An experimental test of gating derelict mines to conserve bat roost habitat in southeastern Australia

• Autorzy: Slade C.P. , Law B. S.
• Języki publikacji: EN

Abstrakty

EN

Management of derelict mines to improve subterranean bat habitat and minimise safety risks to the unsuspecting public is occurring more frequently. Many caves and mines around the world have had gates placed at mine and cave entrances as a means of maintaining bat habitat and preventing human access, but there have been few replicated experiments to test their effectiveness. We experimentally tested a staged installation of a template gate at two mines while monitoring another two un-gated derelict mines in southeastern Australia. We recorded changes in numbers, behaviour and the relative species abundance of two bat species (Rhinolophus megaphyllus and Miniopterus schreibersii) before and after the gates were installed. The template gate (20 mm diameter plastic tubing) was installed in three stages, with the initial horizontal bar spacing at 450 mm, followed by a spacing of 300 mm and a final spacing of 125 mm. Bat numbers and behaviour were largely unaffected by bar spacings of 450 mm and 300 mm. The major findings were that immediately after the installation of bars at the final spacing (125 mm gap), numbers of bats declined significantly and a significant increase in the number of aborted exit and entry flights was observed. Detectors proved to be inadequate at quantifying changes in the relative abundance of species. Eleven days after the final installation there were no significant differences between the numbers of bats leaving gated and control mines, suggesting bats had learnt to negotiate the bars after a short period of time. However, flight behaviour was still affected after habituation, especially baulking at the structure when bats attempted to re-enter before dawn. The low replication of mines in the experiment warrants caution in extrapolating this result. Until further gating experiments are carried-out, we recommend site specific monitoring whenever mines are gated.

Słowa kluczowe

EN

experimental test; derelict mine; bat; Rhinolophus megaphyllus; Miniopterus schreibersii; roost; gate; animal habitat; Australia

• Wydawca: -
• Czasopismo: Acta Chiropterologica
• Rocznik: 2008
• Tom: 10
• Numer: 2
• Opis fizyczny: p.367-376,fig.,ref.

Twórcy

autor

Slade C.P.

• Ecosystem Management, University of New England, Armidale, 2351 NSW, Australia
• Forests NSW, Department of Primary Industries, Central Region Maher Street, Wauchope, 2446 NSW, Australia

autor

Law B. S.

• Science and Research, Department of Primary Industries, PO Box 100, Beecroft, 2119 NSW, Australia

