Trophic history of French sub-alpine lakes over the last ~150 years: phosphorus reconstruction and assessment of taphonomic biases

Like many lakes worldwide, French sub-alpine lakes (lakes Annecy, Bourget and Geneva) have suffered from eutrophication in the mid-20th century. Although restoration measures have been undertaken and resulted in significant reductions in nutrient inputs and concentrations over the last 30 years in all three lakes, the limnological monitoring does not extend back far enough to establish the reference conditions, as defined by the European Water Framework Directive. The over-arching aim of this work was to reconstruct, using a paleolimnological approach, the pre-eutrophication levels and subsequent temporal changes in the lakes trophic status over the last century. The objectives were three-fold: i) to test whether fossil diatoms archived in deep sediment cores adequately reflect past changes in the planktonic diatom communities for these deep sub-alpine lakes based on data from lake Geneva; ii) to investigate changes in the diatom communities over the last 150 years in the three lakes; and iii) to infer the past total phosphorus (TP) concentrations of the lakes from a diatom based transfer function. Annual paleolimnological and limnological diatom countings for lake Geneva were strongly correlated over the last 30 years. Most notable differences essentially resulted from both taphonomic and depositional biases, as evidenced by the underestimation of thin skeleton species such as Asterionella formosa and Diatoma tenuis in the paleolimnological dataset and the presence of many benthic taxa. The fossil diatom records revealed shifts in the communities in the three lakes over time, most of which were changes typically associated with nutrient enrichment. Indeed, in all three lakes, the proportion of Cyclotella spp. was very high before the 1950s, but these species were then replaced by more eutrophic taxa, such as Stephanodiscus spp, by the mid-20th century. From the 1980s, some but not all diatom species typical of re-oligotrophicated conditions (i.e. Cyclotella sp.) re-appeared in all three lakes. Yet, not all changes that occurred in the diatom communities since then may be attributed to decreasing TP. TP concentrations inferred from weighted averaging with classical deshrinking in lake Annecy and lake Geneva and weighted averaging with inverse deshrinking in Lake Bourget were very close to the monitored values. Comparisons of diatom-inferred TP concentrations to other paleo-proxies for trophic status revealed though that the transfer functions were rather insensitive to changes occurring below 10 ?g L-1, which limits the study ability to set accurate TP reference conditions below this threshold. However, current diatom community compositions arestill rather different from the pre-eutrophication ones, suggesting that reference conditions are still not achieved

TUmor-volume to breast-volume RAtio for improving COSmetic results in breast cancer patients (TURACOS); a randomized controlled trial

Background: Cosmetic result following breast conserving surgery (BCS) for cancer influences quality of life and psychosocial functioning in breast cancer patients. A preoperative prediction of expected cosmetic result following BCS is not (yet) standard clinical practice and therefore the choice for either mastectomy or BCS is still subjective. Recently, we showed that tumour volume to breast volume ratio as well as tumour location in the breast are independent predictors of superior cosmetic result following BCS. Implementation of a prediction model including both factors, has not been studied in a prospective manner. This study aims to improve cosmetic outcome by implementation of a prediction model in the treatment decision making for breast cancer patients opting for BCS. Methods/design: Multicentre, single-blinded, randomized controlled trial comparing standard preoperative work-up to a preoperative work-up with addition of the prediction model. Tumour volume to bre

QR-CODE PROJECT : Towards better traceability of field sampling data

Ensuring traceability of field experimental data or laboratory sampling data to conduct reproducible research is a challenge at the present time. Between the time when geolocalized specimens (biotic or abiotic) are taken, and the time the resulting data ends up in analysis published with a study, many manual operations take place and may generate errors. The French LTSER have joined forces at the national level to propose a solution as generic as possible to this problem of monitoring of the samples and the data associated with them. Compared to existing solutions (such as Laboratory Information Management Systems), we target a robust labeling solution adapted to outdoor working conditions, with the management of stocks and movements of samples. We designed and realized a prototype tested from end to end, using an open source software, cheap Zebra printers (mobile or not) and raspberries as devices. This solution provides sufficient flexibility for the wide variety of existing protocols. In strength is the record of all contextual data associated with the samples, which constitute important parameters of the subsequent analyses. At last, not only traceability is guaranteed, but also a gain of time and a rationalization of the storage of samples that will induce a return on investment

Cyber-carothèque Nationale

International audienc

"A trip to the “data management” wonderland" (Paleo-data)Fondamental in Data management - F.A.I.R. PrinciplesUsescases for Paleo-data, Core Samples & data registering strategies

Party I : Introduction & State of Data management situation ------------------------------------Isues& beneficitsof data sharing-«Long tail of Data»-Process for collecting scientific data and publications-Link for Self-training coursesParty II : Fondamental in Data management -----------------------------------------------------------Data life cycle-What kind of Data ?-Principes FAIR fondamentalsParty III : Praticals----------------------------------------------------------------------------------------------Usecase1 for Sample: Collecof cores-Usecase2 about Analyticaldata-Return to Principes FAIR (Specific)-Data-repositoryParty IV : You have some1st keys to make a -DMP (Data management plan)-Data PaperConclusion : CHECK-LISTÉcole thématiqu

Manuels utilisateurs de l'Application APK Android "Corebook Z3.5" pour alimenter le portail de la Cyber-carothèque nationale (version 2022-10-18-ANF CNRS Carottage Littoral)

User manuals of the APK Android Application "Corebook Z3.5" to populate the portal of the National Cyber-Carotheque (version 2022-10-18-ANF CNRS Carottage Littoral) Use of the Corebook for collection and synchronisation (after registration) of scientific sediment cores (any type of coring).Links to the portal : https://www.cybercarotheque.fr/index.phpManuels utilisateurs de l'Application APK Android "Corebook Z3.5" pour alimenter le portail de la Cyber-carothèque nationale (version 2022-10-18-ANF CNRS Carottage Littoral)Utilisation du Corebook pour la collecte et la synchronisation (après inscription) de carottes sédimentaires scientifiques (tout type de carottage)Lien vers le portail : https://www.cybercarotheque.fr/index.ph

Les Bases de Données : Données géographiques acquises et données produites

Ployon Estelle, Pignol Cécile, Galabertier Bruno. Les Bases de Données. Données géographiques acquises et données produites. In: Collection EDYTEM. Cahiers de géographie, numéro 16, 2014. Environnements, dynamiques et territoires de la montagne : Dix ans de recherches au laboratoire EDYTEM. pp. 163-169