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Costa VA, Ronco F, Mifsud JCO, Harvey E, Salzburger W, Holmes EC. Host adaptive radiation is associated with rapid virus diversification and cross-species transmission in African cichlid fishes. Curr Biol 2024; 34:1247-1257.e3. [PMID: 38428417 DOI: 10.1016/j.cub.2024.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 12/18/2023] [Accepted: 02/06/2024] [Indexed: 03/03/2024]
Abstract
Adaptive radiations are generated through a complex interplay of biotic and abiotic factors. Although adaptive radiations have been widely studied in the context of animal and plant evolution, little is known about how they impact the evolution of the viruses that infect these hosts, which in turn may provide insights into the drivers of cross-species transmission and hence disease emergence. We examined how the rapid adaptive radiation of the cichlid fishes of African Lake Tanganyika over the last 10 million years has shaped the diversity and evolution of the viruses they carry. Through metatranscriptomic analysis of 2,242 RNA sequencing libraries, we identified 121 vertebrate-associated viruses among various tissue types that fell into 13 RNA and 4 DNA virus groups. Host-switching was commonplace, particularly within the Astroviridae, Metahepadnavirus, Nackednavirus, Picornaviridae, and Hepacivirus groups, occurring more frequently than in other fish communities. A time-calibrated phylogeny revealed that hepacivirus diversification was not constant throughout the cichlid radiation but accelerated 2-3 million years ago, coinciding with a period of rapid cichlid diversification and niche packing in Lake Tanganyika, thereby providing more closely related hosts for viral infection. These data depict a dynamic virus ecosystem within the cichlids of Lake Tanganyika, characterized by rapid virus diversification and frequent host jumping, and likely reflecting their close phylogenetic relationships that lower the barriers to cross-species virus transmission.
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Affiliation(s)
- Vincenzo A Costa
- Sydney Institute for Infectious Diseases, School of Medical Sciences, The University of Sydney, Sydney, NSW 2006, Australia
| | - Fabrizia Ronco
- Natural History Museum, University of Oslo, 0562 Oslo, Norway
| | - Jonathon C O Mifsud
- Sydney Institute for Infectious Diseases, School of Medical Sciences, The University of Sydney, Sydney, NSW 2006, Australia
| | - Erin Harvey
- Sydney Institute for Infectious Diseases, School of Medical Sciences, The University of Sydney, Sydney, NSW 2006, Australia
| | - Walter Salzburger
- Zoological Institute, Department of Environmental Sciences, University of Basel, Vesalgasse 1, 4051 Basel, Switzerland
| | - Edward C Holmes
- Sydney Institute for Infectious Diseases, School of Medical Sciences, The University of Sydney, Sydney, NSW 2006, Australia.
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2
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Liu J, Zhou SZ, Liu YL, Zhao BY, Yu D, Zhong MC, Jiang XD, Cui WH, Zhao JX, Qiu J, Liu LM, Guo ZH, Li HT, Tan DY, Hu JY, Li DZ. Genomes of Meniocus linifolius and Tetracme quadricornis reveal the ancestral karyotype and genomic features of core Brassicaceae. PLANT COMMUNICATIONS 2024:100878. [PMID: 38475995 DOI: 10.1016/j.xplc.2024.100878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 03/03/2024] [Accepted: 03/11/2024] [Indexed: 03/14/2024]
Abstract
Brassicaceae represents an important plant family from both a scientific and economic perspective. However, genomic features related to the early diversification of this family have not been fully characterized, especially upon the uplift of the Tibetan Plateau, which was followed by increasing aridity in the Asian interior, intensifying monsoons in Eastern Asia, and significantly fluctuating daily temperatures. Here, we reveal the genomic architecture that accompanied early Brassicaceae diversification by analyzing two high-quality chromosome-level genomes for Meniocus linifolius (Arabodae; clade D) and Tetracme quadricornis (Hesperodae; clade E), together with genomes representing all major Brassicaceae clades and the basal Aethionemeae. We reconstructed an ancestral core Brassicaceae karyotype (CBK) containing 9 pseudochromosomes with 65 conserved syntenic genomic blocks and identified 9702 conserved genes in Brassicaceae. We detected pervasive conflicting phylogenomic signals accompanied by widespread ancient hybridization events, which correlate well with the early divergence of core Brassicaceae. We identified a successive Brassicaceae-specific expansion of the class I TREHALOSE-6-PHOSPHATE SYNTHASE 1 (TPS1) gene family, which encodes enzymes with essential regulatory roles in flowering time and embryo development. The TPS1s were mainly randomly amplified, followed by expression divergence. Our results provide fresh insights into historical genomic features coupled with Brassicaceae evolution and offer a potential model for broad-scale studies of adaptive radiation under an ever-changing environment.
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Affiliation(s)
- Jie Liu
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia & Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shi-Zhao Zhou
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia & Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yun-Long Liu
- Germplasm Bank of Wild Species & Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Bin-Yan Zhao
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia & Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dongmei Yu
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia & Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Mi-Cai Zhong
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia & Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Xiao-Dong Jiang
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia & Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Wei-Hua Cui
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia & Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Jiu-Xia Zhao
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia & Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Juan Qiu
- College of Life Sciences, Xinjiang Agricultural University, Ürümqi 830052, China
| | - Liang-Min Liu
- Germplasm Bank of Wild Species & Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen-Hua Guo
- Germplasm Bank of Wild Species & Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Hong-Tao Li
- Germplasm Bank of Wild Species & Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Dun-Yan Tan
- College of Life Sciences, Xinjiang Agricultural University, Ürümqi 830052, China
| | - Jin-Yong Hu
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia & Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
| | - De-Zhu Li
- Germplasm Bank of Wild Species & Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
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3
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Santos AS, Almeida EM, Aecyo P, Costa L, Wanderley A, Batalha-Filho H, Vaio M, Chase MW, Christenhusz MJM, Felix LP, Souza G. Macroevolutionary trends of the Neotropical genus Ameroglossum (Linderniaceae) in rocky outcrop environments. Mol Phylogenet Evol 2023; 189:107929. [PMID: 37726037 DOI: 10.1016/j.ympev.2023.107929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 09/04/2023] [Accepted: 09/14/2023] [Indexed: 09/21/2023]
Abstract
Ameroglossum is a rare plant genus endemic to northeastern of Brazil, initially monospecific (A. pernambucense) and recently expanded by the description of eight new species and two related genera. The genus was initially placed in the family Scrophulariaceae, but this has never been phylogenetically tested. This group is ecologically restricted to rocky inselberg habitats that function as island-like systems (ILS) with spatial fragmentation, limited area, environmental heterogeneity, temporal isolation and low connectivity. Here we use a phylogenetic perspective to test the hypothesis that Ameroglossum diversification was related to island-like radiation in inselbergs. Our results support that Ameroglossum is monophyletic only with the inclusion of Catimbaua and Isabelcristinia (named here as Ameroglossum sensu lato) and this group was well-supported in the family Linderniaceae. Biogeographic analyses suggest that the ancestral of Ameroglossum and related genus arrived in South America c.a. 15 million years ago by long-distance dispersal, given the ancestral distribution of Linderniaceae in Africa. In rocky outcrop habitats, Ameroglossum s.l. developed floral morphological specialization associated with pollinating hummingbirds, compatible with an island-like model. However, no increase in speciation rate was detected, which may be related to high extinction rates and/or slow diversification rate in this ecologically restrictive environment. Altogether, in Ameroglossum key innovations involving flowers seem to have offered opportunities for evolution of greater phenotypic diversity and occupation of new niches in rocky outcrop environments.
