Predators, prey and habitat structure: can key conservation areas and early signs of population collapse be detected in neotropical forests?

De Thoisy Benoit, Fayad Ibrahim, Clément Luc, Barrioz Sébastien, Poirier Eddy, Gond Valéry. 2016. Predators, prey and habitat structure: can key conservation areas and early signs of population collapse be detected in neotropical forests?. PloS One, 11 (11):e0165362, 19 p.

https://doi.org/10.1371/journal.pone.0165362

Article de revue ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total

Prévisualisation

Version publiée - Anglais
Sous licence CC0 1.0 Sans restriction de droits pour le monde entier.
de Thoisy_Plos-One_2016.pdf
Télécharger (1MB) | Prévisualisation

Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie; Staps

Résumé : Tropical forests with a low human population and absence of large-scale deforestation provide unique opportunities to study successful conservation strategies, which should be based on adequate monitoring tools. This study explored the conservation status of a large predator, the jaguar, considered an indicator of the maintenance of how well ecological processes are maintained. We implemented an original integrative approach, exploring successive ecosystem status proxies, from habitats and responses to threats of predators and their prey, to canopy structure and forest biomass. Niche modeling allowed identification of more suitable habitats, significantly related to canopy height and forest biomass. Capture/recapture methods showed that jaguar density was higher in habitats identified as more suitable by the niche model. Surveys of ungulates, large rodents and birds also showed higher density where jaguars were more abundant. Although jaguar density does not allow early detection of overall vertebrate community collapse, a decrease in the abundance of large terrestrial birds was noted as good first evidence of disturbance. The most promising tool comes from easily acquired LiDAR data and radar images: a decrease in canopy roughness was closely associated with the disturbance of forests and associated decreasing vertebrate biomass. This mixed approach, focusing on an apex predator, ecological modeling and remote-sensing information, not only helps detect early population declines in large mammals, but is also useful to discuss the relevance of large predators as indicators and the efficiency of conservation measures. It can also be easily extrapolated and adapted in a timely manner, since important open-source data are increasingly available and relevant for large-scale and real-time monitoring of biodiversity.

Mots-clés Agrovoc : forêt tropicale, conservation des ressources, écosystème forestier, protection de l'environnement, faune, faune et flore sauvages, jaguar, écologie animale, espèce en danger, dynamique des populations, biodiversité, télédétection, imagerie par satellite