| Titre | Remote sensing assessment of seaweed resources in western Ireland |
| Télécharger | Téléchargement (publication entière) |
| Auteur | Rossiter, T; Casal, G; Furey, T; McCarthy, T; Stengel, D B |
| Source | Program 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. 101, https://doi.org/10.4095/305920 (Accès ouvert) |
| Liens | GeoHab 2017
|
| Année | 2017 |
| Éditeur | Ressources naturelles Canada |
| Réunion | 2017 GeoHab: Marine Geological and Biological Habitat Mapping; Dartmouth, NS; CA; mai 1-4, 2017 |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/305920 |
| Media | en ligne; numérique |
| Référence reliée | Cette 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 |
| Formats | pdf |
| Lat/Long OENS | -10.0000 -9.0000 53.2500 52.5000 |
| Sujets | techniques de cartographie; océanographie; milieux marins; études côtières; conservation; organismes marins; écologie marine; gestion des ressources; peuplements biologiques; etudes de l'environnement;
écosystèmes; télédétection; levés géophysiques; levés acoustiques marins; sonar latéral; levés au sonar; levés radiométriques; biologie; géophysique |
| Programme | Géoscience en mer, Géoscience de la gestion des océans |
| Diffusé | 2017 09 26 |
| Résumé | (disponible en anglais seulement)
The aim of this work is to develop an innovative and multi-disciplinary approach to assess the distribution and biomass of both intertidal fucoids (Ascoplyllum
nodosum) and subtidal kelps (Laminariales) which are both of commercial and ecological importance in Ireland. We look to address the current deficit of information about these Irish seaweeds, which will underpin sustainable resource development.
Aerial hyperspectral imagery is used to assess A. nodosum populations and will enhance species discrimination in a spatially and spectrally heterogeneous environment like the intertidal zone. Kelp habitat assessment will be done using a multibeam
system (MBES) on a small vessel. Field surveys will be used to ground-truth both A. nodosum and kelp distribution, evaluate morphology, and estimate biomass.
An aerial survey (July 2016) was conducted in western Ireland (Galway Bay) to survey A.
nodosum using a Cessna 172 mounted with a Multispectral AIRINOV AgroSensor and a OCITM-U-1000 Ultra Compact Hyperspectral Imager. The flight plan was designed to cover as much of the intertidal zone as possible. Field-based surveys have been
conducted at multiple sites to match algal species presence, composition and biomass within the A. nodosum beds along with a field-radiometry survey, using a TriOS RAMSES radiometer, to construct a spectral library of species and substrate to
classify the remote sensing data. To improve the accuracy of the A. nodosum assessment, ground-truthing data are being collected on-foot, using a hand-held GPS device (Garmin Montana 600), to support the classification process by underpinning the
selection of training areas.
We present a detailed methodology for assessing the spectral response of A. nodosum in relation to biological and physiological parameters in its habitat and the challenges associated with the discrimination between
species of the same genus. Small drones offer very high resolution colour imagery and will support the A. nodosum assessment by collecting ground-truthing data far more efficiently than on-foot methods. |
| GEOSCAN ID | 305920 |
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