Serge Andréfouët

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21 Abstract 22 Ten IKONOS images of different coral reef sites distributed around the world were processed to assess the potential of 4-m resolution 23 multispectral data for coral reef habitat mapping. Complexity of reef environments, established by field observation, ranged from 3 to 15 24 classes of benthic habitats containing various combinations of(More)
Which populations are replenished primarily by immigrants (open) and which by local production (closed) remains an important question for management with implications for response to exploitation, protection, and disturbance. However, we lack methods for predicting population openness. Here, we develop a model for openness and show that considering habitat(More)
The occurrence of power law relationships in the spatial distribution of sedimentary lithotopes has been identified in both modern and ancient carbonate depositional bodies. In this study, facies patterns and their spatial relationships are investigated quantitatively in an Arabian Gulf shallow subtidal carbonate ramp setting, using a synergy of IKONOS(More)
The design of automatic systems dedicated to satellite image classification has received considerable attention. However, the current systems still cannot compare with human photo-interpreters. A promising approach consists in integrating structural knowledge into the classification process, i.e., using information about the shape of and the spatial(More)
Beyond the loss of species richness, human activities may also deplete the breadth of evolutionary history (phylogenetic diversity) and the diversity of roles (functional diversity) carried out by species within communities, two overlooked components of biodiversity. Both are, however, essential to sustain ecosystem functioning and the associated provision(More)
Seamounts are habitats of considerable interest in terms of conservation and biodiversity, and in terms of fisheries for bentho-pelagic and pelagic species. Twenty datasets on seamounts and bathymetry from different sources and scales (from individual cruise to worldwide satellite data) have been gathered to compile a detailed list of seamount features for(More)
Is it possible to derive accurately Total Suspended Matter concentration or its proxy, turbidity, from remote sensing data in tropical coastal lagoon waters? To investigate this question, hyperspectral remote sensing reflectance, turbidity and chlorophyll pigment concentration were measured in three coral reef lagoons. The three sites enabled us to get data(More)