I have several research themes with an overall research focus in community ecology. I examine how species co-exist and co-occur, and the influence of invasive species on co-existence patterns and communities. A key topic is how subordinate species manage to co-occur with dominant taxa. I integrate a range of techniques including advanced statistical procedures, isotopes and molecular genetic analyses. The primary group of organisms I work with are ants, but I supervise students in an array of different study systems including communities of deep sea fish.