Lakes are essential ecosystems that provide a large number of ecosystem services whose quality is strongly impacted by human pressures. Optimal uses of lakes require adapted management practices which in turn rely on physico-chemical and biological monitoring. Long-term ecological monitoring provides large sets of environmental data. When such data are available, they have to be associated to metadata and to be stored properly to be accessible and useable by the scientific community. We present a data informatics system accessible to anyone who requests it. Maintained online since 2014 (https://si-ola.inrae.fr), it is originated from the Observatory on LAkes (OLA). It contains long-term data from 4 peri-alpine lakes (Lakes Aiguebelette, Annecy, Bourget, Geneva/Léman) and 24 high-altitude lakes of the northern French Alps. We describe the generated long-term data series, the data type, the methodologies and quality control procedures, and the information system where data are made accessible. Data use is allowed under the condition of providing reference to the original source. We show here how such a platform clearly enhances data sharing and scientific collaboration. Various studies referring to these data are regularly published in peer-reviewed journals; providing in fine a better understanding of lakes’ ecosystems functioning under local and global pressures.

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Ce que se taire veut dire. Expressions et usages politiques du silence Apparent paradoxe au regard de son titre, la revue Mots. Les langages du politique a retenu « le silence en politique » comme dossier de ce numéro. Le silence est généralement défini par la négative ou l'absence, opposé à la parole-« fait de ne pas parler, de rester sans parler ; de ne pas exprimer son opinion, de ne pas répondre », etc.-ou au bruit-« absence de bruit, d'agitation ; interruption de son », etc. (Le Petit Robert, 1982, p. 1814). Il est souvent associé au vide et à l'inertie. Pour autant, le silence n'est pas nécessairement dépourvu de sens. Il est d'abord diversement perçu selon les époques et les cultures (

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