A5026601956- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Pleistocene-Era Hominins and Archaeology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Archaeology and ancient environmental studies
- Marine and coastal ecosystems
- Geological formations and processes
- Tree-ring climate responses
- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Fire effects on ecosystems
- Marine and environmental studies
- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Freshwater macroinvertebrate diversity and ecology
- Aeolian processes and effects
- Environmental DNA in Biodiversity Studies
- Atmospheric and Environmental Gas Dynamics
- Protist diversity and phylogeny
- Soil erosion and sediment transport
- Maritime and Coastal Archaeology
- Coral and Marine Ecosystems Studies
- French Urban and Social Studies
- Medieval European Literature and History
- Paleontology and Stratigraphy of Fossils
Université de franche-comté
2010-2024
Centre National de la Recherche Scientifique
2015-2024
Laboratoire Chrono-Environnement
2014-2024
Université de Bourgogne
2016-2024
Université Marie et Louis Pasteur
2021-2023
Institut de Recherche pour le Développement
2016-2023
Université Bourgogne Franche-Comté
2015-2022
Ifremer
2020-2022
Institut de Recherche pour le Développement
2018-2022
Université Savoie Mont Blanc
2007-2021
Abstract. On the basis of a multi-proxy approach and strategy combining lacustrine marine records along north–south transect, data collected in central Mediterranean within framework collaborative project have led to reconstruction high-resolution well-dated palaeohydrological assessment their spatial temporal coherency. Contrasting patterns changes been evidenced Mediterranean: south (north) around 40° N latitude, middle part Holocene was characterised by lake-level maxima (minima), during...
Abstract Long-term time series have provided evidence that anthropogenic pressures can threaten lakes. Yet it remains unclear how and the extent to which lake biodiversity has changed during Anthropocene, in particular for microbes. Here, we used DNA preserved sediments compare modern micro-eukaryotic communities with those from end of 19th century, i.e., before acceleration human imprint on ecosystems. Our results obtained 48 lakes indicate drastic changes composition microbial communities,...
Abstract A chironomid–July air temperature inference model based on chironomid assemblages in the surface sediments of 81 Swiss lakes was used to reconstruct Late Glacial July temperatures at Lac Lautrey (Jura, Eastern France). The transfer‐function weighted averaging–partial least squares (WA‐PLS) regression and featured a leave‐one‐out cross‐validated coefficient determination ( r 2 ) 0.80, root mean square error prediction (RMSEP) 1.53 ° C, applied record consisting 154 samples covering...
Abstract High-temporal resolution analyses of pollen, chironomid, and lake-level records from Lake Lautrey provide multi-proxy, quantitative estimates climatic change during the Late-Glacial period in eastern France. Past temperature moisture parameters were estimated using modern analogues ‘plant functional types’ transfer-function methods for three pollen obtained different localities within paleolake basin. The comparison these shows that they generally similar climate signals, with...
Since multi-site reconstructions are less affected by site-specific climatic effects and artefacts, regional palaeotemperature based on a number of sites can provide more robust estimates centennial- to millennial-scale temperature trends than individual, records. Furthermore, multiple records necessary for developing continuous climate over time scales longer covered individual sequences. Here, we present procedure such relatively short (centuries millennia), discontinuously sampled as...
ABSTRACT Between 45 and 14.7k cal a BP, the North Atlantic climate was characterized by succession of short‐lived Greenland Stadials (GS)/Interstadials (GI), which impacted terrestrial environments. We present new pollen record from Bergsee (47°34′20″N, 7°56′11″E), ice free during Last Glacial. constructed robust chronology for period 45–14.7k BP based on 14 accelerator mass spectrometry radiocarbon dates tephra attributed to Laacher See Tephra. Vegetation history reconstructed at...
Assessing the extent to which changes in lacustrine biodiversity are affected by anthropogenic or climatic forces requires extensive palaeolimnological data. We used high-throughput sequencing generate time-series data encompassing over 2200 years of microbial eukaryotes (protists and Fungi) diversity from sedimentary DNA record two lakes (Lake Bourget French Alps Lake Igaliku Greenland). From 176 samples, we sequenced a large eukaryotes, with total 16 386 operational taxonomic units...
Varved lake sediments provide opportunities for high-resolution paleolimnological investigations that may extend monitoring surveys in order to target priority management actions under climate warming. This paper provides the synthesis of an international research program relying on >150 years-long, varved records three managed perialpine lakes Europe (Lakes Geneva, Annecy and Bourget). The dynamics dominant, local human pressures, as well ecological responses pelagic, benthic littoral...
A multi‐gene ( SSU , LSU psb A, and COI ) molecular phylogeny of the family Corallinaceae (excluding subfamilies Lithophylloideae Corallinoideae) showed a paraphyletic grouping six monophyletic clades. Pneophyllum Spongites were reassessed recircumscribed using DNA sequence data integrated with morpho‐anatomical comparisons type material recently collected specimens. We propose Chamberlainoideae subfam. nov., including genus Chamberlainium gen. C. tumidum comb. nov. as generitype, . is...
Background The Pacific region is an area unique in the world, composed of thousands islands with differing climates and environments. spreading establishment mosquito Aedes aegypti these might be linked to human migration. Ae. major vector arboviruses (dengue, chikungunya Zika viruses) region. intense circulation viruses during last decade led increase control measures by local health authorities. aim this study analyze genetic relationships among populations Methodology/Principal Finding We...
Abstract This paper presents an event stratigraphy based on data documenting the history of vegetation cover, lake‐level changes and fire frequency, as well volcanic eruptions, over Last Glacial–early Holocene transition from a terrestrial sediment sequence recovered at Lake Accesa in Tuscany (north‐central Italy). On basis age–depth model inferred 13 radiocarbon dates six tephra horizons, Oldest Dryas–Bølling warming was dated to ca. 14 560 cal. yr BP Younger Dryas 12 700–11 650 BP. Four...
In central Western Europe, several studies have shown that colder Holocene periods, such as the Little Ice Age, also correspond to wet periods. However, in mountain areas which are highly sensitive erosion processes and where precipitation events can be localized, past evolution of hydrological activity might more complicated. To assess these changes, a paleolimnological approach was applied on 13.4-m-long sediment core taken alpine Lake Anterne (2063 m asl) representing last 3.5 ka....
The spatiotemporal distribution of biochemical varves spanning the last 150 yr was investigated using 40 cores collected over a depth gradient in large subalpine lake—Lake Bourget—in French Alps. Four‐dimensional sedimentological, biological, and geochemical analyses show that varve preservation can be used as reliable proxy to reconstruct annual‐to‐decadal oscillations hypoxia lakes. volume hypoxic waters calculated by integrating between lake bottom shallowest varve‐bearing core for each...
Abstract Ciliates are unicellular heterotrophic organisms that play a key role in aquatic planktonic and benthic food webs. Advances sedimentary DNA (sed-DNA) analysis offer the possibility to integrate these bioindicators paleoenvironmental reconstructions. In this study, we used top–bottom paleolimnological approach metabarcoding techniques applied sed-DNA compare recent past (i.e. prior major anthropogenic impacts) ciliate communities of 48 lakes located along an elevation gradient. Our...
We present a chironomid-based reconstruction of late-Holocene temperature from Lake Anterne (2060 m a.s.l.) in the northern French Alps. Chironomid assemblages were studied 49 samples along an 8 long sediment core covering last 1800 years. July air temperatures inferred using inference model based on distribution chironomid 100 Swiss lakes. The transfer function has leave-one-out cross-validated coefficient determination ( r ) 0.88, root mean square error prediction (RMSEP) 1.40°C. Despite...