Symposium Booklet

Total Page:16

File Type:pdf, Size:1020Kb

Symposium Booklet Date: Friday 18 March 2016 SYMPOSIUM BOOKLET Location: A one‐day symposium on eucalypt diversity The Royal Society of and conservation: scientific insights into the Victoria, future of Australian forests, woodlands and 8 La Trobe Street biota. Melbourne, Victoria Brought to you by: The Bjarne K Dahl Trust & The Royal Society of Victoria Welcome to the 2016 Conserving Eucalypts Symposium, brought to you by the Bjarne K Dahl Trust and the Royal Society of Victoria. We would like to thank the presenters for volunteering their time and wisdom to the day’s proceedings. Today’s symposium is part of National Eucalypt Day 2016 (#NED2016) celebrations promoted by the Bjarne K Dahl Trust. Further information can be found at dahltrust.org.au and at our respective Twitter sites @DahlTrust and @RoyalSocietyVic . Please write blog posts or Tweets about your symposium experience [respecting the rule of not using people’s names unless you have permission from them] and send a link to your post to @DahlTrust and @RoyalSocietyVic. Use #NED2016 as a tag to contribute to conversations around National Eucalypt Day 2016. Table of Contents Information for Attendees .............................................................................. 3 Program .......................................................................................................... 4 Abstracts ......................................................................................................... 5 Elective Field Trip: Mt Rothwell Biodiversity Interpretation Centre ............... 14 Who we are .................................................................................................. 15 Contact Us .................................................................................................... 15 #NED2016 @DahlTrust @RoyalSocietyVic Page 2 of 16 Information for Attendees Public Transport: A tram stop is located at the front entrance to 8 La Trobe Street on the corner of Exhibition Street, stop ID 18011, trams 11, 12, 30, 75, 86 and 109 pass through this stop. Parliament Station is a 5‐ 10 min walk along La Trobe Street and Spring Street. Car Parking is available along La Trobe Street and Exhibition Street. Limited spaces are available on site at the Royal Society of Victoria. Public car parking is also situated at the Melbourne Museum across the Exhibition Gardens. Food: All refreshments and lunch will be provided in the Burke and Wills room on the ground floor. No food or drink is to be taken into the Ellery Theatre. Toilets are located in the stairwell between the ground and first floors. Emergency evacuation: the emergency assembly point is located in the car park of the Royal Society of Victoria building. An air horn will sound in event of an emergency requiring evacuation. Event Moderator: Starts session, keeps questions on‐topic, ends session in a timely manner. Videographer: All presentations will be recorded for future use in media and conveying of key points made by each presenter. Mobile phones must be set on silent or turned off during the presentations. #NED2016 @DahlTrust @RoyalSocietyVic Page 3 of 16 Program 1. 8:30am Registration 2. 9am Welcome, Dr Bill Birch AM, President of The Royal Society of Victoria 3. Session 1: Applying genetics for conservation planning First Session Moderator: Professor Pauline Ladiges AO FAA Key Note Speaker: Professor Mick McCarthy, Dr Laura Pollock ‐ Conserving eucalypt lineages and spatial prioritisation with reference to Victoria; Theme 1: Genomics and the phylogeny of the eucalypts Dr Michael Bayly, Co‐author Dr Josquin Tibbits, University of Melbourne ‐ Applying DNA technology; big picture evolutionary history and diversity of the eucalypt group 4. 10:30am Morning tea Theme 2: Applying genetics for spatial analysis and conservation of eucalypts Professor Brad Potts, University of Tasmania ‐ Managing our eucalypt gene pools: assessing the risk of exotic gene flow Dr Suzanne Prober, CSIRO ‐ Adaptation to climate in widespread eucalypts Associate Professor Peter Vesk, University of Melbourne ‐ Spatial analysis, eucalypt seed production and regeneration 5. 12:30pm Lunch 6. Session 2: Functional role and management of eucalypt forests and woodlands Second Session Moderator Professor Leon Bren Key Note Speaker: Professor David Lindenmayer, Australian National University ‐ Status of Australia’s old growth eucalypt forests Theme 3: Climate change influences on fire risk and management Associate Professor Kevin Tolhurst, University of Melbourne ‐ Eucalypt, fire and risk management informing policy 7. 