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Comparing the performance of flat and hierarchical Habitat/Land-Cover classification models in a NATURA 2000 site / Yoni Gavish in ISPRS Journal of photogrammetry and remote sensing, vol 136 (February 2018)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 136 (February 2018) . - pp 1 - 12 Titre : Comparing the performance of flat and hierarchical Habitat/Land-Cover classification models in a NATURA 2000 site Type de document : Article/Communication Auteurs : Yoni Gavish, Auteur ; Jerome O’Connell, Auteur ; Charles J. Marsh, Auteur ; Cristina Tarantino, Auteur ; Palma Blonda, Auteur ; Valeria Tomaselli, Auteur ; William E. Kunin, Auteur Année de publication : 2018 Article en page(s) : pp 1 - 12 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes descripteurs IGN] analyse comparative [Termes descripteurs IGN] classification [Termes descripteurs IGN] classification par forêts aléatoires [Termes descripteurs IGN] EUropean Nature Information System [Termes descripteurs IGN] habitat (nature) [Termes descripteurs IGN] occupation du sol [Termes descripteurs IGN] performance [Termes descripteurs IGN] site Natura 2000 Résumé : (Auteur) The increasing need for high quality Habitat/Land-Cover (H/LC) maps has triggered considerable research into novel machine-learning based classification models. In many cases, H/LC classes follow pre‐defined hierarchical classification schemes (e.g., CORINE), in which fine H/LC categories are thematically nested within more general categories. However, none of the existing machine-learning algorithms account for this pre-defined hierarchical structure. Here we introduce a novel Random Forest (RF) based application of hierarchical classification, which fits a separate local classification model in every branching point of the thematic tree, and then integrates all the different local models to a single global prediction. We applied the hierarchal RF approach in a NATURA 2000 site in Italy, using two land-cover (CORINE, FAO-LCCS) and one habitat classification scheme (EUNIS) that differ from one another in the shape of the class hierarchy. For all 3 classification schemes, both the hierarchical model and a flat model alternative provided accurate predictions, with kappa values mostly above 0.9 (despite using only 2.2–3.2% of the study area as training cells). The flat approach slightly outperformed the hierarchical models when the hierarchy was relatively simple, while the hierarchical model worked better under more complex thematic hierarchies. Most misclassifications came from habitat pairs that are thematically distant yet spectrally similar. In 2 out of 3 classification schemes, the additional constraints of the hierarchical model resulted with fewer such serious misclassifications relative to the flat model. The hierarchical model also provided valuable information on variable importance which can shed light into “black-box” based machine learning algorithms like RF. We suggest various ways by which hierarchical classification models can increase the accuracy and interpretability of H/LC classification maps. Numéro de notice : A2018-071 Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2017.12.002 date de publication en ligne : 05/02/2018 En ligne : https://doi.org/10.1016/j.isprsjprs.2017.12.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89430 [article]

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Synergetic use of Sentinel-1 and Sentinel-2 for assessments of heathland conservation status / Johannes Schmidt in Remote sensing in ecology and conservation, vol inconnu ([01/11/2017])    

Public [article]  inRemote sensing in ecology and conservation > vol inconnu [01/11/2017] Titre : Synergetic use of Sentinel-1 and Sentinel-2 for assessments of heathland conservation status Type de document : Article/Communication Auteurs : Johannes Schmidt, Auteur ; Fabian E. Fassnacht, Auteur ; Michael Förster, Auteur ; Sebastian Schmidtlein, Auteur Année de publication : 2017 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes descripteurs IGN] Calluna vulgaris [Termes descripteurs IGN] directive européenne [Termes descripteurs IGN] état de conservation [Termes descripteurs IGN] habitat (nature) [Termes descripteurs IGN] image Sentinel-SAR [Termes descripteurs IGN] site Natura 2000 Résumé : (auteur) Habitat quality assessments often demand wall-to-wall information about the state of vegetation. Remote sensing can provide this information by capturing optical and structural attributes of plant communities. Although active and passive remote sensing approaches are considered as complementary techniques, they have been rarely combined for conservation mapping. Here, we combined spaceborne multispectral Sentinel-2 and Sentinel-1 SAR data for a remote sensing-based habitat quality assessment of dwarf shrub heathland, which was inspired by nature conservation field guidelines. Therefore, three earlier proposed quality layers representing (1) the coverage of the key dwarf shrub species, (2) stand structural diversity and (3) an index reflecting co-occurring vegetation were mapped via linking in situ data and remote sensing imagery. These layers were combined in an RGB-representation depicting varying stand attributes, which afterwards allowed for a rule-based derivation of pixel-wise habitat quality classes. The links between field observations and remote sensing data reached correlations between 0.70 and 0.94 for modeling the single quality layers. The spatial patterns shown in the quality layers and the map of discrete quality classes were in line with the field observations. The remote sensing-based mapping of heathland conservation status showed an overall agreement of 76% with field data. Transferring the approach in time (applying a second set of Sentinel-1 and -2 data) caused a decrease in accuracy to 73%. Our findings suggest that Sentinel-1 SAR contains information about vegetation structure that is complimentary to optical data and therefore relevant for nature conservation. While we think that rule-based approaches for quality assessments offer the possibility for gaining acceptance in both communities applied conservation and remote sensing, there is still need for developing more robust and transferable methods. Numéro de notice : A2018-005 Thématique : BIODIVERSITE/FORET Nature : Article DOI : 10.1002/rse2.68 En ligne : https://doi.org/10.1002/rse2.68 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88738 [article]

