GEOSCAN, résultats de la recherche


TitreSeabed mapping for integrated spatial management
AuteurKostylev, V E; Todd, B J; Shaw, J; Pickrill, R A
SourceICES Annual Science Conference 2007, abstracts; 2009 p. 118
Séries alt.Secteur des sciences de la Terre, Contribution externe 20080225
RéunionICES Annual Science Conference; Halifax, NS; CA; Septembre 22-26, 2008
Sujetstopographie du fond océanique; topographie du fond océanique; techniques de cartographie; peuplements biologiques; biomes; écosystèmes; écologie marine; bathymétrie; géologie marine; géophysique
ProgrammeLes géosciences à l'appui de la gestion des océans
Résumé(disponible en anglais seulement)
Integrated spatial management (ISM) of offshore lands has always been constrained by a lack of high-quality information on the marine ecosystem. Precisely positioned multibeam imagery has revolutionized marine spatial planning and to many people the objective was the production of high-resolution bathymetric maps. We argue that the objective-oriented geological interpretation of this high-resolution data provides invaluable contextual information for habitat management, design of marine protected areas, and assessment of potential impacts of multiple human activities. Such interpretation requires interdisciplinary effort, bringing together an understanding of geological, oceanographic, and ecological processes in the benthic boundary layer. Geological interpretation of high-resolution bathymetric data, augmented by geophysical surveys and groundtruthing, allows information about the texture and stratigraphy of sediment to be inferred, and the nature of seabed features (e.g. sedimentary bedforms, glacial moraines) and large homogeneous bottom areas to be characterized. It also provides data for physical and ecological modelling, resulting in new layers of information, such as natural rates of seabed disturbance or sensitivity of seabed to anthropogenic impacts. We demonstrate our approach using examples of seabed mapping projects from Atlantic Canada.