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TitreBenthic habitat mapping and sediment nutrient cycling in a shallow coastal environment of Nova Scotia, Canada
TéléchargerTéléchargement (publication entière)
AuteurBravo, F; Grant, J; Barrell, J
SourceProgram and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada; par Todd, B J; Brown, C J; Lacharité, M; Gazzola, V; McCormack, E; Commission géologique du Canada, Dossier public 8295, 2017 p. 39, https://doi.org/10.4095/305422 (Accès ouvert)
LiensGeoHab 2017
Année2017
ÉditeurRessources naturelles Canada
Réunion2017 GeoHab: Marine Geological and Biological Habitat Mapping; Dartmouth, NS; CA; mai 1-4, 2017
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/305422
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Todd, B J; Brown, C J; Lacharité, M; Gazzola, V; McCormack, E; (2017). Program and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada, Commission géologique du Canada, Dossier public 8295
Formatspdf
ProvinceNouvelle-Écosse
Sujetsmilieux marins; études côtières; conservation; organismes marins; écologie marine; gestion des ressources; écosystèmes; planification; benthos; faciès sédimentaires; sédiments marins; dépôts infralittoraux; géochimie des sédiments marins; établissement de modèles; échantillons prélevés au hasard; carottes de sédiment marin; échantillons carrotés; levés géophysiques; levés acoustiques marins; photographie; gestion côtière; biogéochimie; biologie; géologie marine; géologie des dépôts meubles/géomorphologie; sédimentologie; géochimie; géophysique
ProgrammeGéoscience de la gestion des océans, Géoscience en mer
Diffusé2017 09 26
Résumé(disponible en anglais seulement)
Sedimentary facies and benthic metabolism of subtidal sediments were studied in a relatively small, but historically active bay in Southern Nova Scotia, Canada.
Our study approach was based on the combination of benthic habitat mapping, field/lab experiments, and numerical models of sediment geochemistry. This approach provided an effective mean for ecosystem-scale assessments of key benthic processes (carbon recycling, denitrification, etc.). The distribution of bottom types and sediment properties was assessed using direct (grabs and core sampling) and remote (video and acoustic) sampling methods. The geo-referencing, classification, and interpolation of sediment properties (acoustic data, bathymetry, organic matter content, sediment porosity, etc.) allow to produce maps showing their spatial distribution, which instead served as input of numerical models oriented to predict carbon and nitrogen recycling rates at bay-scale. This approach become relevant given the commonly limited spatial and temporal resolution of biogeochemical measurements.
Results are discussed in regard to the implications for coastal management (maintenance of ecosystem functioning), and understanding of coastal biogeochemical cycles. Data quality and accuracy of spatially interpolated data was also evaluated, including their impacts on model predictions.
GEOSCAN ID305422