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Affiliation(s)
- Amanda S Santos
- Laboratory of Plant Cytogenetics and Evolution, Postgraduate Program Plant Biology, Department of Botany, Federal University of Pernambuco, Recife, Brazil
| | - Erton M Almeida
- Laboratory of Plant Cytogenetics and Evolution, Postgraduate Program Plant Biology, Department of Botany, Federal University of Pernambuco, Recife, Brazil
| | - Paulo Aecyo
- Laboratory of Plant Cytogenetics and Evolution, Postgraduate Program Plant Biology, Department of Botany, Federal University of Pernambuco, Recife, Brazil; Laboratory of Evolutionary Ecology and Genomic of Plants, Postgraduate Program in Plant Biology, Department of Plant Biology, Biology Institute, University of Campinas, São Paulo, Brazil
| | - Lucas Costa
- Laboratory of Plant Cytogenetics and Evolution, Postgraduate Program Plant Biology, Department of Botany, Federal University of Pernambuco, Recife, Brazil
| | - Artur Wanderley
- Laboratory of Plant Cytogenetics and Evolution, Postgraduate Program Plant Biology, Department of Botany, Federal University of Pernambuco, Recife, Brazil
| | - Henrique Batalha-Filho
- Laboratory of Evolution and Biogeography, Institute of Biology, Federal University of Bahia, Salvador, Brazil
| | - Magdalena Vaio
- Laboratory of Plant Genome Evolution and Domestication, Department of Plant Biology, Faculty of Agronomy, University of the Republic, Montevideo, Uruguay
| | - Mark W Chase
- Department of Environment and Agriculture, Curtin University, Perth, Western Australia, Australia, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3DS, United Kingdom
| | - Maarten J M Christenhusz
- Department of Environment and Agriculture, Curtin University, Perth, Western Australia, Australia, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3DS, United Kingdom
| | - Leonardo P Felix
- Laboratory of Plant Cytogenetics and Evolution, Postgraduate Program Plant Biology, Department of Botany, Federal University of Pernambuco, Recife, Brazil; Postgraduate Program Agronomy, Department of Biosciences, Federal University of Paraiba, Areia, Brazil
| | - Gustavo Souza
- Laboratory of Plant Cytogenetics and Evolution, Postgraduate Program Plant Biology, Department of Botany, Federal University of Pernambuco, Recife, Brazil.
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Lescroart J, Bonilla-Sánchez A, Napolitano C, Buitrago-Torres DL, Ramírez-Chaves HE, Pulido-Santacruz P, Murphy WJ, Svardal H, Eizirik E. Extensive Phylogenomic Discordance and the Complex Evolutionary History of the Neotropical Cat Genus Leopardus. Mol Biol Evol 2023; 40:msad255. [PMID: 37987559 PMCID: PMC10701098 DOI: 10.1093/molbev/msad255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/07/2023] [Accepted: 11/13/2023] [Indexed: 11/22/2023] Open
Abstract
Even in the genomics era, the phylogeny of Neotropical small felids comprised in the genus Leopardus remains contentious. We used whole-genome resequencing data to construct a time-calibrated consensus phylogeny of this group, quantify phylogenomic discordance, test for interspecies introgression, and assess patterns of genetic diversity and demographic history. We infer that the Leopardus radiation started in the Early Pliocene as an initial speciation burst, followed by another in its subgenus Oncifelis during the Early Pleistocene. Our findings challenge the long-held notion that ocelot (Leopardus pardalis) and margay (L. wiedii) are sister species and instead indicate that margay is most closely related to the enigmatic Andean cat (L. jacobita), whose whole-genome data are reported here for the first time. In addition, we found that the newly sampled Andean tiger cat (L. tigrinus pardinoides) population from Colombia associates closely with Central American tiger cats (L. tigrinus oncilla). Genealogical discordance was largely attributable to incomplete lineage sorting, yet was augmented by strong gene flow between ocelot and the ancestral branch of Oncifelis, as well as between Geoffroy's cat (L. geoffroyi) and southern tiger cat (L. guttulus). Contrasting demographic trajectories have led to disparate levels of current genomic diversity, with a nearly tenfold difference in heterozygosity between Andean cat and ocelot, spanning the entire range of variability found in extant felids. Our analyses improved our understanding of the speciation history and diversity patterns in this felid radiation, and highlight the benefits to phylogenomic inference of embracing the many heterogeneous signals scattered across the genome.
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Affiliation(s)
- Jonas Lescroart
- Department of Biology, University of Antwerp, Antwerp, Belgium
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Alejandra Bonilla-Sánchez
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
- Faculty of Exact and Natural Sciences, University of Antioquia, Medellín, Colombia
| | - Constanza Napolitano
- Department of Biological Sciences and Biodiversity, University of Los Lagos, Osorno, Chile
- Institute of Ecology and Biodiversity, Concepción, Chile
- Cape Horn International Center, Puerto Williams, Chile
- Andean Cat Alliance, Villa Carlos Paz, Argentina
| | - Diana L Buitrago-Torres
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Héctor E Ramírez-Chaves
- Department of Biological Sciences, University of Caldas, Manizales, Colombia
- Centro de Museos, Museo de Historia Natural, University of Caldas, Manizales, Colombia
| | | | - William J Murphy
- Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, USA
- Interdisciplinary Program in Genetics & Genomics, Texas A&M University, College Station, TX, USA
| | - Hannes Svardal
- Department of Biology, University of Antwerp, Antwerp, Belgium
- Naturalis Biodiversity Center, Leiden, Netherlands
| | - Eduardo Eizirik
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
- Instituto Pró-Carnívoros, Atibaia, Brazil
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5
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Jian J, Yuan Y, Vilatersana R, Li L, Wang Y, Zhang W, Song Z, Kong H, Peter Comes H, Yang J. Phylogenomic and population genomic analyses reveal the spatial-temporal dynamics of diversification of the Nigella arvensis complex (Ranunculaceae) in the Aegean archipelago. Mol Phylogenet Evol 2023; 188:107908. [PMID: 37598984 DOI: 10.1016/j.ympev.2023.107908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/13/2023] [Accepted: 08/17/2023] [Indexed: 08/22/2023]
Abstract
The continental-shelf islands of the Aegean Sea provide an ideal geographical setting for evolutionary-biogeographical studies but disentangling the relationships between palaeogeographical history and the times, orders of modes of taxon divergence is not straightforward. Here, we used phylogenomic and population genomic approaches, based on orthologous gene sequences and transcriptome-derived SNP data, to reconstruct the spatial-temporal evolution of the Aegean Nigella arvensis complex (Ranunculaceae; 11 out of 12 taxa). The group's early diversification in the Early/Mid-Pliocene (c. 3.77 Mya) resulted in three main lineages (Greek mainland vs. central Aegean + Turkish mainland/eastern Aegean islands), while all extant taxa are of Late Plio-/Early Pleistocene origin (c. 3.30-1.59 Mya). Demographic modelling of the outcrossing taxa uncovered disparate modes of (sub)speciation, including divergence with gene flow on the Greek mainland, para- or peripatric diversification across eastern Aegean islands, and a 'mixing-isolation-mixing (MIM)' mode of subspeciation in the Cyclades. The two selfing species (N. stricta, N. doerfleri) evolved independently from the outcrossers. Present-day island configurations are clearly insufficient to explain the spatial-temporal history of lineage diversification and modes of (sub)speciation in Aegean Nigella. Moreover, our identification of positively selected genes in almost all taxa calls into question that this plant group represents a case of 'non-adaptive' radiation. Our study revealed an episodic diversification history of the N. arvensis complex, giving new insight into the modes and drivers of island speciation and adaption across multiple spatiotemporal scales.
