Document ID: chunk:federal_register_of_legislation:F2007B00384:body:0:p7
Version: federal_register_of_legislation:F2007B00384
Segment Type: other
Provision Reference: 
Character Range: 16447–19362

Dale (Dale No.6) on the western side of the island; about 4 kilometres west of Aldrich Hill and 13 kilometres west of Greta Beach Road/Gannet Hill.
      Note: this population was not relocated despite two attempts (Claussen pers. comm.).

These populations when combined total less than 300 individuals.

Population 5 was located in March 2003 by plant ecologists carrying out environment impact assessment for an expansion of phosphate mining.  This was north of the Resort on the eastern terrace.  The precise location will be provided when the draft environmental impact statement has been released, but will be kept confidential (Zimmermann; Reddell pers. comm.).

Figure 1 Localities for Asplenium listeri

Base map © Commonwealth of Australia

  Known localities
  Type locality (not extant)

Unconfirmed

Although other occurrences have been reported, these appear to coincide with confirmed sites:
    * A population of about 20 mature individuals with hundreds of sporelings, was located in about 1996 north of the Resort, above a spring and stream bed, and below a mining lease (Hart pers. comm.).  This site is apparently not the same as Population 5 (Bennett in litt.)
    * The Commonwealth database notes a site at Jones Spring (about 600 metres north of the Resort on the east coast) and said to have approximately 500 individuals (90% juveniles).  This was not relocated despite attempts in 2001 and 2002 (Claussen pers. comm.).  This site is almost certainly the site noted above which was reported in about 1996.
    * A population of unknown size was reported in the vicinity of the Greta Beach Road on the east coast in approximately late 1996, but this was not readily relocated (Hart pers. comm.).  This is highly likely to be Population 2 which was (re)located in March-April 2002.

B.1.3 Important populations

An important population is one that is necessary for the species' long-term survival and recovery.  This may include populations that are:
    * key sources for reproduction and dispersal
    * necessary for maintaining genetic diversity
    * near the limit of the range of the species.

All known occurrences of Asplenium listeri need to be regarded as important populations, based on:
    * endemic status
    * highly restricted occurrence; and
    * uncertainty surrounding the reasons for its rarity.

Any additional populations that are located within the term of this plan need to be similarly regarded as important populations.

B.1.4 Potential habitat

Despite the limited occurrences, 'potential habitat' appears to be:
     * limestone rock crevices at the uppermost part of inland cliffs above terraces (or cuttings of similar structure)
     * between about 110 and 255 metres elevation; and
     * often beneath or near Ficus microcarpa.

Populations can easily remain undetected in this habitat, since much of the terraces and associated cliffs (particularly