No attenuation of fish and mammal biodiversity declines in the Guiana Shield

• DOI: 10.1016/j.scitotenv.2025.179021
• Publication Date: 2025-03-12T20:02:52Z
• Authors: Opale Coutant; Manuel Lopes-Lima; Jérôme Murienne; Loic Pellissier; Grégory Quartarollo; Alice Valentini; Vincent Prié; Sébastien Brosse
• Keywords: Mammal

Real-time biodiversity monitoring should provide more resolved data to quantify shifts in ecological communities progressively altered by anthropogenic disturbances. Identifying trends requires a rapid and efficient inventory method that enables the collection delivery of high-resolution within short intervals. Using aquatic environmental DNA (eDNA), we investigated spatiotemporal changes fish mammal along Maroni River French Guiana. We compared spatial between two years, separated four-year interval, during which an increase disturbances was observed. To evaluate changes, examined impact these on both taxonomic functional diversity. Our findings revealed that, while did not result major decline, it continued drive alterations community richness. Communities underwent their structure, with experiencing decline extreme traits, lost redundancy generalist functions experienced reduction strategies. In context small-scale disturbances, highlight necessity long-term, short-interval capture reorganisation under stress.