Bibliografia

• 1. N. Berry, W. O'Connor, M. W. Holderied, and G. Jones . 2004. Detection and avoidance of harp traps by echolocating bats. Acta Chiropterologica 6:335–364. Google Scholar
• 2. J. E. Burghardt 2000. Bat-compatible closures of abandoned underground mines in National Park system units. Bat Gate Design: A technical interactive forum. Proceedings of bat conservation and mining: A technical interactive forum November 14–16, 2000. Bat conservation and mining. http://www.mcrcc.osme.gov/PDF/forums/Bat%20Gate/TOC.pdf. Accessed 27 October 2003. Google Scholar
• 3. S. Churchill 1991. Distribution, abundance and roost selection of the orange horseshoe-bat, Rhinonycteris aurantius, a tropical cave-dweller. Wildlife Research 18:343–53. Google Scholar
• 4. S. Churchill 1998. Australian bats. Reed New Holland. Sydney. 230. pp. Google Scholar
• 5. R. R. Currie 2000a. An evaluation of alternative methods for constructing bat gates at mine closures Bat gate design: a technical interactive forum. Proceedings of bat conservation and mining: a technical interactive forum November 14–16, 2000. http://www.mcrcc.osme.gov/PDF/forums/Bat%20Gate/TOC.pdf. Accessed 27 October 2003. Google Scholar
• 6. R. R. Currie 2000b. An overview of the response of bats to protection efforts Bat gate design: a technical interactive forum. Proceedings of bat conservation and mining: a technical interactive forum November 14–16, 2000. http://www.mcrcc.osme.gov/PDF/forums/Bat%20Gate/TOC.pdf. Accessed 27 October 2003. Google Scholar
• 7. S. L. Ducummon 2000. Ecological and economic importance of bats Bat gate design: a technical interactive forum. Proceedings of bat conservation and mining: a technical interactive forum, November 14–16, 2000. http://www.mcrcc.osme.gov/PDF/forums/Bat%20Gate/TOC.pdf. Accessed 27 October 2003. Google Scholar
• 8. P. D. Dwyer 1963. The breeding biology of Miniopterus schreibersii blepotis (Temminck) (Chiroptera) in north-eastern New South Wales. Australian Journal Zoology 11:219–240. Google Scholar
• 9. P. D. Dwyer 1965. Flight patterns of some eastern Australian bats. Victorian Naturalist 82:36–41. Google Scholar
• 10. P. D. Dwyer 1966. Observations on the eastern horse-shoe bat in north-eastern New South Wales. Helectite 4:73–82. Google Scholar
• 11. P. D. Dwyer and E. Hamilton-Smith . 1965. Breeding caves and maternity colonies of the bent-winged bat in south-eastern Australia. Helectite 4:3–21. Google Scholar
• 12. D. P. Flemming 2000. The U.S. Fish and Wildlife Service's perspective on bats and mining. Bat gate design: a technical interactive forum. Proceedings of bat conservation and mining: a technical interactive forum, November 14–16, 2000. http://www.mcrcc.osme.gov/PDF/forums/Bat%20Gate/TOC.pdf. Accessed 27 October 2003. Google Scholar
• 13. L. S. Hall, R. A. Young, and A. P. Spate . 1975. Roost selection of the eastern horseshoe bat Rhinolophus megaphyllus. Pp 47–56. in Proceedings of the 10th Biennial Conference of the Australian Speleological Federation. A. W. Graham , editor. ed. Australian Speleological Federation. Sydney. 110. pp. Google Scholar
• 14. L. Hall, G. Richards, N. Mckenzie, and N. Dunlop . 1997. The importance of abandoned mines as habitat for bats. Pp 326–333. in Conservation outside nature reserves. P. Hale and D. Lamb , editors. eds. Centre for Conservation Biology, The University of Queensland. Brisbane. 534. pp. Google Scholar
• 15. M. E. Ludlow and J. A. Gore . 2000. Effects of a cave gate on emergence patterns of colonial bats. Wildlife Society Bulletin 28:191–196. Google Scholar
• 16. L. Lumsden 1998. Mines inspected for the identification of bat habitat as part of the disused mines risk mitigation program in the Port Phillip Region, and discussion on design of a bat gate. A report to Land Victoria, Port Phillip Region. Arthur Rylah Institute, Flora and Fauna Branch. St. Heidelberg, Victoria. Google Scholar
• 17. K. W. Martin, D. M. Leslie Jr., M. E. Payton, W. L. Puckette, and S. L. Hensley . 2003. Internal cave gating for protection of colonies of the endangered gray bat (Myotis grisescens). Acta Chiropterologica 5:143–50. Google Scholar
• 18. K. W. Martin, D. M. Leslie Jr., M. E. Payton, W. L. Puckette, and S. L. Hensley . 2006. Impacts of passage manipulation on cave climate: Conservation Implications for cave-dwelling bats. Wildlife Society Bulletin 34:137–143. Google Scholar
• 19. NPWS and DMR (NSW National Parks and Wildlife Service and NSW Department of Mineral Resources) 2001. Strategy for the conservation of bats in derelict mines. NPWS. Hurstville, New South Wales. 18. pp. Google Scholar
• 20. K. P. Parsons, G. Jones, I. Davidson-Watts, and F. Green-away . 2003. Swarming of bats at underground sites in Britain — implications for conservation. Biological Conservation 111:63–70. Google Scholar
• 21. C. R. Pavey and C. J. Burwell . 2004. Foraging ecology of the horseshoe bat, Rhinolophus megaphyllus (Rhinolophidae), in eastern Australia. Wildlife Research 31:403–13. Google Scholar
• 22. C. R. Pavey and R. Young . 1995. The eastern horseshoe bat Rhinolophus megaphyllus. Pp 449–451. in Mammals of Australia. R. Strahan , editor. ed. Reed Books. Sydney. 756. pp. Google Scholar
• 23. R. D. Powers Jr. 2000. The Angle Iron Gate. Bat gate design: a technical interactive forum. Proceedings of bat conservation and mining: a technical interactive forum November 14–16, 2000. http://www.mcrcc.osme.gov/PDF/forums/Bat%20Gate/TOC.pdf. Accessed 27 October 2003. Google Scholar
• 24. M. Pugh and J. D. Altringham . 2005. The effect of gates on cave entry by swarming bats. Acta Chiropterologica 7:293–99. Google Scholar
• 25. H-U. Schnitzler, C. F. Moss, and A. Denzinger . 2003. From spatial orientation to food acquisition in echolocating bats. Trends in Ecology and Evolution 18:386–94. Google Scholar
• 26. R E. Sherwin, J. S. Altenbach, and S. Haymond . 2000. The responses of bats to gates Bat gate design: a technical interactive forum. Proceedings of bat conservation and mining: a technical interactive forum November 14–16, 2000. http://www.mcrcc.osme.gov/PDF/forums/Bat%20Gate/TOC.pdf. Accessed 27 October 2003. Google Scholar
• 27. C. P. Slade and B. S. Law . 2007. Seasonal changes in bats at a derelict mine in southern New South Wales. Australian Zoologist 34:173–80. Google Scholar
• 28. J. R. Speakman, P. I. Webb, and P. A. Racey . 1991. Effects of disturbance of the energy expenditure of hibernating bats. Journal of Applied Ecology 28:1087–1104. Google Scholar
• 29. D. W. Thomas, M. Dorais, and J. M. Bergeron . 1990. Winter energy budgets and costs of arousals for hibernating little brown bats, Myotis lucifugus. Journal of Mammalogy 7:475–479. Google Scholar
• 30. B. Thomson 2002. Australian handbook for the conservation of bats in mines and artificial cave bat habitats. Australian Centre for Mining Environmental Research. Kenmore, Queensland. 66. pp. Google Scholar
• 31. M. D. Tuttle and D. A R. Taylor . 1998. Bats and mines. Resource publication No. 3 — revised. Bat Conservation International. Austin. 50. pp. Google Scholar
• 32. D. H. White and J. T. Seginak . 1987. Cave gate designs for use in protecting endangered bats. Wildlife Society Bulletin 15:445–449. Google Scholar