Diversification mechanisms in the Andean grasshopper genus Orotettix (Orthoptera: Acrididae): Ecological niches and evolutionary history
The Andes harbour an outstanding taxonomic and ecological diversity, for which several mechanisms promoting diversification, including ecological gradients and allopatric speciation, have been cited. The grasshopper genus Orotettix is an informative but challenging group to study diversification mec...
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todo:paper_00244066_v123_n4_p697_Scattolini2023-10-03T14:34:55Z Diversification mechanisms in the Andean grasshopper genus Orotettix (Orthoptera: Acrididae): Ecological niches and evolutionary history Scattolini, M.C. Confalonieri, V. Lira-Noriega, A. Pietrokovsky, S. Cigliano, M.M. Niche conservatism Niche modelling Phylogeny Speciation ecological modeling endemism evolution geographical distribution glacial-interglacial cycle grasshopper niche niche overlap phylogenetics phylogeny Pleistocene relatedness speciation (biology) topography Andes Acrididae Orthoptera The Andes harbour an outstanding taxonomic and ecological diversity, for which several mechanisms promoting diversification, including ecological gradients and allopatric speciation, have been cited. The grasshopper genus Orotettix is an informative but challenging group to study diversification mechanisms because species in the genus are morphologically very similar, have low vagility and display local endemism over a complex topography in the Central Andes. We conducted several tests using ecological niche overlap and predictions of geographical distributions of Orotettix species on a phylogenetic framework to disentangle their speciation patterns. A multilocus molecular phylogeny was generated for Orotettix. Niche similarity tests were performed and the degree of niche overlap was estimated between species. Ecological niche models were generated to assess the realized ecological niche and potential distribution. The phylogenetic signal between the phylogenetic relatedness and niche overlap, and geographical and the environmental distances were analysed. Our findings suggest that speciation was not restricted to a single period and that species origins might have coincided with glacial-interglacial cycles of the Pleistocene. Given that we only found cases of niche conservatism for Orotettix, we infer that allopatric speciation had the primary role in its diversification. No significant phylogenetic signal was found, probably due to an island-like radiation process. © 2018 The Linnean Society of London. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00244066_v123_n4_p697_Scattolini |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Niche conservatism Niche modelling Phylogeny Speciation ecological modeling endemism evolution geographical distribution glacial-interglacial cycle grasshopper niche niche overlap phylogenetics phylogeny Pleistocene relatedness speciation (biology) topography Andes Acrididae Orthoptera |
| spellingShingle |
Niche conservatism Niche modelling Phylogeny Speciation ecological modeling endemism evolution geographical distribution glacial-interglacial cycle grasshopper niche niche overlap phylogenetics phylogeny Pleistocene relatedness speciation (biology) topography Andes Acrididae Orthoptera Scattolini, M.C. Confalonieri, V. Lira-Noriega, A. Pietrokovsky, S. Cigliano, M.M. Diversification mechanisms in the Andean grasshopper genus Orotettix (Orthoptera: Acrididae): Ecological niches and evolutionary history |
| topic_facet |
Niche conservatism Niche modelling Phylogeny Speciation ecological modeling endemism evolution geographical distribution glacial-interglacial cycle grasshopper niche niche overlap phylogenetics phylogeny Pleistocene relatedness speciation (biology) topography Andes Acrididae Orthoptera |
| description |
The Andes harbour an outstanding taxonomic and ecological diversity, for which several mechanisms promoting diversification, including ecological gradients and allopatric speciation, have been cited. The grasshopper genus Orotettix is an informative but challenging group to study diversification mechanisms because species in the genus are morphologically very similar, have low vagility and display local endemism over a complex topography in the Central Andes. We conducted several tests using ecological niche overlap and predictions of geographical distributions of Orotettix species on a phylogenetic framework to disentangle their speciation patterns. A multilocus molecular phylogeny was generated for Orotettix. Niche similarity tests were performed and the degree of niche overlap was estimated between species. Ecological niche models were generated to assess the realized ecological niche and potential distribution. The phylogenetic signal between the phylogenetic relatedness and niche overlap, and geographical and the environmental distances were analysed. Our findings suggest that speciation was not restricted to a single period and that species origins might have coincided with glacial-interglacial cycles of the Pleistocene. Given that we only found cases of niche conservatism for Orotettix, we infer that allopatric speciation had the primary role in its diversification. No significant phylogenetic signal was found, probably due to an island-like radiation process. © 2018 The Linnean Society of London. |
| format |
JOUR |
| author |
Scattolini, M.C. Confalonieri, V. Lira-Noriega, A. Pietrokovsky, S. Cigliano, M.M. |
| author_facet |
Scattolini, M.C. Confalonieri, V. Lira-Noriega, A. Pietrokovsky, S. Cigliano, M.M. |
| author_sort |
Scattolini, M.C. |
| title |
Diversification mechanisms in the Andean grasshopper genus Orotettix (Orthoptera: Acrididae): Ecological niches and evolutionary history |
| title_short |
Diversification mechanisms in the Andean grasshopper genus Orotettix (Orthoptera: Acrididae): Ecological niches and evolutionary history |
| title_full |
Diversification mechanisms in the Andean grasshopper genus Orotettix (Orthoptera: Acrididae): Ecological niches and evolutionary history |
| title_fullStr |
Diversification mechanisms in the Andean grasshopper genus Orotettix (Orthoptera: Acrididae): Ecological niches and evolutionary history |
| title_full_unstemmed |
Diversification mechanisms in the Andean grasshopper genus Orotettix (Orthoptera: Acrididae): Ecological niches and evolutionary history |
| title_sort |
diversification mechanisms in the andean grasshopper genus orotettix (orthoptera: acrididae): ecological niches and evolutionary history |
| url |
http://hdl.handle.net/20.500.12110/paper_00244066_v123_n4_p697_Scattolini |
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