| Title | Remote sensing assessment of seaweed resources in western Ireland |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Rossiter, T; Casal, G; Furey, T; McCarthy, T; Stengel, D B |
| Source | Program and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada; by Todd, B J ; Brown, C J; Lacharité, M; Gazzola, V; McCormack, E; Geological Survey of Canada, Open File 8295, 2017 p. 101, https://doi.org/10.4095/305920  Open Access |
| Links | GeoHab 2017
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| Year | 2017 |
| Publisher | Natural Resources Canada |
| Meeting | 2017 GeoHab: Marine Geological and Biological Habitat Mapping; Dartmouth, NS; CA; May 1-4, 2017 |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Program and abstracts: 2017
GeoHab Conference, Dartmouth, Nova Scotia, Canada |
| File format | pdf |
| Area | Galway Bay; Ireland |
| Lat/Long WENS | -10.0000 -9.0000 53.2500 52.5000 |
| Subjects | geophysics; mapping techniques; oceanography; marine environments; coastal studies; conservation; marine organisms; marine ecology; resource management; biological communities; environmental studies;
ecosystems; remote sensing; geophysical surveys; acoustic surveys, marine; side-scan sonar; sonar surveys; radiometric surveys; seaweed; fucoids; kelps; Biology |
| Program | Offshore Geoscience |
| Released | 2017 09 26 |
| Abstract | 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. |
| Summary | (Plain Language Summary, not published)
The sixteenth annual GeoHab Conference was held this year (2017) at the Waterfront Campus of the Nova Scotia Community College in Dartmouth, Nova Scotia,
Canada. |
| GEOSCAN ID | 305920 |
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