Exploring the gender difference in type 2 diabetes incidence in a Swiss cohort using latent class analysis: an intersectional approach

Introduction Type 2 diabetes is multifactorial and influenced by the intersection of gender-related variables and other determinants of health. The aim of this study was to highlight the intersectional social position of the participants and disentangle its role from administrative sex in predicting the development of type 2 diabetes.Methods Using CoLaus|PsyCoLaus study, a Swiss single-centre prospective cohort initiated in 2003 and including 6733 participants (age 35–75 years; 54% women) at baseline, we conducted latent class analyses using gender-related variables (eg, risk-taking behaviours, gender roles represented by employment status, etc) and socioeconomic determinants at baseline (2003–2006) to construct intersectional classes and we tested their association with the development of type 2 diabetes at follow-up (2018–2021).Results Of the 6733 participants enrolled at baseline, 3409 were included in our analyses (50.6%). Over a median follow-up time of 14.5 years, 255 (7.5%) participants developed type 2 diabetes, of which 158 men (62.0%). We identified seven latent classes highlighting different intersectional social position groups (ie, young, fit, educated men (N=413), non-White physically inactive men and women (N=170), highly qualified men, former or current smokers (N=557), working women living alone (N=914), low qualified working men with overweight (N=445), women with obesity, low education and low qualified job or housewives (N=329), low educated retired participants (N=581)). Using the class labelled as ‘young, fit, educated men’ as reference, the risk of incident type 2 diabetes was higher in all other classes (adjusted OR values between 4.22 and 13.47). Classes mostly feminine had a more unfavourable intersectional social position than that of the predominantly masculine classes. The corresponding OR increased in sex-adjusted regressions analyses.Conclusions We observe cumulative intersectional effects across behavioural and socioeconomic profiles with different risks of developing type 2 diabetes emphasising the deleterious effect of a feminine gender profile. These patterns are only partly captured by traditional sex-stratified analyses

Carbone des sols en Afrique

Les sols sont une ressource essentielle à préserver pour la production d’aliments, de fibres, de biomasse, pour la filtration de l’eau, la préservation de la biodiversité et le stockage du carbone. En tant que réservoirs de carbone, les sols sont par ailleurs appelés à jouer un rôle primordial dans la lutte contre l’augmentation de la concentration de gaz à effet de serre. Ils sont ainsi au centre des objectifs de développement durable (ODD) des Nations unies, notamment les ODD 2 « Faim zéro », 13 « Lutte contre le changement climatique », 15 « Vie terrestre », 12 « Consommation et production responsables » ou encore 1 « Pas de pauvreté ». Cet ouvrage présente un état des lieux des sols africains dans toute leur diversité, mais au-delà, il documente les capacités de stockage de carbone selon les types de sols et leurs usages en Afrique. Il propose également des recommandations autour de l’acquisition et de l’interprétation des données, ainsi que des options pour préserver, voire augmenter les stocks de carbone dans les sols. Tous les chercheurs et acteurs du développement impliqués dans les recherches sur le rôle du carbone des sols sont concernés par cette synthèse collective. Fruit d’une collaboration entre chercheurs africains et européens, ce livre insiste sur la nécessité de prendre en compte la grande variété des contextes agricoles et forestiers africains pour améliorer nos connaissances sur les capacités de stockage de carbone des sols et lutter contre le changement climatique

Traitements de substitution aux opiacés et pratique officinale

BESANCON-BU Médecine pharmacie (250562102) / SudocSudocFranceF

Quelle relance par la Présidence française en matière d'immigration légale?

