SCIENCE Biodiversityand SUSTAINABLE FORESTRY

Total Page:16

File Type:pdf, Size:1020Kb

SCIENCE Biodiversityand SUSTAINABLE FORESTRY SCIENCE BIODIVERSITYand SUSTAINABLE FORESTRY A FINDINGS REPORT OF THE National Commission on Science for Sustainable Forestry A Program Conducted by the National Council for Science and the Environment Improving the scientific basis for environmental decisionmaking NCSE The mission of the National Commission on Science for Sustainable Forestry (NCSSF or Commission) is to improve the NCSSF operates under the scientific basis for developing, implementing, and evaluating sustainable auspices of the National forestry in the United States. Council for Science and The Commission is an independent, non-advocacy, multi-stakeholder the Environment (NCSE), body that plans and oversees the NCSSF program. It includes 16 leading a non-advocacy, not-for-profit scientists and forest management professionals from government, indus- organization dedicated to improving the scientific basis try, academia, and environmental organizations—all respected opinion for environmental decision leaders in diverse fields with broad perspectives. Members serve as making. individuals rather than as official representatives of their organizations. The Commission convenes at least twice a year to plan and oversee NCSE promotes interdiscipli- the program. Members’ names and affiliations are listed on page 2. nary research that connects The primary goal of the NCSSF program is to build a better scientific the life, physical, and social underpinning for assessing and improving sustainable forest management sciences and engineering. practices. The program strives to produce information and tools of the highest technical quality and greatest relevancy to improving forest Communication and outreach policy, management, and practice. are integral components of The initial five-year phase of the program focuses on the relationship these collaborative research between biodiversity and sustainable forest management. The program efforts that link scientific results to the needs of addresses information needs for managed forestlands, both industrial and decision makers. non-industrial, in the continental United States. Syntheses and surveys, research and assessments, tool development, and communication and outreach activities all contribute to the program’s goals. The Commission does not promote specific policy positions, promul- gate management practices, or endorse any particular sustainable forest management certification systems. However, the results of the NCSSF program provide a stronger scientific basis for evaluating forest practices and certification systems, comparing them more objectively, effectively assessing their progress, and developing more innovative approaches to forest management. Applications of the Commission’s work include: • informing forest management decisions, conservation plans, and governmental and private sector policies • providing a sound ecological framework for long term economic management of forests • refining and evaluating certification systems such as the Forest Stewardship Council (FSC), American Tree Farm System (ATFS), Green Tag, and Sustainable Forestry Initiative (SFI). More information on the NCSSF program and results of specific projects are available on our web site at: www.ncssf.org. Sponsors of the National Commission on Science for Sustainable Forestry SCIENCE BIODIVERSITYand SUSTAINABLE FORESTRY A FINDINGS REPORT OF THE National Commission on Science for Sustainable Forestry Washington, DC January 4, 2005 A Program Conducted by the National Council for Science and the Environment Improving the scientific basis for environmental decisionmaking When citing this report, please use the following reference: NCSSF, 2005. Science, Biodiversity, and Sustainable Forestry: A Findings Report of the National Commission on Science for Sustainable Forestry (NCSSF), Washington, DC. COMMISSION MEMBERSHIP—2004 Hal Salwasser, PhD, Commission Chairman (2003-2005) V. Alaric Sample, PhD Dean, College of Forestry President Oregon State University Pinchot Institute for Conservation Greg Aplet, PhD To m Thompson Senior Forest Scientist Deputy Chief, National Forest System The Wilderness Society USDA Forest Service Ann Bartuska, PhD Scott Wallinger Deputy Chief, Research & Development Senior Vice President (Retired) USDA Forest Service Mead Westvaco, Forest Science Laboratory Joyce Berry, PhD Dean, College of Natural Resources