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Long-term vegetation dynamics and land-use history: Providing a baseline for conservation strategies in protected Alnus glutinosa swamp woodlands / Brith Natlandsmyr in Forest ecology and management, vol 372 (15 July 2016)    

Public [article]  inForest ecology and management > vol 372 (15 July 2016) . - pp 78 - 92 Titre : Long-term vegetation dynamics and land-use history: Providing a baseline for conservation strategies in protected Alnus glutinosa swamp woodlands Type de document : Article/Communication Auteurs : Brith Natlandsmyr, Auteur ; Kari Loe Hjelle, Auteur Année de publication : 2016 Article en page(s) : pp 78 - 92 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Alnus glutinosa [Termes IGN] anthropisation [Termes IGN] biodiversité végétale [Termes IGN] dynamique de la végétation [Termes IGN] écosystème forestier [Termes IGN] état de conservation [Termes IGN] forêt ripicole [Termes IGN] marais [Termes IGN] Norvège [Vedettes matières IGN] Ecologie forestière Résumé : (auteur) Alnus glutinosa (alder) swamp woodlands are in danger of disappearing in Europe and, in Norway, several habitats with alder are threatened. Knowledge about the dynamics of alder swamp woodlands is crucial for the conservation and management of this vegetation. Our studied site, Rambjøra, in western Norway encompasses the Rambjøra Landscape Protected Area. We combined information from three sources—recent alder swamp woodland ecology, vegetation history, and agricultural history—to reveal the long-term vegetation dynamics of Rambjøra in relation to land-use. Dynamic changes in the predominance of forest or semi-natural grassland over 2800 years, concurrent with varying anthropogenic disturbances are inferred. At the investigated site, alder swamp woodland developed after forest clearance and changes in the water balance. The abundance of alder swamp woodlands have varied through time, increasing with low-impact land-use and declining with intensified use or abandonment. The highest biodiversity is found in periods with grazing, hay mowing, and probably fodder and fire wood collection. This indicates that agricultural practices of moderate intensity (grazing and hay cutting) should be part of the future management in order to maintain the biodiversity and meet the objective of the protection of Rambjøra. The study demonstrates the advantages of combining vegetation surveys, pollen records, and land-use history to provide a long-term perspective on vegetation development, and in our case also as an aid when establishing conservation strategies. Our findings need to be considered in future conservation and restoration of ecosystems with alder swamp woodlands. Numéro de notice : A2016--157 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1016/j.foreco.2016.03.049 En ligne : https://doi.org/10.1016/j.foreco.2016.03.049 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86981 [article]

Documents numériques

en open access Long-term vegetation dynamics ... - pdf éditeur Adobe Acrobat PDF

Vegetation classification and biogeography of European floodplain forests and alder carrs / Jan Douda in Applied Vegetation Science, vol 19 n° 1 (January 2016)  

