scholarly journals Lake Pavin Paleolimnology and Event Stratigraphy

Lake Pavin ◽  
2016 ◽  
pp. 381-406
Author(s):  
Léo Chassiot ◽  
Emmanuel Chapron ◽  
Yannick Miras ◽  
Markus J. Schwab ◽  
Patrick Albéric ◽  
...  
Keyword(s):  
Event Stratigraphy ◽  
Lake Pavin

scholarly journals Mass collection of magnetotactic bacteria from the permanently stratified ferruginous Lake Pavin, France

2021 ◽  
Author(s):  
Vincent Busigny ◽  
François P. Mathon ◽  
Didier Jézéquel ◽  
Cécile C. Bidaud ◽  
Eric Viollier ◽  
...  
Keyword(s):  
Magnetotactic Bacteria ◽  
Lake Pavin ◽  
Mass Collection

scholarly journals A palaeoenvironmental record of the Southern Hemisphere last glacial maximum from the Mount Cass loess section, North Canterbury, Aotearoa/New Zealand

2020 ◽  
pp. 1-15
Author(s):  
Peter C. Almond ◽  
Sándor Gulyás ◽  
Pál Sümegi ◽  
Balázs P. Sümegi ◽  
Stephen Covey-Crump ◽  
...  
Keyword(s):  
New Zealand ◽  
Southern Hemisphere ◽  
Last Glacial Maximum ◽  
Climatic Variability ◽  
Glacial Maximum ◽  
Pollen Record ◽  
Good Correspondence ◽  
Last Glacial ◽  
Event Stratigraphy ◽  
Westerly Winds

Abstract Calcareous loess in North Canterbury, eastern South Island, New Zealand (NZ), preserves subfossil bird bone, terrestrial gastropods, and eggshell, whose abundances and radiocarbon ages allowed us to reconstruct aspects of palaeoenvironment at high resolution through 25 to 21 cal ka BP. This interval includes millennial-scale climatic variability during the extended last glacial maximum (30–18 ka) of Australasia. Our loess palaeoclimatic record shows good correspondence with stadial and interstadial climate events of the NZ Climate Event Stratigraphy, which were defined from a pollen record on the western side of South Island. An interstade from 25.4 to 24 cal ka BP was warm but also relatively humid on eastern South Island, and loess grain size may indicate reduced vigour of the Southern Hemisphere westerly winds. The subsequent stade (24–22.6 cal ka BP) was drier, colder, and probably windier. The next interstade remained relatively dry on eastern South Island, and westerly winds remained vigorous. The 25.4–24 ka interstade is synchronous with Heinrich stade 2, which may have driven a southward migration of the subtropical front, leading to warming and wetting of northern and central South Island and retreat of Southern Alps glaciers at ca. 26.5 ka.

Global events and event stratigraphy in the phanerozoic

Geobios ◽  
1996 ◽  
Vol 29 (3) ◽  
pp. 352
Author(s):  
Claude Babin
Keyword(s):  
Event Stratigraphy ◽  
Global Events

Members of candidate divisions OP11, OD1 and SR1 are widespread along the water column of the meromictic Lake Pavin (France)

2010 ◽  
Vol 192 (7) ◽  
pp. 559-567 ◽  
Author(s):  
Guillaume Borrel ◽  
Anne-Catherine Lehours ◽  
Corinne Bardot ◽  
Xavier Bailly ◽  
Gérard Fonty
Keyword(s):  
Water Column ◽  
Meromictic Lake ◽  
Lake Pavin

scholarly journals A 7000-year environmental history and soil erosion record inferred from the deep sediments of Lake Pavin (Massif Central, France)

2018 ◽  
Vol 497 ◽  
pp. 218-233 ◽  
Author(s):  
Léo Chassiot ◽  
Yannick Miras ◽  
Emmanuel Chapron ◽  
Anne-Lise Develle ◽  
Fabien Arnaud ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Environmental History ◽  
Massif Central ◽  
Lake Pavin ◽  
Deep Sediments

Lake Pavin Mixing: New Insights from High Resolution Continuous Measurements

Lake Pavin ◽  
2016 ◽  
pp. 177-184
Author(s):  
Céline Bonhomme ◽  
Didier Jézéquel ◽  
Michel Poulin ◽  
Mohamed Saad ◽  
Brigitte Vinçon-Leite ◽  
...  
Keyword(s):  
High Resolution ◽  
Continuous Measurements ◽  
Lake Pavin

Mid-to late-Holocene coastal dune event stratigraphy for the north coast of Northern Ireland