Actes de l'Université européenne d'été de Rennes du 27 août 2008 au 5 septembre 200

Catalytic Reduction of Nitrate in Water on a Monometallic Pd/CeO2 Catalyst

International audienceWhereas monometallic palladium catalysts deposited on classical supports such as silica, alumina, or carbon are totally inactive for nitrate reduction, we have demonstrated that a reduced Pd/CeO2 catalyst is active for this reaction (33 mmol/(min gmet)). The promoting effect of the support, based on its redox properties, was clearly identified, nitrate reduction probably occurring through the interaction of oxygen atoms of nitrate with the oxygen vacancies created at the ceria surface upon the reduction treatment. Conversely, nitrite intermediates are converted through a classical catalytic reaction by hydrogen adsorbed on palladium sites

Biographie d’un monument mégalithique du Néolithique moyen sur la côte sauvage de Quiberon dans le Morbihan

International audienceSeveral preventive archaeology operations carried out between 2016 and 2019, in the village of Manémeur on the wild coast of Quiberon, have brought to light the last remains of a Neolithic megalithic complex whose advanced state of degradation has caused the disappearance of almost the entire elevation. This monument was originally described as consisting of three dolmens included in a single cairn, arranged on the same line running from north to south. Before our intervention, it had already been the subject of several investigations at the end of the 19th century and in the 1930s.In spite of this, the exhaustive excavation has revealed the modes and phases of construction of this complex monument, built in several stages.It is a cairn including two dolmens with quadrangular chambers and fairly long passages. They are parallel and open to the southeast. The partial plans of the sepulchral spaces could be reconstructed thanks to the presence of either the remains of broken granite standing stones, or the pits where the torn off elements were wedged in place, or, in dolmen 2, the intact orthostats. The circulation levels in these spaces were identified thanks to the paving of the floors, megalithic for that of the chamber of dolmen 1. The excavation revealed the relative chronology of the main construction phases of dolmen 1. The two parts of the corridor have sufficiently different characteristics to suppose that they were built in two phases, with a first northern portion extended by a southern portion, and are part of successive architectural projects. The chamber of dolmen 2 rests against the facing of the chamber of dolmen 1, implying that the latter was built earlier. The excavation was a unique opportunity on the Morbihan coast to study the basic structures and foundations of a monument of this type, revealing the internal partitions of the cairn and the preparation levels intended to receive the paving of the internal spaces.The cairn, as well as the facings and orthostats of the monument, is made up almost exclusively of granitic elements, even if a few blocks of quartz or pegmatite are occasionally present. If most of them have less sharp edges that indicate an extraction, the construction of the external facing is clearly distinguished from the rest by the placement of blunt blocks with rounded shapes attesting to a collection on the foreshore.The substratum underneath the monument, exposed at the end of the excavation, revealed traces of extraction of large slabs prior to the erection of the monument. The extraction was facilitated by the flaky texture of the granite and a network of diaclases that cut the massif into parallelepipedic blocks.At the same time, it has allowed a regularization of the terrain, inscribed on an eminence linked to a granitic rise. The micromorphological study showed that the soil covering the substratum had largely been reworked, most likely scraped to allow extraction and then respread before construction. Some large quartz impactors as well as several bevelled pieces are likely to have