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Climate and land-use as the main drivers of recent environmental change in a mid-altitude mountain lake, Romanian Carpathians

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorHALIUC, Aritina
dc.contributor.authorBUCZKÓ, Krisztina
dc.contributor.authorHUTCHINSON, Simon M.
dc.contributor.authorÁCS, Éva
dc.contributor.authorMAGYARI, Enikő K.
dc.contributor.authorKORPONAI, Janos
dc.contributor.authorBEGY, Robert-Csaba
dc.contributor.authorVASILACHE, Daniela
dc.contributor.authorZAK, Michal
dc.contributor.authorVERES, Daniel
dc.date.accessioned2024-04-03T08:59:01Z
dc.date.available2024-04-03T08:59:01Z
dc.date.issued2020-10-01
dc.identifier.issn1932-6203en_US
dc.identifier.urioai:crossref.org:10.1371/journal.pone.0239209
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/189151
dc.description.abstractEnRecent decades have been marked by unprecendented environmental changes which threaten the integrity of freshwater systems and their ecological value. Although most of these changes can be attributed to human activities, disentagling natural and anthropogenic drivers remains a challenge. In this study, surface sediments from Lake Ighiel, a mid-altitude site in the Carpathian Mts (Romania) were investigated following high-resolution sedimentological, geochemical, environmental magnetic and diatom analyses supported by historical cartographic and documentary evidence. Our results suggest that between 1920 and 1960 the study area experienced no significant anthropogenic impact. An excellent correspondence is observed between lake proxy responses (e.g., growth of submerged macrophytes, high detrital input, shifts in diatom assemblages) and parameters tracking natural hydroclimate variability (e.g., temperature, NAO). This highlights a dominant natural hydroclimatic control on the lacustrine system. From 1960 however, the depositional regime shifted markedly from laminated to homogenous clays; since then geochemical and magnetic data document a trend of significant (and on-going) subsurface erosion across the catchment. This is paralleled by a shift in lake ecosystem conditions denoting a strong response to an intensified anthropogenic impact, mainly through forestry. An increase in detrital input and marked changes in the diatom community are observed over the last three decades, alongside accelerated sedimentation rates following enhanced grazing and deforestation in the catchment. Recent shifts in diatom assemblages may also reflect forcing from atmospheric nitrogen (N) deposition, a key recent drive of diatom community turnover in mountain lakes. In general, enhanced human pressure alongside intermittent hydroclimate forcing drastically altered the landscape around Lake Ighiel and thus, the sedimentation regime and the ecosystem’s health. However, paleoenvironmental signals tracking natural hydroclimate variability are also clearly discernible in the proxy data. Our work illustrates the complex link between the drivers of catchment-scale impacts on one hand, and lake proxy responses on the other, highlighting the importance of an integrated historical and palaeolimnological approach to better assess lake system changes.
dc.language.isoENen_US
dc.sourcecrossref
dc.title.enClimate and land-use as the main drivers of recent environmental change in a mid-altitude mountain lake, Romanian Carpathians
dc.typeArticle de revueen_US
dc.identifier.doi10.1371/journal.pone.0239209en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalPLoS ONEen_US
bordeaux.pagee0239209en_US
bordeaux.volume15en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue10en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.identifierhal-04530486
hal.version1
hal.date.transferred2024-04-03T08:59:04Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
workflow.import.sourcedissemin
dc.rights.ccCC BYen_US
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