Comparing wild and reintroduced populations of the threatened orchid Diuris fragrantissima (Orchidaceae) in south-eastern Australia
Michael Duncan A B and Paul D. Moloney A
+ Author Affiliations
- Author Affiliations
A Arthur Rylah Institute for Environmental Research, Department of Environment, Land, Water and Planning, PO Box 137, Heidelberg, Vic. 3084, Australia.
B Corresponding author. Email: michael.duncan@delwp.vic.gov.au
Australian Journal of Botany 66(7) 459-467 https://doi.org/10.1071/BT18047
Submitted: 6 March 2018 Accepted: 4 September 2018 Published: 1 October 2018
Abstract
Orchids have high rates of speciation and extinction, and are over-represented on threatened species lists. Reintroductions are being used with increasing frequency as an important tool for threatened orchid recovery. The ultimate aim of these reintroductions is to create a self-sustaining population that will reduce the risk of extinction for the species. In this case study, we test the hypotheses that state transition, annual survival, and seed production rates in a reintroduced population were equivalent to those in the wild population. These hypotheses were tested using long-term demographic monitoring datasets from a wild and a reintroduced population of Diuris fragrantissima, and analysed using Bayesian multistate capture–recapture and multinomial models. The results showed that emergent plants at the reintroduction site were more likely to transition to vegetative or unobserved states, and less likely to flower in the following year, than those at the wild site. This resulted in a strong trend through time away from emergent life states at the reintroduction site. The estimated annual survival rate was >90% at the wild site, and <80% in five of the seven years at the reintroduction site. Flowering was the most frequently recorded life state at the wild site. The fate of an individual flower was not affected by site (wild or reintroduction), but an increase in rainfall increased the probability that a flower would set seed and decreased the probability that it would be browsed. The reintroduction has failed to produce a stable, sustainable, long-term population, but it has been valuable in providing information that will inform the development and improvement of future D. fragrantissima reintroductions. Improving our knowledge in these areas should increase the chances of future D. fragrantissima reintroductions being assessed as a success.
References
Agresti A (2002) Logit models for multinomial responses. In ‘Categorical data analysis’. (2nd edn) pp. 267–313. (John Wiley & Sons Inc.: New York)Albrecht MA, Maschinski J (2012) Influence of founder population size, propagule stages, and life history on the survival of reintroduced plant populations. In ‘Plant reintroduction in a changing climate’. (Eds J Maschinski, KE Haskins) pp. 171–188. (Island Press/Centre for Resource Economics: Seattle, WA, USA)
BOM (2016) Climate statistics for weather station #87031. Available at: www.bom.gov.au [verified 17 June 2016]
Brundrett M (2016) Using vital statistics and core habitat maps to manage critically endangered orchids in the Western Australian wheatbelt. Australian Journal of Botany 64, 51–64.
| Using vital statistics and core habitat maps to manage critically endangered orchids in the Western Australian wheatbelt.Crossref | GoogleScholarGoogle Scholar |
Burgman M, Lindenmayer D (1998) ‘Conservation biology for the Australian environment.’ (Surrey Beatty: Sydney)
Cropper SC (1993) ‘Management of endangered species.’ (CSIRO Publishing: Melbourne)
Cropper SC, Calder DM (1990) The floral biology of Thelymitra epipactoides (Orchidaceae), and the implications of pollination by deceit on the survival of this rare orchid. Plant Systematics and Evolution 170, 11–27.
| The floral biology of Thelymitra epipactoides (Orchidaceae), and the implications of pollination by deceit on the survival of this rare orchid.Crossref | GoogleScholarGoogle Scholar |
Dalrymple SE, Banks E, Stewart GB, Pullin AS (2012) A meta-analysis of threatened plant reintroductions from across the globe. In ‘Plant reintroduction in a changing climate’. (Eds J Maschinski, KE Haskins) pp. 31–50. (Island Press/Centre for Resource Economics: Seattle, WA, USA)
Dockrill A (1964) The eastern Australian orchid, Diuris punctata. Victorian Naturalist 81, 128–138.
Duncan MJ, Pritchard A, Coates F (2005) Major threats to endangered orchids of Victoria, Australia. Selbyana 26, 189–195.