Public [article]  inApplied Vegetation Science > vol 19 n° 1 (January 2016) . - pp 147 - 163 Titre : Vegetation classification and biogeography of European floodplain forests and alder carrs Type de document : Article/Communication Auteurs : Jan Douda, Auteur ; Karel Boublík, Auteur ; Michal Slezák, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 147 - 163 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Alnus (genre) [Termes IGN] Alnus glutinosa [Termes IGN] Alnus incana [Termes IGN] analyse de groupement [Termes IGN] biogéographie [Termes IGN] classification barycentrique [Termes IGN] classification dirigée [Termes IGN] Europe (géographie physique) [Termes IGN] forêt marécageuse [Termes IGN] forêt ripicole [Termes IGN] Fraxinus angustifolia [Termes IGN] Fraxinus excelsior [Termes IGN] Platanus orientalis [Termes IGN] Populus alba [Termes IGN] Populus nigra [Vedettes matières IGN] Ecologie forestière Résumé : (auteur) Aim : Formalized classifications synthesizing vegetation data at the continental scale are being attempted only now, although they are of key importance for nature conservation planning. Therefore, we aim to provide a vegetation classification and to describe the main biogeographical patterns of floodplain forests and alder carrs in Europe. Location : Europe. Methods : A database of more than 40 000 vegetation plots of floodplain forests and alder carrs across Europe was compiled. After geographic stratification, 16 392 plots were available for classification, which was performed using the supervised method Cocktail. We also searched for new associations using semi-supervised K-means classification. The main biogeographic patterns and climate-related gradients in species composition were determined using detrended correspondence analysis and cluster analysis. Results : Thirty associations of floodplain forests and alder carrs were distinguished, which belong to five alliances. The Alnion incanae includes riparian, seepage and hardwood floodplain forests in the nemoral and hemiboreal zones (dominated by Alnus glutinosa and Fraxinus excelsior) and in the boreal zone (dominated by A. incana). The Osmundo-Alnion represents oceanic vegetation dominated by Alnus glutinosa, Fraxinus angustifolia and F. excelsior distributed mostly on the Iberian Peninsula and composed of species with Atlantic distribution and Iberian endemics. The Populion albae comprises floodplain forests frequently dominated by Fraxinus angustifolia, Populus alba and P. nigra that are widespread in floodplains of large rivers under summer-dry climates in the Mediterranean region. The Platanion orientalis represents eastern Mediterranean floodplain forests dominated by Platanus orientalis. The Alnion glutinosae includes forest swamps dominated by Alnus glutinosa distributed mostly in the nemoral and hemiboreal zones. The main biogeographic patterns within European floodplain forests and alder carrs reflect the climatic contrasts between the Mediterranean, nemoral, boreal and mountain regions. Oceanic floodplain forests differ from those in the rest of Europe. The hydrological regime appears to be the most important factor influencing species composition within regions. Conclusions : This study is the first applying a formalized classification at the association level for a broad vegetation type at the continental scale. The proposed classification provides the scientific basis for the necessary improvement of the habitat classification systems used in European nature conservation. Numéro de notice : A2016-363 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1111/avsc.12201 En ligne : http://dx.doi.org/10.1111/avsc.12201 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81102 [article]

A fully-automated approach to land cover mapping with airborne LiDAR and high resolution multispectral imagery in a forested suburban landscape / Jason R. Parent in ISPRS Journal of photogrammetry and remote sensing, vol 104 (June 2015)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 104 (June 2015) . - pp 18 - 29 Titre : A fully-automated approach to land cover mapping with airborne LiDAR and high resolution multispectral imagery in a forested suburban landscape Type de document : Article/Communication Auteurs : Jason R. Parent, Auteur ; John C. Volin, Auteur ; Daniel L. Civco, Auteur Année de publication : 2015 Article en page(s) : pp 18 - 29 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] carte d'occupation du sol [Termes IGN] classification automatique [Termes IGN] classification pixellaire [Termes IGN] Connecticut (Etats-Unis) [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] feuillu [Termes IGN] forêt ripicole [Termes IGN] image multibande [Termes IGN] Pinophyta Résumé : (auteur) Information on land cover is essential for guiding land management decisions and supporting landscape-level ecological research. In recent years, airborne light detection and ranging (LiDAR) and high resolution aerial imagery have become more readily available in many areas. These data have great potential to enable the generation of land cover at a fine scale and across large areas by leveraging 3-dimensional structure and multispectral information. LiDAR and other high resolution datasets must be processed in relatively small subsets due to their large volumes; however, conventional classification techniques cannot be fully automated and thus are unlikely to be feasible options when processing large high-resolution datasets. In this paper, we propose a fully automated rule-based algorithm to develop a 1 m resolution land cover classification from LiDAR data and multispectral imagery. The algorithm we propose uses a series of pixel- and object-based rules to identify eight vegetated and non-vegetated land cover features (deciduous and coniferous tall vegetation, medium vegetation, low vegetation, water, riparian wetlands, buildings, low impervious cover). The rules leverage both structural and spectral properties including height, LiDAR return characteristics, brightness in visible and near-infrared wavelengths, and normalized difference vegetation index (NDVI). Pixel-based properties were used initially to classify each land cover class while minimizing omission error; a series of object-based tests were then used to remove errors of commission. These tests used conservative thresholds, based on diverse test areas, to help avoid over-fitting the algorithm to the test areas. The accuracy assessment of the classification results included a stratified random sample of 3198 validation points distributed across 30 1 × 1 km tiles in eastern Connecticut, USA. The sample tiles were selected in a stratified random manner from locations representing the full range of rural to urban landscapes in eastern Connecticut. The overall land cover accuracy was 93% with accuracies exceeding 90% for deciduous trees, low vegetation, water, buildings, and low impervious cover. Slight confusion occurred between coniferous and deciduous trees; major confusion occurred between water and riparian wetlands; and moderate confusion occurred between medium vegetation and other vegetation classes. The algorithm was robust for the forested suburban landscape of eastern Connecticut, which is typical for much of the northeastern U.S., and the algorithm shows promise for applications in similar landscapes with similar datasets. Further research is needed to test the applicability of the algorithm to more diverse landscapes as well as with different LiDAR and multispectral datasets. Numéro de notice : A2015-698 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2015.02.012 En ligne : https://doi.org/10.1016/j.isprsjprs.2015.02.012 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78334 [article]

