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Processes Driving the Adaptive Radiation of a Tropical Tree (Diospyros, Ebenaceae) in New Caledonia, a Biodiversity Hotspot

Due to its special geological history, the New Caledonian Archipelago is a mosaic of soil types, and in combination with climatic conditions this results in a heterogeneous environment across relatively small distances. A group of over 20 endemic species of Diospyros (Ebenaceae) has rapidly and rece... Full description

Journal Title: Systematic biology 2016-03-01, Vol.65 (2), p.212-227
Main Author: Paun, Ovidiu
Other Authors: Turner, Barbara , Trucchi, Emiliano , Munzinger, Jérôme , Chase, Mark W , Samuel, Rosabelle
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: England: Oxford University Press
ID: ISSN: 1063-5157
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recordid: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_4748748
title: Processes Driving the Adaptive Radiation of a Tropical Tree (Diospyros, Ebenaceae) in New Caledonia, a Biodiversity Hotspot
format: Article
creator:
  • Paun, Ovidiu
  • Turner, Barbara
  • Trucchi, Emiliano
  • Munzinger, Jérôme
  • Chase, Mark W
  • Samuel, Rosabelle
subjects:
  • Adaptation, Physiological
  • Adaptive radiation
  • Biodiversity
  • Biodiversity and Ecology
  • Biological adaptation
  • Biological diversity
  • Botanics
  • Diospyros
  • Diospyros - classification
  • Diospyros - physiology
  • Dispersal
  • DNA, Plant - genetics
  • Dry forests
  • Ebenaceae
  • Ecology
  • Ecology, environment
  • Ecosystems
  • Edaphic factors
  • environment
  • Environmental Sciences
  • Evolution
  • Genetic loci
  • Genetic Speciation
  • Genetic Variation
  • Genome, Plant - genetics
  • Geology
  • Hybridization
  • Life Sciences
  • Morphology
  • Mountain forests
  • New Caledonia
  • Phylogenetics
  • Phylogeny
  • RAD-sequencing
  • Regular
  • Regular Articles
  • sequencing
  • Soil - chemistry
  • Soil adaptation
  • Soils
  • Speciation
  • Systematics
  • Systematics, Phylogenetics and taxonomy
  • taxonomy
  • Trees
  • Tropical Climate
  • Vegetal Biology
ispartof: Systematic biology, 2016-03-01, Vol.65 (2), p.212-227
description: Due to its special geological history, the New Caledonian Archipelago is a mosaic of soil types, and in combination with climatic conditions this results in a heterogeneous environment across relatively small distances. A group of over 20 endemic species of Diospyros (Ebenaceae) has rapidly and recently radiated on the archipelago after a single long-distance dispersal event. Most of the Diospyros species in the radiating group are morphologically and ecologically well differentiated, but they exhibit low levels of DNA variability. To investigate the processes that shaped the diversification of this group we employed restriction site associated DNA sequencing (RADseq). Over 8400 filtered SNPs generally confirm species delimitations and produce a well-supported phylogenetic tree. Our analyses document local introgression, but only a limited potential for gene flow over longer distances. The phylogenetic relationships point to an early regional clustering among populations and species, indicating that allopatric speciation with respect to macrohabitat (i.e., climatic conditions) may have had a role in the initial differentiation within the group. A later, more rapid radiation involved divergence with respect to microhabitat (i.e., soil preference). Several sister species in the group show a parallel divergence in edaphic preference. Searches for genomic regions that are systematically differentiated in this replicated phenotypic divergence pointed to loci potentially involved in ion binding and cellular transport. These loci appear meaningful in the context of adaptations to soil types that differ in heavy-metal and mineral content. Identical nucleotide changes affected only two of these loci, indicating that introgression may have played a limited role in their evolution. Our results suggest that both allopatric diversification and (parapatric) ecological divergence shaped successive rounds of speciation in the Diospyros radiation on New Caledonia.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 1063-5157