J. Christopher Bernabo, PhD Colorado State University Director, NCSSF Program James Brown National Council for Science and the Environment Natural Resources Policy Director, Retired Aaron Lien Oregon Governor’s Office Program Coordinator, NCSSF Bruce J. Cabarle, PhD National Council for Science and the Environment Director, Global Forestry Programs World Wildlife Federation Former Commission Members Norm L. Christensen, PhD (chair 2002-2003) Charles H. Collins Professor of Ecology Managing Director Nicholas School of the Environment, Duke University The Forestland Group, LLC. Nils Christoffersen 2001-2002 Deputy Director Wallace Covington, PhD Wallowa Resources Regents Professor of Forest Ecology John C. Gordon, PhD (chair 2001-2002) Northern Arizona University Pinchot Professor of Forestry (Emeritus) 2001-2003 Yale School of Forestry and Environmental Studies Phil Janik Sharon Haines, PhD Chief Operating Officer (Retired) Manager of Sustainable Forestry USDA Forest Service International Paper 2001-2002 Alan A. Lucier, PhD Mark Schaefer, PhD Senior Vice President President and CEO National Council for Air and Stream Improvement NatureServe 2001-2003 David Perry, PhD Professor (Emeritus) Mark Schaffer, PhD Oregon State University Program Officer for the Environment Doris Duke Charitable Foundation H. Ronald Pulliam, PhD (Formerly Defenders of Wildlife) Regents Professor of Ecology 2001-2003 University of Georgia 2 Science, Biodiversity, and Sustainable Forestry CONTENTS OVERVIEW. 4 1 INTRODUCTION. 6 The Commission’s Role. 6 The NCSSF Program . 8 Report Purpose and Organization . 8 Defining Terms Used in the Report. 9 2 CONTEXT . 10 Advancing Science for Sustainable Forestry . 10 Forests in Context . 11 The Forest Continuum . 12 Changing Forest Ownerships . 13 Forestry and Sustainability . 13 Biodiversity Indicators . 14 3 FINDINGS AND IMPLICATIONS. 15 Area 1: The effectiveness of biodiversity conservation is largely determined by interactions between stand- and landscape-level patterns.. 16 Implications of Area 1 Findings for Sustainable Forestry. 20 Area 2: Sustaining disturbance dynamics within appropriate ranges sustains biodiversity and ecosystem services. 21 Implications of Area 2 Findings for Sustainable Forestry. 26 Area 3: Biodiversity indicators must be matched to land-use objectives. 28 Implications of Area 3 Findings for Sustainable Forestry. 32 Area 4: Sustainable forestry and biodiversity conservation require management that recognizes and adapts to new information, changing environments, and shifting social priorities . 34 Implications of Area 4 Findings for Sustainable Forestry. 40 4 WORK IN PROGRESS . 42 Adaptive Management of NCSSF . 42 Next Steps. 43 APPENDIX . 46 Table A-I: NCSSF Project Information (Codes as referred to in report) . 46 Table A-II: NCSSF Phase 1 Program Timeline . 49 REFERENCES . 50 Acknowledgments . 52 A Findings Report of the National Commission on Science for Sustainable Forestry (NCSSF) 3 OVERVIEW The National Commission on and information, (2) polarization Area 1: The effectiveness of Science for Sustainable Forestry within the field, (3) misperceptions biodiversity conservation is largely (NCSSF or Commission) includes and lack of public awareness, and determined by interactions leading scientists and forest man- (4) lack of financial resources. The between stand- and landscape- agement professionals from gov- NCSSF program addresses the level patterns. ernment, industry, academia, and first three of these, which com- • Finding 1A. Biodiversity environmental organizations who prise more than three-fourths conservation requires knowl- collaboratively plan and oversee of the users’ identified barriers. edge and policies that cross the NCSSF program. This inde- The Commission has synthe- landscape levels. pendent, multi-stakeholder char- sized existing information into • Finding 1B. Stand-level acter enables the Commission to useable knowledge, sponsored diversity is heavily influenced serve as an “honest broker” who projects to fill key research gaps, by disturbance legacies. can address controversial issues developed tools for practical • Finding 1C. Biodiversity more objectively. The applications, and reached agree- correlates to spatial variability Commission has completed about ment on important issues related in forest management. half of its initial five-year program to biodiversity and sustainable • Finding 1D. Forest fragments to advance the science and practice forestry. The findings presented