Local Circalittoral Rocky Seascape Structuring Fish Community: Insights from a Photogrammetric Approach

Local Circalittoral Rocky Seascape Structuring Fish Community: Insights from a Photogrammetric Approach

Quentin Ternon, Antoine Collin, Eric Feunteun, Frédéric Ysnel, Valentin Danet, Manon Guillaume & Pierre Thiriet (2023). Local Circalittoral Rocky Seascape Structuring Fish Community: Insights from a Photogrammetric Approach. In: Niculescu, S. (eds) European Spatial Data for Coastal and Marine Remote Sensing. Springer, pp. 229-234. https://doi.org/10.1007/978-3-031-16213-8_16

Fish face multiple environmental pressures acting as multiscale filters structuring the community. Study of the effect of local (~100 m²) habitat components such as habitat architecture, substrate composition, and benthic community on fish community is still limited because of the technical difficulties to sample reliable descriptors of all these habitat components. Nevertheless, the effect of the 3D architecture, especially the complexity, has been highlighted to act as an important variable, locally structuring fish communities and leading to an increase in diversity (species richness and Shannon index) and quantity (total density and biomass) of fish. Photogrammetry is extending to submarine environment and allows to produce very fine information of the architecture and substrate composition, as well as of the benthic community. The influence of the different habitat components (i.e., architecture, substrate composition, and benthic community) on the structure of fish community is here investigated, as well as the interest of photogrammetry in comparison to visual observation (Fig. 1).

BOREA contact: Quentin Ternon, quentin.ternon@mnhn.fr

Picture title of Fig. 1 :

Overview of environmental variables obtained with photogrammetry (on the left) and visual observation (on the right) to study the habitat (a–c) and fish community (d) relationship. Three habitat components are distinguished: architecture (a), substrate composition (b), and benthic community (benthos; c). © O. Bianchimani, V. Danet, Q. Ternon and E. Feunteun

Quentin TERNON's picture
Quentin TERNON
MNHN CRESCO Dinard
PhD student
BIOPAC
The French National Museum of Natural History (MNHN)
Published on 20 Jan 2023
Updated on 20 Feb 2023