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To name those lost: assessing extinction likelihood in the Australian vascular flora

  • J.L. Silcock (a1), A.R. Field (a2), N.G. Walsh (a3) and R.J. Fensham (a1)

Abstract

Extinction is a profound biological event, yet despite its finality it can be difficult to verify and many frameworks have been proposed to define formally that extinction has occurred. For most taxonomic groups and regions there is no reliable list of species considered to be probably or possibly extinct. The record of plant extinctions in Australia is no exception, characterized by high turn-over within lists, low transparency of attribution and lack of consistency between jurisdictions. This makes it impossible to evaluate how many plant taxa have become extinct in Australia. We present an ecological framework for assessing the likelihood of plant extinctions, based on taxonomic soundness, degree of habitat modification, detectability and search effort, underpinned by the best available expert knowledge. We show that, in sharp contrast to both the fate of the Australian fauna and prevailing assumptions, only 12 of 71 plant taxa currently listed as or assumed to be extinct are considered probably extinct, and a further 21 possibly extinct. Twenty taxa listed as or assumed to be extinct have dubious taxonomy or occurrence in Australia, and the remaining 18 taxa are considered possibly extant and further surveys are required to ascertain their status. The list of probably and possibly extinct plants is dwarfed by the number thought extinct but rediscovered since 1980. Our method can be used for vascular floras in other regions characterized by well-documented and curated floras and high levels of expert knowledge, and provides a transparent platform for assessing changes in the status of biodiversity.

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Copyright

Corresponding author

(Corresponding author) E-mail j.silcock@uq.edu.au

Footnotes

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Also at: Department of Environment and Science, Queensland Herbarium, Brisbane Botanic Gardens, Toowong, Australia

Supplementary material for this article is available at https://doi.org/10.1017/S0030605318001357