support reduced levels of of biodiversity conservation in here are based on the results of biodiversity. sustainable forestry. NCSSF-funded projects, the The Commission has found Commissioners’ expertise, and Implications: Landscape-level infor- that appropriate forest policies three years of dialogue among mation is necessary to the full use and practices can be beneficial to themselves, as well as discussions of science in conservation efforts biodiversity. While gaps in knowl- with a wide range of experts and everywhere. The problem with edge remain, the Commission’s stakeholders. The NCSSF find- a top-down, “how should the findings will help forestry practi- ings are an especially
Recommended publications
  • Recovery Plan for Scots Pine Blister Rust Caused by Cronartium Flaccidum
    Recovery Plan for Scots Pine Blister Rust caused by Cronartium flaccidum (Alb. & Schwein.) G. Winter and Peridermium pini (Pers.) Lév. [syn. C. asclepiadeum (Willd.) Fr., Endocronartium pini (Pers.) Y. Hiratsuka] March 12 2009 Contents page –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Executive Summary 2 Contributors and Reviewers 4 I. Introduction 4 II. Symptoms 5 III. Spread 6 IV. Monitoring and Detection 7 V. Response 8 VI. USDA Pathogens Permits 9 VII. Economic Impact and Compensation 10 VIII. Mitigation and Disease Management 11 IX. Infrastructure and Experts 14 X. Research, Extension, and Education Priorities 15 References 17 Web Resources 20 Appendix 21 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– This recovery plan is one of several disease-specific documents produced as part of the National Plant Disease Recovery System (NPDRS) called for in Homeland Security Presidential Directive Number 9 (HSPD-9). The purpose of the NPDRS is to insure that the tools, infrastructure, communication networks, and capacity required for mitigating impacts of high-consequence, plant-disease outbreaks are in place so that a reasonable level of crop production is maintained. Each disease-specific plan is intended to provide a brief primer on the disease, assess the status of critical recovery components, and identify disease management research, extension, and education needs. These documents are not intended to be stand-alone documents that address all of the many and varied aspects of plant disease outbreak and all of the decisions that must be made and actions taken to achieve effective response and recovery. They are, however, documents that will help USDA guide further efforts directed toward plant disease recovery. 1 Executive Summary Scots pine blister rust (caused by the fungi Cronartium flaccidum and Peridermium pini) infects many Eurasian pines including Pinus sylvestris (Scots pine), Pinus pinaster, P.
    [Show full text]
  • First Report of the White Pine Blister Rust Fungus, Cronartium Ribicola, On
    Alternaria was isolated from the lesions. The pathogen was isolated on potato dextrose agar (PDA) media. On PDA. the fungus grew slowly with colonies reaching approximately 35 to 40 mm in diameter in 7 days when incubated at 30°C. Conidiophores arose singly or in groups, straight or First Report of the White Pine Blister Rust Fungus, Cronartium flexous. cylindrical, septate, pale to olivaceous brown, as much as 155 pm ribicola, on Pedicularis bracteosa. P. J. Zambino, B. A. Richardson, and long, 4 to 5.5 pm thick; conidia were straight, obclavate, pale olivaceous G. I. McDonald. USDA Forest Service, Rocky Mountain Research Station, brown, smooth, with up to 15 transverse and rarely 1 or 2 longitudinal or Moscow. ID 83843. Plant Dis. 91:467, 2007; published online as oblique septa and measured 50 to 115 x 5 to 10 pm. Pathogenicity tests doi:10.1094/PDIS-91-4-0467A.Accepted for publication 26 December were carried out three times on 6-month-old plants (n = 10). Plants were 2006. sprayed with a conidial suspension of lo5 conidialml; control plants were sprayed with sterilized water. Plants were covered with polyethylene bags Until recently, Cronarrium ribicola J.C. Fisch. was thought to utilize for 10 days. Disease symptoms appeared after 12 i- 1 day after inoculation. only Ribes spp. (Grossulariaceae) as telial hosts in North America. During Symptoms on the leaves were similar to those of a naturally occurring 2004, Pedicularis racemosa Dougl. ex Benth. and Casrilleja miniata diseased plant. The fungal pathogen was consistently reisolated from Dougl. (Orobanchaceae) were proven as natural telial hosts at a subalpine inoculated plants.
