New pollen evidence from Nariani (Georgia) for delayed postglacial forest expansion in the South Caucasus
Erwan Messager
(1)
,
Sébastien Nomade
(2, 3)
,
Bruno Wilhelm
(1, 4)
,
Sébastien Joannin
(5)
,
Vincent Scao
(2, 3)
,
Ulrich von Grafenstein
(2, 6, 7)
,
Inga Martkoplishvili
(8)
,
Vincent Ollivier
(9)
,
Ana Mgeladze
(8)
,
Jean-Pascal Dumoulin
(10, 2)
,
Arnaud Mazuy
(11)
,
Soumaya Belmecheri
(12)
,
David Lordkipanidze
(13)
1
EDYTEM -
Environnements, Dynamiques et Territoires de Montagne
2 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
3 PALEOCEAN - Paléocéanographie
4 OSUG - Observatoire des Sciences de l'Univers de Grenoble
5 UMR ISEM - Institut des Sciences de l'Evolution de Montpellier
6 GEOTRAC - Géochrononologie Traceurs Archéométrie
7 GLACCIOS - Glaces et Continents, Climats et Isotopes Stables
8 Georgian National Museum
9 LAMPEA - Laboratoire méditerranéen de préhistoire Europe-Afrique
10 LMC14 - UMS 2572 - Laboratoire de mesure du carbone 14
11 CEPAM - Culture et Environnements, Préhistoire, Antiquité, Moyen-Age
12 Laboratory of Tree-Ring Research
13 The National Museum of Georgia
2 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
3 PALEOCEAN - Paléocéanographie
4 OSUG - Observatoire des Sciences de l'Univers de Grenoble
5 UMR ISEM - Institut des Sciences de l'Evolution de Montpellier
6 GEOTRAC - Géochrononologie Traceurs Archéométrie
7 GLACCIOS - Glaces et Continents, Climats et Isotopes Stables
8 Georgian National Museum
9 LAMPEA - Laboratoire méditerranéen de préhistoire Europe-Afrique
10 LMC14 - UMS 2572 - Laboratoire de mesure du carbone 14
11 CEPAM - Culture et Environnements, Préhistoire, Antiquité, Moyen-Age
12 Laboratory of Tree-Ring Research
13 The National Museum of Georgia
Erwan Messager
- Fonction : Auteur
- PersonId : 8503
- IdHAL : erwan-messager
- ORCID : 0000-0001-5192-9088
- IdRef : 116470410
Sébastien Joannin
- Fonction : Auteur
- PersonId : 19986
- IdHAL : sebastien-joannin
- ORCID : 0000-0001-8345-9252
- IdRef : 11417038X
Vincent Ollivier
- Fonction : Auteur
- PersonId : 753184
- IdHAL : vincent-ollivier-cnrs
- ORCID : 0000-0002-4326-6891
- IdRef : 112254934
Arnaud Mazuy
- Fonction : Auteur
- PersonId : 751586
- IdHAL : arnaud-mazuy
Résumé
The nature and timing of environmental changes throughout the last glacial-interglacial transition in the South Caucasus, and more widely in eastern Europe, are still not fully understood. According to certain pollen records, forest expansion occurred in many areas several millennia after what is considered worldwide as the onset of the Holocene. The current problem we face is that the time lag in forest expansion varies from one sequence to another, sometimes with no delay at all. Moreover, the potential forcing/controlling factors behind this complex pattern, contrary to the almost synchronous global Holocene warming, are still a matter for debate. Accordingly, we revisit the issue of forest expansion through vegetation history obtained in the South Caucasus using a new pollen record, retrieved from the Nariani paleolake (South Georgia). These data attest to a steppic phase, initially dominated by Amaranthaceae-Chenopodiaceae (12,700–10,500 cal yr BP), then by Poaceae (10,500–9000 cal yr BP), culminating with a more forested phase (9000–5000 calyrBP). Although some palaeoclimatic regional reconstructions show a wet early Holocene, we interpret the delay in forest expansion recorded in Nariani (2500 years) as the result of reduced spring precipitation, which would have limited forest development at that time.
