Abstract
Most platforms for collecting images to characterise marine benthic habitats involve a downward or forward-facing field of view that is relatively constrained (~70°), covering a relatively small area of benthos (downward ~1 m2, forward ~25 m2).
Here we propose the use of a four-camera platform having a wide combined field of view (~280°), covering a much greater area (up to 100 m2). We also present a stereo-camera configuration that has the added benefit of being able to accurately measure sample area and dimensions of benthic biota. The design proposed is robust and self-righting, facilitating rapid deployment and retrieval from a range of vessels, depths and environments.
We present an exemplar workflow to generate a habitat map (~100 km2) within a no-take National Park Zone within the South-west Corner Marine Park, Australia and demonstrate the benefit of increasing the field of view to estimate habitat heterogeneity.
The relatively broad sample unit of this wide-field drop camera is well suited to estimating coverage (e.g. of a seagrass bed) and habitat mapping. It is time-efficient in the field, enabling spatially balanced sampling designs to acquire ground-truthing data for medium- to large-scale habitat mapping projects. This platform is a practical tool to monitor change in marine environments and assess the environmental impact (e.g. sea bed alteration) of activities such as offshore energy or fishing gears.
Original language | English |
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Pages (from-to) | 1116-1125 |
Number of pages | 10 |
Journal | Methods in Ecology and Evolution |
Volume | 16 |
Issue number | 6 |
Early online date | 25 Feb 2025 |
DOIs | |
Publication status | Published - Jun 2025 |
Keywords
- benthic habitat
- drop camera
- environmental assessment
- monitoring
- population ecology
- sampling
- stereo-video
- surveys