participated in the removal of the granite slabs.The associated archaeological material, which is quite abundant, has made it possible to attribute dolmen 1 to the end of the Middle Neolithic II, which is confirmed by radiocarbon dating. Dolmen 2, less rich, yielded more mixed material, most of which points to an attribution to the beginning of the Late Neolithic. Exclusively discovered under the floor levels of the monument, these ceramic and lithic materials have a very uneven spatial distribution that does not seem fortuitous and is probably the result of staging. Similarly, environmental studies have indeed revealed the presence of plantain, Plantago lanceolata for carpology and Plantago coronopus for palynology, whose very high concentrations argue for an anthropic spreading. These remains and their arrangement inside and outside the funerary space thus testify to deposits associated with the foundation of the monument, which constitute practices that are rarely discussed because they are too rarely brought to light.The Manémeur site is part of a vast group of monuments of the same type (passage graves enclosed in a terminal cairn) identified in the vicinity and more widely on the Morbihan coast. Many of them belong to the Middle Neolithic or the late Neolithic. Although some of them group up to four passage dolmens in the same cairn, the relative chronologies are not always clearly established and the internal structures of the cairns have not been explored much.The excavation carried out here has brought new light and new knowledge to this ensemble, showing at the same time all the informative potential of the exhaustive study of such monuments, even when they have been largely destroyed.Plusieurs opérations d'archéologie préventive réalisées entre 2016 et 2019, dans le village du Manémeur sur la côte Sauvage de Quiberon, ont conduit à la (re)découverte des derniers vestiges d'un ensemble mégalithique néolithique dont l'état de dégradation très avancé a fait disparaître la quasi-totalité de l'élévation. Malgré cela, la fouille a constitué une opportunité unique sur le littoral morbihannais d'étudier les structures de base et les fondations d'un monument de ce type, mettant en évidence des cloisonnements internes au cairn et des niveaux de préparation destinés à recevoir les dallages des espaces internes.Il s'agit d'un cairn incluant deux dolmens à chambres quadrangulaires et à couloirs assez longs, parallèles et s'ouvrant au sud-est. Les plans partiels des espaces sépulcraux ont pu être restitués et les niveaux de circulation identifiés grâce aux dallages des sols, mégalithique pour celui de la chambre du dolmen 1. La chambre du dolmen 2 prend appui contre le parement de la chambre du dolmen 1, impliquant l'antériorité de ce dernier.Le substrat sous-jacent au monument mis à nu en fin de fouille a révélé des traces d'extraction de grandes dalles préalablement à l'érection de ce dernier. L'étude micromorphologique a montré que les terres qui recouvraient le substrat avaient été en grande partie remaniées, très probablement raclées pour permettre l'extraction puis réétalées avant la construction.Le mobilier archéologique associé, assez abondant, a permis d'attribuer le dolmen 1 à la fin du Néolithique moyen II, ce que confirment les datations radiocarbone. Le dolmen 2, moins riche, a livré un mobilier plus mélangé, dont l'essentiel oriente vers une attribution au début du Néolithique récent. Exclusivement découverts sous les niveaux de sol du monument, ces mobiliers céramique et lithique ont une répartition spatiale très inégale qui ne semble pas fortuite et résulte très probablement d'une mise en scène. De la même façon, les études environnementales ont révélé la présence de plantain, Plantago lanceolata pour la carpologie et Plantago coronopus pour la palynologie, dont les très fortes concentrations plaident pour un épandage anthropique. Ces vestiges et leur disposition dans et en dehors de l'espace funéraire témoignent de dépôts associés à la fondation du monument