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Affiliation(s)
- Jinjing Jian
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Center for Evolutionary Biology, Fudan University, Shanghai 200438, China.
| | - Yi Yuan
- State Key Laboratory of Systematic and Evolutionary Botany, CAS Center for Excellence in Molecular Plant Sciences, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Roser Vilatersana
- Botanic Institute of Barcelona (IBB, CSIC-ICUB), Barcelona 08038, Spain.
| | - Linfeng Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Center for Evolutionary Biology, Fudan University, Shanghai 200438, China.
| | - Yuguo Wang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Center for Evolutionary Biology, Fudan University, Shanghai 200438, China.
| | - Wenju Zhang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Center for Evolutionary Biology, Fudan University, Shanghai 200438, China.
| | - Zhiping Song
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Center for Evolutionary Biology, Fudan University, Shanghai 200438, China.
| | - Hongzhi Kong
- State Key Laboratory of Systematic and Evolutionary Botany, CAS Center for Excellence in Molecular Plant Sciences, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Hans Peter Comes
- Department of Ecology and Evolution, University of Salzburg, Salzburg A5020, Austria.
| | - Ji Yang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Center for Evolutionary Biology, Fudan University, Shanghai 200438, China; Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden, Shanghai 201602, China.
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6
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Bhadra S, Leitch IJ, Onstein RE. From genome size to trait evolution during angiosperm radiation. Trends Genet 2023; 39:728-735. [PMID: 37582671 DOI: 10.1016/j.tig.2023.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 07/21/2023] [Accepted: 07/24/2023] [Indexed: 08/17/2023]
Abstract
Angiosperm diversity arises from trait flexibility and repeated evolutionary radiations, but the role of genomic characters in these radiations remains unclear. In this opinion article, we discuss how genome size can influence angiosperm diversification via its intricate link with cell size, tissue packing, and physiological processes which, in turn, influence the macroevolution of functional traits. We propose that integrating genome size, functional traits, and phylogenetic data across a wide range of lineages allows us to test whether genome size decrease consistently leads to increased trait flexibility, while genome size increase constrains trait evolution. Combining theories from molecular biology, functional ecology and macroevolution, we provide a framework to better understand the role of genome size in trait evolution, evolutionary radiations, and the global distribution of angiosperms.
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Affiliation(s)
- Sreetama Bhadra
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstraße 4, D-04103, Leipzig, Germany; Leipzig University, Ritterstraße 26, 04109 Leipzig, Germany.
| | - Ilia J Leitch
- Royal Botanic Gardens, Kew, Kew Green, Richmond TW9 3AE, UK
| | - Renske E Onstein
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstraße 4, D-04103, Leipzig, Germany; Leipzig University, Ritterstraße 26, 04109 Leipzig, Germany; Naturalis Biodiversity Center, Darwinweg 2, 2333 CR Leiden, The Netherlands
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7
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Martín-Hernanz S, Albaladejo RG, Lavergne S, Rubio E, Marín-Rodulfo M, Arroyo J, Aparicio A. Strong conservatism of floral morphology during the rapid diversification of the genus Helianthemum. AMERICAN JOURNAL OF BOTANY 2023; 110:e16155. [PMID: 36912727 DOI: 10.1002/ajb2.16155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 05/16/2023]
Abstract
PREMISE Divergence of floral morphology and breeding systems are often expected to be linked to angiosperm diversification and environmental niche divergence. However, available evidence for such relationships is not generalizable due to different taxonomic, geographical and time scales. The Palearctic genus Helianthemum shows the highest diversity of the family Cistaceae in terms of breeding systems, floral traits, and environmental conditions as a result of three recent evolutionary radiations since the Late Miocene. Here, we investigated the tempo and mode of evolution of floral morphology in the genus and its link with species diversification and environmental niche divergence. METHODS We quantified 18 floral traits from 83 taxa and applied phylogenetic comparative methods using a robust phylogenetic framework based on genotyping-by-sequencing data. RESULTS We found three different floral morphologies, putatively related to three different breeding systems: type I, characterized by small flowers without herkogamy and low pollen to ovule ratio; type II, represented by large flowers with approach herkogamy and intermediate pollen to ovule ratio; and type III, featured by small flowers with reverse herkogamy and the highest pollen to ovule ratio. Each morphology has been highly conserved across each radiation and has evolved independently of species diversification and ecological niche divergence. CONCLUSIONS The combined results of trait, niche, and species diversification ultimately recovered a pattern of potentially non-adaptive radiations in Helianthemum and highlight the idea that evolutionary radiations can be decoupled from floral morphology evolution even in lineages that diversified in heterogeneous environments as the Mediterranean Basin.
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Affiliation(s)
- Sara Martín-Hernanz
- Departamento de Biología Vegetal y Ecología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, Spain
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3DS, UK
| | - Rafael G Albaladejo
- Departamento de Biología Vegetal y Ecología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, Spain
| | - Sébastien Lavergne
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Laboratoire d'Ecologie Alpine (LECA), FR-38000, Grenoble, France
| | - Encarnación Rubio
- Departamento de Biología Vegetal y Ecología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, Spain
| | - Macarena Marín-Rodulfo
- Departamento de Biología Vegetal y Ecología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, Spain
- Departamento de Botánica, Facultad de Ciencias, Universidad de Granada, Granada, Spain
| | - Juan Arroyo
- Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain
| | - Abelardo Aparicio
- Departamento de Biología Vegetal y Ecología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, Spain
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8
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Cerca J, Cotoras DD, Bieker VC, De-Kayne R, Vargas P, Fernández-Mazuecos M, López-Delgado J, White O, Stervander M, Geneva AJ, Guevara Andino JE, Meier JI, Roeble L, Brée B, Patiño J, Guayasamin JM, Torres MDL, Valdebenito H, Castañeda MDR, Chaves JA, Díaz PJ, Valente L, Knope ML, Price JP, Rieseberg LH, Baldwin BG, Emerson BC, Rivas-Torres G, Gillespie R, Martin MD. Evolutionary genomics of oceanic island radiations. Trends Ecol Evol 2023:S0169-5347(23)00032-0. [PMID: 36870806 DOI: 10.1016/j.tree.2023.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 01/26/2023] [Accepted: 02/02/2023] [Indexed: 03/06/2023]
Abstract
A recurring feature of oceanic archipelagos is the presence of adaptive radiations that generate endemic, species-rich clades that can offer outstanding insight into the links between ecology and evolution. Recent developments in evolutionary genomics have contributed towards solving long-standing questions at this interface. Using a comprehensive literature search, we identify studies spanning 19 oceanic archipelagos and 110 putative adaptive radiations, but find that most of these radiations have not yet been investigated from an evolutionary genomics perspective. Our review reveals different gaps in knowledge related to the lack of implementation of genomic approaches, as well as undersampled taxonomic and geographic areas. Filling those gaps with the required data will help to deepen our understanding of adaptation, speciation, and other evolutionary processes.
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Affiliation(s)
- José Cerca
- Department of Natural History, NTNU University Museum, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, Oslo, Norway.
