Digital Repository for Área de Conservación Guanacaste, a World Heritage Place.

The spatial scale of speciation and patterns of diversity

Show simple item record Kisel, Yael 2016-05-09T18:01:06Z 2016-05-09T18:01:06Z 2010-12
dc.identifier.citation Kisel, Yael. (2010). The spatial scale of speciation and patterns of diversity. Imperial College London, Division of Biology. Barcode 2407203023. es_CR
dc.identifier.other Barcode 2407203023
dc.description.abstract Many environmental factors and taxon traits have been studied as potential controllers of diversification, but there is still no consensus as to which are most important or how to link them into a general theory of diversification. I hypothesise that diversification is strongly controlled by the interaction between area and clades’ spatial scales of speciation, or the amount of area they require for speciation to occur. Furthermore, I hypothesise that the spatial scale of speciation is controlled by population genetic characteristics of clades, as speciation is ultimately a process of population divergence. In this thesis, I quantify taxonomic variation in the spatial scale of speciation, test whether it can be explained by variation in population genetics and evaluate whether it can explain taxonomic patterns of diversity. Using a survey of speciation events on isolated oceanic islands, I show that the spatial scale of speciation varies greatly between birds, lizards, snails, bats, carnivorous mammals, lepidoptera, angiosperms and ferns. I also use a meta-analysis of population genetic data collected from the literature to show that the minimum area for speciation of these groups correlate strongly with their average strength of gene flow. I then test the link between population genetics and diversification by comparing population genetic characteristics of sister clades of tropical orchids that differ greatly in species richness. Contrary to expectation, levels of gene flow, genetic drift and local adaptation do not correlate directly with rates of diversification. However, there is some evidence for an interaction between species range size and gene flow in controlling diversification. This thesis supports a framework based on the interaction between the spatial scale of speciation and area as a useful foundation for general theories of diversification. It also highlights the potential for using a comparative population genetics approach in macroevolutionary studies. es_CR
dc.language.iso en_US es_CR
dc.publisher Imperial College London, Division of Biology. es_CR
dc.subject biodiversity es_CR
dc.subject diversification es_CR
dc.subject speciation es_CR
dc.subject spatial scales es_CR
dc.subject taxonomic variation es_CR
dc.subject macroevolution es_CR
dc.subject biodiversidad es_CR
dc.subject diversificación es_CR
dc.subject especiación es_CR
dc.subject escalas espaciales es_CR
dc.subject variación taxonómica es_CR
dc.subject macroevolución es_CR
dc.title The spatial scale of speciation and patterns of diversity es_CR
dc.type Thesis es_CR

Files in this item

This item appears in the following Collection(s)

  • Colección Pública
    Artículos de Acceso Abierto y Manuscritos de Investigadores entregados a ACG

Show simple item record

Search COPA


My Account