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Assessing the impacts of canopy openness and flight parameters on detecting a sub-canopy tropical invasive plant using a small unmanned aerial system / Ryan L. Perroy in ISPRS Journal of photogrammetry and remote sensing, vol 125 (March 2017)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 125 (March 2017) . - pp 174 - 183 Titre : Assessing the impacts of canopy openness and flight parameters on detecting a sub-canopy tropical invasive plant using a small unmanned aerial system Type de document : Article/Communication Auteurs : Ryan L. Perroy, Auteur ; Timo Sullivan, Auteur ; Nathan Stephenson, Auteur Année de publication : 2017 Article en page(s) : pp 174 - 183 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] acquisition d'images [Termes IGN] drone [Termes IGN] espèce exotique envahissante [Termes IGN] migration de plantes [Termes IGN] plan de vol [Termes IGN] sous-étage Résumé : (Auteur) Small unmanned aerial systems (sUAS) have great potential to facilitate the early detection and management of invasive plants. Here we show how very high-resolution optical imagery, collected from small consumer-grade multirotor UAS platform at altitudes of 30–120 m above ground level (agl), can be used to detect individual miconia (Miconia calvescens) plants in a highly invaded tropical rainforest environment on the island of Hawai‘i. The central aim of this research was to determine how overstory vegetation cover, imagery resolution, and camera look-angle impact the aerial detection of known individual miconia plants. For our finest resolution imagery (1.37 cm ground sampling distance collected at 30 m agl), we obtained a 100% detection rate for sub-canopy plants with above-crown openness values >40% and a 69% detection rate for those with >20% openness. We were unable to detect any plants with Numéro de notice : A2017-074 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2017.01.018 En ligne : http://dx.doi.org/10.1016/j.isprsjprs.2017.01.018 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84324 [article]

Exemplaires(3)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-2017031	RAB	Revue	Centre de documentation	En réserve L003	Disponible
081-2017033	DEP-EXM	Revue	LASTIG	Dépôt en unité	Exclu du prêt
081-2017032	DEP-EAF	Revue	Nancy	Dépôt en unité	Exclu du prêt

Ecological constraints increase the climatic debt in forests / Romain Bertrand in Nature communications, vol 7 (2016)  

Public [article]  inNature communications > vol 7 (2016) . - n° 12643 (2016) Titre : Ecological constraints increase the climatic debt in forests Type de document : Article/Communication Auteurs : Romain Bertrand, Auteur ; Gabriela Riofrío-Dillon, Auteur ; Jonathan Lenoir, Auteur ; Jacques Drapier , Auteur ; Patrice de Ruffray, Auteur ; Jean-Claude Gégout, Auteur ; Michel Loreau, Auteur Année de publication : 2016 Projets : TULIP / Roux, Fabrice Article en page(s) : n° 12643 (2016) Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] changement climatique [Termes IGN] écologie forestière [Termes IGN] France (administrative) [Termes IGN] migration de plantes [Termes IGN] phytosociologie [Vedettes matières IGN] Végétation et changement climatique Résumé : (auteur) Biodiversity changes are lagging behind current climate warming. The underlying determinants of this climatic debt are unknown and yet critical to understand the impacts of climate change on the present biota and improve forecasts of biodiversity changes. Here we assess determinants of climatic debt accumulated in French forest herbaceous plant communities between 1987 and 2008 (that is, a 1.05 °C mean difference between the observed and bioindicated temperatures). We show that warmer baseline conditions predispose plant communities to larger climatic debts, and that climate warming exacerbates this response. Forest plant communities, however, are absorbing part of the temperature increase mainly through the species’ ability to tolerate changing climate. As climate warming is expected to accelerate during the twenty-first century, plant migration and tolerance to climatic stresses probably will be insufficient to absorb this impact posing threats to the sustainability of forest plant communities. Numéro de notice : A2016-716 Affiliation des auteurs : IGN+Ext (2012-2019) Thématique : BIODIVERSITE/FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1038/ncomms12643 Date de publication en ligne : 26/08/2016 En ligne : http://dx.doi.org/10.1038/ncomms12643 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82120 [article]