Wetlands are rare ecosystems in arid tropical regions, playing multiple ecological roles and providing multiple ecosystem services. Unfortunately, these ecosystems are increasingly subject to strong anthropogenic pressures resulting from high population growth and the effects of climate variability. A good knowledge of the biodiversity of these ecosystems is essential for their sustainable management, as it is both the source and the product of their proper functioning. Macroinvertebrates are one of the most important links in the animal biodiversity of wetlands. However, knowledge of macroinvertebrates in the Bangr-Wéoogo urban park remains limited. This study aims to analyze the diversity of macroinvertebrates in the Bangr-Weoogo urban park, key players in the biological balance and food web of wetlands. To this end, macroinvertebrates were sampled monthly between March and June 2023, using the multihabitat sampling method and a standard AQEM/STAR net sampler with 25 cm × 25 cm opening and 500 µm mesh. Samples were stored in flasks with ethanol (90%). In the laboratory, specimens were sorted with entomological forceps and identified under a magnifying glass, using taxonomic manuals. A total of 21 macroinvertebrate families have been identified, comprising insects, molluscs and crustaceans. Insects are the most abundant and diverse. Taxa known to be sensitive to pollution, such as Ephemeroptera, Plecoptera and Trichoptera, are poorly represented, while molluscs are proportionally dominant. This could indicate the onset of eutrophication. These results show that the park's ecological integrity is under threat. Managers must take urgent action to remedy this degradation of the Bangr-Wéogo Urban Park.