Biographie d’un monument mégalithique du Néolithique moyen sur la côte sauvage de Quiberon dans le Morbihan

International audienceSeveral preventive archaeology operations carried out between 2016 and 2019, in the village of Manémeur on the wild coast of Quiberon, have brought to light the last remains of a Neolithic megalithic complex whose advanced state of degradation has caused the disappearance of almost the entire elevation. This monument was originally described as consisting of three dolmens included in a single cairn, arranged on the same line running from north to south. Before our intervention, it had already been the subject of several investigations at the end of the 19th century and in the 1930s.In spite of this, the exhaustive excavation has revealed the modes and phases of construction of this complex monument, built in several stages.It is a cairn including two dolmens with quadrangular chambers and fairly long passages. They are parallel and open to the southeast. The partial plans of the sepulchral spaces could be reconstructed thanks to the presence of either the remains of broken granite standing stones, or the pits where the torn off elements were wedged in place, or, in dolmen 2, the intact orthostats. The circulation levels in these spaces were identified thanks to the paving of the floors, megalithic for that of the chamber of dolmen 1. The excavation revealed the relative chronology of the main construction phases of dolmen 1. The two parts of the corridor have sufficiently different characteristics to suppose that they were built in two phases, with a first northern portion extended by a southern portion, and are part of successive architectural projects. The chamber of dolmen 2 rests against the facing of the chamber of dolmen 1, implying that the latter was built earlier. The excavation was a unique opportunity on the Morbihan coast to study the basic structures and foundations of a monument of this type, revealing the internal partitions of the cairn and the preparation levels intended to receive the paving of the internal spaces.The cairn, as well as the facings and orthostats of the monument, is made up almost exclusively of granitic elements, even if a few blocks of quartz or pegmatite are occasionally present. If most of them have less sharp edges that indicate an extraction, the construction of the external facing is clearly distinguished from the rest by the placement of blunt blocks with rounded shapes attesting to a collection on the foreshore.The substratum underneath the monument, exposed at the end of the excavation, revealed traces of extraction of large slabs prior to the erection of the monument. The extraction was facilitated by the flaky texture of the granite and a network of diaclases that cut the massif into parallelepipedic blocks.At the same time, it has allowed a regularization of the terrain, inscribed on an eminence linked to a granitic rise. The micromorphological study showed that the soil covering the substratum had largely been reworked, most likely scraped to allow extraction and then respread before construction. Some large quartz impactors as well as several bevelled pieces are likely to have participated in the removal of the granite slabs.The associated archaeological material, which is quite abundant, has made it possible to attribute dolmen 1 to the end of the Middle Neolithic II, which is confirmed by radiocarbon dating. Dolmen 2, less rich, yielded more mixed material, most of which points to an attribution to the beginning of the Late Neolithic. Exclusively discovered under the floor levels of