| | - Darko D Cotoras
- Department of Terrestrial Zoology, Senckenberg Research Institute and Natural History Museum, Senckenberganlage 25, 60325 Frankfurt am Main, Germany; Department of Entomology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA 94118, USA
| | - Vanessa C Bieker
- Department of Natural History, NTNU University Museum, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Rishi De-Kayne
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh EH9 3FL, UK
| | - Pablo Vargas
- Biodiversity and Conservation, Real Jardín Botánico, 28014 Madrid, Spain
| | - Mario Fernández-Mazuecos
- Departamento de Biología (Botánica), Facultad de Ciencias, Universidad Autónoma de Madrid, Calle Darwin 2, 28049 Madrid, Spain; Centro de Investigación en Biodiversidad y Cambio Global, Universidad Autónoma de Madrid (CIBC-UAM), Calle Darwin 2, 28049 Madrid, Spain
| | - Julia López-Delgado
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Oliver White
- Department of Life Sciences, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
| | - Martin Stervander
- Bird Group, Natural History Museum, Akeman Street, Tring, Hertfordshire HP23 6AP, UK
| | - Anthony J Geneva
- Department of Biology and Center for Computational and Integrative Biology, Rutgers University-Camden, Camden, NJ, USA
| | - Juan Ernesto Guevara Andino
- Grupo de Investigación en Biodiversidad Medio Ambiente y Salud (BIOMAS), Universidad de las Américas, Quito, Ecuador
| | - Joana Isabel Meier
- Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK
| | - Lizzie Roeble
- Naturalis Biodiversity Center, Darwinweg 2, 2333 CR Leiden, The Netherlands; Groningen Institute for Evolutionary Life Sciences, University of Groningen, Box 11103, 9700, 5 CC Groningen, The Netherlands
| | - Baptiste Brée
- Université de Pau et des Pays de l'Adour (UPPA), Energy Environment Solutions (E2S), Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM), 64000 Pau, France
| | - Jairo Patiño
- Island Ecology and Evolution Research Group, Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Calle Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Canary Islands, 38206, Spain
| | - Juan M Guayasamin
- Laboratorio de Biología Evolutiva, Instituto Biósfera, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito (USFQ), Calle Diego de Robles y Avenida Pampite, Cumbayá, 170901 Quito, Ecuador; Galapagos Science Center, Universidad San Francisco de Quito (USFQ) and University of North Carolina (UNC) at Chapel Hill, San Cristobal, Galapagos, Ecuador
| | - María de Lourdes Torres
- Laboratorio de Biotecnología Vegetal, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito (USFQ), Calle Diego de Robles y Avenida Pampite, Cumbayá, Quito, Ecuador; Galapagos Science Center, Universidad San Francisco de Quito (USFQ) and University of North Carolina (UNC) at Chapel Hill, San Cristobal, Galapagos, Ecuador
| | - Hugo Valdebenito
- Galapagos Science Center, Universidad San Francisco de Quito (USFQ) and University of North Carolina (UNC) at Chapel Hill, San Cristobal, Galapagos, Ecuador; Herbarium of Economic Botany of Ecuador (Herabario QUSF), Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito (USFQ), Calle Diego de Robles y Avenida Pampite, Cumbayá, Quito, Ecuador
| | | | - Jaime A Chaves
- Department of Biology, San Francisco State University, San Francisco, CA 94132, USA; Laboratorio de Biología Evolutiva, Instituto Biósfera, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito (USFQ), Calle Diego de Robles y Avenida Pampite, Cumbayá, 170901 Quito, Ecuador
| | - Patricia Jaramillo Díaz
- Estación Científica Charles Darwin, Fundación Charles Darwin, Santa Cruz, Galápagos, Ecuador; Department of Botany and Plant Physiology, University of Málaga, Málaga, Spain
| | - Luis Valente
- Naturalis Biodiversity Center, Darwinweg 2, 2333 CR Leiden, The Netherlands; Groningen Institute for Evolutionary Life Sciences, University of Groningen, Box 11103, 9700, 5 CC Groningen, The Netherlands
| | - Matthew L Knope
- Department of Biology, University of Hawai'i at Hilo, 200 West Kawili Street, Hilo, 96720, HI, USA
| | - Jonathan P Price
- Department of Biology, University of Hawai'i at Hilo, 200 West Kawili Street, Hilo, 96720, HI, USA
| | - Loren H Rieseberg
- Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, BC, Canada
| | - Bruce G Baldwin
- Jepson Herbarium and Department of Integrative Biology, 1001 Valley Life Sciences Building 2465, University of California, Berkeley, CA 94720-2465, USA
| | - Brent C Emerson
- Island Ecology and Evolution Research Group, Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), La Laguna, Spain
| | - Gonzalo Rivas-Torres
- Estación Científica Charles Darwin, Fundación Charles Darwin, Santa Cruz, Galápagos, Ecuador; Estación de Biodiversidad Tiputini, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito (USFQ), Quito, Ecuador
| | - Rosemary Gillespie
- Department of Environmental Science, Policy and Management, University of California, Berkeley, Berkeley, CA, USA
| | - Michael D Martin
- Department of Natural History, NTNU University Museum, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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9
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Smith C, Zięba G, Spence R, Przybylski M. Spatial heterogeneity in pH, body size and habitat size generates ecological opportunity in an evolutionary radiation. JOURNAL OF FISH BIOLOGY 2022; 101:1501-1508. [PMID: 36134556 DOI: 10.1111/jfb.15221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
Much of the biological diversity we see today is thought to be the product of evolutionary radiation, the rapid proliferation of species from a single ancestor into multiple discrete forms. Spatial heterogeneity in environmental variables has been proposed as creating the necessary ecological opportunity to stimulate evolutionary radiation. Nonetheless, the ecological mechanisms generating and maintaining diversity in spatially heterogeneous environments are not fully understood. The authors investigated the role of strong spatial heterogeneity in generating ecological opportunity in an evolutionary radiation of freshwater populations of the three-spined stickleback (Gasterosteus aculeatus L.) on the island of North Uist using a spatially explicit Bayesian model. The authors identified pH, loch surface area and body size as predictors of variance in the number of lateral plates that comprise anti-predator armour in G. aculeatus. An East-West gradient of pH, a product of the distinctive environment of North Uist, generates a robust selective environment facilitating G. aculeatus evolutionary radiation. Larger lochs were associated with atypical phenotypes, possibly related to larger population sizes and greater selection efficiency. An association between pH and lateral plate number is likely an effect of body size, with a positive relationship between body size and lateral plate number that is mediated by swimming efficiency in G. aculeatus.
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Affiliation(s)
- Carl Smith
- Department of Ecology & Vertebrate Zoology, University of Łódź, Łódź, Poland
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
| | - Grzegorz Zięba
- Department of Ecology & Vertebrate Zoology, University of Łódź, Łódź, Poland
| | - Rowena Spence
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
| | - Mirosław Przybylski
- Department of Ecology & Vertebrate Zoology, University of Łódź, Łódź, Poland
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10
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Naciri Y, Toprak Z, Prentice HC, Hugot L, Troia A, Burgarella C, Gradaille JL, Jeanmonod D. Convergent Morphological Evolution in Silene Sect. Italicae (Caryophyllaceae) in the Mediterranean Basin. FRONTIERS IN PLANT SCIENCE 2022; 13:695958. [PMID: 35903238 PMCID: PMC9319200 DOI: 10.3389/fpls.2022.695958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
Recent divergence can obscure species boundaries among closely related taxa. Silene section Italicae (Caryophyllaceae) has been taxonomically controversial, with about 30 species described. We investigate species delimitation within this section using 500 specimens sequenced for one nuclear and two plastid markers. Despite the use of a small number of genes, the large number of sequenced samples allowed confident delimitation of 50% of the species. The delimitation of other species (e.g., Silene nemoralis, S. nodulosa and S. andryalifolia) was more challenging. We confirmed that seven of the ten chasmophyte species in the section are not related to each other but are, instead, genetically closer to geographically nearby species belonging to Italicae yet growing in open habitats. Adaptation to chasmophytic habitats therefore appears to have occurred independently, as a result of convergent evolution within the group. Species from the Western Mediterranean Basin showed more conflicting species boundaries than species from the Eastern Mediterranean Basin, where there are fewer but better-delimited species. Significant positive correlations were found between an estimation of the effective population size of the taxa and their extent of occurrence (EOO) or area of occupancy (AOO), and negative but non-significant correlations between the former and the posterior probability (PP) of the corresponding clades. These correlations might suggest a lower impact of incomplete lineage sorting in species with low effective population sizes and small distributional ranges compared with that in species inhabiting large areas. Finally, we confirmed that S. italica and S. nemoralis are distinct species, that S. nemoralis might furthermore include two different species and that S. velutina from Corsica and S. hicesiae from the Lipari Islands are sister species.
