The loss of biodiversity in Madagascar is contemporaneous with major demographic events
Omar Alva
(1)
,
Anaïs Leroy
(1)
,
Margit Heiske
(1)
,
Veronica Pereda-Loth
(1)
,
Lenka Tisseyre
(1)
,
Anne Boland
(2, 3)
,
Jean-François Deleuze
(2, 3)
,
Jorge Rocha
(4, 5)
,
Carina Schlebusch
(6)
,
Cesar Fortes-Lima
(6)
,
Mark Stoneking
(7, 8)
,
Chantal Radimilahy
(9)
,
Jean-Aimé Rakotoarisoa
(9)
,
Thierry Letellier
(1)
,
Denis Pierron
(1)
1
EVOLSAN -
Évolution et Santé Orale
2 CNRGH - Centre National de Recherche en Génomique Humaine
3 IG - Institut de Génomique d'Evry
4 CIBIO - Centro de Investigação em Biodiversidade e Recursos Genéticos [Vairao]
5 FCUP - Faculdade de Ciências da Universidade do Porto
6 EBC - Evolutionary Biology Centre
7 BPGE - Bioinformatique, phylogénie et génomique évolutive
8 LBBE - Laboratoire de Biométrie et Biologie Evolutive - UMR 5558
9 Université d'Antananarivo
2 CNRGH - Centre National de Recherche en Génomique Humaine
3 IG - Institut de Génomique d'Evry
4 CIBIO - Centro de Investigação em Biodiversidade e Recursos Genéticos [Vairao]
5 FCUP - Faculdade de Ciências da Universidade do Porto
6 EBC - Evolutionary Biology Centre
7 BPGE - Bioinformatique, phylogénie et génomique évolutive
8 LBBE - Laboratoire de Biométrie et Biologie Evolutive - UMR 5558
9 Université d'Antananarivo
Cesar Fortes-Lima
- Fonction : Auteur
- PersonId : 745520
- IdHAL : cesar-fortes-lima
- ORCID : 0000-0002-2647-6256
- IdRef : 195653629
Résumé
Only 400 km off the coast of East Africa, the island of Madagascar is one of the last large land masses to have been colonized by humans. While many questions surround the human occupation of Madagascar, recent studies raise the question of human impact on endemic biodiversity and landscape transformation. Previous genetic and linguistic analyses have shown that the Malagasy population has emerged from an admixture that happened during the last millennium, between Bantu-speaking African populations and Austronesianspeaking Asian populations. By studying the sharing of chromosome segments between individuals (IBD determination), local ancestry information and simulated genetic data, we inferred that the Malagasy ancestral Asian population was isolated for more than 1000 years with an effective size of just a few hundred individuals. This isolation ended around 1000 years before present (BP) by admixture with a small African population. Around the admixture time, there was a rapid demographic expansion due to intrinsic population growth of the newly admixed population, which coincides with extensive changes in Madagascar’s landscape and the extinction of all endemic large-bodied vertebrates. Therefore, our approach can provide new insights into past human demography and associated impacts on ecosystems
Domaines
Anthropologie biologiqueFormat du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Résumé |
en
Only 400 km off the coast of East Africa, the island of Madagascar is one of the last large land masses to have been colonized by humans. While many questions surround the human occupation of Madagascar, recent studies raise the question of human impact on endemic biodiversity and landscape transformation. Previous genetic and linguistic analyses have shown that the Malagasy population has emerged from an admixture that happened during the last millennium, between Bantu-speaking African populations and Austronesianspeaking Asian populations. By studying the sharing of chromosome segments between individuals (IBD determination), local ancestry information and simulated genetic data, we inferred that the Malagasy ancestral Asian population was isolated for more than 1000 years with an effective size of just a few hundred individuals. This isolation ended around 1000 years before present (BP) by admixture with a small African population. Around the admixture time, there was a rapid demographic expansion due to intrinsic population growth of the newly admixed population, which coincides with extensive changes in Madagascar’s landscape and the extinction of all endemic large-bodied vertebrates. Therefore, our approach can provide new insights into past human demography and associated impacts on ecosystems
|
Titre |
en
The loss of biodiversity in Madagascar is contemporaneous with major demographic events
|
Auteur(s) |
Omar Alva
1
, Anaïs Leroy
1
, Margit Heiske
1
, Veronica Pereda-Loth
1
, Lenka Tisseyre
1
, Anne Boland
2, 3
, Jean-François Deleuze
2, 3
, Jorge Rocha
4, 5
, Carina Schlebusch
6
, Cesar Fortes-Lima
6
, Mark Stoneking
7, 8
, Chantal Radimilahy
9
, Jean-Aimé Rakotoarisoa
9
, Thierry Letellier
1
, Denis Pierron
1
1
EVOLSAN -
Évolution et Santé Orale
( 1061861 )
- Toulouse
- France
2
CNRGH -
Centre National de Recherche en Génomique Humaine
( 557361 )
- Evry
- France
3
IG -
Institut de Génomique d'Evry
( 40508 )
- 2 rue Gaston Crémieux CP5706 91057 EVRY CEDEX
- France
4
CIBIO -
Centro de Investigação em Biodiversidade e Recursos Genéticos [Vairao]
( 232030 )
- Universidade do Porto, Campus Agrario de Vairão
Rua Padre Armando Quintas, nº 7
4485-661 Vairão
Portugal
- Portugal
5
FCUP -
Faculdade de Ciências da Universidade do Porto
( 446063 )
- Rua do Campo Alegre, 4169-007 Porto
- Portugal
6
EBC -
Evolutionary Biology Centre
( 194502 )
- Evolutionary Biology Centre, EBC Norbyvägen 14-18 752 36 Uppsala
- Suède
7
BPGE -
Bioinformatique, phylogénie et génomique évolutive
( 543493 )
- LBBE
43 Bld du 11 Novembre 1918 69622 VILLEURBANNE CEDEX
- France
8
LBBE -
Laboratoire de Biométrie et Biologie Evolutive - UMR 5558
( 10025 )
- 43 Bld du 11 Novembre 1918 69622 VILLEURBANNE CEDEX
- France
9
Université d'Antananarivo
( 300866 )
- BP 566 - Antananarivo 101 - Madagascar
- Madagascar
|
URL éditeur |
https://www.sciencedirect.com/science/article/pii/S0960982222016025
|
Langue du document |
Anglais
|
Nom de la revue |
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2022-12
|
Volume |
32
|
Numéro |
23
|
Page/Identifiant |
4997-5007.e5
|
Projet(s) ANR |
|
Domaine(s) |
|
DOI | 10.1016/j.cub.2022.09.060 |
Fichier principal
13sept_manuscript.pdf ( 484.87 Ko
)
Télécharger
13sept_supplementary.pdf ( 1.17 Mo
)
Télécharger
Supplementary_DATA_1.xlsx ( 38.15 Ko
)
Télécharger
Origine :
Fichiers produits par l'(les) auteur(s)
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