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Castra Rivulet Beddomeid Snail

SPECIES MANAGEMENT PROFILE

Beddomeia lodderaeCastra Rivulet Freshwater Snail

Group:Mollusca (shellfish), Gastropoda, Hypsogastropoda, Hydrobiidae
Status:Threatened Species Protection Act 1995: vulnerable
Environment Protection and Biodiversity Conservation Act 1999: Not listed
Endemic
Status:
Found only in Tasmania
Click to enlarge
Beddomeia lodderae is a tiny (2-3 mm) freshwater snail occurring in a tributary of Castra Rivulet, near Nietta, in central northern Tasmania. The species has an extremely narrow range, known only from one stream. The principal threats to B. lodderae are domestic and agricultural land usage which can result in habitat modification or degradation. B. lodderae may also be impacted by competition with and displacement by the exotic snail Potamopyrgus antipodarum (New Zealand hydrobiid). The principal management objectives for B. lodderae include preventing the loss or degradation of habitat supporting known populations, identification of new subpopulations, 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.
  

​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. lodderae includes a single small stream at Nietta, in central north Tasmania (see distribution map, above). The potential range for B. lodderae has been mapped; however, the species may be found to may extend beyond this range with subsequent surveys.
  • Habitat for B. lodderae 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 through upstream agricultural and forestry practices
  • Damage to stream habitat through altered flow regimes (e.g. due to land clearing, establishment of impoundments etc)

Surveying

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 lodderae 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. lodderae is a very small, cryptic species which can be difficult to tell apart from other species of Beddomeia and the related genus Phrantela. 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 DPIPWE 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 DPIPWE 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. lodderae, 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.

Burning

  • ​Activities which result in habitat degradation are the principal threats to B. lodderae, 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.

Agriculture

  • ​Activities which result in habitat degradation are the principal threats to B. lodderae, 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 populations.

Stock grazing

  • To avoid damaging habitat – protect streamside habitat from stock by fencing and provide alternative access to water.

Construction

  • ​Activities which result in habitat degradation are a principal threat to B. lodderae, 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.

Subdivision

Earthworks

Changing water flow / quality

  • ​Activities which result in habitat degradation are a principal threat to B. lodderae, 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 populations.

Use of chemicals

  • ​Activities which result in habitat degradation are a principal threat to B. lodderae, 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.

Recreation

Further information

​Check also for listing statement or notesheet pdf above (below the species image).

Cite as: Threatened Species Section (). (): Species Management Profile for Tasmania's Threatened Species Link. . Department of Primary Industries, Parks, Water and Environment, Tasmania. Accessed on .

Contact details: Threatened Species Section, Department of Primary Industries, Parks, Water and Environment, GPO Box 44, Hobart, Tasmania, Australia, 7001. Phone (1300 368 550).

Permit: A permit is required under the Tasmanian Threatened Species Protection Act 1995 to 'take' (which includes kill, injure, catch, damage, destroy and collect), keep, trade in or process any specimen or products of a listed species. Additional permits may also be required under other Acts or regulations to take, disturb or interfere with any form of wildlife or its products, (e.g. dens, nests, bones). This may also depend on the tenure of the land and other agreements relating to its management. ​​​​​