Beddomeia capensis is a freshwater snail known only from several small streams on Table Cape, northwest Tasmania. The species previously occurred at five sites, but recent surveys have failed to find species at three of these sites. The total length of occupied stream is < 80 m, with a maximum 0.3 km separation between the known sites. Subpopulations occurring in the two streams are separated by topography and inhospitable environments. The principal threats to B. capensis are associated with agricultural practices, resulting in habitat modification or degradation. B. capensis may also be vulnerable to competition with the exotic snail Potamopyrgus antipodarum (New Zealand hydrobiid). The principal management objectives for B. capensis include preventing the loss or degradation of habitat supporting known populations, identification of new subpopulations, increasing public awareness of the species, and improving its reservation status.
- Important: Is this species in your area? Do you need a permit? Ensure you’ve covered all the issues by checking the Planning Ahead page.
- Important: Different threatened species may have different requirements. For any activity you are considering, read the Activity Advice pages for background information and important advice about managing around the needs of multiple threatened species.
- 'Habitat’ refers to both known habitat for the species (i.e. in or near habitat where the species has been recorded) and potential habitat (i.e. areas of habitat with appropriate characteristics for the species and within the species' potential range which have not yet been adequately surveyed).
- If in doubt about whether a site represents potential habitat for this species, contact the Threatened Species Section for further advice.
- The known range of B. capensis includes two small streams on Table Cape and one tributary of Big Creek, in central north Tasmania. The potential range for B. capensis extends inland approximately 18 km and includes much of the Big Creek catchment.
- Habitat for B. capensis includes the following elements: leaf litter and woody debris in the stream channels and rocks, where is may be found located on the underside of this submerged material.
What to avoid
- Damage to downstream habitat at known sites through upstream agricultural practices
- Damage to stream habitat through altered flow regimes (e.g. alterations to water impoundments upstream of the known localities)
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To ensure you follow the law - check whether your survey requires a permit. Always report any new records to the Natural Values Atlas, or send the information direct to the Threatened Species Section. Refer to the Activity Advice: Surveying page for background information.
- B. capensis is a very small, cryptic species which can be difficult to tell apart from other species of Beddomeia and some other hydrobiid snails. Identification to species normally requires a specialist.
- For further information on assistance in surveying or identifying this species, contact the Threatened Species Section.
Helping the species
- If you live or work in the area where the species occurs (see distribution map, above), look out for and record any observations of the species. All records of this species can provide important information on distribution and abundance.
- Important! Always report any observations of the species to the NRE Natural Values Atlas, or else provide the data direct to the Threatened Species Section. Records stored on the NVA are a permanent record and are accessible to other people interested in this species.
- Consider the needs of the whole habitat. Preserving a threatened species' habitat is the best way to manage both the species and the environment in which it lives.
- For long-term protection of populations on private land – consider protection of habitat through a vegetation management agreement or conservation covenant. See the NRE Private Land Conservation Program for more details.
Cutting or clearing trees or vegetation
- Activities which result in habitat degradation are the principal threats to B. capensis, including clearing of streamside vegetation.
- To avoid damage to stream habitat – do not remove streamside vegetation around populations.
- To avoid downstream impacts – do not clear streamside vegetation upstream of populations.
- Activities which result in habitat degradation are the principal threats to B. capensis, including burning of streamside vegetation.
- To avoid damage to stream habitat – do not burn streamside vegetation around populations.
- To avoid downstream impacts – do not burn streamside vegetation upstream of populations.
- Activities which result in habitat degradation are the principal threats to B. capensis, including clearing of streamside vegetation and conversion to pasture and plantation.
- To avoid downstream impacts do not clear and convert (e.g. to pasture or plantation) streamside vegetation upstream of populations.
- To avoid damaging habitat – protect streamside habitat from stock by fencing and provide alternative access to water.
- Activities which result in habitat degradation are a principal threat to B. capensis, including alterations to flow conditions within stream habitat
- To avoid damage to stream habitat – avoid alterations to stream flow conditions, for example through construction of water impoundments upstream of populations
- To avoid loss of habitat – ensure appropriate surveys are undertaken during the planning stage for dam construction in areas of habitat.
Changing water flow / quality
- Activities which result in habitat degradation are the principal threats to B. capensis, including alterations to flow conditions within stream habitat.
- To avoid damage to stream habitat – avoid alterations to stream flow conditions, for example through construction of water impoundments upstream of the known populations.
Use of chemicals
- Activities which result in habitat degradation are a principal threat to B. capensis, including pollution of the waterway. Sources of chemical pollution include pesticides and herbicides, and fertiliser runoff into waterways
- To avoid damage to stream habitat – do not use herbicides and pesticides in the vicinity of populations where this could lead to input of chemicals into the waterway
- To avoid damage to stream habitat – avoid application of fertiliser in the vicinity of populations where this could lead to runoff of fertiliser into the waterway.
Check also for listing statement or notesheet pdf above (below the species image).