99%

Inferring dispersal: a Bayesian approach to phylogeny‐based island biogeography, with special reference to the Canary Islands

Sanmartín

Mark

Ronquist

2008

Journal of Biogeography

213

219

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“…The relative old age of the archipelago, its island fragmentation and ecological diversity have originated a rich local fauna with a total of 5260 insect species, 2220 of them endemic (Oromí & Báez, 2005). This interesting framework has promoted abundant phylogenetic and phylogeographic studies of some groups of insects and other arthropods (see Brunton & Hurst, 1998;Juan et al, 1995Juan et al, , 1998Juan et al, , 2000Arnedo et al, 2001;Rees et al, 2001;Contreras et al, 2003;Moya et al, 2004Moya et al, , 2006Emerson & Oromí, 2005;Emerson et al, 2006 and references therein; Ló pez et al, in press), leading to one of the largest numbers *Fax: +34 922 318311 E-mail: herilope@ull.es of evolutionary studies to be carried out in an oceanic island archipelago. However, there is a paucity of ecological studies, despite the great interest of this particular fauna.…”

Section: Introductionmentioning

confidence: 99%

Habitat use and phenology of the large insular endemic grasshopperAcrostira euphorbiae(Orthoptera: Pamphagidae)

López

Nogales

Morales

et al. 2007

Bull. Entomol. Res.

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The habitat use and the phenology of the large grasshopper Acrostira euphorbiae García and Oromí endemic to La Palma (Canary Islands) are studied. This grasshopper is entirely dependent on the Canarian endemic shrub Euphorbia lamarckii both for food and to avoid predation. Adults stay on subapical branches during the day, probably to reduce the risk of predation, and climb up to the apex at night to feed. While females seem to ensure the genetic diversity of offspring by waiting for visits by different males, the latter have to move to guarantee their reproductive success. Monophagy in this species may be related to the year-round presence of tender shoots, and to the predator-repellent toxic latex found in the host plant. Unlike related species from continental areas, adults and nymphs of A. euphorbiae are present almost all year round, probably in adaptation to the particular climate of the islands. Nymphs are more abundant in winter, when Euphorbia leaves are most available. However, adults are more abundant than nymphs in spring, summer and autumn. Males develop more quickly than females, an apparent reproductive strategy based on achieving sexual maturity to coincide with females undergoing imaginal moulting. Matings start immediately after adult females emerge. Densities oscillated between 73 and 193 individuals ha(-1), which can be considered a low value compared with other continental pamphagid species.

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“…Despite the Canarian Pimelia being a useful model for studies in evolutionary ecology, most publications so far deal with their systematics and taxonomy [31][32][33][34] or phylogenetic relationships [35][36][37][38]. Only a few studies have examined Pimelia species distributed in narrow altitudinal bands, to assess their plastic or evolutionary responses to specific local environmental conditions [39][40][41], but not over wide altitudinal gradients.…”

Section: Introductionmentioning

confidence: 99%

Interpopulation Plasticity in a Darkling Beetle Life-History along a Whole Oceanic Island Altitudinal Gradient

López

Hervías‐Parejo

Morales

et al. 2021

Insects

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Insects show remarkable phenotypic plasticity in response to changing environmental conditions. The abiotic factors that determine their phenotypes often vary in time and space, and oceanic islands harbour ideal environments for testing predictions on this matter. The ubiquitous beetle Pimelia laevigata costipennis Wollaston, 1864 (Tenebrionidae) is distributed over the entire altitudinal gradient of the island El Hierro (Canary archipelago), from 0 to 1501 m above sea level. Here, we examine how environmental factors (i.e., rainfall and temperature), associated with the altitudinal gradient, affect the body size, reproductive phenology, clutch size and egg volume, and population dynamics of this ectothermic flightless insect. Pimelia l. costipennis populations inhabiting upland localities, typified by lower temperatures, and greater precipitation and vegetation cover, were larger in body size and laid larger clutches with smaller eggs than those in the lowlands. Moreover, reproduction occurred earlier in the year at lower sites and later at higher sites, whereas activity density was highest in the uplands where it increases with temperature. This study first explores the changes in life history patterns along a whole insular altitudinal gradient, and finds interpopulation plasticity. It confirms that environmental factors associated with species spatial distribution act additively as drivers of phenological and phenotypic expression.

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Using statistical phylogeography to infer population history: Case studies on Pimelia darkling beetles from the Canary Islands

Cited by 9 publications

References 49 publications

Inferring dispersal: a Bayesian approach to phylogeny‐based island biogeography, with special reference to the Canary Islands

Inferring dispersal: a Bayesian approach to phylogeny‐based island biogeography, with special reference to the Canary Islands

Habitat use and phenology of the large insular endemic grasshopperAcrostira euphorbiae(Orthoptera: Pamphagidae)

Interpopulation Plasticity in a Darkling Beetle Life-History along a Whole Oceanic Island Altitudinal Gradient

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