10,000 years of vegetation history of the Aa palaeoestuary, St-Omer Basin, northern France

Gandouin, Emmanuel; Ponel, Philippe; Andrieu‐Ponel, Valérie; Guiter, Frédéric; Beaulieu, Jacques‐Louis de; Djamali, Morteza; Franquet, Évelyne; Vliët-Lanoé, Brigitte van; Alvitre, Maryse; Meurisse, Murielle; Brocandel, Marcel; Brulhet, Jacques

doi:10.1016/j.revpalbo.2009.03.008

Cited by 19 publications

(9 citation statements)

References 48 publications

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“…5). This period is also marked by a sharp increase of Chenopodiaceae, especially around 5300 cal BP, suggesting marine influences of the study site (Gandouin et al, 2009). Hydrological disturbances in the coastal area, and the consequent human retreat, can either be attributed to more frequent storms or to sea level rise.…”

Section: Forcing Factors Responsible For Human Settlement and Departumentioning

confidence: 81%

Climate variability and storm impacts as major drivers for human coastal marsh withdrawal over the Neolithic period (Southern Brittany, NW France)

Fernane

Penaud

Gandouin

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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International audienceRelationships between climate variations, vegetation dynamics, and early human activities during the Neolithic have been reconstructed from high-resolution pollen and foraminiferal records obtained from cores retrieved from coastal wetland located in southern Brittany (Guidel, NW France). Our data show that the area around Guidel corresponded to a dense temperate forest locally replaced by riparian forest in the marsh, without any human disturbance during the early Neolithic. During the mid-Neolithic, between 6500 and 5500 cal years BP, the first episode of probable human settlement is recorded, as suggested by the increase of anthropogenic plants. This early record of human impact is consistent with archeological studies that find a high concentration of funeral monuments around Guidel during this cultural period. This complex first phase is interrupted by the disappearance of anthropogenic influence coinciding with a cold/humid climate period in the region characterized by recurrent major storms. Then, at the transition between the middle to late Neolithic, at 5500 cal years BP, a second phase of human retreat is signaled by both vegetation dynamics and archeological records; this interval also coincides with a climatic deterioration marked by cold/humid conditions recorded in the region (Sorrel et al., 2012). The results of the present study imply that human settlement/departure over the Neolithic was probably influenced by climatic variations. During the Bronze Age, Iron Age, and Middle Ages, a progressive decline of the arboreal forest synchronous with an increase of anthropogenic plants, confirms the high and persistent human activity around the site. Furthermore, our results at Guidel suggest a different anthropogenic trend recorded between north and south Brittany. The human impact is well recorded during the Neolithic at Guidel, while in northern Brittany human settlement is not recorded before the Bronze Age, consistent with existing archeological data. (C) 2015 Elsevier B.V. All rights reserved

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Section: Forcing Factors Responsible For Human Settlement and Departumentioning

confidence: 81%

Climate variability and storm impacts as major drivers for human coastal marsh withdrawal over the Neolithic period (Southern Brittany, NW France)

Fernane

Penaud

Gandouin

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…a BP, whereas a similar deposit found at Tariec beach was dated to around 6850 cal. a BP at an elevation of −3.80 m NGF (Goslin et al 2013 (Van Geel et al 1996;Barber et al 2003Barber et al , 2004Magny 2004;Dark 2006;Gandouin et al 2009;Charman 2010;Swindles et al 2013;Tisdall et al 2013), characterized by colder and wetter climatic conditions, with increased rainfall and largely enhanced storminess (Van Geel et al 1996;Clarke & Rendell 2009). Major disruptions of coastal sedimentary environments were also identified all along the European coasts, either in the English Channel region (Long & Hughes 1995;Billeaud et al 2009;Sorrel et al 2009;Lespez et al 2010;Tessier et al 2012) or along the Atlantic coasts Clavé et al 2001;Moura et al 2007;Sorrel et al 2009).…”

Section: Salt-marsh Evolutionmentioning

confidence: 99%

Holocene salt‐marsh sedimentary infilling and relative sea‐level changes in West Brittany (France) using foraminifera‐based transfer functions

Stéphan

Goslin

Pailler

et al. 2014

Boreas

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International audienceIn order to reconstruct the former sea-levels and to better characterize the history of Holocene salt-marsh sedimentary infillings in West Brittany (western France), local foraminifera-based transfer functions were developed using Weighted-Average-Partial-Least-Squares (WA-PLS) regression, based on a modern dataset of 26 and 51 surface samples obtained from salt-marshes in both the bay of Tressseny and the bay of Brest. Fifty cores were retrieved from Tresseny, Porzguen, Troaon and Arun salt-marshes, which were litho- and biostratigraphicaly analyzed in order to reconstruct palaeoenvironmental changes. A total of 26 AMS 14C age determinations were performed within the sediment successions. The Holocene evolution of salt-marsh environments can be subdivided into four stages: (1) a development of brackish to freshwater marshes (from c. 6400 to 4500 cal. a BP); (2) salt-marsh formation behind gravel barriers in the bay of Brest (from 4500 to 2900 cal. a BP); (3) salt-marsh erosion and rapid changes of infilling dynamics due to the destruction of coastal barriers by storm events (c. 2900-2700 cal. a BP); (4) renewed salt-marsh deposition and small environmental changes (from 2700 cal. a BP to present). From the application of transfer functions to fossil assemblages, 14 new sea-level index points were obtained indicating a mean relative sea-level rise around 0.90±0.12 mm a-1 since 6300 cal. a BP

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“…Increased values of halophilous Chenopodiaceae pollen in coastal fluvio-deltaic complexes are a common feature of marine inundation phases (e.g. Gandouin et al 2009) which result in the formation of estuarine brackish marshes. A continued rise of sea water established a true marine environment (lower estuarine environment) at the site of BM1 at ca.…”

Section: Human Impacts On the Vegetation Of Nw Malta During The Earlymentioning

confidence: 99%

Vegetation dynamics during the early to mid-Holocene transition in NW Malta, human impact versus climatic forcing

Djamali

Gambin

Marriner

et al. 2012

Veget Hist Archaeobot

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10,000 years of vegetation history of the Aa palaeoestuary, St-Omer Basin, northern France

Cited by 19 publications

References 48 publications

Climate variability and storm impacts as major drivers for human coastal marsh withdrawal over the Neolithic period (Southern Brittany, NW France)

Climate variability and storm impacts as major drivers for human coastal marsh withdrawal over the Neolithic period (Southern Brittany, NW France)

Holocene salt‐marsh sedimentary infilling and relative sea‐level changes in West Brittany (France) using foraminifera‐based transfer functions

Vegetation dynamics during the early to mid-Holocene transition in NW Malta, human impact versus climatic forcing

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