Distribution, données floristiques et architecture des boisements du delta du Rhône (sud-est de la France) / Annik Schnitzler in Ecologia mediterranea, vol 40 n° 2 (2014)    

Public [article]  inEcologia mediterranea > vol 40 n° 2 (2014) . - pp 77 - 92 Titre : Distribution, données floristiques et architecture des boisements du delta du Rhône (sud-est de la France) Type de document : Article/Communication Auteurs : Annik Schnitzler, Auteur Année de publication : 2014 Article en page(s) : pp 77 - 92 Note générale : bibliographie Langues : Français (fre) Descripteur : [Termes IGN] Arles [Termes IGN] chênaie [Termes IGN] composition floristique [Termes IGN] distribution spatiale [Termes IGN] état de conservation [Termes IGN] forêt dunaire [Termes IGN] forêt ripicole [Termes IGN] frênaie [Termes IGN] ormeraie [Termes IGN] parc naturel régional de Camargue [Termes IGN] peupleraie [Termes IGN] phytosociologie [Termes IGN] pineraie [Termes IGN] Rhône, delta du [Termes IGN] saulaie [Termes IGN] unité phytosociologique [Vedettes matières IGN] Ecologie forestière Résumé : (auteur) Le delta du Rhône comporte de nombreux boisements éparpillés au sein d’espaces ouverts, en Grande et en Petite Camargue, ainsi qu’au Plan du Bourg. Ces boisements ont été étudiés du point de vue phytosociologique et architectural. Ils appartiennent à 5 associations forestières différentes. Trois sont des forêts alluviales typiques des bordures de grands fleuves (peupleraie blanche, saulaie blanche, frênaie-ormaie à peuplier blanc) et deux sont des forêts dunaires (chênaie mixte, chênaie-pineraie). La richesse floristique globale est de 109 espèces. Sur les 22 sites retenus, les forêts de Quincandon (114 ha), Tourtoulen (44 ha), mas Saint-Georges (45 ha), Arles (40 ha), Beaujeu (25 ha) sont les plus étendues. Les autres sites occupent de petites surfaces (entre 1 et 5 ha). Leur état de conservation dépend des usages du passé et de leur statut de protection actuel. Les plus intéressantes sont celles qui sont les plus anciennes, les plus étendues et les moins exploitées par l’homme. En dépit de leurs différences floristiques, les forêts étudiées ont toutes des canopées lacuneuses, caractérisées par de larges ouvertures, expliquant les valeurs élevées d’ouverture de canopée et d’indices foliaires. La frênaie- ormaie du mas Saint-Georges, la peupleraie blanche très âgée (plus de 150 ans) de l’île de Saxy et la pineraie-chênaie de Quincandon occupent des superficies conséquentes et bénéficient de gestion extensive ou de non-gestion, ce qui explique leur richesse en gros arbres et en bois mort. Mais globalement, bien des boisements de la Camargue incluent encore de très gros arbres (chênes, peupliers noirs et blancs). Ces boisements bénéficient de statuts de protection divers, qui vont de la protection contre les défrichements à la réserve intégrale, mais mériteraient d’être mieux protégés pour certains d’entre eux. Numéro de notice : A2014-805 Affiliation des auteurs : non IGN Thématique : BIODIVERSITE/FORET Nature : Article DOI : sans En ligne : https://www.persee.fr/doc/ecmed_0153-8756_2014_num_40_2_1260 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84656 [article]

