Guam & Rota 2007
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Steryl Glucoside Concentration Declines with Cycas Micronesica Seed Age
CSIRO PUBLISHING www.publish.csiro.au/journals/fpb Functional Plant Biology, 2006, 33, 857–862 Steryl glucoside concentration declines with Cycas micronesica seed age Thomas E. MarlerA,C, Vivian LeeB, J. ChungB and Christopher A. ShawB ACNAS-AES, University of Guam, UOG Station, Mangilao, GU 96923, USA. BDepartment of Ophthalmology, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4. CCorresponding author. Email: [email protected] Abstract. Neurotoxins contained in the seeds of Cycas micronesica K.D. Hill have been implicated in the Guam neurological disease cluster, amyotrophic lateral sclerosis–parkinsonism dementia complex (ALS–PDC). Some of these neurotoxins remain in the washed cycad seed flour that was historically an important part of the Chamorro diet. Of these, variant steryl glucosides have been identified by us as a possible etiological factor in the disease. In vitro and in vivo animal studies have strongly supported a role for these molecules in some forms of neurodegeneration. As part of a series of studies, we have now determined the concentrations of several steryl glucosides and their sterol precursors as affected by the age of C. micronesica seeds. The concentration of these molecules declined with seed age from 2.0 to 30.5 months. Following log-transformation of both axes, the decline was linear. Similarly, concentration of all but one of the molecules declined with age when samples were restricted to gametophyte tissue. Factors suspected of influencing phenotypic plasticity must be addressed when interpreting plant physiology data. Our results confirm for the first time that tissue age must be documented and reported in cycad seed biochemistry studies to remove ambiguities from results. -
Cycad Aulacaspis Scale
Invasive Insects: Risks and Pathways Project CYCAD AULACASPIS SCALE UPDATED: APRIL 2020 Invasive insects are a huge biosecurity challenge. We profile some of the most harmful insect invaders overseas to show why we must keep them out of Australia. Species Cycad aulacaspis scale / Aulacaspis yasumatsui. Also known as Asian cycad scale. Main impacts Decimates wild cycad populations, kills cultivated cycads. Native range Thailand. Invasive range China, Taiwan, Singapore, Indonesia, Guam, United States, Caribbean Islands, Mexico, France, Ivory Coast1,2. Detected in New Zealand in 2004, but eradicated.2 Main pathways of global spread As a contaminant of traded nursery material (cycads and cycad foliage).3 WHAT TO LOOK OUT FOR The adult female cycad aulacaspis scale has a white cover (scale), 1.2–1.6 mm long, ENVIRONMENTAL variable in shape and sometimes translucent enough to see the orange insect with its IMPACTS OVERSEAS orange eggs beneath. The scale of the male is white and elongate, 0.5–0.6 mm long. Photo: Jeffrey W. Lotz, Florida Department of Agriculture and Consumer Services, The cycad aulacaspis scale has decimated Bugwood.org | CC BY 3.0 cycads on Guam since it appeared there in 2003. The affected species, Cycas micronesica, was once the most common cause cycad extinctions around the world, Taiwan, 100,000 cycads were destroyed tree on Guam, but was listed by the IUCN 7 including in India10 and Indonesia11. The by an outbreak of the scale . It is difficult as endangered in 2006 following attacks continuous removal of plant sap by the to control in cultivation because of high by three insect pests, of which this scale scale depletes cycads of carbohydrates4,9. -
Report and Recommendations on Cycad Aulacaspis Scale, Aulacaspis Yasumatsui Takagi (Hemiptera: Diaspididae)