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Affiliation(s)
- Yamama Naciri
- Unité Systématique et Médiation, Conservatoire et Jardin botaniques de Genève, Geneva, Switzerland
- Plant Systematics and Biodiversity Laboratory, Department of Botany and Plant Biology, University of Geneva, Geneva, Switzerland
| | - Zeynep Toprak
- Unité Systématique et Médiation, Conservatoire et Jardin botaniques de Genève, Geneva, Switzerland
- Plant Systematics and Biodiversity Laboratory, Department of Botany and Plant Biology, University of Geneva, Geneva, Switzerland
- Department of Molecular Biology and Genetic, Faculty of Sciences, University of Dicle, Diyarbakir, Turkey
| | | | - Laetitia Hugot
- Conservatoire botanique national de Corse, Office de l’Environment de la Corse, Corte, France
| | - Angelo Troia
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Università degli Studi di Palermo, Palermo, Italy
| | | | | | - Daniel Jeanmonod
- Unité Systématique et Médiation, Conservatoire et Jardin botaniques de Genève, Geneva, Switzerland
- Plant Systematics and Biodiversity Laboratory, Department of Botany and Plant Biology, University of Geneva, Geneva, Switzerland
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11
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Niche expansion and adaptive divergence in the global radiation of crows and ravens. Nat Commun 2022; 13:2086. [PMID: 35449129 PMCID: PMC9023458 DOI: 10.1038/s41467-022-29707-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 03/09/2022] [Indexed: 11/20/2022] Open
Abstract
The processes that allow some lineages to diversify rapidly at a global scale remain poorly understood. Although earlier studies emphasized the importance of dispersal, global expansions expose populations to novel environments and may also require adaptation and diversification across new niches. In this study, we investigated the contributions of these processes to the global radiation of crows and ravens (genus Corvus). Combining a new phylogeny with comprehensive phenotypic and climatic data, we show that Corvus experienced a massive expansion of the climatic niche that was coupled with a substantial increase in the rates of species and phenotypic diversification. The initiation of these processes coincided with the evolution of traits that promoted dispersal and niche expansion. Our findings suggest that rapid global radiations may be better understood as processes in which high dispersal abilities synergise with traits that, like cognition, facilitate persistence in new environments. Traits that facilitate adaptive responses to novel environments may facilitate global radiations. Here, the authors describe diversification dynamics of crows, finding that their global radiation coincides with high rates of phenotypic and climatic niche evolution.
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12
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Daane JM, William Detrich H. Adaptations and Diversity of Antarctic Fishes: A Genomic Perspective. Annu Rev Anim Biosci 2021; 10:39-62. [PMID: 34748709 DOI: 10.1146/annurev-animal-081221-064325] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Antarctic notothenioid fishes are the classic example of vertebrate adaptive radiation in a marine environment. Notothenioids diversified from a single common ancestor ∼25 Mya to more than 140 species today, and they represent ∼90% of fish biomass on the continental shelf of Antarctica. As they diversified in the cold Southern Ocean, notothenioids evolved numerous traits, including osteopenia, anemia, cardiomegaly, dyslipidemia, and aglomerular kidneys, that are beneficial or tolerated in their environment but are pathological in humans. Thus, notothenioids are models for understanding adaptive radiations, physiological and biochemical adaptations to extreme environments, and genetic mechanisms of human disease. Since 2014, 16 notothenioid genomes have been published, which enable a first-pass holistic analysis of the notothenioid radiation and the genetic underpinnings of novel notothenioid traits. Here, we review the notothenioid radiation from a genomic perspective and integrate our insights with recent observations from other fish radiations. Expected final online publication date for the Annual Review of Animal Biosciences, Volume 10 is February 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Jacob M Daane
- Department of Marine and Environmental Sciences, Northeastern University Marine Science Center, Nahant, Massachusetts, USA
| | - H William Detrich
- Department of Marine and Environmental Sciences, Northeastern University Marine Science Center, Nahant, Massachusetts, USA
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13
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Wasiljew BD, Pfaender J, Wipfler B, Gabelaia M, Utama IV, Wantania LL, Herder F. Sexual dimorphism in an adaptive radiation: Does intersexual niche differentiation result in ecological character displacement? Ecol Evol 2021; 11:14615-14629. [PMID: 34765129 PMCID: PMC8571569 DOI: 10.1002/ece3.8137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 12/22/2022] Open
Abstract
Evolutionary radiations are one plausible explanation for the rich biodiversity on Earth. Adaptive radiations are the most studied form of evolutionary radiations, and ecological opportunity has been identified as one factor permitting them. Competition among individuals is supposedly highest in populations of conspecifics. Divergent modes of resource use might minimize trophic overlap, and thus intersexual competition, resulting in ecological character displacement between sexes. However, the role of intersexual differentiation in speciation processes is insufficiently studied. The few studies available suggest that intersexual niche differentiation exists in adaptive radiations, but their role within the radiation, and the extent of differentiation within the organism itself, remains largely unexplored. Here, we test the hypothesis that multiple morphological structures are affected by intersexual niche differentiation in "roundfin" Telmatherina, the first case where intersexual niche differentiation was demonstrated in an adaptive fish radiation. We show that sexes of two of the three morphospecies differ in several structural components of the head, all of these are likely adaptive. Sexual dimorphism is linked to the respective morphospecies-specific ecology and affects several axes of variation. Trait variation translates into different feeding modes, processing types, and habitat usages that add to interspecific variation in all three morphospecies. Intrasexual selection, that is, male-male competition, may contribute to variation in some of the traits, but appears unlikely in internal structures, which are invisible to other individuals. We conclude that intersexual variation adds to the adaptive diversity of roundfins and might play a key role in minimizing intersexual competition in emerging radiations.
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Affiliation(s)
| | | | | | | | - Ilham Vemandra Utama
- Division of ZoologyIchthyology LaboratoryResearch Center for BiologyIndonesian Institute of Sciences (LIPI)CibinongIndonesia
| | - Letha Louisiana Wantania
- Zoologisches Forschungsmuseum Alexander KoenigBonnGermany
- Faculty of Fisheries and Marine ScienceSam Ratulangi UniversityManadoIndonesia
| | - Fabian Herder
- Zoologisches Forschungsmuseum Alexander KoenigBonnGermany
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14
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Neinavaie F, Ibrahim-Hashim A, Kramer AM, Brown JS, Richards CL. The Genomic Processes of Biological Invasions: From Invasive Species to Cancer Metastases and Back Again. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.681100] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The concept of invasion is useful across a broad range of contexts, spanning from the fine scale landscape of cancer tumors up to the broader landscape of ecosystems. Invasion biology provides extraordinary opportunities for studying the mechanistic basis of contemporary evolution at the molecular level. Although the field of invasion genetics was established in ecology and evolution more than 50 years ago, there is still a limited understanding of how genomic level processes translate into invasive phenotypes across different taxa in response to complex environmental conditions. This is largely because the study of most invasive species is limited by information about complex genome level processes. We lack good reference genomes for most species. Rigorous studies to examine genomic processes are generally too costly. On the contrary, cancer studies are fortified with extensive resources for studying genome level dynamics and the interactions among genetic and non-genetic mechanisms. Extensive analysis of primary tumors and metastatic samples have revealed the importance of several genomic mechanisms including higher mutation rates, specific types of mutations, aneuploidy or whole genome doubling and non-genetic effects. Metastatic sites can be directly compared to primary tumor cell counterparts. At the same time, clonal dynamics shape the genomics and evolution of metastatic cancers. Clonal diversity varies by cancer type, and the tumors’ donor and recipient tissues. Still, the cancer research community has been unable to identify any common events that provide a universal predictor of “metastatic potential” which parallels findings in evolutionary ecology. Instead, invasion in cancer studies depends strongly on context, including order of events and clonal composition. The detailed studies of the behavior of a variety of human cancers promises to inform our understanding of genome level dynamics in the diversity of invasive species and provide novel insights for management.