the monument, these ceramic and lithic materials have a very uneven spatial distribution that does not seem fortuitous and is probably the result of staging. Similarly, environmental studies have indeed revealed the presence of plantain, Plantago lanceolata for carpology and Plantago coronopus for palynology, whose very high concentrations argue for an anthropic spreading. These remains and their arrangement inside and outside the funerary space thus testify to deposits associated with the foundation of the monument, which constitute practices that are rarely discussed because they are too rarely brought to light.The Manémeur site is part of a vast group of monuments of the same type (passage graves enclosed in a terminal cairn) identified in the vicinity and more widely on the Morbihan coast. Many of them belong to the Middle Neolithic or the late Neolithic. Although some of them group up to four passage dolmens in the same cairn, the relative chronologies are not always clearly established and the internal structures of the cairns have not been explored much.The excavation carried out here has brought new light and new knowledge to this ensemble, showing at the same time all the informative potential of the exhaustive study of such monuments, even when they have been largely destroyed.Plusieurs opérations d'archéologie préventive réalisées entre 2016 et 2019, dans le village du Manémeur sur la côte Sauvage de Quiberon, ont conduit à la (re)découverte des derniers vestiges d'un ensemble mégalithique néolithique dont l'état de dégradation très avancé a fait disparaître la quasi-totalité de l'élévation. Malgré cela, la fouille a constitué une opportunité unique sur le littoral morbihannais d'étudier les structures de base et les fondations d'un monument de ce type, mettant en évidence des cloisonnements internes au cairn et des niveaux de préparation destinés à recevoir les dallages des espaces internes.Il s'agit d'un cairn incluant deux dolmens à chambres quadrangulaires et à couloirs assez longs, parallèles et s'ouvrant au sud-est. Les plans partiels des espaces sépulcraux ont pu être restitués et les niveaux de circulation identifiés grâce aux dallages des sols, mégalithique pour celui de la chambre du dolmen 1. La chambre du dolmen 2 prend appui contre le parement de la chambre du dolmen 1, impliquant l'antériorité de ce dernier.Le substrat sous-jacent au monument mis à nu en fin de fouille a révélé des traces d'extraction de grandes dalles préalablement à l'érection de ce dernier. L'étude micromorphologique a montré que les terres qui recouvraient le substrat avaient été en grande partie remaniées, très probablement raclées pour permettre l'extraction puis réétalées avant la construction.Le mobilier archéologique associé, assez abondant, a permis d'attribuer le dolmen 1 à la fin du Néolithique moyen II, ce que confirment les datations radiocarbone. Le dolmen 2, moins riche, a livré un mobilier plus mélangé, dont l'essentiel oriente vers une attribution au début du Néolithique récent. Exclusivement découverts sous les niveaux de sol du monument, ces mobiliers céramique et lithique ont une répartition spatiale très inégale qui ne semble pas fortuite et résulte très probablement d'une mise en scène. De la même façon, les études environnementales ont révélé la présence de plantain, Plantago lanceolata pour la carpologie et Plantago coronopus pour la palynologie, dont les très fortes concentrations plaident pour un épandage anthropique. Ces vestiges et leur disposition dans et en dehors de l'espace funéraire témoignent de dépôts associés à la fondation du monument