IUCN/SSC Cycad Specialist Group – Subgroup on Invasive Pests Report and Recommendations on Cycad Aulacaspis Scale, Aulacaspis yasumatsui Takagi (Hemiptera: Diaspididae) 18 September 2005 Subgroup Members (Affiliated Institution & Location) • William Tang, Subgroup Leader (USDA-APHIS-PPQ, Miami, FL, USA) • Dr. John Donaldson, CSG Chair (South African National Biodiversity Institute & Kirstenbosch National Botanical Garden, Cape Town, South Africa) • Jody Haynes (Montgomery Botanical Center, Miami, FL, USA)1 • Dr. Irene Terry (Department of Biology, University of Utah, Salt Lake City, UT, USA) Consultants • Dr. Anne Brooke (Guam National Wildlife Refuge, Dededo, Guam) • Michael Davenport (Fairchild Tropical Botanic Garden, Miami, FL, USA) • Dr. Thomas Marler (College of Natural & Applied Sciences - AES, University of Guam, Mangilao, Guam) • Christine Wiese (Montgomery Botanical Center, Miami, FL, USA) Introduction The IUCN/SSC Cycad Specialist Group – Subgroup on Invasive Pests was formed in June 2005 to address the emerging threat to wild cycad populations from the artificial spread of insect pests and pathogens of cycads. Recently, an aggressive pest on cycads, the cycad aulacaspis scale (CAS)— Aulacaspis yasumatsui Takagi (Hemiptera: Diaspididae)—has spread through human activity and commerce to the point where two species of cycads face imminent extinction in the wild. Given its mission of cycad conservation, we believe the CSG should clearly focus its attention on mitigating the impact of CAS on wild cycad populations and cultivated cycad collections of conservation importance (e.g., Montgomery Botanical Center). The control of CAS in home gardens, commercial nurseries, and city landscapes is outside the scope of this report and is a topic covered in various online resources (see www.montgomerybotanical.org/Pages/CASlinks.htm). -
1 REQUEST for STATEMENTS of INTEREST N40192-21-2-8003 PROJECT to BE INITIATED in FISCAL YEAR 2021 Project Title: CYCAD MONITORIN
REQUEST FOR STATEMENTS OF INTEREST N40192-21-2-8003 PROJECT TO BE INITIATED IN FISCAL YEAR 2021 Project Title: CYCAD MONITORING AT ANDERSEN AIR FORCE BASE (AAFB) AND TINIAN MILITARY LEASE AREA (MLA) Responses to this Request for Statements of Interest will be used to identify potential projects to be funded by the Department of the Navy (DoN) in support of monitoring the Cycas micronesica plants currently at Andersen Air Force Base (AAFB), Guam and the Tinian Military Lease Area (MLA). Approximately $219,491 is expected to be available to support this program (contingent upon availability of funds). The Department of Navy’s obligation to pay or reimburse any costs hereunder is subject to the availability of appropriated funds and limited by funds obligated and nothing in this Agreement will be interpreted to require obligations or payments by the Federal Government in violation of the Anti-Deficiency Act, 31 U.S.C. §1341. Thus, funds have not yet been appropriated for this project and there is considerable uncertainty regarding the level of available funding for FY2021. Background Fadang or Micronesian cycad (Cycas micronesica), an endemic plant found on the islands of Guam and Rota, was the dominant plant and the most abundant ‘tree’ in Guam’s forests in 2000. The invasion of the cycad scale Aulacaspis yasumatsui in 2003 and the butterfly Luthrodes pandava (formerly known as Chilades pandava) in 2005 initiated an epidemic mortality of plant populations such that C. micronesica was Red- listed by the IUCN as endangered in 2006 and listed as threatened under the U.S. -
Rhyzobius Lophanthae Introduced Against Asian
ABSTRACT Too Little and Too Late???? Asian Cycad Scale (ACS) Chronology Asian cycad scale (ACS), Aulacaspis yasumatsui, was 1972 – Aulacaspis yasumatsui described in Thailand first detected in Tumon, Guam in December 2003 in front Rhyzobius lophanthae introduced against Asian 1996 – ACS detected in Florida of a hotel where Cycas revoluta, an introduced ornamental 1998 – ACS detected in Hawaii cycad and Cycas micronesica, an indigenous cycad were cycad scale, Aulacaspis yasumatsui, on Guam 2003 – ACS detected on cycads used for landscaping in Guam’s planted. The scale is believed to have been imported from Tumon Bay hotel district Hawaii in 1998 on ornamental cycads. The scale currently R.H. Miller1, A. Moore1, R.N. Muniappan1, A.P. Brooke2 and T.E. Marler1. 2004 – ACS spreads to Cycas revoluta and C. micronesica infests introduced and indigenous cycads on about two 1CNAS-AES, University of Guam, Mangilao, Guam (fadang) throughout Guam thirds of Guam’s 354 square kilometers. Severe 2Guam National Wildlife Refuge, Dededo, Guam 2005 – Ryzobius lophanthae and Coccobius fulvus released on infestations have been observed to kill both species within Guam; Plans made to preserve C. micronesica germplasm from a few months. We fear that C. micronesica may be Guam on the nearby island of Tinian threatened with extinction should the scale spread to the few other Micronesian islands that harbor it. Rhyzobius lophanthae, a coccinellid introduced to Asian Cycad Scale Management Hawaii in 1894 for other scale insects, was imported from Biological Control Agents on Guam Maui to Guam in November 2004 and released on C. Rhyzobius lophanthae micronesica at the Guam National Wildlife Refuge at • Introduced in Hawaii in 1894; Guam ??? 1930s Ritidian point in February 2005. -