2:30pm Afternoon tea Theme 4: Recommendations for conservation and silviculture management practices Professor Andrew Bennett, La Trobe University ‐ Eucalypts, wildlife and nature conservation: from individual trees to landscape patterns Associate Professor Patrick Baker, University of Melbourne – A forest science perspective on sustainable management and conservation 8. Sum up of Symposium messages 9. Holding Place for Dahl Trust award presentation 10. 4:30pm Closing acknowledgements 11. Light Refreshments #NED2016 @DahlTrust @RoyalSocietyVic Page 4 of 16 Abstracts Professor Michael McCarthy School of Biosciences The University of Melbourne Phone: +61 3 8344 6856 Email: [email protected] Conserving eucalypt lineages and spatial prioritisation with reference to Victoria Most of us will have a favourite eucalypt species, and we might like to see its conservation prioritized. However, with approximately half of the phylogenetic diversity of Victoria’s eucalypts under‐represented in the current reserve system, playing personal favourites might not be the best way to conserve this aspect of our cultural heritage. Where are the conservation priorities for eucalypts in Victoria? We integrate phylogenetic diversity with spatial reserve prioritisation to evaluate how the existing reserve system in Victoria might be expanded to better capture the evolutionary lineages of eucalypts. A modest expansion in protected areas of 5 percent (< 1 percent of the state area) would increase protected phylogenetic diversity by 33 percent over current levels of protection. Newly designated tourism development zones in national parks, which contain both protected and non‐protected areas, contain over half of the phylogenetic diversity found in national parks with some species and clades falling entirely within development zones within the national parks. This approach of using phylogenetic diversity in spatial prioritisation could be extended to any clade or area that has spatial and phylogenetic data. Our results demonstrate the relevance of phylogenetic diversity to regional conservation policy by highlighting that small but strategically‐located areas disproportionally impact the preservation of evolutionary lineages. #NED2016 @DahlTrust @RoyalSocietyVic Page 5 of 16 Dr Michael Bayly School of Biosciences The University of Melbourne Phone: +613 8344 5055 Email: [email protected] Evolutionary history of eucalypts: overview and insights from DNA studies The eucalypt group includes seven genera: Allosyncarpia, Stockwellia, Eucalyptopsis, Arillastrum, Eucalyptus, Corymbia and Angophora. The first four are small rainforest genera, each with 1(‐2) species and variously restricted to northern Australia, New Guinea and New Caledonia. The last three genera are larger, comprising c. 900 species in total, and occurring primarily in Australia, but with some species in New Guinea, New Britain, Indonesia and the southern Philippines. This talk will give an overview of the evolutionary history of the eucalypt group, incorporating evidence from morphology and fossils, and emphasising insights gained through DNA studies. It will consider evolutionary patterns at a range of scales from the relationships of genera to those of closely related species in the forests of south‐eastern Australia. #NED2016 @DahlTrust @RoyalSocietyVic Page 6 of 16 Professor Brad Potts Biological Sciences The University of Tasmania Phone: +61 3 6226 2641 Email: [email protected] Managing our eucalypt gene pools: assessing the risk of exotic gene flow Eucalypts are endemic to Australia and islands to its north. However, they have been translocated around the world since the 19th Century and are Australia’s major germplasm contribution to the world. There are now over 20 million hectares of eucalypt plantations globally. These plantations are grown mainly for pulpwood but there is expanding interest in their use as a renewable source of solid wood products and energy. In Australia, the eucalypt plantation estate is nearing 1 million ha. It is located mainly in temperate regions, and is dominated by Eucalyptus globulus and E. nitens (subgenus Symphyomyrtus), which are grown mainly outside their natural ranges. While eucalypt species from different major subgenera do not hybridise, hybrids within subgenera are often reported, including hybrids with plantation species. Concerns were raised in the late 1990s that pollen‐mediated gene flow from locally exotic plantation eucalypts may threaten the integrity of adjacent native eucalypt gene pools. As Australia is the centre‐of‐origin of most eucalypt species, exotic gene flow is one of the many issues that requires management for industry sustainability and certification purposes. We thus conducted research to underpin risk assessment and management strategies to minimise the offsite genetic impacts of plantations. Our initial focus was the island of Tasmania, where E. nitens was introduced in the late 1980s and by