Biographie d’un monument mégalithique du Néolithique moyen sur la côte sauvage de Quiberon dans le Morbihan

International audienceSeveral preventive archaeology operations carried out between 2016 and 2019, in the village of Manémeur on the wild coast of Quiberon, have brought to light the last remains of a Neolithic megalithic complex whose advanced state of degradation has caused the disappearance of almost the entire elevation. This monument was originally described as consisting of three dolmens included in a single cairn, arranged on the same line running from north to south. Before our intervention, it had already been the subject of several investigations at the end of the 19th century and in the 1930s.In spite of this, the exhaustive excavation has revealed the modes and phases of construction of this complex monument, built in several stages.It is a cairn including two dolmens with quadrangular chambers and fairly long passages. They are parallel and open to the southeast. The partial plans of the sepulchral spaces could be reconstructed thanks to the presence of either the remains of broken granite standing stones, or the pits where the torn off elements were wedged in place, or, in dolmen 2, the intact orthostats. The circulation levels in these spaces were identified thanks to the paving of the floors, megalithic for that of the chamber of dolmen 1. The excavation revealed the relative chronology of the main construction phases of dolmen 1. The two parts of the corridor have sufficiently different characteristics to suppose that they were built in two phases, with a first northern portion extended by a southern portion, and are part of successive architectural projects. The chamber of dolmen 2 rests against the facing of the chamber of dolmen 1, implying that the latter was built earlier. The excavation was a unique opportunity on the Morbihan coast to study the basic structures and foundations of a monument of this type, revealing the internal partitions of the cairn and the preparation levels intended to receive the paving of the internal spaces.The cairn, as well as the facings and orthostats of the monument, is made up almost exclusively of granitic elements, even if a few blocks of quartz or pegmatite are occasionally present. If most of them have less sharp edges that indicate an extraction, the construction of the external facing is clearly distinguished from the rest by the placement of blunt blocks with rounded shapes attesting to a collection on the foreshore.The substratum underneath the monument, exposed at the end of the excavation, revealed traces of extraction of large slabs prior to the erection of the monument. The extraction was facilitated by the flaky texture of the granite and a network of diaclases that cut the massif into parallelepipedic blocks.At the same time, it has allowed a regularization of the terrain, inscribed on an eminence linked to a granitic rise. The micromorphological study showed that the soil covering the substratum had largely been reworked, most likely scraped to allow extraction and then respread before construction. Some large quartz impactors as well as several bevelled pieces are likely to have participated in the removal of the granite slabs.The associated archaeological material, which is quite abundant, has made it possible to attribute dolmen 1 to the end of the Middle Neolithic II, which is confirmed by radiocarbon dating. Dolmen 2, less rich, yielded more mixed material, most of which points to an attribution to the beginning of the Late Neolithic. Exclusively discovered under the floor levels of the monument, these ceramic and lithic materials have a very uneven spatial distribution that does not seem fortuitous and is probably the result of staging. Similarly, environmental studies have indeed revealed the presence of plantain, Plantago lanceolata for carpology and Plantago coronopus for palynology, whose very high concentrations argue for an anthropic spreading. These remains and their arrangement inside and outside the funerary space thus testify to deposits associated with the foundation of the monument, which constitute practices that are rarely discussed because they are too rarely brought to light.The Manémeur site is part of a vast group of monuments of the same type (passage graves enclosed in a terminal cairn) identified in the vicinity and more widely on the Morbihan coast. Many of them belong to the Middle Neolithic or the late Neolithic. Although some of them group up to four passage dolmens in the same cairn, the relative chronologies are not always clearly established and the internal structures of the cairns have not been explored much.The excavation carried out here has brought new light and new knowledge to this ensemble, showing at the same time all the informative potential of the exhaustive study of such monuments, even when they have been largely destroyed.Plusieurs opérations d'archéologie préventive réalisées entre 2016 et 2019, dans le village du Manémeur sur la côte Sauvage de Quiberon, ont conduit à la (re)découverte des derniers vestiges d'un ensemble mégalithique néolithique dont l'état de dégradation très avancé a fait disparaître la quasi-totalité de l'élévation. Malgré cela, la fouille a constitué une opportunité unique sur le littoral morbihannais d'étudier les structures de base et les fondations d'un monument de ce type, mettant en évidence des cloisonnements internes au cairn et des niveaux de préparation destinés à recevoir les dallages des espaces internes.Il s'agit d'un cairn incluant deux dolmens à chambres quadrangulaires et à couloirs assez longs, parallèles et s'ouvrant au sud-est. Les plans partiels des espaces sépulcraux ont pu être restitués et les niveaux de circulation identifiés grâce aux dallages des sols, mégalithique pour celui de la chambre du dolmen 1. La chambre du dolmen 2 prend appui contre le parement de la chambre du dolmen 1, impliquant l'antériorité de ce dernier.Le substrat sous-jacent au monument mis à nu en fin de fouille a révélé des traces d'extraction de grandes dalles préalablement à l'érection de ce dernier. L'étude micromorphologique a montré que les terres qui recouvraient le substrat avaient été en grande partie remaniées, très probablement raclées pour permettre l'extraction puis réétalées avant la construction.Le mobilier archéologique associé, assez abondant, a permis d'attribuer le dolmen 1 à la fin du Néolithique moyen II, ce que confirment les datations radiocarbone. Le dolmen 2, moins riche, a livré un mobilier plus mélangé, dont l'essentiel oriente vers une attribution au début du Néolithique récent. Exclusivement découverts sous les niveaux de sol du monument, ces mobiliers céramique et lithique ont une répartition spatiale très inégale qui ne semble pas fortuite et résulte très probablement d'une mise en scène. De la même façon, les études environnementales ont révélé la présence de plantain, Plantago lanceolata pour la carpologie et Plantago coronopus pour la palynologie, dont les très fortes concentrations plaident pour un épandage anthropique. Ces vestiges et leur disposition dans et en dehors de l'espace funéraire témoignent de dépôts associés à la fondation du monument

