Mare-Longue Research Station (MRS) is an infrastructure for terrestrial ecology which focuses mainly on native ecosystems of the Mascarenes archipelago. It aims at facilitating training and research on tropical biodiversity and ecosystems functioning on the island. The station is commonly used in collaborative programs with the local National Park, Forest Services and institutions dedicated to preserving local species and ecosystems. It is part of the research unit PVBMT (plant communities and biological invaders in tropical environment), and is also associated to the atmospheric research station and volcanological observatory at Reunion University (OSUR).

The station provides a small laboratory with scientific and field equipment and accommodation for visiting scientists.  Field facilities include a network of permanent plots enabling monitoring of unique habitats in Reunion World Heritage Site (tropical and cloud rain forests, lava flows on the Piton de La Fournaise , coastal vegetation).