Recommended publications
  • Evolutionary Relationships in Eucalyptus Sens. Lat. – a Synopsis
    Euclid - Online edition Evolutionary relationships in Eucalyptus sens. lat. – a synopsis This article complements the introductory essay about eucalypts included in the "Learn about Eucalypts" section. Its aim is to provide an up-to-date account of the outcomes of research derived from different groups during the past 5 years relating to relationships within Eucalyptus s.s. As such it includes only those publications and hypotheses relating to higher level relationships of major groupings within the eucalypts. Some of the research reported below also provides insights into biogeographic relationships of the eucalypt group – in large part these are not the focus of this article and are not discussed in detail. Introduction The first comprehensive classification of the eucalypts was published by Blakely in 1934, in which he treated more than 600 taxa, building on earlier work of Maiden and Mueller. Blakely's classification remained the critical reference for Eucalyptus taxonomists for the next 37 years when a new but informal classification was published by Pryor and Johnson (1971). In this work the authors divided the genus into seven subgenera, and although of an informal nature, presented a system of great advance on Blakely's treatment. The small genus Angophora was retained. The next 20 years saw much debate about the naturalness of Eucalyptus and whether other genera should be recognized (e.g., Johnson 1987). Based on morphological data, Hill and Johnson in 1995 proposed a split in the genus and recognition of the genus Corymbia. This new genus of c. 113 species, comprised the ghost gums and the bloodwoods, and Hill and Johnson concluded that Corymbia is the sister group to Angophora, with the synapomorphy of the distinctive cap cells on bristle glands (Ladiges 1984) being unambiguous.
    [Show full text]
  • BIODIVERSITY CONSERVATION on the TIWI ISLANDS, NORTHERN TERRITORY: Part 1. Environments and Plants
    BIODIVERSITY CONSERVATION ON THE TIWI ISLANDS, NORTHERN TERRITORY: Part 1. Environments and plants Report prepared by John Woinarski, Kym Brennan, Ian Cowie, Raelee Kerrigan and Craig Hempel. Darwin, August 2003 Cover photo: Tall forests dominated by Darwin stringybark Eucalyptus tetrodonta, Darwin woollybutt E. miniata and Melville Island Bloodwood Corymbia nesophila are the principal landscape element across the Tiwi islands (photo: Craig Hempel). i SUMMARY The Tiwi Islands comprise two of Australia’s largest offshore islands - Bathurst (with an area of 1693 km 2) and Melville (5788 km 2) Islands. These are Aboriginal lands lying about 20 km to the north of Darwin, Northern Territory. The islands are of generally low relief with relatively simple geological patterning. They have the highest rainfall in the Northern Territory (to about 2000 mm annual average rainfall in the far north-west of Melville and north of Bathurst). The human population of about 2000 people lives mainly in the three towns of Nguiu, Milakapati and Pirlangimpi. Tall forests dominated by Eucalyptus miniata, E. tetrodonta, and Corymbia nesophila cover about 75% of the island area. These include the best developed eucalypt forests in the Northern Territory. The Tiwi Islands also include nearly 1300 rainforest patches, with floristic composition in many of these patches distinct from that of the Northern Territory mainland. Although the total extent of rainforest on the Tiwi Islands is small (around 160 km 2 ), at an NT level this makes up an unusually high proportion of the landscape and comprises between 6 and 15% of the total NT rainforest extent. The Tiwi Islands also include nearly 200 km 2 of “treeless plains”, a vegetation type largely restricted to these islands.