Gelman AB, Carlin JS, Stern HS, Rubin DB (2004) ‘Bayesian data analysis.’ (2nd edn) (Chapman and Hall/CRC: Boca Raton, FL USA)
Glanznig A (1995) Native vegetation clearance, habitat loss and biodiversity decline – an overview of recent native vegetation clearance in Australia and its implications for biodiversity. Biodiversity series, paper no. 6.’ (Commonwealth Department of the Environment, Sport and Territories: Canberra)
Godefroid S, Piazza C, Rossi G, Buord S, Stevens AD, Aguraiuja R, Vanderborght T (2011) How successful are plant species reintroductions? Biological Conservation 23, 33–75.
Gorbunov YN, Dzybov DS, Kuzmin ZE, Smirnov IA (2008) ‘Methodological recommendations for botanic gardens on the reintroduction of rare and threatened plants.’ (Grif & Co: Tula, Svobody, Russia)
Guerrant EO (2012) Characterising two decades of rare plant reintroductions. In ‘Plant reintroduction in a changing climate’. (Eds J Maschinski, KE Haskins) pp. 9–29. (Island Press/Centre for Resource Economics: Seattle, WA, USA)
Guerrant EO, Kaye TN (2007) Reintroduction of rare and endangered plants: common factors, questions and approaches. Australian Journal of Botany 55, 362–370.
| Reintroduction of rare and endangered plants: common factors, questions and approaches.Crossref | GoogleScholarGoogle Scholar |
Kaye TN (2009) Toward successful reintroductions: the combined importance of species traits. Site quality, and restoration technique. In ‘Proceedings of the CNPS Conservation Conference 17–19 January 2009’, pp. 99–106. (California Native Plant Society: Sacramento, CA, USA)
Kery M, Gregg KB (2004) Demographic analysis of dormancy and survival in the terrestrial orchid Cypripedium reginae. Journal of Ecology 92, 686–695.
| Demographic analysis of dormancy and survival in the terrestrial orchid Cypripedium reginae.Crossref | GoogleScholarGoogle Scholar |
Kery M, Schaub M (2012) ‘Bayesian population analysis using WinBUGS: A hierarchical perspective.’ (Academic Press: Waltham, CA, USA)
Lunn D, Jackson C, Best N, Thomas A, Spiegelhalter D (2012) ‘The BUGS book. A practical introduction to bayesian analysis.’ (CRC Press: London)
Maschinski J, Wright SJ (2006) Using ecological theory to plan restorations of the endangered beach Jacquemontia in fragmented habitats. Journal for Nature Conservation 14, 180–189.
| Using ecological theory to plan restorations of the endangered beach Jacquemontia in fragmented habitats.Crossref | GoogleScholarGoogle Scholar |
Maunder M (1992) Plant reintroduction: an overview. Biodiversity and Conservation 1, 51–61.
| Plant reintroduction: an overview.Crossref | GoogleScholarGoogle Scholar |
McCormick MK, Jacquemyn H (2014) What constrains the distribution of orchid populations? New Phytologist 202, 392–400.
| What constrains the distribution of orchid populations?Crossref | GoogleScholarGoogle Scholar |
Menges ES (2008) Restoration demography and genetics of plants: when is a translocation successful? Australian Journal of Botany 56, 187–196.
| Restoration demography and genetics of plants: when is a translocation successful?Crossref | GoogleScholarGoogle Scholar |
Morgan JW (2000) Reproductive success in re-established versus natural populations of a threatened grassland daisy (Rutidosis leptorrhynchoides). Conservation Biology 14, 780–785.
| Reproductive success in re-established versus natural populations of a threatened grassland daisy (Rutidosis leptorrhynchoides).Crossref | GoogleScholarGoogle Scholar |
Murphy A, Webster A, Knight C, Lester K (2008) ‘National recovery plan for the sunshine diuris, Diuris fragrantissima.’ (Victorian Department of Sustainability and Environment: East Melbourne)
Pavlik BM (1996) Defining and measuring success. In ‘Restoring diversity. Strategies for reintroduction of endangered plants’. (Eds DL Falk, CI Millar, M Olwell) pp. 127–155. (Island Press: Washington DC)
Phillips RD, Brown AP, Dixon KW, Hopper SD (2011) Orchid biogeography and factors associated with rarity in a biodiversity hotspot, the southwest Australian floristic region. Journal of Biogeography 38, 487–501.
| Orchid biogeography and factors associated with rarity in a biodiversity hotspot, the southwest Australian floristic region.Crossref | GoogleScholarGoogle Scholar |
Plummer M (2003) JAGS: A Program for Analysis of Bayesian Graphical Models Using Gibbs Sampling. Paper presented at the 3rd International Workshop on Distributed Statistical Computing, Vienna, Austria.
