Calado, Hugo RenatoCosta Miranda Soares, António OnofreHeleno, RubenBorges, PauloCosta, Ana2026-01-212026-01-212025-02-24Calado, H. R. M. G., Soares, A. O., Heleno, R., & Borges, P. A. V. (2025). Arthropod communities of insular (São Miguel Island, Azores) and mainland (Portugal) coastal grasslands. Biodiversity Data Journal, 13, e1449152. DOI:10.3897/BDJ.13.e1449151314-2836http://hdl.handle.net/10400.3/8785The data presented here is part of a doctoral project aimed at characterising and comparing arthropod diversity across biotic communities in coastal ecosystems. The present work provides an inventory of the arthropods recorded in two coastal grasslands ecosystems: the Portugal mainland and the Azores. Sampling was conducted on São Miguel Island (Azores Archipelago) as well as in the Sesimbra and Sines regions (Setúbal District, mainland Portugal). Thirty-one plots were set and visited four times, in spring and summer of 2022.engarthropodsAzoresmainlandcoastal grasslandssweeping netinvasive speciesdata paper10.3897/BDJ.13.e1449151314-2828