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15
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Granados Mendoza C, Martínez Salas EM, Goetghebeur P, Wanke S, Samain MS. Molecular Phylogeny, Character Evolution, and Biogeography of Hydrangea Section Cornidia, Hydrangeaceae. FRONTIERS IN PLANT SCIENCE 2021; 12:661522. [PMID: 34267769 PMCID: PMC8276264 DOI: 10.3389/fpls.2021.661522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 05/11/2021] [Indexed: 06/13/2023]
Abstract
Background: Hydrangea section Cornidia consists of 26 currently accepted species and a yet undefined number of new species and erroneously synonymized taxa. This clade consists of (sub)tropical lianas occurring from northern Mexico to southern Chile and Argentina, and one species from Southeast Asia. Currently, no molecular phylogenetic hypothesis is available that includes more than a few species of this section. Hence, a resolved and well-sampled molecular phylogenetic hypothesis may help to enforce taxonomic decisions. In this study, we present a phylogenetic framework based on sequences from two low copy nuclear genes from a comprehensive taxon sampling of H. section Cornidia and a selection of outgroups. Our phylogenetic reconstructions prove the non-monophyly of the traditionally recognized subsections Monosegia and Polysegia and their corresponding series, Speciosae and Aphananthae, and Synstyleae and Chorystyleae, respectively. Three morphologically defined species were recovered with high support as monophyletic, namely, Hydrangea panamensis, Hydrangea serratifolia, and Hydrangea tarapotensis. However, statistical support for some shallow nodes did not allow to refute, with high support, the monophyly of several of the herein recognized species for which more than one individual could be analyzed. Based on the obtained phylogenetic framework, we reconstructed the evolution of selected reproductive characters. Hydrangea section Cornidia is the only genus section for which dioecism has been extensively documented. Our character reconstruction of sexual dimorphism shows that dioecism is the ancestral state in this section and that this was reversed to monoecy in Hydrangea seemannii and Hydrangea integrifolia. Character reconstruction for the enlarged marginal flowers recovered their presence as the ancestral character state in H. section Cornidia, although at least three internal lineages independently lost them; thus, losses were reconstructed to be more likely than gain. With respect to the flower color, more species exhibit white than red flowers, and white is reconstructed as the ancestral state. Cornidia also shows an unusual disjunct geographic distribution between Asia and Central Mesoamerica-South America, as it is not present in the USA and Canada. The origin of Cornidia is reconstructed to be the New World with higher probability, and the presence of one species in Asia is likely due to long-distance dispersal.
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Affiliation(s)
- Carolina Granados Mendoza
- Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Mexico City, Mexico
- Research Group Spermatophytes, Ghent University, Gent, Belgium
- Institut für Botanik, Technische Universität Dresden, Dresden, Germany
| | - Esteban Manuel Martínez Salas
- Herbario Nacional de México, Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Paul Goetghebeur
- Ghent University Museum, Botanical Garden, Ghent University, Gent, Belgium
| | - Stefan Wanke
- Institut für Botanik, Technische Universität Dresden, Dresden, Germany
| | - Marie-Stéphanie Samain
- Red de Diversidad Biológica del Occidente Mexicano, Centro Regional del Bajío, Instituto de Ecología, A.C., Pátzcuaro, Michoacán, Mexico
- Systematic and Evolutionary Botany Lab, Department of Biology, Ghent University, Gent, Belgium
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16
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Velo-Antón G, Lourenço A, Galán P, Nicieza A, Tarroso P. Landscape resistance constrains hybridization across contact zones in a reproductively and morphologically polymorphic salamander. Sci Rep 2021; 11:9259. [PMID: 33927228 PMCID: PMC8085075 DOI: 10.1038/s41598-021-88349-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 04/07/2021] [Indexed: 02/02/2023] Open
Abstract
Explicitly accounting for phenotypic differentiation together with environmental heterogeneity is crucial to understand the evolutionary dynamics in hybrid zones. Species showing intra-specific variation in phenotypic traits that meet across environmentally heterogeneous regions constitute excellent natural settings to study the role of phenotypic differentiation and environmental factors in shaping the spatial extent and patterns of admixture in hybrid zones. We studied three environmentally distinct contact zones where morphologically and reproductively divergent subspecies of Salamandra salamandra co-occur: the pueriparous S. s. bernardezi that is mostly parapatric to its three larviparous subspecies neighbours. We used a landscape genetics framework to: (i) characterise the spatial location and extent of each contact zone; (ii) assess patterns of introgression and hybridization between subspecies pairs; and (iii) examine the role of environmental heterogeneity in the evolutionary dynamics of hybrid zones. We found high levels of introgression between parity modes, and between distinct phenotypes, thus demonstrating the evolution to pueriparity alone or morphological differentiation do not lead to reproductive isolation between these highly divergent S. salamandra morphotypes. However, we detected substantial variation in patterns of hybridization across contact zones, being lower in the contact zone located on a topographically complex area. We highlight the importance of accounting for spatial environmental heterogeneity when studying evolutionary dynamics of hybrid zones.
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Affiliation(s)
- Guillermo Velo-Antón
- grid.5808.50000 0001 1503 7226CIBIO/InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos da Universidade do Porto, Instituto de Ciências Agrárias de Vairão. R. Padre Armando Quintas, 4485-661 Vairão, Portugal ,grid.6312.60000 0001 2097 6738Universidade de Vigo, Grupo de Ecoloxía Animal, Departamento de Ecoloxía e Bioloxía Animal, Torre Cacti (Lab 97), 36310 Vigo, Spain
| | - André Lourenço
- grid.5808.50000 0001 1503 7226CIBIO/InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos da Universidade do Porto, Instituto de Ciências Agrárias de Vairão. R. Padre Armando Quintas, 4485-661 Vairão, Portugal ,grid.5808.50000 0001 1503 7226Departamento de Biologia da Faculdade de Ciências, Universidade do Porto. Rua Campo Alegre, 4169-007 Porto, Portugal
| | - Pedro Galán
- grid.8073.c0000 0001 2176 8535Grupo de Investigación en Bioloxía Evolutiva (GIBE), Departamento de Bioloxía, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira, s/n, 15071 A Coruña, Spain
| | - Alfredo Nicieza
- grid.10863.3c0000 0001 2164 6351Departamento de Biologıa de Organismos y Sistemas, Universidad de Oviedo, Oviedo, Spain ,grid.10863.3c0000 0001 2164 6351Unidad Mixta de Investigacion en Biodiversidad (UMIB), CSIC-Universidad de Oviedo-Principado de Asturias, Mieres, Spain
| | - Pedro Tarroso
- grid.5808.50000 0001 1503 7226CIBIO/InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos da Universidade do Porto, Instituto de Ciências Agrárias de Vairão. R. Padre Armando Quintas, 4485-661 Vairão, Portugal
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17
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Cetlová V, Zozomová-Lihová J, Melichárková A, Mártonfiová L, Španiel S. Multiple Drivers of High Species Diversity and Endemism Among Alyssum Annuals in the Mediterranean: The Evolutionary Significance of the Aegean Hotspot. FRONTIERS IN PLANT SCIENCE 2021; 12:627909. [PMID: 33986760 PMCID: PMC8112278 DOI: 10.3389/fpls.2021.627909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 03/22/2021] [Indexed: 05/10/2023]
Abstract
The Mediterranean Basin is a significant hotspot of species diversity and endemism, with various distribution patterns and speciation mechanisms observed in its flora. High species diversity in the Mediterranean is also manifested in the monophyletic lineage of Alyssum annuals (Brassicaceae), but little is known about its origin. These species include both diploids and polyploids that grow mainly in open and disturbed sites across a wide elevational span and show contrasting distribution patterns, ranging from broadly distributed Eurasian species to narrow island endemics. Here, we investigated the evolution of European representatives of this lineage, and aimed to reconstruct their phylogeny, polyploid and genome size evolution using flow cytometric analyses, chloroplast and nuclear high- and low-copy DNA markers. The origin and early diversification of the studied Alyssum lineage could be dated back to the Late Miocene/Pliocene and were likely promoted by the onset of the Mediterranean climate, whereas most of the extant species originated during the Pleistocene. The Aegean region represents a significant diversity center, as it hosts 12 out of 16 recognized European species and comprises several (sub)endemics placed in distinct phylogenetic clades. Because several species, including the closest relatives, occur here sympatrically without apparent niche differences, we can reject simple allopatric speciation via vicariance as well as ecological speciation for most cases. Instead, we suggest scenarios of more complex speciation processes that involved repeated range shifts in response to sea-level changes and recurrent land connections and disconnections since the Pliocene. In addition, multiple polyploidization events significantly contributed to species diversity across the entire distribution range. All seven polyploids, representing both widespread species and endemics to the western or eastern Mediterranean, were inferred to be allopolyploids. Finally, the current distribution patterns have likely been affected also by the human factor (farming and grazing). This study illustrates the complexity of evolutionary and speciation processes in the Mediterranean flora.