fulltext: fulltext
issn:
  • 1063-5157
  • 1076-836X
url: Link


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titleProcesses Driving the Adaptive Radiation of a Tropical Tree (Diospyros, Ebenaceae) in New Caledonia, a Biodiversity Hotspot
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creatorPaun, Ovidiu ; Turner, Barbara ; Trucchi, Emiliano ; Munzinger, Jérôme ; Chase, Mark W ; Samuel, Rosabelle
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descriptionDue to its special geological history, the New Caledonian Archipelago is a mosaic of soil types, and in combination with climatic conditions this results in a heterogeneous environment across relatively small distances. A group of over 20 endemic species of Diospyros (Ebenaceae) has rapidly and recently radiated on the archipelago after a single long-distance dispersal event. Most of the Diospyros species in the radiating group are morphologically and ecologically well differentiated, but they exhibit low levels of DNA variability. To investigate the processes that shaped the diversification of this group we employed restriction site associated DNA sequencing (RADseq). Over 8400 filtered SNPs generally confirm species delimitations and produce a well-supported phylogenetic tree. Our analyses document local introgression, but only a limited potential for gene flow over longer distances. The phylogenetic relationships point to an early regional clustering among populations and species, indicating that allopatric speciation with respect to macrohabitat (i.e., climatic conditions) may have had a role in the initial differentiation within the group. A later, more rapid radiation involved divergence with respect to microhabitat (i.e., soil preference). Several sister species in the group show a parallel divergence in edaphic preference. Searches for genomic regions that are systematically differentiated in this replicated phenotypic divergence pointed to loci potentially involved in ion binding and cellular transport. These loci appear meaningful in the context of adaptations to soil types that differ in heavy-metal and mineral content. Identical nucleotide changes affected only two of these loci, indicating that introgression may have played a limited role in their evolution. Our results suggest that both allopatric diversification and (parapatric) ecological divergence shaped successive rounds of speciation in the Diospyros radiation on New Caledonia.
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subjectAdaptation, Physiological ; Adaptive radiation ; Biodiversity ; Biodiversity and Ecology ; Biological adaptation ; Biological diversity ; Botanics ; Diospyros ; Diospyros - classification ; Diospyros - physiology ; Dispersal ; DNA, Plant - genetics ; Dry forests ; Ebenaceae ; Ecology ; Ecology, environment ; Ecosystems ; Edaphic factors ; environment ; Environmental Sciences ; Evolution ; Genetic loci ; Genetic Speciation ; Genetic Variation ; Genome, Plant - genetics ; Geology ; Hybridization ; Life Sciences ; Morphology ; Mountain forests ; New Caledonia ; Phylogenetics ; Phylogeny ; RAD-sequencing ; Regular ; Regular Articles ; sequencing ; Soil - chemistry ; Soil adaptation ; Soils ; Speciation ; Systematics ; Systematics, Phylogenetics and taxonomy ; taxonomy ; Trees ; Tropical Climate ; Vegetal Biology
ispartofSystematic biology, 2016-03-01, Vol.65 (2), p.212-227
rights
0Copyright © 2016 Society of Systematic Biologists
1The Author(s) 2015. Published by Oxford University Press, on behalf of the Society of Systematic Biologists. 2015
2The Author(s) 2015. Published by Oxford University Press, on behalf of the Society of Systematic Biologists.