    [Show full text]
  • The Eucalypts of Northern Australia: an Assessment of the Conservation Status of Taxa and Communities
    The Eucalypts of Northern Australia: An Assessment of the Conservation Status of Taxa and Communities A report to the Environment Centre Northern Territory April 2014 Donald C. Franklin1,3 and Noel D. Preece2,3,4 All photographs are by Don Franklin. Cover photos: Main photo: Savanna of Scarlet-flowered Yellowjacket (Eucalyptus phoenicea; also known as Scarlet Gum) on elevated sandstone near Timber Creek, Northern Territory. Insets: left – Scarlet-flowered Yellowjacket (Eucalyptus phoenicea), foliage and flowers centre – reservation status of eucalypt communities right – savanna of Variable-barked Bloodwood (Corymbia dichromophloia) in foreground against a background of sandstone outcrops, Keep River National Park, Northern Territory Contact details: 1 Ecological Communications, 24 Broadway, Herberton, Qld 4887, Australia 2 Biome5 Pty Ltd, PO Box 1200, Atherton, Qld 4883, Australia 3 Research Institute for Environment and Livelihoods, Charles Darwin University, Darwin, NT 0909, Australia 4 Centre for Tropical Environmental & Sustainability Science (TESS) & School of Earth and Environmental Sciences, James Cook University, PO Box 6811, Cairns, Qld 4870, Australia Copyright © Donald C. Franklin, Noel D. Preece & Environment Centre NT, 2014. This document may be circulated singly and privately for the purpose of education and research. All other reproduction should occur only with permission from the copyright holders. For permissions and other communications about this project, contact Don Franklin, Ecological Communications, 24 Broadway, Herberton, Qld 4887 Australia, email [email protected], phone +61 (0)7 4096 3404. Suggested citation Franklin DC & Preece ND. 2014. The Eucalypts of Northern Australia: An Assessment of the Conservation Status of Taxa and Communities. A report to Kimberley to Cape and the Environment Centre NT, April 2014.
    [Show full text]
  • Arillastrum Gummiferum) – New Caledonia’S Eucalypt Mike Wilcox
    Le chêne gomme (Arillastrum gummiferum) – New Caledonia’s eucalypt Mike Wilcox The term eucalypt is normally used as the common 1992) at altitudes of 50 to 350 m.. As well as being of name for the genus Eucalyptus (Myrtaceae: phylogenetic interest as a eucalypt relative, it is (or Leptospermoideae), the recently segregated genus was) one of New Caledonia’s most economically and Corymbia, and Angophora. These are all typical ecologically significant trees. It grows gregariously in Australian trees, with just a few Eucalyptus and mainly pure stands and is one of the largest trees of Corymbia occurring in New Guinea, eastern Indonesia, the maquis minier (up to 35 m tall and 110 cm and the Philippines. diameter), though it has been much diminished in abundance by logging, and also by fire to which it is Both from classical morphological similarities (Johnson very sensitive. Log lengths were typically 8 to 12 m. 1972; Briggs & Johnson 1979) and the more modern Its wood is dark red in colour, strong and durable, and cladistic and DNA investigations (Ladiges & Humphries impregnated with resin, and has been much exploited 1983; Ladiges et al. 1995; Steane et al. 2002; Udovicic as roundwood for mine props, railings, and telephone & Ladiges 2002; Ladiges et al. 2003), the term poles, and piles. As sawn timber it was used for heavy “eucalypt” has had to been widened to accommodate construction, exterior joinery, flooring, and for the four other myrtaceous genera - Eucalytopsis, keels of boats (Sarlin 1954). The famous bridge (Pont Allosyncarpia, Stockwellia, and Arillastrum. Thus seven Perignon) in the Parc Provincial Rivière Bleue is built genera are now reckoned to form the eucalypt group, from it.