R Core Team (2014) ‘R: A language and environment for statistical computing.’ (R Foundation for Statistical Computing: Vienna, Austria) Available at: http://www.R-project.org/ [verified 6 May 2017]
Reiter N, Whitfield J, Pollard G, Bedggood W, Argall M, Dixon K, Davis B, Swarts N (2016) Orchid reintroductions: an evaluation of success and ecological considerations using key comparative studies from Australia. Plant Ecology 217, 81–95.
| Orchid reintroductions: an evaluation of success and ecological considerations using key comparative studies from Australia.Crossref | GoogleScholarGoogle Scholar |
Scade A, Brundrett M, Batty A, Dixon K, Sivasithamparam K (2006) Survival of transplanted terrestrial orchid seedlings in urban bushland habitats with high or low weed cover. Australian Journal of Botany 54, 383–389.
| Survival of transplanted terrestrial orchid seedlings in urban bushland habitats with high or low weed cover.Crossref | GoogleScholarGoogle Scholar |
Shefferson RP, Sandercock BK, Proper J, Beissinger SR (2001) Estimating dormancy and survival of a rare herbaceous perennial using mark–recapture models. Ecology 82, 145–156.
Smith Z (2006) Developing a reintroduction plan for the threatened terrestrial orchid Diuris fragrantissima. PhD thesis, School of Resource Management, Faculty of Land and Food Resources, The University of Melbourne, Melbourne.
Smith Z, James E, McLean C (2007) Experimental reintroduction of the threatened terrestrial orchid Diuris fragrantissima. Lankesteriana 7, 377–380.
Smith Z, James E, McDonnell M, McLean C (2009) Planting conditions improve translocation success of the endangered terrestrial orchid Diuris fragrantissima. Australian Journal of Botany 57, 200–209.
| Planting conditions improve translocation success of the endangered terrestrial orchid Diuris fragrantissima.Crossref | GoogleScholarGoogle Scholar |
Smith Z, James E, McLean C (2010) Mycorrhizal specificity of Diuris fragrantissima and persistence in a reintroduced population. Australian Journal of Botany 58, 97–106.
| Mycorrhizal specificity of Diuris fragrantissima and persistence in a reintroduced population.Crossref | GoogleScholarGoogle Scholar |
Su Y-S, Yajima M (2012) R2jags: A package for running jags from R. Available at: https://cran.r-project.org/web/packages/R2jags/index.html [verified 7 September 2018]
Swarts ND, Dixon KW (2009) Terrestrial orchid conservation in the age of extinction. Annals of Botany 104, 543–556.
| Terrestrial orchid conservation in the age of extinction.Crossref | GoogleScholarGoogle Scholar |
Tremblay R, Perez M, Larcombe M, Brown A, Quarmby J, Bickerton D, French G, Bould A (2009) Dormancy in Caladenia: a bayesian approach to evaluating latency. Australian Journal of Botany 57, 340–350.
| Dormancy in Caladenia: a bayesian approach to evaluating latency.Crossref | GoogleScholarGoogle Scholar |
Tyndall RW, Groller PL (2006) Transplant survival, reproductive output, and population monitoring in Desmodium ochroleucum. Castanea 71, 329–332.
| Transplant survival, reproductive output, and population monitoring in Desmodium ochroleucum.Crossref | GoogleScholarGoogle Scholar |
Waite S, Hutchings MJ (1991) The effects of different management regimes on the population dynamics of Ophrys sphegodes: analysis and description using matrix models. In ‘Population ecology of terrestrial orchids’. (Eds TCE Wells, JH Willems) pp. 161–176. (SPB Academic Publishing: The Hague, The Netherlands)
Walter K, Gillett J (1997) ‘IUCN red list of threatened plants.’ (International Union for the Conservation of Nature, Species Survival Commission: Gland, Switzerland)
WCSP (2016) World checklist of selected plant families. Facilitated by the Royal Botanic Gardens, Kew. Available at: http://apps.kew.org/wcsp/ [verified 29 April 2016]
Wheeler BD, Lambley PW, Geeson J (1998) Liparis loeselii in eastern England: constraints on distribution and population development. Botanical Journal of the Linnean Society 141, 141–158.
Willis J (1970) ‘A handbook to plants in Victoria. Vol.1: Ferns, conifers and monocotyledons.’ (Melbourne University Press: Carlton)