Elemental Profiles in Cycas Micronesica Stems
plants Article Elemental Profiles in Cycas micronesica Stems Thomas E. Marler College of Natural and Applied Sciences, University of Guam, UOG Station, Mangilao, Guam 96923, USA; [email protected]; Tel.: +1-671-735-2100 Received: 24 August 2018; Accepted: 30 October 2018; Published: 1 November 2018 Abstract: Essential nutrients and metals have been quantified in stems of many tree species to understand the role of stems as storage and source organs. Little is known about stored stem resources of cycad tree species. Cycas micronesica tissue was collected from apical and basal axial regions of stems; and pith, vascular, and cortex tissues were separated into three radial regions. Leaves were also sampled to provide a comparison to stems. Minerals and metals were quantified in all tissues. Minerals and metals varied greatly among the six stem sections. Phosphorus varied more among the three radial sections than the other macronutrients, and zinc and nickel varied more than the other micronutrients. Stem carbon was less than and stem calcium was greater than expected, based on what is currently known tree stem concentrations in the literature. Elemental concentrations were generally greater than those previously reported for coniferous gymnosperm trees. Moreover, the stem concentrations were high in relation to leaf concentrations, when compared to published angiosperm and conifer data. The results indicated that the addition of more cycad species to the literature will improve our understanding of gymnosperm versus angiosperm stem nutrient relations, and that the non-woody cycad stem contains copious essential plant nutrients that can be mobilized and deployed to sinks when needed. -
Cycad Aulacaspis Scale
CycadCycad AulacaspisAulacaspis ScaleScale InvasiveInvasive PestPest withwith ExtinctionExtinction Potential!Potential! Photo: Anne Brooke, Guam National Wildlife Refuge Jody Haynes Montgomery Botanical Center, 11901 Old Cutler Road, Miami, FL 33156 USA [email protected] GeneralGeneral CycadCycad InformationInformation OrderOrder:: CycadalesCycadales FamiliesFamilies:: BoweniaceaeBoweniaceae,, Cycadaceae,Cycadaceae, Stangeriaceae,Stangeriaceae, ZamiaceaeZamiaceae ExtantExtant speciesspecies:: 302302 currentlycurrently recognizedrecognized Photo: Dennis Stevenson DistributionDistribution:: PantropicalPantropical ConservationConservation statusstatus:: CycadsCycads representrepresent oneone ofof thethe mostmost threatenedthreatened plantplant groupsgroups worldwide;worldwide; >50%>50% listedlisted asas threatenedthreatened oror endangeredendangered Photo: Tom Broome Photo: Mark Bonta AulacaspisAulacaspis yasumatsuiyasumatsui TakagiTakagi OrderOrder:: Hemiptera/HomopteraHemiptera/Homoptera FamilyFamily:: DiaspididaeDiaspididae CommonCommon namesnames:: OfficialOfficial cycadcycad aulacaspisaulacaspis scalescale (CAS)(CAS) OtherOther AsianAsian cycadcycad scale,scale, ThaiThai scale,scale, snowsnow scalescale NativeNative distributiondistribution:: AndamanAndaman IslandsIslands toto Vietnam,Vietnam, W. Tang, USDA-APHIS-PPQ includingincluding ThailandThailand andand probablyprobably Cambodia,Cambodia, Laos,Laos, peninsularpeninsular Malaysia,Malaysia, Myanmar,Myanmar, southernmostsouthernmost China,China, andand possiblypossibly -
Chemical Composition of the Resin Essential Oil from Agathis