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en open access Synergetic use of Sentinel-1 and Sentinel-2 - pdf éditeur Adobe Acrobat PDF

Natura 2000 protected habitats, Massaciuccoli Lake (northern Tuscany, Italy) / Daniele Viciani in Journal of maps, vol 13 n° 2 (2017)  

Public [article]  inJournal of maps > vol 13 n° 2 (2017) . - pp 219 - 229 Titre : Natura 2000 protected habitats, Massaciuccoli Lake (northern Tuscany, Italy) Type de document : Article/Communication Auteurs : Daniele Viciani, Auteur Année de publication : 2017 Article en page(s) : pp 219 - 229 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes descripteurs IGN] carte thématique [Termes descripteurs IGN] habitat (nature) [Termes descripteurs IGN] politique de conservation (biodiversité) [Termes descripteurs IGN] site Natura 2000 [Termes descripteurs IGN] système d'information géographique [Termes descripteurs IGN] Toscane (Italie) [Termes descripteurs IGN] unité phytosociologique [Termes descripteurs IGN] zone humide Résumé : (auteur) The Massaciuccoli Lake (northern Tuscany, Italy) Natura 2000 habitat map (1:10,000) was compiled from photo-interpretation and recent phytosociological studies, integrated by field surveys of the vegetation units. Conventional geographical information system procedures were used to select and manage spatial information. The following attributes were assigned to each map polygon: (i) vegetation type, (ii) habitat typology and (iii) percentage cover of the habitat type. Habitat types covering polygons smaller than 50 m2 were treated as points. A total of nine Natura 2000 habitat types were identified and mapped; they cover almost 20% of the study area. The results show that of all sites on the Italian peninsula, Lake Massaciuccoli Calcareous fens with Cladium mariscus covers the largest surface area and is crucial for the national conservation of this habitat type. It is also of priority importance in Europe. Numéro de notice : A2017-800 Thématique : FORET/GEOMATIQUE Nature : Article En ligne : https://doi.org/10.1080/17445647.2017.1290557 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89124 [article]

Effectiveness of Natura 2000 network in Romanian Alpine Biogeographical Region: an assessment based on forest landscape connectivity / Mihaita Iulian Niculae in Annals of forest research, vol 60 n° 1 (January - June 2017)  

Public [article]  inAnnals of forest research > vol 60 n° 1 (January - June 2017) . - pp 19 - 32 Titre : Effectiveness of Natura 2000 network in Romanian Alpine Biogeographical Region: an assessment based on forest landscape connectivity Type de document : Article/Communication Auteurs : Mihaita Iulian Niculae, Auteur ; Sorin Avram, Auteur ; Gabriel Ovidiu Vanau, Auteur ; Maria Patroescu, Auteur Année de publication : 2017 Article en page(s) : pp 19 - 32 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] connexité (topologie) [Termes descripteurs IGN] corridor biologique [Termes descripteurs IGN] forêt tempérée [Termes descripteurs IGN] graphe [Termes descripteurs IGN] politique de conservation (biodiversité) [Termes descripteurs IGN] Roumanie [Termes descripteurs IGN] site Natura 2000 [Vedettes matières IGN] Ecologie forestière Résumé : (auteur) Maintaining and increasing landscape connectivity, especially of forest landscapes, are some of the main concerns regarding biodiversity conservation. The connectivity of protected areas for different species represents an indicator for evaluating the effectiveness of the Natura 2000 network. Our research aims to evaluate the connectivity of forest landscapes in the Romanian Alpine Biogeographical Region (ABR) for various terrestrial species. We analysed the distribution of forest patches and Sites of Community Importance (SCI), as part of Natura 2000 network, in the Romanian ABR. We evaluated the connectivity of forest patches for terrestrial species with different dispersal distances, identifying those patches with significant contribution to maintain the forest landscape connectivity, through the graph theory approach. To quantify the importance of each node, we evaluated the dPCconnector fraction derived from the dPC index. Of the 125 SCIs in the Romanian ABR, 71 protected areas have over 1000 ha, four of them have more than 100,000 ha. The total protected surfaces cover ~35% of the Romanian ABR, and the forest surfaces, protected in SCIs, cover 26% of the total Romanian ABR. Regarding the connectivity scores, we found that the forest surfaces across the ABR are well connected (0.89 or 1 for different dispersal distances) in comparison with the Natura 2000 forest patches. The forest patches are well connected especially for the species with large dispersal distance in both cases (d = 25 km). For the species characterized by a small dispersion distance, the connectivity is lower (0.46) in the case of protected forests. Our results evidence that the connectivity objective of the forest surfaces protected through the Nature 2000 network is not totally achieved. Furthermore new protected areas are needed where the forest are still present for increasing landscape connectivity for species. Numéro de notice : A2017-610 Thématique : BIODIVERSITE/FORET Nature : Article DOI : 10.15287/afr.2016.793 En ligne : http://doi.org/10.15287/afr.2016.793 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86918 [article]