Documents numériques

en open access boisements du delta du Rhône Adobe Acrobat PDF

Phytosociological overview of the Italian Alnus incana-rich riparian woods / G. Sburlino in Plant sociology, vol 49 n° 1 (June 2012)    

Public [article]  inPlant sociology > vol 49 n° 1 (June 2012) . - pp 39 - 53 Titre : Phytosociological overview of the Italian Alnus incana-rich riparian woods Type de document : Article/Communication Auteurs : G. Sburlino, Auteur ; L. Poldini, Auteur ; C. Andreis, Auteur ; L. Giovagnoli, Auteur ; S. Tasinazzo, Auteur Année de publication : 2012 Article en page(s) : pp 39 - 53 Note générale : Bibliographie, tableaux phytosociologiques Langues : Anglais (eng) Descripteur : [Termes IGN] Alnus incana [Termes IGN] forêt ripicole [Termes IGN] Italie [Termes IGN] phytosociologie [Termes IGN] unité phytosociologique [Vedettes matières IGN] Ecologie forestière Résumé : (Auteur) On the basis of data both new and coming from the literature, the Italian grey alder riparian woods were studied from the syntaxonomic point of view. The floristic-sociological analysis of 119 relevés coming from northern Italy and the comparison with phytosociological tables from neighboring areas (Slovenia, Croatia, Austria, southern Germany and Switzerland) pointed out the occurrence of two distinct associations belonging to Alnion incanae and Fagetalia: the colline-submontane Primulo vulgaris-Alnetum incanae ass. nova and the montane-high montane Aceri-Alnetum incanae. Both these associations are distributed throughout northern Italy and reach their southern limit of distribution in the Tuscan-Emilian Appenines. Numéro de notice : A2012-727 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.7338/pls2012491/02 En ligne : http://dx.doi.org/10.7338/pls2012491/02 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89062 [article]

Documents numériques

en open access Phytosociological overview Adobe Acrobat PDF

Le phytomanagement, protection et dépollution des eaux et des sols : un état des connaissances et des pratiques en France / François Charnet in Revue forestière française, vol 61 n° 5 (septembre - octobre 2009)  

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Développement d'une méthode de cartographie de l'occupation du sol le long des cours d'eau à partir de données de télédétection / M. Perez Correa (2004)

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Valeur phytoécologique et biologique des ripisylves méditerranéennes / Pierre Quézel in Forêt méditerranéenne, vol 24 n° 3 (septembre 2003)  

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Développement et mise en application d'une interface de PIAO de la végétation du lit de la Loire et de l'Allier / S. Ancel (2002)

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Gestion intégrée de la chênaie verte méditerranéenne : Application à deux massifs de la région Languedoc-Roussillon / Georges de Maupeou in Revue forestière française, vol 54 n° 1 (janvier - février 2002)  

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Etat et évolution du bassin versant et du lit majeur du Gave de Pau observé par télédétection / M. Deniel (13/01/1988)

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Les ripisylves à Aulne glutineux et Tilleul cordé en Provence orientale / Roger Loisel in Annales de la Société des sciences naturelles de Toulon et du Var, vol 35 n° 3 (1983)

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