American Journal of Essential Oils and Natural Products 2016; 4(4): 04-05 ISSN: 2321 9114 AJEONP 2016; 4(4): 04-05 Chemical composition of the resin essential oil from © 2016 AkiNik Publications Received: 02-08-2016 Agathis atropurpurea from North Queensland, Accepted: 03-09-2016 Australia Matthew S Garrison Department of Chemistry, University of Alabama in Matthew S Garrison, Anthony K Irvine and William N Setzer Huntsville, Huntsville, AL, USA Anthony K Irvine Abstract CSIRO Tropical Forest Research The volatile materials from the resin of Agathis atropurpurea were obtained by hydrodistillation and Centre, Atherton, Queensland, analyzed by gas chromatography–mass spectrometry. A total of 17 compounds were identified in the Australia distilled oils accounting for 98.1-99.6% of the compositions. The oils were dominated by limonene (89.8- 97.4%) and were devoid of diterpenoids. William N Setzer Department of Chemistry, Keywords: Essential oil composition, Agathis atropurpurea, Araucariaceae, limonene University of Alabama in Huntsville, Huntsville, AL, USA 1. Introduction The genus Agathis (Araucariaceae) is made up of a least 13 species found in Malesia, Australia, New Zealand and the South Pacific islands [1,2]. Agathis atropurpurea B. Hyland (Queensland kauri pine) is endemic to northeast Queensland, and is found in mountain rainforest ranging from around 16º25ʹS south to around 17º23ʹS, at an altitudinal range of 750- [2] 1500 m . The resin from A. atropurpurea oozes profusely from wounds on the tree trunk and is used by Australian Aborigines to start fires. In this work, we present the composition of the volatiles obtained by hydrodistillation of the resin from A. -
Global Variation in the Thermal Tolerances of Plants
Global variation in the thermal tolerances of plants Lesley T. Lancaster1* and Aelys M. Humphreys2,3 Proceedings of the National Academy of Sciences, USA (2020) 1 School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom. ORCID: http://orcid.org/0000-0002-3135-4835 2Department of Ecology, Environment and Plant Sciences, Stockholm University, 10691 Stockholm, Sweden. 3Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden. ORCID: https://orcid.org/0000-0002-2515-6509 * Corresponding author: [email protected] Significance Statement Knowledge of how thermal tolerances are distributed across major clades and biogeographic regions is important for understanding biome formation and climate change responses. However, most research has concentrated on animals, and we lack equivalent knowledge for other organisms. Here we compile global data on heat and cold tolerances of plants, showing that many, but not all, broad-scale patterns known from animals are also true for plants. Importantly, failing to account simultaneously for influences of local environments, and evolutionary and biogeographic histories, can mislead conclusions about underlying drivers. Our study unravels how and why plant cold and heat tolerances vary globally, and highlights that all plants, particularly at mid-to-high latitudes and in their non-hardened state, are vulnerable to ongoing climate change. Abstract Thermal macrophysiology is an established research field that has led to well-described patterns in the global structuring of climate adaptation and risk. However, since it was developed primarily in animals we lack information on how general these patterns are across organisms. This is alarming if we are to understand how thermal tolerances are distributed globally, improve predictions of climate change, and mitigate effects. -
The Evolution of Cavitation Resistance in Conifers Maximilian Larter
The evolution of cavitation resistance in conifers Maximilian Larter To cite this version: Maximilian Larter. The evolution of cavitation resistance in conifers. Bioclimatology. Univer- sit´ede Bordeaux, 2016. English. <NNT : 2016BORD0103>. <tel-01375936> HAL Id: tel-01375936 https://tel.archives-ouvertes.fr/tel-01375936 Submitted on 3 Oct 2016 HAL is a multi-disciplinary open access L'archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destin´eeau d´ep^otet `ala diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publi´esou non, lished or not. The documents may come from ´emanant des ´etablissements d'enseignement et de teaching and research institutions in France or recherche fran¸caisou ´etrangers,des laboratoires abroad, or from public or private research centers. publics ou priv´es. THESE Pour obtenir le grade de DOCTEUR DE L’UNIVERSITE DE BORDEAUX Spécialité : Ecologie évolutive, fonctionnelle et des communautés