A methodological protocol for Annex I Habitats monitoring: the contribution of Vegetation science / D. Gigante in Plant sociology, vol 53 n° 2 (December 2016) 

Public [article]  inPlant sociology > vol 53 n° 2 (December 2016) . - pp 77 - 87 Titre : A methodological protocol for Annex I Habitats monitoring: the contribution of Vegetation science Type de document : Article/Communication Auteurs : D. Gigante, Auteur ; F. Attorre, Auteur ; R. Venanzoni, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 77 - 87 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] biodiversité [Termes descripteurs IGN] directive européenne [Termes descripteurs IGN] habitat (nature) [Termes descripteurs IGN] Italie [Termes descripteurs IGN] phytosociologie [Termes descripteurs IGN] politique de conservation (biodiversité) [Termes descripteurs IGN] site Natura 2000 [Termes descripteurs IGN] unité phytosociologique [Vedettes matières IGN] Ecologie forestière Résumé : (auteur) The methodological foundations of the recently published Manual for Annex I Habitats monitoring in Italy, edited by the Italian Institute for Environmental Protection and Research (ISPRA) with the scientific support of the Italian Society for Vegetation Science (SISV), are here presented, discussed and related to the most consolidated and acknowledged scientific advances in the field of Vegetation science. The proposed methodologies aim at offering simple, yet effective, protocols and procedures towards a harmonized data collection, by way of standardized and shared technical tools, resulting in comparable evaluations of the conservation status of Annex I Habitats. The methodological framework was developed by experts including a large team of members of the SISV. Big efforts were deployed to provide indicators and parameters for biodiversity monitoring able to catch its complexity, yet simple enough to be easily measured. Diagnosis and syntaxonomical correspondences of Habitat types, sampling procedure, plot size, distribution mapping, typical species are among the principal issues here examined through a widely shared scientific discussion. The final product is a comprehensive Manual, which offers practical but scientifically sound methodological tools for an efficient and effective monitoring of Annex I Habitats. The importance of bridging across the science-policy interface is emphasized, in a general will to improve the impact of Vegetation science on conservation policy development in Europe. Numéro de notice : A2016--112 Thématique : BIODIVERSITE/FORET Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84762 [article]

Documents numériques

en open access A methodological protocol for Annex I Habitats monitoring Adobe Acrobat PDF

État de conservation des habitats forestiers d’intérêt communautaire, Evaluation à l’échelle du site Natura 2000, Tome 1. Définitions, concepts et éléments d’écologie / Lise Maciejewski (2016) 

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État de conservation des habitats forestiers d’intérêt communautaire, Evaluation à l’échelle du site Natura 2000, Tome 2. Guide d’application / Lise Maciejewski (2016) 

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État de conservation des habitats : propositions de définitions et de concepts pour l’évaluation à l’échelle d’un site Natura 2000 / Lise Maciejewski in Revue d'écologie, vol 71 n° 1 (janvier - mars 2016) 

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Assessing the cost-effectiveness of a biodiversity conservation policy: A bio-econometric analysis of Natura 2000 contracts in forest / Emeline Hily in Ecological economics, vol 119 (November 2015)  

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Modélisation d’accompagnement en gestion conservatoire : Expérimentation au sein du réseau français Natura 2000 / Hélène Dupont in Revue internationale de géomatique, vol 25 n° 4 (octobre - décembre 2015)

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Determination of the spatial structure of vegetation on the repository of the mine “Fryderyk” in Tarnowskie Góry, based on airborne laser scanning from the ISOK project and digital orthophotomaps / Marta Szostak in Geodesy and cartography, vol 64 n° 1 (June 2015)  

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Automatisation des cartes d’incidences Natura 2000 sur le Massif de Fontainebleau / Yann Petit (2015) 

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Document d’objectifs Natura 2000 Chenaie verte et juniperaie de la Tartagine / A. Rinascita (2015) 

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Visualization, statistical analysis, and mining of historical vessel data / Sabarish Senthilnathan Muthu (2015)  

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Corbières orientales : cartographie des habitats d'espèces de la directive oiseaux à partir de données de téléldétection / Vincent Parmain in Rendez-vous techniques, n° 32 (printemps 2011) 

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