Footnotes

References

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Bailey, C. (2013) Shadow of the Thylacine: One Man's Epic Search for the Tasmanian Tiger. The Five Mile Press, Scoresby, Australia.
Barnosky, A.D., Matzke, N., Tomiya, S., Wogan, G.O.U., Swartz, B., Quental, T.B. et al. (2011) Has the Earth's sixth mass extinction already arrived? Nature, 471, 5157.
Bonham, K.J. (1997) Native land snails of King Island and the hunter group. The Tasmanian Naturalist, 119, 1022.
Boyd, I.L. & Stanfield, M.P. (1998) Circumstantial evidence for the presence of monk seals in the West Indies. Oryx, 32, 310316.
Briggs, J.D. & Leigh, J.H. (1996) Rare or Threatened Australian Plants. 4th edition.CSIRO Publishing, Canberra, Australia.
Burgman, M.A., Keith, D., Hopper, S.D., Widyatmoko, D. & Drill, C. (2007) Threat syndromes and conservation of the Australian flora. Biological Conservation, 134, 7382.
Butchart, S.H.M., Stattersfield, A.J. & Brooks, T.M. (2006) Going or gone: defining ‘possibly extinct’ species to give a truer picture of recent extinctions. Bulletin of the British Ornithologists’ Club, 126A, 724.
Byk, A., Bezdek, A., Gazurek, T., Kral, D. & Tylkowski, S. (2018) Ahermodontus bischoffi—rediscovery of an endemic dung beetle species (Coleoptera: Scarabaeidae: Aphodiinae) in Albania after more than 80 years. Zootaxa, 4370, 283288.
Byrne, M. & Hopper, S.D. (2008) Granite outcrops as ancient islands in old landscapes: evidence from the phylogeography and population genetics of Eucalyptus caesia (Myrtaceae) in Western Australia. Biological Journal of the Linnean Society, 93, 177188.
CHAH (Council of Heads of Australasian Herbaria) (2016) The Australasian Virtual Herbarium. http://avh.chah.org.au [accessed December 2016].
Chapman, A.D. (2009) Numbers of Living Species in Australia and the World. 2nd edition. Report for the Australian Biological Resources Study, Canberra, Australia. https://www.environment.gov.au/system/files/pages/2ee3f4a1-f130-465b-9c7a-79373680a067/files/nlsaw-2nd-complete.pdf [accessed 23 October 2108].
Collar, N.J. (1998) Extinction by assumption; or, the Romeo Error on Cebu. Oryx, 32, 239244.
Collen, B., Purvis, A. & Mace, G.M. (2010) When is a species really extinct? Testing extinction inference from a sighting record to inform conservation assessment. Diversity and Distributions, 16, 755764.
Davis, R.W. (2012) Ptilotus christineae is synonymous with the previously presumed extinct taxon P. pyramidatus. Nuytsia, 22, 335.
de Lírio, E.J., Freitas, J., Negrão, R., Martinelli, G. & Peixoto, A.L. (2017) A hundred years’ tale: rediscovery of Mollinedia stenophylla (Monimiaceae) in the Atlantic rainforest, Brazil. Oryx, 52, 437441.
Dooley, S. (2013) Out of the shadows. Australian Birdlife, 2, 2630.
Duretto, M.F., Orme, A., Rodd, J., Stables, M. & Toelken, H. (2017) Hibbertia fumana (Dilleniaceae), a species presumed to be extinct rediscovered in the Sydney region, Australia. Telopea, 20, 143146.
Fitzpatrick, J.W., Lammertink, M., Luneau, M.D., Gallagher, T.W., Harrison, B.R., Sparling, G.M. et al. (2005) Ivory-billed woodpecker (Campephilus principalis) persists in continental North America. Science, 308, 14601462.
Gibson, N. (2016) Western Australian plant taxa not collected for more than 50 yeras. Nuytsia, 27, 139164.
Halley, J.M., Monokrousos, N., Mazaris, A.D. & Vokou, D. (2017) Extinction debt in plant communities: where are we now? Journal of Vegetation Science, 28, 459461.
Office of Environment & Heritage (2017) Nielsen Park She-oak—Profile. New South Wales Government, Sydney, Australia. http://www.environment.nsw.gov.au/threatenedspeciesapp/profile.aspx?id=10039 [accessed 27 March 2018].
Hopper, S.D., Silveira, F.A.O. & Fiedler, P.L. (2016) Biodiversity hotspots and Ocbil theory. Plant and Soil, 403, 167216.
IUCN (2012) IUCN Red List categories. Version 3.1. 2nd edition. IUCN Species Survival Commission. World Conservation Union, Gland, Switzerland and Cambridge, UK.
IUCN Standards and Petitions Subcommittee (2017) Guidelines for Using the IUCN Red List Categories and Criteria. Version 13. Prepared by the Standards and Petitions Subcommittee. http://www.iucnredlist.org/documents/RedListGuidelines.pdf [accessed 13 July 2018].
Keith, D.A. (2000) Sampling designs, field techniques and analytical methods for systematic plant population surveys. Ecological Management and Restoration, 1, 125139.
Keith, D.A. & Burgman, M.A. (2004) The Lazarus effect: can the dynamics of extinct species lists tell us anything about the status of biodiversity? Biological Conservation, 117, 4148.
Keith, D.A., Butchart, S.H.M., Regan, H.M., Harrison, I., Akcakaya, H.R., Solow, A.R. & Burgman, M.A. (2017) Inferring extinctions I: a structured method using information on threats. Biological Conservation, 214, 320327.
Kirkpatrick, J.B. & Gilfedder, L. (1998) Conserving weedy natives: two Tasmanian endangered herbs in the Brassicaceae. Australian Journal of Ecology, 23, 466473.
Kolk, J. & Naaf, T. (2015) Herb layer extinction debt in highly fragmented temperate forests—completely paid after 160 years? Biological Conservation, 182, 164172.
