Tracking long-term human impacts on landscape, vegetal biodiversity and water quality in the lake Aydat catchment (Auvergne, France) using pollen, non-pollen palynomorphs and diatom assemblages

Yannick Miras, Aude Beauger, Marlène Lavrieux , Vincent Berthon, Karen Serieyssol, Valérie Andrieu-ponel, Paul M. Ledger

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Palaeoenvironmental studies allow the assessment of long-term human-climate-environmental interactions, and furnish valuable tools for the sustainable management of lacustrine ecosystems. A good example is the multi-proxy studythat of Lake Aydat’s 19 m sedimentary core. Previous research revealed the role of climate and human activities on lake sedimentation, and identified two sedimentary units (6700 ± 200 to 3180 ± 90 and 1770 ± 60 cal. yr BP to present) separated by an erosive mass-wasting deposit (Lavrieux et al., 2013a). Pollen, non-pollen palynomorphs (e.g. fungal and algal spores, rotifer resting eggs), and diatom-based trophic reconstructionshave been used to track the impacts of past land use on landscape evolution, vegetal biodiversity and water quality. Palaeoenvironmental data were also compared with local archaeo-historical datasets which allowed refined landscape reconstructions, especially for late Antiquity. The results obtained demonstrate that even Neolithic and Bronze Age human activities (between ca 4600 and 4300 cal. yr BP and between ca 3900 and 3500 cal. yr BP) had a discernible influence on catchment vegetation and lacustrine trophic dynamics of Lake Aydat, underlining the vulnerability of the ecosystem. Recurrent and complex models of past vegetation changes, phases of water nutrient over-enrichment and lake resilience were identified and related to grazing activities, but also to land use practises, which have been overlooked in Auvergne, such as mountain agriculture and hemp retting.
Original languageEnglish
Pages (from-to)76-90
Number of pages15
JournalPalaeogeography Palaeoclimatology Palaeoecology
Volume424
Early online date18 Feb 2015
DOIs
Publication statusPublished - 15 Apr 2015

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Bacillariophyceae
anthropogenic effect
anthropogenic activities
diatom
pollen
water quality
France
catchment
biodiversity
lakes
lake
human activity
land use
retting
climate
hemp
vegetation
mass wasting
Bronze Age
landscape evolution

Keywords

  • lake water quality
  • eutrophication
  • human impact
  • pollen
  • Anabaena
  • Rotifer resting eggs
  • diatom-inferred trophic level

Cite this

Tracking long-term human impacts on landscape, vegetal biodiversity and water quality in the lake Aydat catchment (Auvergne, France) using pollen, non-pollen palynomorphs and diatom assemblages. / Miras, Yannick; Beauger, Aude; Lavrieux , Marlène ; Berthon, Vincent; Serieyssol, Karen; Andrieu-ponel, Valérie; Ledger, Paul M.

In: Palaeogeography Palaeoclimatology Palaeoecology, Vol. 424, 15.04.2015, p. 76-90.

Research output: Contribution to journalArticle

Miras, Yannick ; Beauger, Aude ; Lavrieux , Marlène ; Berthon, Vincent ; Serieyssol, Karen ; Andrieu-ponel, Valérie ; Ledger, Paul M. / Tracking long-term human impacts on landscape, vegetal biodiversity and water quality in the lake Aydat catchment (Auvergne, France) using pollen, non-pollen palynomorphs and diatom assemblages. In: Palaeogeography Palaeoclimatology Palaeoecology. 2015 ; Vol. 424. pp. 76-90.
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abstract = "Palaeoenvironmental studies allow the assessment of long-term human-climate-environmental interactions, and furnish valuable tools for the sustainable management of lacustrine ecosystems. A good example is the multi-proxy studythat of Lake Aydat’s 19 m sedimentary core. Previous research revealed the role of climate and human activities on lake sedimentation, and identified two sedimentary units (6700 ± 200 to 3180 ± 90 and 1770 ± 60 cal. yr BP to present) separated by an erosive mass-wasting deposit (Lavrieux et al., 2013a). Pollen, non-pollen palynomorphs (e.g. fungal and algal spores, rotifer resting eggs), and diatom-based trophic reconstructionshave been used to track the impacts of past land use on landscape evolution, vegetal biodiversity and water quality. Palaeoenvironmental data were also compared with local archaeo-historical datasets which allowed refined landscape reconstructions, especially for late Antiquity. The results obtained demonstrate that even Neolithic and Bronze Age human activities (between ca 4600 and 4300 cal. yr BP and between ca 3900 and 3500 cal. yr BP) had a discernible influence on catchment vegetation and lacustrine trophic dynamics of Lake Aydat, underlining the vulnerability of the ecosystem. Recurrent and complex models of past vegetation changes, phases of water nutrient over-enrichment and lake resilience were identified and related to grazing activities, but also to land use practises, which have been overlooked in Auvergne, such as mountain agriculture and hemp retting.",
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note = "Acknowledgements This study was supported by the Erode project funded by the INSU/CNRS (AP EC2CO 2009) and we thank ARTEMIS programme for AMS radiocarbon dating. Many thanks also to all the contributors to the Erode project. Finally we would like to thank Dr E. Roussel and Dr D. Latour who took the photographs and G. Charrier who drew the map. This manuscript has also benefitted from the comments of one anonymous reviewer and of Dr S. Leroy (Brunel University London).",
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AU - Miras, Yannick

