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Diversification and Evolutionary Dynamics in Tropical Montane Regions.

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Title: Diversification and Evolutionary Dynamics in Tropical Montane Regions.
Authors: Salazar, Jhan C.1 (AUTHOR) jhancsalazar@wustl.edu, Algar, Adam C.2 (AUTHOR), Poe, Steven3 (AUTHOR), Losos, Jonathan B.1 (AUTHOR), Velasco, Julián A.4 (AUTHOR) javelasco@atmosfera.unam.mx
Source: Global Ecology & Biogeography. Mar2026, Vol. 35 Issue 3, p1-13. 13p.
Subjects: Lizards, Landscapes, Evolutionary theories, Mountain forests, Genetic speciation, Biodiversity
Geographic Terms: Americas
Abstract: Aim: The evolution of montane species provides critical insights into the drivers of adaptation and diversification. Topographic complexity, a defining feature of many mountainous landscapes, promotes ecological and geographic isolation, often accelerating speciation rates. However, the extent to which topographic complexity directly shapes diversification remains unresolved. Here, we investigate the evolutionary dynamics of Anolis lizards across Neotropical mountain ranges to test two hypotheses: (1) higher elevation environments promote higher speciation rates in species that inhabit them; and (2) greater topographic complexity and climatic stability (i.e., lower past climatic‐change velocity) positively influence speciation rates. Location: The Americas. Time Period: Present. Major Taxa Studied: Anolis lizards. Methods: We gathered topographic complexity and past climatic‐change velocity data for 303 anole species and performed phylogenetic analyses to assess how speciation rates change across mountain ranges in the Americas. Results: We found that topographic complexity and past climatic‐change velocity do not significantly influence speciation rates, diverging from prior studies that link rugged landscapes or past climatic‐change velocity to high diversification rates. Main Conclusions: Our findings challenge assumptions about the direct role of topographic complexity in speciation, highlighting the need to consider multifaceted ecological and biogeographical factors driving evolutionary processes. By disentangling the relative contributions of climatic stability (i.e., lower past climatic‐change velocity) and topographic heterogeneity, this study highlights the complex dynamics shaping biodiversity in tropical mountains and calls for further integrative approaches to understand species diversification in the face of climatic and geological change. [ABSTRACT FROM AUTHOR]
Copyright of Global Ecology & Biogeography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Diversification and Evolutionary Dynamics in Tropical Montane Regions.
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  Data: <searchLink fieldCode="AR" term="%22Salazar%2C+Jhan+C%2E%22">Salazar, Jhan C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jhancsalazar@wustl.edu</i><br /><searchLink fieldCode="AR" term="%22Algar%2C+Adam+C%2E%22">Algar, Adam C.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Poe%2C+Steven%22">Poe, Steven</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Losos%2C+Jonathan+B%2E%22">Losos, Jonathan B.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Velasco%2C+Julián+A%2E%22">Velasco, Julián A.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> javelasco@atmosfera.unam.mx</i>
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  Data: <searchLink fieldCode="JN" term="%22Global+Ecology+%26+Biogeography%22">Global Ecology & Biogeography</searchLink>. Mar2026, Vol. 35 Issue 3, p1-13. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Lizards%22">Lizards</searchLink><br /><searchLink fieldCode="DE" term="%22Landscapes%22">Landscapes</searchLink><br /><searchLink fieldCode="DE" term="%22Evolutionary+theories%22">Evolutionary theories</searchLink><br /><searchLink fieldCode="DE" term="%22Mountain+forests%22">Mountain forests</searchLink><br /><searchLink fieldCode="DE" term="%22Genetic+speciation%22">Genetic speciation</searchLink><br /><searchLink fieldCode="DE" term="%22Biodiversity%22">Biodiversity</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Americas%22">Americas</searchLink>
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  Label: Abstract
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  Data: Aim: The evolution of montane species provides critical insights into the drivers of adaptation and diversification. Topographic complexity, a defining feature of many mountainous landscapes, promotes ecological and geographic isolation, often accelerating speciation rates. However, the extent to which topographic complexity directly shapes diversification remains unresolved. Here, we investigate the evolutionary dynamics of Anolis lizards across Neotropical mountain ranges to test two hypotheses: (1) higher elevation environments promote higher speciation rates in species that inhabit them; and (2) greater topographic complexity and climatic stability (i.e., lower past climatic‐change velocity) positively influence speciation rates. Location: The Americas. Time Period: Present. Major Taxa Studied: Anolis lizards. Methods: We gathered topographic complexity and past climatic‐change velocity data for 303 anole species and performed phylogenetic analyses to assess how speciation rates change across mountain ranges in the Americas. Results: We found that topographic complexity and past climatic‐change velocity do not significantly influence speciation rates, diverging from prior studies that link rugged landscapes or past climatic‐change velocity to high diversification rates. Main Conclusions: Our findings challenge assumptions about the direct role of topographic complexity in speciation, highlighting the need to consider multifaceted ecological and biogeographical factors driving evolutionary processes. By disentangling the relative contributions of climatic stability (i.e., lower past climatic‐change velocity) and topographic heterogeneity, this study highlights the complex dynamics shaping biodiversity in tropical mountains and calls for further integrative approaches to understand species diversification in the face of climatic and geological change. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Global Ecology & Biogeography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/geb.70218
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        Text: English
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        PageCount: 13
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    Subjects:
      – SubjectFull: Lizards
        Type: general
      – SubjectFull: Landscapes
        Type: general
      – SubjectFull: Evolutionary theories
        Type: general
      – SubjectFull: Mountain forests
        Type: general
      – SubjectFull: Genetic speciation
        Type: general
      – SubjectFull: Biodiversity
        Type: general
      – SubjectFull: Americas
        Type: general
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      – TitleFull: Diversification and Evolutionary Dynamics in Tropical Montane Regions.
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            NameFull: Salazar, Jhan C.
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            NameFull: Algar, Adam C.
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            NameFull: Poe, Steven
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            NameFull: Losos, Jonathan B.
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              Text: Mar2026
              Type: published
              Y: 2026
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