FN Archimer Export Format
PT J
TI Quantifying the shelter capacity of coral reefs using photogrammetric 3D modeling: From colonies to reefscapes
BT 
AF Urbina-Barreto, Isabel
   Chiroleu, Frédéric
   Pinel, Romain
   Fréchon, Louis
   Mahamadaly, Vincent
   Elise, Simon
   Kulbicki, Michel
   Quod, Jean-Pascal
   Dutrieux, Eric
   Garnier, Rémi
   Henrich Bruggemann, J.
   Penin, Lucie
   Adjeroud, Mehdi
AS 1:1,2;2:3;3:4;4:1,2;5:1,3;6:2;7:5;8:6;9:1;10:1;11:2;12:2;13:5,7;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;
C1 Creocean OI, 16 rue Albert Lougnon, 97490 Sainte Clotilde, La Réunion, France
   UMR 9220 ENTROPIE, Université de la Réunion, IRD, Université de la Nouvelle-Calédonie, IFREMER, CNRS, La Réunion, France
   CIRAD, UMR PVBMT, F-97410 Saint-Pierre, La Réunion, France
   Geolab S.A.S. 97438 Sainte Marie, La Réunion, France
   UMR 9220 ENTROPIE, Université de la Réunion, IRD, Université de la Nouvelle-Calédonie, IFREMER, CNRS, Perpignan, France
   ARVAM - Pareto, c/o Technor, 14 rue Henri Cornu, 97490 Sainte Clotilde CEDEX, France
   PSL Université Paris, USR 3278 CRIOBE - EPHE-UPVD-CNRS, Perpignan, France
C2 CREOCEAN, FRANCE
   UNIV LA REUNION, FRANCE
   CIRAD, FRANCE
   GEOLAB, FRANCE
   IRD, FRANCE
   ARVAM - PARETO, FRANCE
   UNIV PERPIGNAN, FRANCE
UM ENTROPIE
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-univ-france
IF 6.263
TC 32
UR https://archimer.ifremer.fr/doc/00659/77065/78372.pdf
   https://archimer.ifremer.fr/doc/00659/77065/78373.docx
LA English
DT Article
DE ;Coral reefs;Reef-building corals;Photogrammetry;3D models;Predictive models;Shelter capacity;Structural complexity;Coral growth forms
AB Structural complexity plays a key role in the functioning of coral reef ecosystems. Reef-building corals are major contributors to this complexity, providing shelter and food for numerous invertebrates and fish species. Both structural complexity and shelter capacity of reefscapes are determined by several components such as spurs and grooves, slope, caves and holes, vegetation and coral colonies. Quantifying the shelter capacity from coral colonies to reefscapes is a fundamental step to estimating ecosystem potential to support biodiversity. Here, we applied underwater photogrammetry to quantify shelter volumes provided by individual coral colonies. Overall, 120 3D models of coral colonies from branching, massive, columnar and tabular growth forms were studied. Three reefscapes were also 3D modeled. The study encompasses three Indo-Pacific Islands: Reunion, Europa and New Caledonia. At the colony level, measurements of diameter, planar area, surface and shelter volume were computed. At the reefscape, the diameter and planar area of each colony were extracted from orthomosaics and then used to estimate shelter capacity. Linear models had high accuracy for predicting shelter volume (a 3D metric) from 2D metrics: the diameter= 83.1%, R2= 0.95; the planar area= 87.5%, R2= 0.95 and the colony surface= 87.3%, R2= 0.96. The surface complexity and the shelter volume of the colonies allowed inferring the size of shelters provided by coral growth forms. Quantitative descriptors (i.e. relative percentage of shelter by growth form, the abundance of coral colonies, “Shannon-Shelter Index”) revealed reefscape-scale shelter differences. Our major finding is that planar area and diameter of coral colonies are satisfactory proxies for estimating shelter volume. These new proxies allow 2D metrics to quantify 3D shelter provision, which can support scientists and managers in conservation actions since such metrics are widely used in monitoring programs. Future investigations on the relationships between shelter provision and reef biodiversity will improve the understanding of these complex ecosystems. 
PY 2021
PD FEB
SO Ecological Indicators
SN 1470-160X
PU Elsevier BV
VL 121
UT 000604861300015
DI 10.1016/j.ecolind.2020.107151
ID 77065
ER

EF