Keystone species

The gopher tortoise is a keystone species that creates networks of underground burrows that are home to an additional 350 species, where 60 are vertebrates. Vertebrates have been shown to differ between habitat types and seasonally, but limited information is known about vertebrate associates in our region. This study was one of the first to investigate this in our region of south Florida. This study was designed to investigate factors that may affect the presence of vertebrates at gopher tortoise burrows. Camera data was collected to determine vertebrate presence and if specific vertebrate groups elicit a territorial response from the tortoise, while habitat vegetation surveys and weather data were collected to evaluate seasonality. Statistical analysis showed variation in vertebrate presence both seasonally and by habitat type. Few territorial interactions were observed overall. This study acts as a starting point to increase our understanding of local tortoise populations.

Gopher tortoise (Gopherus Polyphemus) burrows provide a unique microhabitat used by hundreds of vertebrate and invertebrate species. Prior to this study, limited information was available regarding burrow commensal species in southeast Florida, especially for invertebrate taxa. This study is an in-depth investigation of vertebrate and invertebrate gopher tortoise burrow commensals and is the first to document obligate invertebrate commensals (OIC) in this region. The objective was to test a variety of noninvasive methods effective for surveying commensals, compile an account of species dependent on gopher tortoise burrows in southeast Florida, accumulate information on threatened, endangered, and invasive species, add to the distributional information on OIC’s, and present information to land managers. Three pine flatwoods and three scrub habitats, with varying degrees of management were surveyed. Eighty-nine species were identified. This study was a substantial step toward documenting gopher tortoise burrow commensals in this region.