Ecole doctorale: Sciences et Environnements Evolution de la résistance à la cavitation chez les conifères The evolution of cavitation resistance in conifers Maximilian LARTER Directeur : Sylvain DELZON (DR INRA) Co-Directeur : Jean-Christophe DOMEC (Professeur, BSA) Soutenue le 22/07/2016 Devant le jury composé de : Rapporteurs : Mme Amy ZANNE, Prof., George Washington University Mr Jordi MARTINEZ VILALTA, Prof., Universitat Autonoma de Barcelona Examinateurs : Mme Lisa WINGATE, CR INRA, UMR ISPA, Bordeaux Mr Jérôme CHAVE, DR CNRS, UMR EDB, Toulouse i ii Abstract Title: The evolution of cavitation resistance in conifers Abstract Forests worldwide are at increased risk of widespread mortality due to intense drought under current and future climate change. -
Final Report Prepared by WWF-Australia, Sydney NSW Cover Image: © Stephanie Todd / JCU / WWF-Aus a WWF-Australia Production
1 Contents .............................................................................................. 2 Executive Summary ............................................................................ 4 Introduction ...................................................................................... 12 Objective 1. Estimate the current population status, distribution and habitat use of the northern bettong ................................................... 16 a) Population Status .................................................................................................................. 16 b) Population distribution ........................................................................................................ 24 c) Non-invasive conservation genetics ...................................................................................... 37 Objective 2. Assess the significance of the northern bettong's role in ecosystem function ........................................................................... 44 Objective 3. Develop appropriate fire management regimes for the northern bettong ............................................................................... 47 Key points ........................................................................................ 50 Discussion ......................................................................................... 52 Recommendations ............................................................................ 57 Publications ..................................................................................... -
Biotic Threats to Cycas Micronesica Continue to Expand to Complicate Conservation Decisions
insects Communication Biotic Threats to Cycas micronesica Continue to Expand to Complicate Conservation Decisions Benjamin E. Deloso 1 , L. Irene Terry 2, Lee S. Yudin 1 and Thomas E. Marler 1,* 1 College of Natural and Applied Sciences, University of Guam, Mangilao, GU 96923, USA; [email protected] (B.E.D.); [email protected] (L.S.Y.) 2 School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA; [email protected] * Correspondence: [email protected] Received: 7 November 2020; Accepted: 7 December 2020; Published: 16 December 2020 Simple Summary: Effective conservation of endangered plant species requires identifying their greatest threats to formulate management protocols. Invasive species are a result of global change and are a major threat to biodiversity. We used the island cycad Cycas micronesica K.D. Hill as a model that represents the global issues of conservation science and invasion biology. In Guam, several non-native insect invasions began in 2003 and have combined to threaten the island population of this cycad species. In this article, we summarize the history of reported invasions and the reported non-native insect herbivores that have recently increased the threat status. We also discuss the interactions among herbivores that threaten the sustainability of C. micronesica on the island of Guam. Abstract: Invasions of non-native species can threaten native biodiversity, and island ecosystems are ideal for studying these phenomena. In this article, first, we report on the invasive species that combine to threaten the island cycad Cycas micronesica by reviewing the history of previously reported invasions and providing an update of recent invasions.