The diversity of shallow habitats in New Caledonia reefs and lagoons

This document forms an appendix to the paper "A regionally scalable habitat typology for assessing benthic habitats and fish communities: application to New Caledonia reefs and lagoons" published in 2020 in the journal Ecology and Evolution by Dominique Pelletier, Nazha Selmaoui-Folcher, Thomas Bockel and Thomas Schohn.

The paper describes a new methodology for i) determining habitat types consistent across scales within large management units, ii) characterizing heterogeneities within each habitat, and iii) predicting habitat from new survey data. It relies on clustering techniques and supervised classification rules and was applied to a set of 3145 underwater video observations of fish and benthic habitats collected in all reef and lagoon habitats around New Caledonia. A baseline habitat typology was established with five habitat types clearly characterized by abiotic and biotic attributes. In a complex mosaic of habitats, habitat type is an indispensable covariate for explaining spatial variations in fish communities. Habitat types were further described by 26 rules capturing the range of habitat features encountered.

Rules provided intuitive habitat descriptions and  predicted habitat type for new monitoring observations, both straightforwardly and with known confidence.

Images are convenient for interacting with managers and stakeholders. This documents contains sample images illustrating each of the rules obtained and depicts the diversity of shallow seascapes encountered in the Coral Sea Marine Park and in the coastal areas of New Caledonia.

This document forms an appendix to the paper "A regionally scalable habitat typology for assessing benthic habitats and fish communities: application to New Caledonia reefs and lagoons" published in 2020 in the journal Ecology and Evolution by Dominique Pelletier, Nazha Selmaoui-Folcher, Thomas Bockel and Thomas Schohn.

The paper describes a new methodology for i) determining habitat types consistent across scales within large management units, ii) characterizing heterogeneities within each habitat, and iii) predicting habitat from new survey data. It relies on clustering techniques and supervised classification rules and was applied to a set of 3145 underwater video observations of fish and benthic habitats collected in all reef and lagoon habitats around New Caledonia. A baseline habitat typology was established with five habitat types clearly characterized by abiotic and biotic attributes. In a complex mosaic of habitats, habitat type is an indispensable covariate for explaining spatial variations in fish communities. Habitat types were further described by 26 rules capturing the range of habitat features encountered.

Rules provided intuitive habitat descriptions and  predicted habitat type for new monitoring observations, both straightforwardly and with known confidence.

Images are convenient for interacting with managers and stakeholders. This documents contains sample images illustrating each of the rules obtained and depicts the diversity of shallow seascapes encountered in the Coral Sea Marine Park and in the coastal areas of New Caledonia.

Disciplines

Biological oceanography

Keywords

habitat typology, in situ monitoring, underwater video, Coral Sea Marine Park, scaling up, Marine Protected Areas, habitat prediction, supervised classification rules, data mining

Location

-17.657899N, -23.295095S, 168.620907E, 157.590633W

Devices

underwater video

 

Data

FileSizeFormatProcessingAccess
Appendix 7 to Pelletier et al. 2020 Ecology and Evolution
8 MoPDFProcessed data
How to cite
Pelletier Dominique (2020). The diversity of shallow habitats in New Caledonia reefs and lagoons. SEANOE. https://doi.org/10.17882/73937

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