The impact of climate changes during the Holocene on vegetation in northern French Guiana
Vincent Freycon
(1)
,
Marion Krenker
(2)
,
Dominique Schwartz
(2)
,
Robert Nasi
(3)
,
Damien Bonal
(4)
Damien Bonal
- Fonction : Auteur
- PersonId : 184161
- IdHAL : damien-bonal
- ORCID : 0000-0001-9602-8603
- IdRef : 145309525
Résumé
The impact of climatic changes that occurred during the last glacial maximum and the Holocene on vegetation changes in the Amazon Basin and the Guiana Shield are still widely debated. The aim of our study was to investigate whether major changes in vegetation (i.e. transitions between rainforests and C4 savannas) occurred in northern French Guiana during the Holocene. We measured variations in the δ13C of soil organic matter at eight sites now occupied by forest or savannah. The forest sites were selected to cover two regions (forest refugia and peneplains) which are thought to have experienced different intensities of disturbance during the latest Pleistocene and the Holocene. We found that none of the forest sites underwent major disturbances during the Holocene, i.e. they were not replaced by C4 savannahs or C4 forest savannahs for long periods. Our results thus suggest that tropical rainforests in northern French Guiana were resilient to drier climatic conditions during the Holocene. Nevertheless, geographical and vertical variations in the 13C of SOM were compatible with minor changes in vegetation, variations in soil processes or in soil physical properties.
Domaines
GéographieFormat du dépôt | Notice |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
The impact of climate changes during the Holocene on vegetation in northern French Guiana
|
Résumé |
en
The impact of climatic changes that occurred during the last glacial maximum and the Holocene on vegetation changes in the Amazon Basin and the Guiana Shield are still widely debated. The aim of our study was to investigate whether major changes in vegetation (i.e. transitions between rainforests and C4 savannas) occurred in northern French Guiana during the Holocene. We measured variations in the δ13C of soil organic matter at eight sites now occupied by forest or savannah. The forest sites were selected to cover two regions (forest refugia and peneplains) which are thought to have experienced different intensities of disturbance during the latest Pleistocene and the Holocene. We found that none of the forest sites underwent major disturbances during the Holocene, i.e. they were not replaced by C4 savannahs or C4 forest savannahs for long periods. Our results thus suggest that tropical rainforests in northern French Guiana were resilient to drier climatic conditions during the Holocene. Nevertheless, geographical and vertical variations in the 13C of SOM were compatible with minor changes in vegetation, variations in soil processes or in soil physical properties.
|
Auteur(s) |
Vincent Freycon
1
, Marion Krenker
2
, Dominique Schwartz
2
, Robert Nasi
3
, Damien Bonal
4
1
UR Dynamique forestière
( 136884 )
- Campus de Baillarguet, TA C-37, F-34398 Montpellier cedex 5
- France
2
LIVE -
Laboratoire Image, Ville, Environnement
( 441830 )
- 3 Rue de l'Argonne, 67000 STRASBOURG
- France
3
CIFOR -
Center for International Forestry Research
( 59818 )
- CIFOR Headquarters
Jalan CIFOR
Situ Gede, Bogor Barat,
Bogor 16115,
Jawa Barat, Indonesia
- Indonésie
4
ECOFOG -
Ecologie des forêts de Guyane
( 467444 )
- 745 BP 709 - F-97387 Kourou Cedex France
- Guyane française
|
Comité de lecture |
Oui
|
Vulgarisation |
Non
|
Langue du document |
Anglais
|
Nom de la revue |
|
Date de production/écriture |
2008
|
Audience |
Non spécifiée
|
Date de publication |
2010
|
Volume |
73
|
Numéro |
2
|
Page/Identifiant |
220-225
|
Commentaire |
URL de l'article : http://www.sciencedirect.com/science/article/B6WPN-4XY3KDK-2/2/fd8508af63d82e29b4f9829c65194e26
|
Public visé |
Scientifique
|
Voir aussi |
|
Financement |
|
Dispositif contributeur |
|
Domaine(s) |
|
Indexation contrôlée |
|
Mots-clés |
fr
holocene, vegetation change, French Guiana, carbon isotope composition, soil organique matter
|
DOI | 10.1016/j.yqres.2009.11.007 |
ProdINRA | 46084 |
UT key WOS | 000275246700007 |
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