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Affiliation(s)
- Veronika Cetlová
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Judita Zozomová-Lihová
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Andrea Melichárková
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Lenka Mártonfiová
- Botanical Garden of P. J. Šafárik University in Košice, Košice, Slovakia
| | - Stanislav Španiel
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia
- Department of Botany, Faculty of Science, Charles University, Prague, Czechia
- *Correspondence: Stanislav Španiel,
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18
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Rapini A, Bitencourt C, Luebert F, Cardoso D. An escape-to-radiate model for explaining the high plant diversity and endemism in campos rupestres†. Biol J Linn Soc Lond 2020. [DOI: 10.1093/biolinnean/blaa179] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
With extraordinary levels of plant diversity and endemism, the Brazilian campos rupestres across the Espinhaço Range have a species/area ratio 40 times higher than the lowland Amazon. Although diversification drivers in campos rupestres remain a matter of debate, the Pleistocene refugium hypothesis (PRH) is often adopted as the most plausible explanation for their high diversity. The PRH has two main postulates: highland interglacial refugia and a species pump mechanism catalysed by climatic changes. We critically assessed studies on campos rupestres diversification at different evolutionary levels and conclude that most of them are affected by sampling biases, unrealistic assumptions or inaccurate results that do not support the PRH. By modelling the palaeo-range of campos rupestres based on the distribution of 1123 species of vascular plants endemic to the Espinhaço Range and using climate and edaphic variables, we projected a virtually constant suitable area for campos rupestres across the last glacial cycle. We challenge the great importance placed on Pleistocene climatic oscillations in campos rupestres plant diversification and offer an alternative explanation named escape-to-radiate model, which emphasizes niche shifts. Under this biogeographic model of diversification, the long-term fragmentation of campos rupestres combined with recurrent extinctions after genetic drift and sporadic events of adaptive radiation may provide an explanation for the current diversity and endemism in the Espinhaço Range. We conclude that long-term diversification dynamics in campos rupestres are mainly driven by selection, while most endemic diversity is ephemeral, extremely fragile and mainly driven by drift.
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Affiliation(s)
- Alessandro Rapini
- Programa de Pós-graduação em Botânica, Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s.n., Novo Horizonte, Feira de Santana, Bahia, Brazil
| | - Cássia Bitencourt
- Programa de Pós-graduação em Botânica, Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s.n., Novo Horizonte, Feira de Santana, Bahia, Brazil
| | - Federico Luebert
- Departmento de Silvicultura y Conservación de la Naturaleza, Universidad de Chile, Santa Rosa 11315, La Pintana, Santiago, Chile
| | - Domingos Cardoso
- Programa de Pós-graduação em Botânica, Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s.n., Novo Horizonte, Feira de Santana, Bahia, Brazil
- National Institute of Science and Technology in Interdisciplinary and Transdisciplinary Studies in Ecology and Evolution (INCT IN-TREE), Instituto de Biologia, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s.n., Ondina, Salvador, Bahia, Brazil
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Fernández-Mazuecos M, Vargas P, McCauley RA, Monjas D, Otero A, Chaves JA, Guevara Andino JE, Rivas-Torres G. The Radiation of Darwin’s Giant Daisies in the Galápagos Islands. Curr Biol 2020; 30:4989-4998.e7. [DOI: 10.1016/j.cub.2020.09.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/04/2020] [Accepted: 09/07/2020] [Indexed: 12/13/2022]
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20
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Samad NA, Hidalgo O, Saliba E, Siljak-Yakovlev S, Strange K, Leitch IJ, Dagher-Kharrat MB. Genome Size Evolution and Dynamics in Iris, with Special Focus on the Section Oncocyclus. PLANTS 2020; 9:plants9121687. [PMID: 33271865 PMCID: PMC7760388 DOI: 10.3390/plants9121687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/21/2020] [Accepted: 11/26/2020] [Indexed: 12/27/2022]
Abstract
Insights into genome size dynamics and its evolutionary impact remain limited by the lack of data for many plant groups. One of these is the genus Iris, of which only 53 out of c. 260 species have available genome sizes. In this study, we estimated the C-values for 41 species and subspecies of Iris mainly from the Eastern Mediterranean region. We constructed a phylogenetic framework to shed light on the distribution of genome sizes across subgenera and sections of Iris. Finally, we tested evolutionary models to explore the mode and tempo of genome size evolution during the radiation of section Oncocyclus. Iris as a whole displayed a great variety of C-values; however, they were unequally distributed across the subgenera and sections, suggesting that lineage-specific patterns of genome size diversification have taken place within the genus. The evolutionary model that best fitted our data was the speciational model, as changes in genome size appeared to be mainly associated with speciation events. These results suggest that genome size dynamics may have contributed to the radiation of Oncocyclus irises. In addition, our phylogenetic analysis provided evidence that supports the segregation of the Lebanese population currently attributed to Iris persica as a distinct species.
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Affiliation(s)
- Nour Abdel Samad
- Laboratoire Biodiversité et Génomique Fonctionnelle, Faculté des Sciences, Campus Sciences et Technologies, Université Saint-Joseph, Mar Roukos, Mkalles, BP: 1514 Riad el Solh, Beirut 1107 2050, Lebanon; (N.A.S.); (E.S.)
- Ecologie Systématique Evolution, Université Paris-Saclay, CNRS, AgroParisTech, 91400 Orsay, France;
| | - Oriane Hidalgo
- Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK; (K.S.); (I.J.L.)
- Institut Botànic de Barcelona (IBB, CSIC-Ajuntament de Barcelona), Passeig del Migdia s.n., 08038 Barcelona, Spain
- Correspondence: (O.H.); (M.B.D.-K.)
| | - Elie Saliba
- Laboratoire Biodiversité et Génomique Fonctionnelle, Faculté des Sciences, Campus Sciences et Technologies, Université Saint-Joseph, Mar Roukos, Mkalles, BP: 1514 Riad el Solh, Beirut 1107 2050, Lebanon; (N.A.S.); (E.S.)
| | - Sonja Siljak-Yakovlev
- Ecologie Systématique Evolution, Université Paris-Saclay, CNRS, AgroParisTech, 91400 Orsay, France;
| | - Kit Strange
- Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK; (K.S.); (I.J.L.)
| | - Ilia J. Leitch
- Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK; (K.S.); (I.J.L.)
| | - Magda Bou Dagher-Kharrat
- Laboratoire Biodiversité et Génomique Fonctionnelle, Faculté des Sciences, Campus Sciences et Technologies, Université Saint-Joseph, Mar Roukos, Mkalles, BP: 1514 Riad el Solh, Beirut 1107 2050, Lebanon; (N.A.S.); (E.S.)
- Correspondence: (O.H.); (M.B.D.-K.)
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21
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Svardal H, Salzburger W, Malinsky M. Genetic Variation and Hybridization in Evolutionary Radiations of Cichlid Fishes. Annu Rev Anim Biosci 2020; 9:55-79. [PMID: 33197206 DOI: 10.1146/annurev-animal-061220-023129] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Evolutionary radiations are responsible for much of the variation in biodiversity across taxa. Cichlid fishes are well known for spectacular evolutionary radiations, as they have repeatedly evolved into large and phenotypically diverse arrays of species. Cichlid genomes carry signatures of past events and, at the same time, are the substrate for ongoing evolution. We survey genome-wide data and the available literature covering 438 cichlid populations (412 species) across multiple radiations to synthesize information about patterns and sharing of genetic variation. Nucleotide diversity within species is low in cichlids, with 92% of surveyed populations having less diversity than the median value found in other vertebrates. Divergence within radiations is also low, and a large proportion of variation is shared among species due to incomplete lineage sorting and widespread hybridization. Population genetics therefore provides a suitable conceptual framework for evolutionary genomic studies of cichlid radiations. We focus in detail on the roles of hybridization in shaping the patterns of genetic variation and in promoting cichlid diversification.
