| Titre | High-resolution, habitat-suitability maps for the conservation and management of vulnerable marine ecosystems on the Louisville Seamount Chain, south Pacific Ocean |
| Télécharger | Téléchargement (publication entière) |
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| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Rowden, A A; Anderson, O F; Georgian, S E; Bowden, D A; Clark, M R; Pallentin, A; Miller, A |
| 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. 102, https://doi.org/10.4095/305921  Accès ouvert |
| Liens | GeoHab 2017
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| 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/10.4095/305921 |
| Media | en ligne; numérique |
| Référence reliée | Cette publication est contenue dans Program and
abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada |
| Formats | pdf |
| Région | Océan Pacifique |
| Lat/Long OENS | -178.0000 -145.0000 -25.0000 -50.0000 |
| Sujets | techniques de cartographie; océanographie; milieux marins; études côtières; conservation; organismes marins; écologie marine; gestion des ressources; peuplements biologiques; etudes de l'environnement;
écosystèmes; établissement de modèles; bathymétrie; topographie du fond océanique; levés géophysiques; levés acoustiques marins; levés au sonar; sonar latéral; photographie; caractéristiques sous-marines; monts sous-marins; dorsales sous-marines;
sédiments marins; récifs; Coraux; Biologie; Pêcheries; géologie marine; géologie des dépôts meubles/géomorphologie; géologie de l'environnement; géophysique; géologie de l'ingénieur |
| Programme | Géoscience en mer |
| Diffusé | 2017 09 26 |
| Résumé | (disponible en anglais seulement)
Vulnerable marine ecosystems (VMEs) are ecosystems at risk from the effects of fishing activity or other kinds of disturbance, as determined by the
vulnerability of their components (e.g., habitats, communities or species). Habitat suitability modelling is being used increasingly to predict distribution patterns of VME indicator taxa in the deep sea (where data are particularly sparse), and the
models are considered useful for marine ecosystem management.
The Louisville Seamount Chain is located within the South Pacific Regional Fishery Management Organisation (SPRFMO) Convention Area, and some seamounts are the subject of bottom
trawling for orange roughy by the New Zealand fishery. The aim of the present study was to produce high-resolution, habitat suitability maps for VME indicator taxa and VME habitat on these seamounts, in order to aid the design of within-seamount
spatial closures to protect VMEs.
We used a multi-model habitat suitability mapping approach, based on bathymetric and backscatter data collected by multibeam echo sounder survey, and data for the stony coral and habitat-forming VME indicator
species Solenosmilia variablis collected by towed underwater camera. Maps resulting from our models showed that suitable habitat for this species is distributed around the summit-slope break of seamounts, and along ridges that extend down the
seamount flanks. Only the flat, soft sediment summits are predicted to be unsuitable habitat for this stony coral species. We translated a definition for stony coral-reef habitat into a Solenosmilia variablis abundance-based threshold in order to use
our models to map this VME habitat. These maps showed that coral-reef occurred in small and isolated patches, with most of the seamounts predicted to be unsuitable habitat for this VME.
We discuss the implications of these results for spatial
management closures on the Louisville Seamount Chain seamounts and the wider SPRFMO area, and future modelling improvements that could aid efforts to use habitat suitability maps for managing the impact of fishing on vulnerable marine
ecosystems. |
| Sommaire | (Résumé en langage clair et simple, non publié)
La seizième conférence annuelle GeoHab s'est déroulée cette année (2017) au campus Waterfront du Nova Scotia Community College à Dartmouth, en
Nouvelle-Écosse, au Canada. |
| GEOSCAN ID | 305921 |
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