Biographie d’un monument mégalithique du Néolithique moyen sur la côte sauvage de Quiberon dans le Morbihan

International audienceSeveral preventive archaeology operations carried out between 2016 and 2019, in the village of Manémeur on the wild coast of Quiberon, have brought to light the last remains of a Neolithic megalithic complex whose advanced state of degradation has caused the disappearance of almost the entire elevation. This monument was originally described as consisting of three dolmens included in a single cairn, arranged on the same line running from north to south. Before our intervention, it had already been the subject of several investigations at the end of the 19th century and in the 1930s.In spite of this, the exhaustive excavation has revealed the modes and phases of construction of this complex monument, built in several stages.It is a cairn including two dolmens with quadrangular chambers and fairly long passages. They are parallel and open to the southeast. The partial plans of the sepulchral spaces could be reconstructed thanks to the presence of either the remains of broken granite standing stones, or the pits where the torn off elements were wedged in place, or, in dolmen 2, the intact orthostats. The circulation levels in these spaces were identified thanks to the paving of the floors, megalithic for that of the chamber of dolmen 1. The excavation revealed the relative chronology of the main construction phases of dolmen 1. The two parts of the corridor have sufficiently different characteristics to suppose that they were built in two phases, with a first northern portion extended by a southern portion, and are part of successive architectural projects. The chamber of dolmen 2 rests against the facing of the chamber of dolmen 1, implying that the latter was built earlier. The excavation was a unique opportunity on the Morbihan coast to study the basic structures and foundations of a monument of this type, revealing the internal partitions of the cairn and the preparation levels intended to receive the paving of the internal spaces.The cairn, as well as the facings and orthostats of the monument, is made up almost exclusively of granitic elements, even if a few blocks of quartz or pegmatite are occasionally present. If most of them have less sharp edges that indicate an extraction, the construction of the external facing is clearly distinguished from the rest by the placement of blunt blocks with rounded shapes attesting to a collection on the foreshore.The substratum underneath the monument, exposed at the end of the excavation, revealed traces of extraction of large slabs prior to the erection of the monument. The extraction was facilitated by the flaky texture of the granite and a network of diaclases that cut the massif into parallelepipedic blocks.At the same time, it has allowed a regularization of the terrain, inscribed on an eminence linked to a granitic rise. The micromorphological study showed that the soil covering the substratum had largely been reworked, most likely scraped to allow extraction and then respread before construction. Some large quartz impactors as well as several bevelled pieces are likely to have participated in the removal of the granite slabs.The associated archaeological material, which is quite abundant, has made it possible to attribute dolmen 1 to the end of the Middle Neolithic II, which is confirmed by radiocarbon dating. Dolmen 2, less rich, yielded more mixed material, most of which points to an attribution to the beginning of the Late Neolithic. Exclusively discovered under the floor levels of the monument, these ceramic and lithic materials have a very uneven spatial distribution that does not seem fortuitous and is probably the result of staging. Similarly, environmental studies have indeed revealed the presence of plantain, Plantago lanceolata for carpology and Plantago coronopus for palynology, whose very high concentrations argue for an anthropic spreading. These remains and their arrangement inside and outside the funerary space thus testify to deposits associated with the foundation of the monument, which constitute practices that are rarely discussed because they are too rarely brought to light.The Manémeur site is part of a vast group of monuments of the same type (passage graves enclosed in a terminal cairn) identified in the vicinity and more widely on the Morbihan coast. Many of them belong to the Middle Neolithic or the late Neolithic. Although some of them group up to four passage dolmens in the same cairn, the relative chronologies are not always clearly established and the internal structures of the cairns have not been explored much.The excavation carried out here has brought new light and new knowledge to this ensemble, showing at the same time all the informative potential of the exhaustive study of such monuments, even when they have been largely destroyed.Plusieurs opérations d'archéologie préventive réalisées entre 2016 et 2019, dans le village du Manémeur sur la côte Sauvage de Quiberon, ont conduit à la (re)découverte des derniers vestiges d'un ensemble mégalithique néolithique dont l'état de dégradation très avancé a fait disparaître la quasi-totalité de l'élévation. Malgré cela, la fouille a constitué une opportunité unique sur le littoral morbihannais d'étudier les structures de base et les fondations d'un monument de ce type, mettant en évidence des cloisonnements internes au cairn et des niveaux de préparation destinés à recevoir les dallages des espaces internes.Il s'agit d'un cairn incluant deux dolmens à chambres quadrangulaires et à couloirs assez longs, parallèles et s'ouvrant au sud-est. Les plans partiels des espaces sépulcraux ont pu être restitués et les niveaux de circulation identifiés grâce aux dallages des sols, mégalithique pour celui de la chambre du dolmen 1. La chambre du dolmen 2 prend appui contre le parement de la chambre du dolmen 1, impliquant l'antériorité de ce dernier.Le substrat sous-jacent au monument mis à nu en fin de fouille a révélé des traces d'extraction de grandes dalles préalablement à l'érection de ce dernier. L'étude micromorphologique a montré que les terres qui recouvraient le substrat avaient été en grande partie remaniées, très probablement raclées pour permettre l'extraction puis réétalées avant la construction.Le mobilier archéologique associé, assez abondant, a permis d'attribuer le dolmen 1 à la fin du Néolithique moyen II, ce que confirment les datations radiocarbone. Le dolmen 2, moins riche, a livré un mobilier plus mélangé, dont l'essentiel oriente vers une attribution au début du Néolithique récent. Exclusivement découverts sous les niveaux de sol du monument, ces mobiliers céramique et lithique ont une répartition spatiale très inégale qui ne semble pas fortuite et résulte très probablement d'une mise en scène. De la même façon, les études environnementales ont révélé la présence de plantain, Plantago lanceolata pour la carpologie et Plantago coronopus pour la palynologie, dont les très fortes concentrations plaident pour un épandage anthropique. Ces vestiges et leur disposition dans et en dehors de l'espace funéraire témoignent de dépôts associés à la fondation du monument