Are invasive hymenopteran species replacing native mud dauber wasp-associated taxa on the Seychelles Archipelago?

Nest aggregations of mud dauber wasps increase substrate heterogeneity and provide suitable sites for colonization by other invertebrate species. The wasp Sceliphron fuscum Klug, 1801 (Hymenoptera: Sphecidae) abundantly occurs throughout the Seychelles Archipelago, Republic Seychelles. Here, we estimated taxonomic richness hymenopteran assemblage associated with S. fuscum’s nest aggregations, using material collected from Inner in 2016. Furthermore, examine available historical survey data order to assess possible changes this association over decades. We discovered that 1936 1938, seven species were on Mahé Praslin islands, representing six native taxa one invasive From 2016, found three nests. Our findings could indicate a replacement wasps’ recently introduced alien Archipelago.