The Holocene ◽  
2004 ◽  
Vol 14 (3) ◽  
pp. 406-416 ◽  
Author(s):  
Peter Wilson ◽  
John McGourty ◽  
Mark D. Bateman
Keyword(s):  
Northern Ireland ◽  
Late Holocene ◽  
Coastal Dune ◽  
North Coast ◽  
The North ◽  
Event Stratigraphy

scholarly journals Genetic Diversity of Small Eukaryotes in Lakes Differing by Their Trophic Status

2005 ◽  
Vol 71 (10) ◽  
pp. 5935-5942 ◽  
Author(s):  
Marie Lefranc ◽  
Aurélie Thénot ◽  
Cécile Lepère ◽  
Didier Debroas
Keyword(s):  
Trophic Status ◽  
Eutrophic Lake ◽  
Rrna Genes ◽  
Eutrophic Lakes ◽  
Massif Central ◽  
Operational Taxonomic Units ◽  
Single Clone ◽  
18S Rrna Genes ◽  
Lake Pavin ◽  
Environmental Sequences

ABSTRACT Small eukaryotes, cells with a diameter of less than 5 μm, are fundamental components of lacustrine planktonic systems. In this study, small-eukaryote diversity was determined by sequencing cloned 18S rRNA genes in three libraries from lakes of differing trophic status in the Massif Central, France: the oligotrophic Lake Godivelle, the oligomesotrophic Lake Pavin, and the eutrophic Lake Aydat. This analysis shows that the least diversified library was in the eutrophic lake (12 operational taxonomic units [OTUs]) and the most diversified was in the oligomesotrophic lake (26 OTUs). Certain groups were present in at least two ecosystems, while the others were specific to one lake on the sampling date. Cryptophyta, Chrysophyceae, and the strictly heterotrophic eukaryotes, Ciliophora and fungi, were identified in the three libraries. Among the small eukaryotes found only in two lakes, Choanoflagellida and environmental sequences (LKM11) were not detected in the eutrophic system whereas Cercozoa were confined to the oligomesotrophic and eutrophic lakes. Three OTUs, linked to the Perkinsozoa, were detected only in the Aydat library, where they represented 60% of the clones of the library. Chlorophyta and Haptophyta lineages were represented by a single clone and were present only in Godivelle and Pavin, respectively. Of the 127 clones studied, classical pigmented organisms (autotrophs and mixotrophs) represented only a low proportion regardless of the library's origin. This study shows that the small-eukaryote community composition may differ as a function of trophic status; certain lineages could be detected only in a single ecosystem.

Methanobacterium lacus sp. nov., isolated from the profundal sediment of a freshwater meromictic lake

2012 ◽  
Vol 62 (Pt_7) ◽  
pp. 1625-1629 ◽  
Author(s):  
Guillaume Borrel ◽  
Keith Joblin ◽  
Annie Guedon ◽  
Jonathan Colombet ◽  
Vincent Tardy ◽  
...  
Keyword(s):  
Rumen Fluid ◽  
Sequence Similarity ◽  
Phylogenetic Analyses ◽  
Meromictic Lake ◽  
Rrna Gene ◽  
The Novel ◽  
Content Type ◽  
Link Type ◽  
Gram Staining ◽  
Lake Pavin

An autotrophic, hydrogenotrophic methanogen, designated strain 17A1T, was isolated from the profundal sediment of the meromictic Lake Pavin, France. The cells of the novel strain, which were non-motile, Gram-staining-negative rods that measured 2–15 µm in length and 0.2–0.4 µm in width, grew as filaments. Strain 17A1T grew in a mineral medium and its growth was stimulated by the addition of yeast extract, vitamins, acetate or rumen fluid. Penicillin, vancomycin and kanamycin reduced growth but did not completely inhibit it. Growth occurred at 14–41 °C (optimum 30 °C), at pH 5.0–8.5 (optimum pH 6.5) and with 0–0.4 M NaCl (optimum 0.1 M). The novel strain utilized H2/CO2 and methanol/H2 as substrates but not formate, acetate, methylamine/H2, isobutanol or 2-propanol. Its genomic DNA G+C content was 37.0 mol%. In phylogenetic analyses based on 16S rRNA gene sequences, strain 17A1T appeared to be a member of the genus Methanobacterium , with Methanobacterium beijingense 8-2T (96.3 % sequence similarity) identified as the most closely related established species. Based on phenotypic and phylogenetic data, strain 17A1T represents a novel species of methanogen within the genus Methanobacterium , for which the name Methanobacterium lacus sp. nov. is proposed. The type strain is 17A1T ( = DSM 24406T = JCM 17760T).

Sign in / Sign up

Export Citation Format

Share Document