Publications des scientifiques de l'IRD

Derville S., Cleguer C., Garrigue Claire. (2022). Ecoregional and temporal dynamics of dugong habitat use in a complex coral reef lagoon ecosystem. Scientific Reports - Nature, 12 (1), p. 552 [15 p.]. ISSN 2045-2322.

Titre du document
Ecoregional and temporal dynamics of dugong habitat use in a complex coral reef lagoon ecosystem
Année de publication
2022
Type de document
Article référencé dans le Web of Science WOS:000783767400022
Auteurs
Derville S., Cleguer C., Garrigue Claire
Source
Scientific Reports - Nature, 2022, 12 (1), p. 552 [15 p.] ISSN 2045-2322
Mobile marine species display complex and nonstationary habitat use patterns that require understanding to design effective management measures. In this study, the spatio-temporal habitat use dynamics of the vulnerable dugong (Dugong dugon) were modelled from 16 satellite-tagged individuals in the coral reef lagoonal ecosystems of New Caledonia, South Pacific. Dugong residence time was calculated along the interpolated tracks (9371 hourly positions) to estimate intensity of use in three contrasting ecoregions, previously identified through hierarchical clustering of lagoon topographic characteristics. Across ecoregions, differences were identified in dugong spatial intensity of use of shallow waters, deeper lagoon waters and the fore-reef shelf outside the barrier reef. Maps of dugong intensity of use were predicted from these ecological relationships and validated with spatial density estimates derived from aerial surveys conducted for population assessment. While high correlation was found between the two datasets, our study extended the spatial patterns of dugong distribution obtained from aerial surveys across the diel cycle, especially in shallow waters preferentially used by dugongs at night/dusk during high tide. This study has important implications for dugong conservation and illustrates the potential benefits of satellite tracking and dynamic habitat use modelling to inform spatial management of elusive and mobile marine mammals.
Plan de classement
Limnologie biologique / Océanographie biologique [034] ; Ecologie, systèmes aquatiques [036]
Description Géographique
NOUVELLE CALEDONIE ; PACIFIQUE ; PACIFIQUE SUD
Localisation
Fonds IRD [F B010084697]
Identifiant IRD
fdi:010084697
Contact