caa a22 4500 605527849 CHVBK 20210128100810.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s10531-014-0854-8 doi (NATIONALLICENCE)springer-10.1007/s10531-014-0854-8 Geomorphological landscape features explain floristic patterns in French Guiana rainforest [Elektronische Daten] [Stéphane Guitet, Raphaël Pélissier, Olivier Brunaux, Gaëlle Jaouen, Daniel Sabatier] Geomorphic landscape features have been suggested as indicators of forest diversity. However, their explanatory power has not yet been explicitly tested at a regional scale in tropical rainforest. We used forest inventories conducted according to a stratified sampling design (3,132 plots in 111 transects at 33 sites) and holistic multi-scale geomorphological mapping derived from a Shuttle Radar Topography Mission digital elevation model to describe and explain spatial patterns in floristic composition across French Guiana (80,000km2). We measured and identified 123,906 trees with DBH ≥20cm and used constrained and unconstrained ordinations to analyze variations in the abundance of 221 taxa and 51 families. Variance partitioning and variograms were used to detect spatial patterns in species composition, compare the explanatory power of spatial and environmental factors, and select the variables that best explain forest composition. Strong floristic patterns corresponded to a major latitudinal gradient and significant sub-regional floristic structure. Geomorphological landscapes shaped by historic climate fluctuations and major geological events successfully captured these patterns and explained the variation in abundance of 80 taxa, corresponding to 65% of the inventoried trees. Our findings suggest that long-term forest dynamics are under substantial "geomorphographic control”. A geomorphological perspective on landscapes that incorporates current and past environmental filters and historical biogeographical processes could thus be used more systematically in tropical regions for regional planning and forest conservation. Springer Science+Business Media Dordrecht, 2014 Tree community nationallicence Landscapes nationallicence Geodiversity nationallicence Species distribution nationallicence Geomorphology nationallicence Guitet Stéphane INRA, UMR Amap, TA A51/PS2, 34398, Montpellier cedex 5, France aut Pélissier Raphaël IRD, UMR Amap, TA A51/PS2, 34398, Montpellier Cedex 5, France aut Brunaux Olivier ONF, R&D, Réserve de Montabo, BP 7002, 97307, Cayenne Cedex, Guyane Française aut Jaouen Gaëlle UMR EcoFoG, AgroParisTech, Campus agronomique, Guyane Française, BP 316, 97310, Kourou, France aut Sabatier Daniel IRD, UMR Amap, TA A51/PS2, 34398, Montpellier Cedex 5, France aut Biodiversity and Conservation Springer Netherlands 24/5(2015-05-01), 1215-1237 0960-3115 24:5<1215 2015 24 10531 https://doi.org/10.1007/s10531-014-0854-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10531-014-0854-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Guitet Stéphane INRA, UMR Amap, TA A51/PS2, 34398, Montpellier cedex 5, France aut NATIONALLICENCE 700 1- Pélissier Raphaël IRD, UMR Amap, TA A51/PS2, 34398, Montpellier Cedex 5, France aut NATIONALLICENCE 700 1- Brunaux Olivier ONF, R&D, Réserve de Montabo, BP 7002, 97307, Cayenne Cedex, Guyane Française aut NATIONALLICENCE 700 1- Jaouen Gaëlle UMR EcoFoG, AgroParisTech, Campus agronomique, Guyane Française, BP 316, 97310, Kourou, France aut NATIONALLICENCE 700 1- Sabatier Daniel IRD, UMR Amap, TA A51/PS2, 34398, Montpellier Cedex 5, France aut NATIONALLICENCE 773 0- Biodiversity and Conservation Springer Netherlands 24/5(2015-05-01), 1215-1237 0960-3115 24:5<1215 2015 24 10531