The mires of the Loire upstream catchment (Eastern Massif central): heritage value, phytocenotic interest and economic uses

Cubizolle, Hervé; Sacca, Céline; Tourman, Arnaud; Porteret, Jérôme; Thébaud, Gilles

doi:10.4000/norois.943

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…The dashed line symbolises a mean rainfall of 900 mm/year. Mire types follow the topology established byCubizolle et al (2004) andCubizolle and Th ebaud (2014). a) Topogenous mires, b) soligenous mires, c) ombrogenous mires, d) limnogenous mires in a volcanic or periglacial context.…”

mentioning

confidence: 74%

From natural to cultural mires during the last 15 ka years: An integrated approach comparing 14C ages on basal peat layers with geomorphological, palaeoecological and archaeological data (Eastern Massif Central, France)

Dendievel

Jouffroy‐Bapicot

Argant

et al. 2020

Quaternary Science Reviews

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This paper studies mire initiation modalities from the Late-Glacial to the Holocene by comparing radiocarbon ages on basal peat layers (112 sites from the Eastern French Massif Central e EFMC) with long-term land cover changes. We developed a semi-quantitative method based on the degree of openness and on Anthropogenic Impact Factors (AIF scores) from palaeoecological data (mire and lake records). Archaeological information was also considered to evaluate human impact. We compared regional mire development trends with datasets from Northern Europe, Siberia, Alaska and Canada, and with global CH 4 emission. Heterogenous cases of mire initiation were highlighted during the last 15 ka years in the EMFC. From 15 to 11.7 ka cal. BP, some mires and histic horizons occurred, although further research is needed to better understand these peat accumulation phases. Related to the Early Holocene warming, a mire generation established by terrestrialization, in the southern EFMC where geomorphology favoured fens. Bogs also formed by paludification in the whole area between 10 and 7 ka cal. BP. Then, various cases of mire initiation were found from 4.4 to 2.4 ka cal. BP. The high number of mires established since 2.4 ka cal. BP could be related to major anthropogenic changes, indirectly favouring fens (in former ponds for instance) or small bogs (at the back of roads, walls or in abandoned drainage systems). This last generation was typical of Western European mountains and implied that moderate human impact may also produce socio-ecosystems with high ecological value.

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confidence: 74%

From natural to cultural mires during the last 15 ka years: An integrated approach comparing 14C ages on basal peat layers with geomorphological, palaeoecological and archaeological data (Eastern Massif Central, France)

Dendievel

Jouffroy‐Bapicot

Argant

et al. 2020

Quaternary Science Reviews

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“…Enfin, ces vingt dernières années, plusieurs recherches à caractère écologique ou paléoenvironnemental ont fait progresser la connaissance globale du fonctionnement de ces tourbières (Francez, 1991 ;Janssen, 1990 ;Cubizolle et al, 2003 ;Cubizolle et al, 2004 ;Cubizolle, 2005…). L'objectif de ce travail est la caractérisation phytocénotique et synécologique des formations tourbeuses à dominante ombrotrophe du Massif central oriental.…”

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Communautés végétales des tourbières ombrotrophes du Massif central oriental (France)

Thébaud¹,

Goubet²,

Skrzypczak³

et al. 2009

Acta Botanica Gallica

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Résumé.-Le Massif central oriental est riche de nombreux sites tourbeux éche-lonnés entre 600 m et 1600 m d'altitude, certains particulièrement remarquables sur le plan biologique. Pourtant les recherches concernant leurs végétations restent peu développées et ponctuelles. Nous comblons ici partiellement cette lacune par une analyse d'ensemble des communautés végétales ombrotrophiles de ce secteur géographique. Les résultats issus de CAH et AFC portant sur 129 relevés phytosociologiques et 142 espèces conduisent à l'individualisation de 24 « syntaxons élémentaires » et 8 groupes de taxons différentiels. La végétation se différencie principalement en fonction de la richesse minérale et de l'humidité. Elle traduit aussi indirectement une opposition d'origine climatique entre systèmes de tourbières bombées compactes, hyperoligotrophes et hyperombrotrophes au nord de la région, sous influence océanique, et systèmes de buttes ombrominérotrophes isolées au sud ou à moindre altitude, sous climat plus sec et plus chaud en été, à caractère plus continental. Nous rattachons ces groupements à 9 associations végétales déjà existantes. Mots clés : communautés végétales -tourbières -Massif central -syntaxons élémentaires -Sphagnion magellanici.Abstract.-The eastern mountains of the French Massif central are rich of numerous and various peatlands wich can be studied on a broad latitudinal and elevational scale. This work is the first attempt to characterise their ombrotrophic vegetations. 129 phytosociological relevés including 142 embryophytic plant species and lichens are analysed by cluster and correspondence analysis. 24 elementary syntaxa, differentiated on the basis of 8 sets of species and segregated along a moisture and a nutrient gradients, are then defined. Vegetations also correlate with a climatic trends between typical raised bogs under attenuated oceanic influence in the north, and ombrominerotrophic hummocks in fen complexes in dryer and warmer, somewhat continental south. 9 associations are recognised among the vegetations present.

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“…L'identification du pollen, des frustules des diatomées, des macro-restes végétaux et animaux, des charbons de bois, etc... permet en effet un travail de reconstitution de l'évolution des paysages, principalement depuis la fin de la dernière glaciation, mais aussi de l'histoire des climats et des sociétés humaines qui les ont façonnés (Barber, 1993 ;Bourquin-Mignot et al, 1999 ;Charman, 2002 ;Cubizolle et al, 2004b).…”

unclassified

La patrimonialisation des zones humides

Sacca¹,

Cubizolle²

2008

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The mires of the Loire upstream catchment (Eastern Massif central): heritage value, phytocenotic interest and economic uses

Cited by 6 publications

References 3 publications

From natural to cultural mires during the last 15 ka years: An integrated approach comparing 14C ages on basal peat layers with geomorphological, palaeoecological and archaeological data (Eastern Massif Central, France)

From natural to cultural mires during the last 15 ka years: An integrated approach comparing 14C ages on basal peat layers with geomorphological, palaeoecological and archaeological data (Eastern Massif Central, France)

Communautés végétales des tourbières ombrotrophes du Massif central oriental (France)

La patrimonialisation des zones humides

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