3Distributed under a Creative Commons Attribution 4.0 International License
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0Processes Driving the Adaptive Radiation of a Tropical Tree (Diospyros, Ebenaceae) in New Caledonia, a Biodiversity Hotspot
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descriptionDue to its special geological history, the New Caledonian Archipelago is a mosaic of soil types, and in combination with climatic conditions this results in a heterogeneous environment across relatively small distances. A group of over 20 endemic species of Diospyros (Ebenaceae) has rapidly and recently radiated on the archipelago after a single long-distance dispersal event. Most of the Diospyros species in the radiating group are morphologically and ecologically well differentiated, but they exhibit low levels of DNA variability. To investigate the processes that shaped the diversification of this group we employed restriction site associated DNA sequencing (RADseq). Over 8400 filtered SNPs generally confirm species delimitations and produce a well-supported phylogenetic tree. Our analyses document local introgression, but only a limited potential for gene flow over longer distances. The phylogenetic relationships point to an early regional clustering among populations and species, indicating that allopatric speciation with respect to macrohabitat (i.e., climatic conditions) may have had a role in the initial differentiation within the group. A later, more rapid radiation involved divergence with respect to microhabitat (i.e., soil preference). Several sister species in the group show a parallel divergence in edaphic preference. Searches for genomic regions that are systematically differentiated in this replicated phenotypic divergence pointed to loci potentially involved in ion binding and cellular transport. These loci appear meaningful in the context of adaptations to soil types that differ in heavy-metal and mineral content. Identical nucleotide changes affected only two of these loci, indicating that introgression may have played a limited role in their evolution. Our results suggest that both allopatric diversification and (parapatric) ecological divergence shaped successive rounds of speciation in the Diospyros radiation on New Caledonia.
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2Biodiversity
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5Biological diversity
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10Dispersal
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12Dry forests
13Ebenaceae
14Ecology
15Ecology, environment
16Ecosystems
17Edaphic factors
18environment
19Environmental Sciences
20Evolution
21Genetic loci
22Genetic Speciation
23Genetic Variation
24Genome, Plant - genetics
25Geology
26Hybridization
27Life Sciences
28Morphology
29Mountain forests
30New Caledonia
31Phylogenetics
32Phylogeny
33RAD-sequencing
34Regular
35Regular Articles
36sequencing
37Soil - chemistry
38Soil adaptation
39Soils
40Speciation
41Systematics
42Systematics, Phylogenetics and taxonomy
43taxonomy
44Trees
45Tropical Climate
46Vegetal Biology
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titleProcesses Driving the Adaptive Radiation of a Tropical Tree (Diospyros, Ebenaceae) in New Caledonia, a Biodiversity Hotspot
authorPaun, Ovidiu ; Turner, Barbara ; Trucchi, Emiliano ; Munzinger, Jérôme ; Chase, Mark W ; Samuel, Rosabelle
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issn1063-5157
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abstractDue to its special geological history, the New Caledonian Archipelago is a mosaic of soil types, and in combination with climatic conditions this results in a heterogeneous environment across relatively small distances. A group of over 20 endemic species of Diospyros (Ebenaceae) has rapidly and recently radiated on the archipelago after a single long-distance dispersal event. Most of the Diospyros species in the radiating group are morphologically and ecologically well differentiated, but they exhibit low levels of DNA variability. To investigate the processes that shaped the diversification of this group we employed restriction site associated DNA sequencing (RADseq). Over 8400 filtered SNPs generally confirm species delimitations and produce a well-supported phylogenetic tree. Our analyses document local introgression, but only a limited potential for gene flow over longer distances. The phylogenetic relationships point to an early regional clustering among populations and species, indicating that allopatric speciation with respect to macrohabitat (i.e., climatic conditions) may have had a role in the initial differentiation within the group. A later, more rapid radiation involved divergence with respect to microhabitat (i.e., soil preference). Several sister species in the group show a parallel divergence in edaphic preference. Searches for genomic regions that are systematically differentiated in this replicated phenotypic divergence pointed to loci potentially involved in ion binding and cellular transport. These loci appear meaningful in the context of adaptations to soil types that differ in heavy-metal and mineral content. Identical nucleotide changes affected only two of these loci, indicating that introgression may have played a limited role in their evolution. Our results suggest that both allopatric diversification and (parapatric) ecological divergence shaped successive rounds of speciation in the Diospyros radiation on New Caledonia.
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