    [Show full text]
  • The Archaeology of the Aru Islands, Eastern Indonesia
    terra australis 22 Terra Australis reports the results of archaeological and related research within the south and east of Asia, though mainly Australia, New Guinea and island Melanesia — lands that remained terra australis incognita to generations of prehistorians. Its subject is the settlement of the diverse environments in this isolated quarter of the globe by peoples who have maintained their discrete and traditional ways of life into the recent recorded or remembered past and at times into the observable present. Since the beginning of the series, the basic colour on the spine and cover has distinguished the regional distribution of topics as follows: ochre for Australia, green for New Guinea, red for South-East Asia and blue for the Pacific Islands. From 2001, issues with a gold spine will include conference proceedings, edited papers and monographs which in topic or desired format do not fit easily within the original arrangements. All volumes are numbered within the same series. List of volumes in Terra Australis Volume 1: Burrill Lake and Currarong: coastal sites in southern New South Wales. R.J. Lampert (1971) Volume 2: Ol Tumbuna: archaeological excavations in the eastern central Highlands, Papua New Guinea. J.P. White (1972) Volume 3: New Guinea Stone Age Trade: the geography and ecology of traffic in the interior. I. Hughes (1977) Volume 4: Recent Prehistory in Southeast Papua. B. Egloff (1979) Volume 5: The Great Kartan Mystery. R. Lampert (1981) Volume 6: Early Man in North Queensland: art and archaeology in the Laura area. A. Rosenfeld, D. Horton and J. Winter (1981) Volume 7: The Alligator Rivers: prehistory and ecology in western Arnhem Land.
    [Show full text]
  • Oldest Known Eucalyptus Macrofossils Are from South America
    Oldest known Eucalyptus macrofossils are from South America plos.org create account sign in PUBLISH ABOUT BROWSE SEARCH advanced search OPEN ACCESS PEER-REVIEWED RESEARCH ARTICLE 52 68 Save Citation Oldest Known Eucalyptus Macrofossils Are from South America 9,938 41 View Share María A. Gandolfo , Elizabeth J. Hermsen , María C. Zamaloa, Kevin C. Nixon, Cynthia C. González, Peter Wilf, N. Rubén Cúneo, Kirk R. Johnson Published: June 28, 2011 https://doi.org/10.1371/journal.pone.0021084 Article Authors Metrics Comments Media Coverage Download PDF Print Share Reader Comments (0) Figures Media Coverage ADVERTISEMENT Figures Abstract The evolutionary history of Eucalyptus and the eucalypts, the larger clade of seven genera including Eucalyptus that today have a natural distribution almost exclusively in Australasia, is poorly documented from the fossil record. Little physical evidence exists bearing on the ancient geographical distributions or morphologies of plants within the clade. Herein, we introduce fossil material of Eucalyptus from the early Eocene (ca. 51.9 Ma) Laguna del Hunco paleoflora of Chubut Province, Argentina; specimens include multiple leaves, infructescences, and dispersed capsules, several flower buds, and a single flower. Morphological similarities that relate the fossils to extant eucalypts include leaf shape, venation, and epidermal oil glands; infructescence structure; valvate capsulate fruits; and operculate flower buds. The presence of a staminophore scar on the fruits links them to Eucalyptus, and the presence of a transverse scar on the flower buds indicates a relationship to Eucalyptus subgenus Symphyomyrtus. Phylogenetic analyses of morphological data alone and combined with aligned sequence data from a prior study including 16 extant eucalypts, one outgroup, and a terminal representing the fossils indicate that the fossils are nested within Eucalyptus.