Koopowitz, H. & Kaye, H. (eds) (1990) Plant Extinction: a Global Crisis. Christopher Helm, London, UK.
Leigh, J.H., Boden, R. & Briggs, J. (1984) Extinct and Endangered Plants of Australia. The Macmillan Company of Australia, South Melbourne, Australia.
Leigh, J.H., Briggs, J. & Hartley, W. (1981) Rare or Threatened Australian Plants. Australian National Parks and Wildlife Service, Canberra, Australia.
Lindenmayer, D.B. (2007) On Borrowed Time: Australia's Environmental Crisis and What We Must Do About It. CSIRO Publishing, Camberwell, Australia.
Mace, G.M., Collar, N.J., Gaston, K.J., Hilton-Taylor, C., Akcakaya, H.R., Leader-Williams, N. et al. (2008) Quantification of extinction risk: IUCN's system for classifying threatened species. Conservation Biology, 22, 14241442.
Nipperess, D.A. (2015) A separate creation: diversity, distinctiveness and conservation of Australian wildlife. In Austral Ark: The State of Wildlife in Australia and New Zealand (eds Stow, A., Maclean, N. & Holwell, G.I.), pp. 123. Cambridge University Press, Cambridge, UK.
Pimm, S.L., Jenkins, C.N., Abell, R., Brooks, T.M., Gittleman, Joppa, et al, L.N.. (2014) The biodiversity of species and their rates of extinction, distribution, and protection. Science, 344, 1246752.
Purvis, A., Jones, K.E. & Mace, G.M. (2000) Extinction. Bioessays, 22, 11231133.
Reed, J.M. (1996) Using statistical probability to increase confidence of inferring extinction. Conservation Biology, 10, 12831285.
Regan, H.M., Lupia, R., Drinnan, A.N. & Burgman, M.A. (2001) The currency and tempo of extinction. American Naturalist, 157, 110.
Richman, A., Case, T.J. & Schwaner, T.D. (1988) Natural and unnatural extinction rates of reptiles on islands. The American Naturalist, 131, 611630.
Rossini, R.A., Fensham, R.J., Stewart-Koster, B., Gotch, T. & Kennard, M. (2018) Biogeographical patterns of endemic diversity and its conservation in Australia's artesian desert springs. Diversity and Distributions, 24, 11992016.
Ryan, J.C. (2009) Why do extinctions matter? Mourning the loss of indigenous flora in the southwest of Western Australia. Philament, 15, 130.
Schrire, B. (2007) Going… going… is it gone? Streblorrhiza speciosa – the Phillip Island glory pea. Curtis's Botanical Magazine, 24, 196197.
Scott, J.K. & Yeoh, P.B. (1995) The rediscovery and distribution of Rumex drummondii (Polygonaceae), in south-western Australia. Australian Journal of Botany, 43, 397405.
Silcock, J.L., Healy, A.J. & Fensham, R.J. (2014) Lost in time and space: re-assessment of conservation status in an arid-zone flora through targeted field survey. Australian Journal of Botany, 62, 674688.
Sochor, M., Egertova, Z., Hrones, M. & Dancak, M. (2018) Rediscovery of Thismia neptunis (Thismiaceae) after 151 years. Phytotaxa, 340, 7178.
Solow, A.R. (2005) Inferring extinction from a sighting record. Mathematical Biosciences, 195, 4755.
Szabo, J.K., Khwaja, N., Garnett, S.T. & Butchart, S.H. (2012) Global patterns and drivers of avian extinctions at the species and subspecies level. PLOS ONE, 7, e47080.
Thackway, R. & Cresswell, I.D. (1995) An Interim Biogeographic Regionalisation for Australia: a Framework for Setting Priorities in the National Reserve System Cooperative Program. Version 4.0. Australian Nature Conservation Agency, Canberra, Australia.
Thompson, C.J., Koshkina, V., Burgman, M.A., Butchart, S.H.M. & Stone, L. (2017) Inferring extinctions II: a practical, iterative model based on records and surveys. Biological Conservation, 214, 328335.
Traill, L.W., Brook, B.W., Frankham, R.R. & Bradshaw, C.J.A. (2010) Pragmatic population viability targets in a rapidly changing world. Biological Conservation, 143, 2834.
Vellend, M., Verheyen, K., Jacquemyn, H., Kolb, A., Van Calster, H., Peterken, G. & Hermy, M. (2006) Extinction debt of forest plants persists for more than a century following habitat fragmentation. Ecology, 87, 542548.
Wapstra, M., Duncan, F., Buchanan, A. & Schahinger, R. (2006) Finding a botanical Lazarus: tales of Tasmanian plant species ‘risen from the dead’. The Tasmanian Naturalist, 128, 6185.
Wege, J.A., Thiele, K.R., Shephard, K.A., Butcher, R., Macfarlane, T.D. & Coates, D.J. (2014) Strategic taxonomy in a biodiverse landscape: a novel approach to maximizing conservation outcomes for rare and poorly known flora. Biodiversity and Conservation, 24, 1732.
Williamson, M. (1989) Natural extinction on islands. Philosophical Transactions of the Royal Society B, 325, 457468.
Woinarski, J.C.Z., Burbidge, A.A. & Harrison, P.L. (2015) Ongoing unravelling of a continental fauna: decline and extinction of Australian mammals since European settlement. Proceedings of the National Academy of Sciences of the United States of America, 112, 45314540.

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To name those lost: assessing extinction likelihood in the Australian vascular flora

  • J.L. Silcock (a1), A.R. Field (a2), N.G. Walsh (a3) and R.J. Fensham (a1)

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