c2378bfa-c2b2-4cae-8d48-d982c7a81290 eng Guitet, Stéphane Office national des forêts (ONF) stephane.guitet@onf.fr Brunaux, Olivier Office national des forêts (ONF) olivier.brunaux@onf.fr Descroix, Laurent Office national des forêts (ONF) laurent.descroix@onf.fr AMAP géoportail Institut de recherche pour le développement (IRD) amap.geoportail@ird.fr 2025-01-28T06:00:13 ISO 19115:2003/19139 1.0 WGS 84 / UTM zone 22N (EPSG:32622) EPSG 7.9 Habitats: transects to sample the local environmental variability in French Guiana since 2005. 2005-11-01 ONF_Habitats_All Habitats inventories have been installed over the years in French Guiana using a standardized multi-scale protocol. In each site, we established two to four transects, about 2.5 to 3-km long in different directions to optimally sample the local environmental variability. Each 20-m width transect was divided into 100 m segments so that the basic sampling units are 0.2-ha plots. All the plots were geo-referenced using a Garmin 76CSx GPS receiver and delineated in the field using a Vertex laser clinometer. In each plot, all trees (including palm-trees) greater than 20 cm diameter at breast height (DBH) or above the buttresses were identified by local forest-plotters from ONF. They referred to a vernacular nomenclature whose names correspond either to a botanical species, genus or family. Tested against true botanical data on 4279 trees (Guitet et al., 2014), this nomenclature proved 83% effective accuracy at the family level and 74% at the level of the most precise botanical equivalent of our vernacular names (i.e. the species, genus or family level depending on the precision reached by forest-plotters). Soil samples were also collected in 490 selected plots representative of the different topographical positions along each transect. Chemical and textural analyses are available. Plants of the under-storey have been collected by IRD in several 5m x 5m sub-plots on different sites : Kourouaï, Piton Baron, Aïmara, Saut Parasol, Mont Itoupé, Waki, Toponowini, Bagote, Haute Beiman, Roche Koutou, Regina. Standardized line transects surveys were conducted by ONCFS in 25 sites on the same transects in order to record large mammals and terrestrial birds. Transects were walked at less than 1 kmh-1 speed every morning (7:00-11:00) and afternoon (14:30-18:00) by only one observer by trail, systematically alternating transects on consecutive days to avoid observer bias. All encounters of focus species and their localization on the trail were systematically recorded and the perpendicular distance between animal and transect was measured with a laser ranger finder to the nearest meter. Guitet, Stéphane Office national des forêts (ONF) stephane.guitet@onf.fr Brunaux, Olivier Office national des forêts (ONF) olivier.brunaux@onf.fr Descroix, Laurent Office national des forêts (ONF) laurent.descroix@onf.fr http://vmamapgn-test.mpl.ird.fr/geonetwork/srv/eng/resources.get?uuid=c2378bfa-c2b2-4cae-8d48-d982c7a81290&fname=ONF_transects_Site_Points_s.png thumbnail png http://vmamapgn-test.mpl.ird.fr/geonetwork/srv/eng/resources.get?uuid=c2378bfa-c2b2-4cae-8d48-d982c7a81290&fname=ONF_transects_Site_Points.png large_thumbnail png Habitats and biotopes GEMET - INSPIRE themes, version 1.0 INSPIRE themes 2008-06-01 geonetwork.thesaurus.external.theme.inspire-theme Americas South America France French Guiana Geounits 2016-01-01 geonetwork.thesaurus.external.place.ird_geounits biodiversity forest ecosystem primary forest forest resource assessment forest conservation natural forest tropical forest ecosystem tropical forest soil biogeography GEMET - Concepts, version 2.4 2010-01-13 geonetwork.thesaurus.external.theme.gemet local coverage labex CEBA dispositifs forestiers HABITATS labex CEBA sampling plots multiscale network forest structure tropical forest types forest composition soil diameter measurements tree community tree flora species distribution biogeographical regions Aïmara Camp Caïman Crique Bagot Crique Bastien Centre Spatial Guyanais Crique Armontabo Crique Plomb Eau Blanche Galibi Grillon Haute Beiman Haute Matarony Inéry Kourouaï Limonade Manaré Maripa Mont Itoupé Montagne Tortue Nouragues Paracou Pic du Grand Croissant Piton Baron Piton de l'Armontabo Quartzites Régina Roche Koutou Sables Blancs Saint Michel Saut Parasol Toponowini Trinité Waki Yaroupi Please get in touch with a point of contact. Agreement between potential user and point of contact. 5000 fre biota geoscientificInformation -54.1868 -52.0685 2.47676 5.48271 2005-11-01 Shapefile 10.1 Under development.