The succession of ecological divergence and reproductive isolation in adaptive radiations
Pontarp, Mikael LU ; Lundberg, Per LU and Ripa, Jörgen LU
(2024)
In Journal of Theoretical Biology
587.
- Abstract
Adaptive radiation is a major source of biodiversity but the way in which known components of ecological opportunity, ecological differentiation, and reproductive isolation underpin such biodiversity patterns remains elusive. Much is known about the evolution of ecological differentiation and reproductive isolation during single speciation events, but exactly how those processes scale up to complete adaptive radiations is less understood. Do we expect complete reproductive barriers between newly formed species before the ecological differentiation continues, or does proper species formation occur much later, long after the ecological diversification? Our goal is to improve our mechanistic understanding of adaptive radiations by... (More)
Adaptive radiation is a major source of biodiversity but the way in which known components of ecological opportunity, ecological differentiation, and reproductive isolation underpin such biodiversity patterns remains elusive. Much is known about the evolution of ecological differentiation and reproductive isolation during single speciation events, but exactly how those processes scale up to complete adaptive radiations is less understood. Do we expect complete reproductive barriers between newly formed species before the ecological differentiation continues, or does proper species formation occur much later, long after the ecological diversification? Our goal is to improve our mechanistic understanding of adaptive radiations by analyzing an individual-based model that includes a suite of mechanisms that are known to contribute to biodiversity. The model includes variable biogeographic settings, ecological opportunities, and types of mate choice, which makes several different scenarios of an adaptive radiation possible. We find that evolving clades tend to exploit ecological opportunities early whereas reproductive barriers evolve later, demonstrating a decoupling of ecological differentiation and species formation. In many cases, we also find a long-term trend where assortative mating associated with ecological traits is replaced by sexual selection of neutral display traits as the primary mechanism for reproductive isolation. Our results propose that reticulate phylogenies are likely common and stem from initially low reproductive barriers, rather than the previously suggested idea of repeated hybridization events between well-separated species.
(Less)
- author
- Pontarp, Mikael
LU
; Lundberg, Per
LU
and Ripa, Jörgen
LU
- organization
- publishing date
- 2024-06-21
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Adaptive radiation, Ecological diversification, Reproductive isolation, Speciation, Syngameon hypothesis
- in
- Journal of Theoretical Biology
- volume
- 587
- article number
- 111819
- pages
- 11 pages
- publisher
- Academic Press
- external identifiers
-
- scopus:85190323143
- pmid:38589008
- ISSN
- 0022-5193
- DOI
- 10.1016/j.jtbi.2024.111819
- language
- English
- LU publication?
- yes
- id
- 61de9e75-7a33-421a-8a4d-39a973e7b92d
- date added to LUP
- 2024-05-20 13:29:47
- date last changed
- 2024-06-17 15:07:28
@article{61de9e75-7a33-421a-8a4d-39a973e7b92d,
abstract = {{<p>Adaptive radiation is a major source of biodiversity but the way in which known components of ecological opportunity, ecological differentiation, and reproductive isolation underpin such biodiversity patterns remains elusive. Much is known about the evolution of ecological differentiation and reproductive isolation during single speciation events, but exactly how those processes scale up to complete adaptive radiations is less understood. Do we expect complete reproductive barriers between newly formed species before the ecological differentiation continues, or does proper species formation occur much later, long after the ecological diversification? Our goal is to improve our mechanistic understanding of adaptive radiations by analyzing an individual-based model that includes a suite of mechanisms that are known to contribute to biodiversity. The model includes variable biogeographic settings, ecological opportunities, and types of mate choice, which makes several different scenarios of an adaptive radiation possible. We find that evolving clades tend to exploit ecological opportunities early whereas reproductive barriers evolve later, demonstrating a decoupling of ecological differentiation and species formation. In many cases, we also find a long-term trend where assortative mating associated with ecological traits is replaced by sexual selection of neutral display traits as the primary mechanism for reproductive isolation. Our results propose that reticulate phylogenies are likely common and stem from initially low reproductive barriers, rather than the previously suggested idea of repeated hybridization events between well-separated species.</p>}},
author = {{Pontarp, Mikael and Lundberg, Per and Ripa, Jörgen}},
issn = {{0022-5193}},
keywords = {{Adaptive radiation; Ecological diversification; Reproductive isolation; Speciation; Syngameon hypothesis}},
language = {{eng}},
month = {{06}},
publisher = {{Academic Press}},
series = {{Journal of Theoretical Biology}},
title = {{The succession of ecological divergence and reproductive isolation in adaptive radiations}},
url = {{http://dx.doi.org/10.1016/j.jtbi.2024.111819}},
doi = {{10.1016/j.jtbi.2024.111819}},
volume = {{587}},
year = {{2024}},
}