AU - Beauger, Aude

AU - Lavrieux , Marlène

AU - Berthon, Vincent

AU - Serieyssol, Karen

AU - Andrieu-ponel, Valérie

AU - Ledger, Paul M.

N1 - Acknowledgements This study was supported by the Erode project funded by the INSU/CNRS (AP EC2CO 2009) and we thank ARTEMIS programme for AMS radiocarbon dating. Many thanks also to all the contributors to the Erode project. Finally we would like to thank Dr E. Roussel and Dr D. Latour who took the photographs and G. Charrier who drew the map. This manuscript has also benefitted from the comments of one anonymous reviewer and of Dr S. Leroy (Brunel University London).

PY - 2015/4/15

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N2 - Palaeoenvironmental studies allow the assessment of long-term human-climate-environmental interactions, and furnish valuable tools for the sustainable management of lacustrine ecosystems. A good example is the multi-proxy studythat of Lake Aydat’s 19 m sedimentary core. Previous research revealed the role of climate and human activities on lake sedimentation, and identified two sedimentary units (6700 ± 200 to 3180 ± 90 and 1770 ± 60 cal. yr BP to present) separated by an erosive mass-wasting deposit (Lavrieux et al., 2013a). Pollen, non-pollen palynomorphs (e.g. fungal and algal spores, rotifer resting eggs), and diatom-based trophic reconstructionshave been used to track the impacts of past land use on landscape evolution, vegetal biodiversity and water quality. Palaeoenvironmental data were also compared with local archaeo-historical datasets which allowed refined landscape reconstructions, especially for late Antiquity. The results obtained demonstrate that even Neolithic and Bronze Age human activities (between ca 4600 and 4300 cal. yr BP and between ca 3900 and 3500 cal. yr BP) had a discernible influence on catchment vegetation and lacustrine trophic dynamics of Lake Aydat, underlining the vulnerability of the ecosystem. Recurrent and complex models of past vegetation changes, phases of water nutrient over-enrichment and lake resilience were identified and related to grazing activities, but also to land use practises, which have been overlooked in Auvergne, such as mountain agriculture and hemp retting.

AB - Palaeoenvironmental studies allow the assessment of long-term human-climate-environmental interactions, and furnish valuable tools for the sustainable management of lacustrine ecosystems. A good example is the multi-proxy studythat of Lake Aydat’s 19 m sedimentary core. Previous research revealed the role of climate and human activities on lake sedimentation, and identified two sedimentary units (6700 ± 200 to 3180 ± 90 and 1770 ± 60 cal. yr BP to present) separated by an erosive mass-wasting deposit (Lavrieux et al., 2013a). Pollen, non-pollen palynomorphs (e.g. fungal and algal spores, rotifer resting eggs), and diatom-based trophic reconstructionshave been used to track the impacts of past land use on landscape evolution, vegetal biodiversity and water quality. Palaeoenvironmental data were also compared with local archaeo-historical datasets which allowed refined landscape reconstructions, especially for late Antiquity. The results obtained demonstrate that even Neolithic and Bronze Age human activities (between ca 4600 and 4300 cal. yr BP and between ca 3900 and 3500 cal. yr BP) had a discernible influence on catchment vegetation and lacustrine trophic dynamics of Lake Aydat, underlining the vulnerability of the ecosystem. Recurrent and complex models of past vegetation changes, phases of water nutrient over-enrichment and lake resilience were identified and related to grazing activities, but also to land use practises, which have been overlooked in Auvergne, such as mountain agriculture and hemp retting.

KW - lake water quality

KW - eutrophication

KW - human impact

KW - pollen

KW - Anabaena

KW - Rotifer resting eggs

KW - diatom-inferred trophic level

U2 - 10.1016/j.palaeo.2015.02.016

DO - 10.1016/j.palaeo.2015.02.016

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EP - 90

JO - Palaeogeography Palaeoclimatology Palaeoecology

JF - Palaeogeography Palaeoclimatology Palaeoecology

SN - 0031-0182

ER -