    [Show full text]
  • Phylogenetic Studies of Eucalypts: Fossils, Morphology and Genomes
    CSIRO Publishing The Royal Society of Victoria, 128, 12–24, 2016 www.publish.csiro.au/journals/rs 10.1071/RS16002 PHYLOGENETIC STUDIES OF EUCALYPTS: FOSSILS, MORPHOLOGY AND GENOMES Michael J. Bayly School of BioSciences, The University of Melbourne, Victoria 3010, Australia Correspondence: Michael Bayly, [email protected] ABSTRACT: The eucalypt group includes seven genera: Eucalyptus, Corymbia, Angophora, Eucalyptopsis, Stockwellia, Allosyncarpia and Arillastrum. Knowledge of eucalypt phylogeny underpins classification of the group, and facilitates understanding of their ecology, conservation and economic use, as well as providing insight into the history of Australia’s flora. Studies of fossils and phylogenetic analyses of morphological and molecular data have made substantial contributions to understanding of eucalypt relationships and biogeography, but relationships among some genera are still uncertain, and there is controversy about generic circumscription of the bloodwood eucalypts (genus Corymbia). Relationships at lower taxonomic levels, e.g. among sections and series of Eucalyptus, are also not well resolved. Recent advances in DNA sequencing methods offer the ability to obtain large genomic datasets that will enable improved understanding of eucalypt evolution. Keywords: Angophora, Corymbia, Eucalyptus, fossils, molecular phylogenetics INTRODUCTION As an example of a relatively new application of phylogenetic information, McCarthy and colleagues Eucalypts are quintessential Australian plants. They make incorporated phylogenetic
    [Show full text]
  • IVG Forest Conservation Report 5B: Giant Eucalypt Forests
    IVG Forest Conservation Report 5B: Giant Eucalypt Forests IVG FOREST CONSERVATION REPORT 5B GIANT EUCALYPT FORESTS – A GLOBALLY UNIQUE FIRE-ADAPTED RAIN FOREST Note: This report forms part of the reference material utilized in Chapter 1 of IVG Report 5A, “Tall Eucalypt Forests as World Heritage”. Tng YPD, Williamson GJ, Jordan GJ, *Bowman DMJS School of Plant Science, Private Bag 55, University of Tasmania, Hobart, Tas. 7001, Australia *Correspondence: David MJS Bowman, School of Plant Science, Private Bag 55, University of Tasmania, Hobart, Tas. 7001, Australia. E-mail: [email protected] Contents Summary I. Introduction II. Giant eucalypts – definition, distribution and taxonomic variation III. Giant eucalypts in a global context IV. Functional ecology of giant eucalypts V. Are giant eucalypts rain forest trees? VI. Conclusions Acknowledgements References 1 IVG Forest Conservation Report 5B: Giant Eucalypt Forests 2 IVG Forest Conservation Report 5B: Giant Eucalypt Forests Summary Tree species exceeding 70m in height are rare globally. Giant gymnosperms are concentrated near the Pacific coast of the USA, but the tallest angiosperms are eucalypts in eastern Australia. In eucalypts, probable drivers of gigantism are intense intra-specific competition following severe fires, and inter-specific competition amongst adult trees. Giant eucalypts co-exist with rain forest trees in eastern Australia, but occur where rain forest is now extinct in SW Western Australia. Given ideal growth conditions, the local abundance of giant eucalypts is controlled by interactions between fire activity and landscape setting. Giant eucalypts have features that increase fire risk (eg. oil-rich foliage and open crowns, etc.) relative to other rain forest trees but debate remains whether these features are adaptations or exaptations.
    [Show full text]
  • Oldest Known Eucalyptus Macrofossils Are from South America
    CORE Metadata, citation and similar papers at core.ac.uk Provided by PubMed Central Oldest Known Eucalyptus Macrofossils Are from South America Marı´a A. Gandolfo1*., Elizabeth J. Hermsen1.,Marı´a C. Zamaloa2, Kevin C. Nixon1, Cynthia C. Gonza´lez3, Peter Wilf4, N. Rube´nCu´ neo3, Kirk R. Johnson5 1 L.H. Bailey Hortorium, Department of Plant Biology, Cornell University, Ithaca, New York, United States of America, 2 Departamento de Ecologı´a, Gene´tica y Evolucio´n, Universidad de Buenos Aires, Capital Federal, Buenos Aires, Argentina, 3 Museo Paleontolo´gico Egidio Feruglio-Consejo Nacional de Investigaciones Cientı´ficas y Te´cnicas, Trelew, Chubut, Argentina, 4 Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania, United States of America, 5 Denver Museum of Nature and Science, Denver, Colorado, United States of America Abstract The evolutionary history of Eucalyptus and the eucalypts, the larger clade of seven genera including Eucalyptus that today have a natural distribution almost exclusively in Australasia, is poorly documented from the fossil record. Little physical evidence exists bearing on the ancient geographical distributions or morphologies of plants within the clade. Herein, we introduce fossil material of Eucalyptus from the early Eocene (ca. 51.9 Ma) Laguna del Hunco paleoflora of Chubut Province, Argentina; specimens include multiple leaves, infructescences, and dispersed capsules, several flower buds, and a single flower. Morphological similarities that relate the fossils to extant eucalypts include leaf shape, venation, and epidermal oil glands; infructescence structure; valvate capsulate fruits; and operculate flower buds. The presence of a staminophore scar on the fruits links them to Eucalyptus, and the presence of a transverse scar on the flower buds indicates a relationship to Eucalyptus subgenus Symphyomyrtus.
