Palynological evidence for environmental and climatic change in the lower Guadiana valley, Portugal, during the last 13 000 years
Pollen analysis of a 48 m AMS radiocarbon-dated sediment sequence from the Guadiana estuary provides the first record of Lateglacial and Holocene vegetation history in the Algarve province of Portugal. This paper focuses on the record of terrestrial pollen taxa, which document a series of forest exp...
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Online Access: | http://hdl.handle.net/10400.1/2638 https://doi.org/10.1177/0959683607077027 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/2638 2023-05-15T17:35:15+02:00 Palynological evidence for environmental and climatic change in the lower Guadiana valley, Portugal, during the last 13 000 years Fletcher, William Boski, T. Moura, Delminda 2007 http://hdl.handle.net/10400.1/2638 https://doi.org/10.1177/0959683607077027 eng eng SAGE Publications http://hdl.handle.net/10400.1/2638 http://dx.doi.org/10.1177/0959683607077027 restrictedAccess Pollen analysis Palaeoecology Lateglacial Holocene Climate change Aridification article 2007 ftunivalgarve https://doi.org/10.1177/0959683607077027 2022-05-30T08:45:23Z Pollen analysis of a 48 m AMS radiocarbon-dated sediment sequence from the Guadiana estuary provides the first record of Lateglacial and Holocene vegetation history in the Algarve province of Portugal. This paper focuses on the record of terrestrial pollen taxa, which document a series of forest expansions and declines during the period 13 000 cal. BP to 1600 cal. BP and provide insights into climate evolution in southwestern Iberia. The main vegetation phases identified in the Guadiana valley are (1) Lateglacial interstadial (Allerød) forest with Quercus and Pinus under a temperate, moist, continental climate; (2) a Younger Dryas forest decline (Quercus) and expansion of pinewoods, xeric scrub and open ground habitats (with Juniperus, Artemisia, Ephedra distachya type, Centaurea scabiosa type) under arid and cold conditions; (3) an early Holocene forest/scrub/open-ground vegetation mosaic developing under a warm, dry and continental climate; (4) a maximum of Quercus forest and thermomediterranean evergreen taxa (Olea, Phillyrea, Pistacia) reflecting a warm, moist oceanic climate between c. 9000 cal. BP and c. 5000 cal. BP; and (5) the expansion of shrublands with Cistaceae and Ericaceae under a drier climatic regime and increasing anthropogenic activity since c. 5000 cal. BP. Holocene episodes of maximum climatic aridity are identified in the record of xerophytic taxa (Juniperus, Artemisia, Ephedra distachya type) centred around 10 200 cal. BP, 7800 cal. BP, 4800 cal. BP, 3100 cal. BP and 1700 cal. BP. Regional comparisons suggest a correlation of arid phases across southern Iberia and northwest Africa, which can be related to abrupt North Atlantic coolings (Bond events). Research Council studentship for WJF (NERC/S/A/2001/06109), with the support of Trinity College and the Department of Geography, University of Cambridge Article in Journal/Newspaper North Atlantic Universidade do Algarve: Sapienta The Holocene 17 4 481 494 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Pollen analysis Palaeoecology Lateglacial Holocene Climate change Aridification |
spellingShingle |
Pollen analysis Palaeoecology Lateglacial Holocene Climate change Aridification Fletcher, William Boski, T. Moura, Delminda Palynological evidence for environmental and climatic change in the lower Guadiana valley, Portugal, during the last 13 000 years |
topic_facet |
Pollen analysis Palaeoecology Lateglacial Holocene Climate change Aridification |
description |
Pollen analysis of a 48 m AMS radiocarbon-dated sediment sequence from the Guadiana estuary provides the first record of Lateglacial and Holocene vegetation history in the Algarve province of Portugal. This paper focuses on the record of terrestrial pollen taxa, which document a series of forest expansions and declines during the period 13 000 cal. BP to 1600 cal. BP and provide insights into climate evolution in southwestern Iberia. The main vegetation phases identified in the Guadiana valley are (1) Lateglacial interstadial (Allerød) forest with Quercus and Pinus under a temperate, moist, continental climate; (2) a Younger Dryas forest decline (Quercus) and expansion of pinewoods, xeric scrub and open ground habitats (with Juniperus, Artemisia, Ephedra distachya type, Centaurea scabiosa type) under arid and cold conditions; (3) an early Holocene forest/scrub/open-ground vegetation mosaic developing under a warm, dry and continental climate; (4) a maximum of Quercus forest and thermomediterranean evergreen taxa (Olea, Phillyrea, Pistacia) reflecting a warm, moist oceanic climate between c. 9000 cal. BP and c. 5000 cal. BP; and (5) the expansion of shrublands with Cistaceae and Ericaceae under a drier climatic regime and increasing anthropogenic activity since c. 5000 cal. BP. Holocene episodes of maximum climatic aridity are identified in the record of xerophytic taxa (Juniperus, Artemisia, Ephedra distachya type) centred around 10 200 cal. BP, 7800 cal. BP, 4800 cal. BP, 3100 cal. BP and 1700 cal. BP. Regional comparisons suggest a correlation of arid phases across southern Iberia and northwest Africa, which can be related to abrupt North Atlantic coolings (Bond events). Research Council studentship for WJF (NERC/S/A/2001/06109), with the support of Trinity College and the Department of Geography, University of Cambridge |
format |
Article in Journal/Newspaper |
author |
Fletcher, William Boski, T. Moura, Delminda |
author_facet |
Fletcher, William Boski, T. Moura, Delminda |
author_sort |
Fletcher, William |
title |
Palynological evidence for environmental and climatic change in the lower Guadiana valley, Portugal, during the last 13 000 years |
title_short |
Palynological evidence for environmental and climatic change in the lower Guadiana valley, Portugal, during the last 13 000 years |
title_full |
Palynological evidence for environmental and climatic change in the lower Guadiana valley, Portugal, during the last 13 000 years |
title_fullStr |
Palynological evidence for environmental and climatic change in the lower Guadiana valley, Portugal, during the last 13 000 years |
title_full_unstemmed |
Palynological evidence for environmental and climatic change in the lower Guadiana valley, Portugal, during the last 13 000 years |
title_sort |
palynological evidence for environmental and climatic change in the lower guadiana valley, portugal, during the last 13 000 years |
publisher |
SAGE Publications |
publishDate |
2007 |
url |
http://hdl.handle.net/10400.1/2638 https://doi.org/10.1177/0959683607077027 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://hdl.handle.net/10400.1/2638 http://dx.doi.org/10.1177/0959683607077027 |
op_rights |
restrictedAccess |
op_doi |
https://doi.org/10.1177/0959683607077027 |
container_title |
The Holocene |
container_volume |
17 |
container_issue |
4 |
container_start_page |
481 |
op_container_end_page |
494 |
_version_ |
1766134349325926400 |