Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Molecular analysis and phylogeography of neotropical amphibiens ; Molekulare Analyse und Phylogeographie neotropischer Amphibien
In this thesis, I comprised molecular and phylogeographic studies of neotropical frogs, presented in three chapters. The first chapter is focused on the molecular and acoustic analysis of the direct developing frog, Ischcnocnema guentheri (Brachycephalidae). This species is thought to have a widespread distribution range in the Brazilian Atlantic Forest (AF). Here I show that I. guentheri actually is a species complex composed of a minimum of six species. Two of these species were assigned to available names: I. guentheri and I henselii. The other four were defined as candidate new species. Their phylogeographical pattern partially agrees with paleo-models for the Atlantic Forest, but also suggests the existence of micro-refugia in less stable areas. I. guentheri sensu stricto, previously considered to be widespread, was found only in its type locality, a reserve within the urban area of Rio de Janeiro city. Until now, neither I. guentheri nor I. henselii has ben considered threatened according to IUCN (International Union for Conservation of Nature). However, my findings suggest, that the status has to be carefully re-evaluated in the next comprehensive update of the Red List of Brazil's amphibians. The second study is about the molecular and biogeographic analysis of Dendropsophus minutus. Studies comprising the entire distribution of species that are assumed to occupy vast continental areas across political borders are rare, because data sampling is handicapped by financial, logistic and political factors. Consequently, taxonomic and phylogeographical studies are often focused on specific regions, whereas the entire range is studied rarely. Such is the case in Dendropsophus minutus, a putatively continentally distributed South American hylid. This species is still considered widespread despite regional morphological and biacustical differences. To analyze the molecular diversity and the phylogeographical pattern throughout the range of the species, I made a collaborative effort bringing together 416 tissue ...
Molecular analysis and phylogeography of neotropical amphibiens ; Molekulare Analyse und Phylogeographie neotropischer Amphibien
In this thesis, I comprised molecular and phylogeographic studies of neotropical frogs, presented in three chapters. The first chapter is focused on the molecular and acoustic analysis of the direct developing frog, Ischcnocnema guentheri (Brachycephalidae). This species is thought to have a widespread distribution range in the Brazilian Atlantic Forest (AF). Here I show that I. guentheri actually is a species complex composed of a minimum of six species. Two of these species were assigned to available names: I. guentheri and I henselii. The other four were defined as candidate new species. Their phylogeographical pattern partially agrees with paleo-models for the Atlantic Forest, but also suggests the existence of micro-refugia in less stable areas. I. guentheri sensu stricto, previously considered to be widespread, was found only in its type locality, a reserve within the urban area of Rio de Janeiro city. Until now, neither I. guentheri nor I. henselii has ben considered threatened according to IUCN (International Union for Conservation of Nature). However, my findings suggest, that the status has to be carefully re-evaluated in the next comprehensive update of the Red List of Brazil's amphibians. The second study is about the molecular and biogeographic analysis of Dendropsophus minutus. Studies comprising the entire distribution of species that are assumed to occupy vast continental areas across political borders are rare, because data sampling is handicapped by financial, logistic and political factors. Consequently, taxonomic and phylogeographical studies are often focused on specific regions, whereas the entire range is studied rarely. Such is the case in Dendropsophus minutus, a putatively continentally distributed South American hylid. This species is still considered widespread despite regional morphological and biacustical differences. To analyze the molecular diversity and the phylogeographical pattern throughout the range of the species, I made a collaborative effort bringing together 416 tissue ...
Molecular analysis and phylogeography of neotropical amphibiens ; Molekulare Analyse und Phylogeographie neotropischer Amphibien
Gehara, Marcelo Coelho Miguel (Autor:in) / Vences, Miguel
25.01.2013
Hochschulschrift
Elektronische Ressource
Englisch
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