    [Show full text]
  • Epicormic Buds in Trees: a Review of Bud Establishment, Development and Dormancy Release
    Tree Physiology 32, 565–584 doi:10.1093/treephys/tps040 Tree Physiology review Epicormic buds in trees: a review of bud establishment, development and dormancy release Andrew R. Meier1, Michael R. Saunders1,3 and Charles H. Michler2 1Hardwood Tree Improvement and Regeneration Center, Department of Forestry and Natural Resources, Purdue University, 715 State Street, West Lafayette, IN 47907-2061, USA; 2USDA Forest Service, Northern Research Station, Hardwood Tree Improvement and Regeneration Center, 715 State Street, West Lafayette, IN 47907-2061, USA; 3Corresponding author ([email protected]) Received December 6, 2011; accepted March 22, 2012; published online May 3, 2012; handling Editor Douglas Sprugel The formation of epicormic sprouts on the boles of trees is a phenomenon that has, until recently, been poorly understood. Renewed interest in the topic in the last two decades has led to significant advances in our knowledge of the subject, espe- cially in regard to bud anatomy, morphology and ontogeny. There exists, however, no comprehensive synthesis of results from different disciplines across genera and geographical areas; this review seeks to fill that void and provide a comprehen- sive framework capable of guiding future research. A tree’s potential for producing epicormic branches is dependent on the number of buds that are produced on a growing shoot, the development of those buds and associated meristems over time and the factors that promote sprout formation or bud death. Based on the descriptions of a limited number of researched species, we were able to describe four different developmental strategies for epicormics based on characteristics of meri- stem development. Control over epicormic bud dormancy is complex, but it is clear that the traditional view of auxin- mediated dormancy release is incomplete.
    [Show full text]
  • A Dated Molecular Perspective of Eucalypt Taxonomy, Evolution and Diversification
    AUTHORS’ PAGE PROOFS: NOT FOR CIRCULATION CSIRO PUBLISHING Australian Systematic Botany https://doi.org/10.1071/SB18015 A dated molecular perspective of eucalypt taxonomy, evolution and diversification Andrew H. Thornhill A,B,C,H, Michael D. Crisp D, Carsten Külheim D,E, Kristy E. Lam A, Leigh A. NelsonF, David K. YeatesF and Joseph T. Miller A,G ACentre for Australian National Biodiversity Research, National Research Collections, Black Mountain, CSIRO, Canberra, ACT 2601, Australia. BAustralian Tropical Herbarium, James Cook University, Cairns, Qld 4870, Australia. CUniversity and Jepson Herbaria, and Department of Integrative Biology, University of California, Berkeley, CA 94720-2465, USA. DDivision of Evolution and Ecology, Research School of Biology, Australian National University, Canberra, ACT 2601, Australia. ESchool of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI 49931, USA. FAustralian National Insect Collection and Taxonomic Research and Information Network, National Research Collections, Black Mountain, CSIRO, ACT 2601, Australia. GOffice of International Science and Engineering, National Science Foundation, Alexandria, VA 22314, USA. HCorresponding author. Email: [email protected] Abstract. The eucalypts, which include Eucalyptus, Angophora and Corymbia, are native to Australia and Malesia and include over 800 named species in a mixture of diverse and depauperate lineages. We assessed the fit of the eucalypt taxonomic classification to a phylogeny of 711 species scored for DNA sequences of plastid matK and psbA–trnH, as well as nuclear internal transcribed spacer and external transcribed spacer. Two broadly similar topologies emerge from both 5 maximum likelihood and Bayesian analyses, showing Angophora nested within Corymbia or Angophora, sister to Corymbia. The position of certain species-poor groups on long branches fluctuated relative to the three major Eucalyptus subgenera, and positions of several closely related species within those subgenera were unstable and lacked statistical support.
    [Show full text]