Format du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
New pollen evidence from Nariani (Georgia) for delayed postglacial forest expansion in the South Caucasus
|
Résumé |
en
The nature and timing of environmental changes throughout the last glacial-interglacial transition in the South Caucasus, and more widely in eastern Europe, are still not fully understood. According to certain pollen records, forest expansion occurred in many areas several millennia after what is considered worldwide as the onset of the Holocene. The current problem we face is that the time lag in forest expansion varies from one sequence to another, sometimes with no delay at all. Moreover, the potential forcing/controlling factors behind this complex pattern, contrary to the almost synchronous global Holocene warming, are still a matter for debate. Accordingly, we revisit the issue of forest expansion through vegetation history obtained in the South Caucasus using a new pollen record, retrieved from the Nariani paleolake (South Georgia). These data attest to a steppic phase, initially dominated by Amaranthaceae-Chenopodiaceae (12,700–10,500 cal yr BP), then by Poaceae (10,500–9000 cal yr BP), culminating with a more forested phase (9000–5000 calyrBP). Although some palaeoclimatic regional reconstructions show a wet early Holocene, we interpret the delay in forest expansion recorded in Nariani (2500 years) as the result of reduced spring precipitation, which would have limited forest development at that time.
|
Auteur(s) |
Erwan Messager
1
, Sébastien Nomade
2, 3
, Bruno Wilhelm
1, 4
, Sébastien Joannin
5
, Vincent Scao
2, 3
, Ulrich von Grafenstein
2, 6, 7
, Inga Martkoplishvili
8
, Vincent Ollivier
9
, Ana Mgeladze
8
, Jean-Pascal Dumoulin
10, 2
, Arnaud Mazuy
11
, Soumaya Belmecheri
12
, David Lordkipanidze
13
1
EDYTEM -
Environnements, Dynamiques et Territoires de Montagne
( 20150 )
- Université de Savoie, Campus scientifique, 73376 Le Bourget du Lac cedex
- France
2
LSCE -
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
( 518 )
- Bât. 12,
avenue de la Terrasse,
F-91198 GIF-SUR-YVETTE CEDEX
- France
3
PALEOCEAN -
Paléocéanographie
( 1007946 )
-
LSCE. CEA Paris-Saclay. Orme des merisiers. 91190 Saint-Aubin.
- France
4
OSUG -
Observatoire des Sciences de l'Univers de Grenoble
( 1043796 )
- 414 Rue de la piscine - BP 53 38041 GRENOBLE CEDEX 9
- France
5
UMR ISEM -
Institut des Sciences de l'Evolution de Montpellier
( 29770 )
- Place E. Bataillon CC 064 34095 Montpellier Cedex 05
- France
6
GEOTRAC -
Géochrononologie Traceurs Archéométrie
( 578523 )
- LSCE. CEA Paris-Saclay. Orme des merisiers. 91190 Saint-Aubin.
- France
7
GLACCIOS -
Glaces et Continents, Climats et Isotopes Stables
( 1007944 )
- LSCE. CEA Paris-Saclay. Orme des merisiers. 91190 Saint-Aubin.
- France
8
Georgian National Museum
( 424849 )
- 3 Rustaveli Avenue, 0105 Tbilisi,
- Géorgie
9
LAMPEA -
Laboratoire méditerranéen de préhistoire Europe-Afrique
( 208163 )
- MMSH 5 Rue du château de l'Horloge BP 647 13094 AIX EN PROVENCE CEDEX 2
- France
10
LMC14 - UMS 2572 -
Laboratoire de mesure du carbone 14
( 1881 )
- Bâtiment 450 - Porte 4E CEA Saclay 91191 GIF SUR YVETTE CEDEX
- France
11
CEPAM -
Culture et Environnements, Préhistoire, Antiquité, Moyen-Age
( 199355 )
- Université Côte d'Azur Pôle universitaire Saint-Jean-d'Angély - SJA3 24, avenue des Diables Bleus 06357 Nice Cedex 4
- France
12
Laboratory of Tree-Ring Research
( 519083 )
- États-Unis
13
The National Museum of Georgia
( 111641 )
- 3 Purtseladze St., 0107 Tbilissi
- Géorgie
|
Licence |
Paternité - Pas d'utilisation commerciale - Pas de modification
|
Public visé |
Scientifique
|
Langue du document |
Anglais
|
Nom de la revue |
|
Vulgarisation |
Non
|
Date de publication |
2017
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication électronique |
2017-02-06
|
Volume |
87
|
Numéro |
1
|
Page/Identifiant |
121 - 132
|
Domaine(s) |
|
Mots-clés |
en
South Caucasus, Paleolake, Forest expansion, Early Holocene
|
DOI | 10.1017/qua.2016.3 |
Origine :
Accord explicite pour ce dépôt
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