Summary
Beddomeia ronaldi is a tiny (1-2 mm) freshwater snail occurring in tributaries of the St Patricks River, at Nunamara in northeast Tasmania. The species has a very narrow range, known only from tributaries of three streams flowing into St Patricks River. The principal threats to B. ronaldi are domestic activities (e.g. water extraction and refuse dumping), and agricultural activities which can result in habitat modification or degradation. B. ronaldi may also be impacted by competition with and displacement by the exotic snail Potamopyrgus antipodarum (New Zealand hydrobiid). The principal management objectives for B. ronaldi include preventing the loss or degradation of habitat at known localities, increasing public awareness of the species, and improving the species' reservation status.
Key Points
- 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.
ActivityGeneral
Habitat
- '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. ronaldi includes three tributaries of the St Patricks River, in northeast Tasmania (see distribution map, above). The potential range for B. ronaldi may extend beyond this range with additional surveys.
- Habitat for B. ronaldi includes the following elements: leaf litter, woody debris and rocks in stream channels, occurring on the underside of submerged habitat.
What to avoid
- Damage to the habitat through upstream domestic (e.g. water extraction, refuse dumping), agricultural, hydrological and forestry activities
- Damage to stream habitat through altered flow regimes (e.g. due to land clearing, establishment of impoundments etc)
Surveying
ActivitySurveying
Key |
Survey reliability more info |
M |
Peak survey period |
M |
Potential survey period |
M |
Non-survey period |
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.
Species |
Spring |
Summer |
Autumn |
Winter |
Beddomeia ronaldi |
S |
S |
O |
O |
N |
N |
D |
D |
J |
J |
F |
F |
M |
M |
A |
A |
M |
M |
J |
J |
J |
J |
A |
A |
- B. ronaldi is a very small, hard to find species which can be difficult to tell apart from other species of Beddomeia and some other hydrobiid snails. Identification to species level normally requires a specialist.
- For further information on surveying or identifying this species, contact the Threatened Species Section.
Helping the species
ActivityConservation
- 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
ActivityCutting
- Activities which result in habitat degradation are the principal threat to B. ronaldi, including clearing of streamside vegetation.
- To avoid damage to stream habitat – do not remove streamside vegetation around known localities.
- To avoid downstream impacts – do not clear streamside vegetation upstream of known localities.
Burning
ActivityBurning
- Activities which result in habitat degradation are the principal threat to B. ronaldi, including burning of streamside vegetation.
- To avoid damage to stream habitat – do not burn streamside vegetation around known localities.
- To avoid downstream impacts – do not burn streamside vegetation upstream of known localities.
Agriculture
ActivityAgriculture
- Activities which result in habitat degradation are the principal threat to B. ronaldi, including permanent clearing of native streamside vegetation.
- To avoid downstream impacts do not clear and convert (e.g. to pasture or plantation) streamside vegetation upstream of known localities.
Stock grazing
- To avoid damaging habitat – protect streamside habitat from stock by fencing and provide alternative access to water.
Construction
ActivityConstruction
- Activities which result in habitat degradation are the principal threat to B. ronaldi, 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 known localities.
Changing water flow / quality
ActivityAffectingWater
- Activities which result in habitat degradation are the principal threat to B. ronaldi, including alterations to flow conditions within stream habitat and pollution of the waterway.
- To avoid damage to stream habitat – avoid alterations to stream flow conditions, for example through construction of water impoundments upstream of known localities.
Use of chemicals
ActivityChemicals
- Activities which result in habitat degradation are the principal threat to B. ronaldi, 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 known localities 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 known localities where this could lead to runoff of fertiliser into the waterway.
Check also for listing statement or notesheet pdf above (below the species image).
FurtherInformation