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Affiliation(s)
- Hannes Svardal
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium; .,Naturalis Biodiversity Center, 2333 Leiden, The Netherlands
| | - Walter Salzburger
- Zoological Institute, University of Basel, 4051 Basel, Switzerland; ,
| | - Milan Malinsky
- Zoological Institute, University of Basel, 4051 Basel, Switzerland; ,
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22
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Carleton KL, Conte MA, Malinsky M, Nandamuri SP, Sandkam BA, Meier JI, Mwaiko S, Seehausen O, Kocher TD. Movement of transposable elements contributes to cichlid diversity. Mol Ecol 2020; 29:4956-4969. [PMID: 33049090 DOI: 10.1111/mec.15685] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 10/02/2020] [Accepted: 10/05/2020] [Indexed: 12/11/2022]
Abstract
African cichlid fishes are a prime model for studying speciation mechanisms. Despite the development of extensive genomic resources, it has been difficult to determine which sources of genetic variation are responsible for cichlid phenotypic variation. One of their most variable phenotypes is visual sensitivity, with some of the largest spectral shifts among vertebrates. These shifts arise primarily from differential expression of seven cone opsin genes. By mapping expression quantitative trait loci (eQTL) in intergeneric crosses of Lake Malawi cichlids, we previously identified four causative genetic variants that correspond to indels in the promoters of either key transcription factors or an opsin gene. In this comprehensive study, we show that these indels are the result of the movement of transposable elements (TEs) that correlate with opsin expression variation across the Malawi flock. In tracking the evolutionary history of these particular indels, we found they are endemic to Lake Malawi, suggesting that these TEs are recently active and are segregating within the Malawi cichlid lineage. However, an independent indel has arisen at a similar genomic location in one locus outside of the Malawi flock. The convergence in TE movement suggests these loci are primed for TE insertion and subsequent deletions. Increased TE mobility may be associated with interspecific hybridization, which disrupts mechanisms of TE suppression. This might provide a link between cichlid hybridization and accelerated regulatory variation. Overall, our study suggests that TEs may be an important driver of key regulatory changes, facilitating rapid phenotypic change and possibly speciation in African cichlids.
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Affiliation(s)
- Karen L Carleton
- Department of Biology, University of Maryland, College Park, MD, USA
| | - Matthew A Conte
- Department of Biology, University of Maryland, College Park, MD, USA
| | - Milan Malinsky
- Wellcome Sanger Institute, Cambridge, UK.,Zoological Institute, University of Basel, Basel, Switzerland
| | | | | | - Joana I Meier
- Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.,Department of Fish Ecology and Evolution, Centre for Ecology, Evolution & Biogeochemistry, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland.,Computational and Molecular Population Genetics Laboratory, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland
| | - Salome Mwaiko
- Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.,Department of Fish Ecology and Evolution, Centre for Ecology, Evolution & Biogeochemistry, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland
| | - Ole Seehausen
- Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.,Department of Fish Ecology and Evolution, Centre for Ecology, Evolution & Biogeochemistry, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland
| | - Thomas D Kocher
- Department of Biology, University of Maryland, College Park, MD, USA
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23
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Valencia JB, Mesa J, León JG, Madriñán S, Cortés AJ. Climate Vulnerability Assessment of the Espeletia Complex on Páramo Sky Islands in the Northern Andes. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.565708] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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24
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Nürk NM, Linder HP, Onstein RE, Larcombe MJ, Hughes CE, Piñeiro Fernández L, Schlüter PM, Valente L, Beierkuhnlein C, Cutts V, Donoghue MJ, Edwards EJ, Field R, Flantua SGA, Higgins SI, Jentsch A, Liede‐Schumann S, Pirie MD. Diversification in evolutionary arenas-Assessment and synthesis. Ecol Evol 2020; 10:6163-6182. [PMID: 32607221 PMCID: PMC7319112 DOI: 10.1002/ece3.6313] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/30/2020] [Accepted: 04/06/2020] [Indexed: 12/23/2022] Open
Abstract
Understanding how and why rates of evolutionary diversification vary is a key issue in evolutionary biology, ecology, and biogeography. Evolutionary rates are the net result of interacting processes summarized under concepts such as adaptive radiation and evolutionary stasis. Here, we review the central concepts in the evolutionary diversification literature and synthesize these into a simple, general framework for studying rates of diversification and quantifying their underlying dynamics, which can be applied across clades and regions, and across spatial and temporal scales. Our framework describes the diversification rate (d) as a function of the abiotic environment (a), the biotic environment (b), and clade-specific phenotypes or traits (c); thus, d ~ a,b,c. We refer to the four components (a-d) and their interactions collectively as the "Evolutionary Arena." We outline analytical approaches to this framework and present a case study on conifers, for which we parameterize the general model. We also discuss three conceptual examples: the Lupinus radiation in the Andes in the context of emerging ecological opportunity and fluctuating connectivity due to climatic oscillations; oceanic island radiations in the context of island formation and erosion; and biotically driven radiations of the Mediterranean orchid genus Ophrys. The results of the conifer case study are consistent with the long-standing scenario that low competition and high rates of niche evolution promote diversification. The conceptual examples illustrate how using the synthetic Evolutionary Arena framework helps to identify and structure future directions for research on evolutionary radiations. In this way, the Evolutionary Arena framework promotes a more general understanding of variation in evolutionary rates by making quantitative results comparable between case studies, thereby allowing new syntheses of evolutionary and ecological processes to emerge.
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Affiliation(s)
- Nicolai M. Nürk
- Department of Plant SystematicsBayreuth Center of Ecology and Environmental Research (BayCEER)University of BayreuthBayreuthGermany
| | - H. Peter Linder
- Department of Systematic & Evolutionary BotanyUniversity of ZurichZurichSwitzerland
| | - Renske E. Onstein
- German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐LeipzigLeipzigGermany
| | | | - Colin E. Hughes
- Department of Systematic & Evolutionary BotanyUniversity of ZurichZurichSwitzerland
| | - Laura Piñeiro Fernández
- Department of Systematic & Evolutionary BotanyUniversity of ZurichZurichSwitzerland
- Department of BotanyUniversity of HohenheimStuttgartGermany
| | | | - Luis Valente
- Naturalis Biodiversity CenterUnderstanding Evolution GroupLeidenThe Netherlands
- Groningen Institute for Evolutionary Life SciencesUniversity of GroningenGroningenThe Netherlands
| | - Carl Beierkuhnlein
- Department of BiogeographyBayreuth Center of Ecology and Environmental Research (BayCEER)University of BayreuthBayreuthGermany
| | - Vanessa Cutts
- School of GeographyUniversity of NottinghamNottinghamUK
| | - Michael J. Donoghue
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticut
| | - Erika J. Edwards
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticut
| | - Richard Field
- School of GeographyUniversity of NottinghamNottinghamUK
| | | | | | - Anke Jentsch
- Department of Disturbance EcologyBayreuth Center of Ecology and Environmental Research (BayCEER)University of BayreuthBayreuthGermany
| | - Sigrid Liede‐Schumann
- Department of Plant SystematicsBayreuth Center of Ecology and Environmental Research (BayCEER)University of BayreuthBayreuthGermany
| | - Michael D. Pirie
- Johannes Gutenberg‐UniversitätMainzGermany
- University MuseumUniversity of BergenBergenNorway
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