    [Show full text]
  • Data Sheet on Cronartium Coleosporioides
    EPPO quarantine pest Prepared by CABI and EPPO for the EU under Contract 90/399003 Data Sheets on Quarantine Pests Cronartium coleosporioides IDENTITY Name: Cronartium coleosporioides J.C. Arthur Anamorph: Peridermium stalactiforme (Dietel) J.C. Arthur & Kern Taxonomic position: Fungi: Basidiomycetes: Uredinales Common names: Stalactiform blister rust (English) Notes on taxonomy and nomenclature: A broader concept of C. coleosporioides has been followed in the past, by which it is considered to include a set of distinctive aecial stages: Peridermium stalactiforme (northern distribution), P. filamentosum (southern distribution) and P. harknessii (ubiquitous and autoecious) (Mordue & Gibson, 1978). However, Hiratsuka (1969) concluded that the aeciospores of P. harknessii function as teliospores and erected the new genus Endocronartium to accommodate such endocyclic life cycles (see Endocronartium harknessii; EPPO/CABI, 1996c). This approach is followed here, so the aecial stage of C. coleosporioides is considered to be only P. stalactiforme. In other respects, it may be noted that C. coleosporioides belongs, with C. comandrae and C. comptoniae, to the group of the "blister rusts", heteroecious rusts with P. banksiana and P. contorta as main aecial hosts and wild indigenous herbaceous plants as telial hosts. Bayer computer code: CRONCL EPPO A1 list: No. 248 EU Annex designation: I/A1 - as Cronartium spp. (non-European) HOSTS The main aecial hosts are two- and three-needled Pinus spp., mainly jack pine (P. banksiana), across Canada, and lodgepole pine (P. contorta), in western Canada and USA. The western species Jeffrey pine (P. jeffreyi) and western yellow pine (P. ponderosa) are occasionally attacked. Of these species, P. contorta is widely planted in northern and western Europe and P.
    [Show full text]
  • White Pine Blister Rust Resistance in Pinus Monticola and P
    GENERAL TECHNICAL REPORT PSW-GTR-240 White Pine Blister Rust Resistance in Pinus monticola and P. albicaulis in the Pacific Northwest U.S. – A Tale of Two Species Richard A. Sniezko,1 Angelia Kegley,1 and Robert Danchok1 Western white pine (Pinus monticola Dougl. ex D. Don) and whitebark pine (P. albicaulis Engelm.) are white pine species with similar latitudinal and longitudinal geographic ranges in Oregon and Washington (figs. 1 and 2). Throughout these areas, whitebark pine generally occurs at higher elevations than western white pine. Both of these long-lived forest tree species are highly susceptible to white pine blister rust, caused by the non-native fungus Cronartium ribicola, and both have suffered extensive mortality in many parts of their range (Aubry et al. 2008, Fins et al. 2001, Geils et al. 2010, Schwandt et al. 2010). The high susceptibility of these two species to blister rust has limited their use in reforestation and restoration. In July 2011, due to multiple threats, including blister rust, whitebark pine was added as a candidate species eligible for protection under the United States Endangered Species Act and assigned a listing priority number of 2, which means the threats are of high magnitude and are imminent (U.S. Fish and Wildlife Service 2011). Gene conservation efforts with whitebark pine are underway (Mangold 2011; Sniezko et al. 2011b). Genetic diversity and genetic resistance to pathogens and insects are a species’ primary defense and avenue to evolving in the face of threats such as blister rust and climate change. Several operational programs in forest tree species to utilize this natural genetic resistance to help mitigate the impacts of invasive pathogens are well underway (Sniezko 2006; Sniezko et al.
    [Show full text]
  • Occurrence of White Pine Blister Rust on Cultivated Resistant and Immune Varieties of Ribes Species in New Hampshire and the Impact to Local White Pine Resources
    Occurrence of White Pine Blister Rust on Cultivated Resistant and Immune Varieties of Ribes Species in New Hampshire and the Impact to Local White Pine Resources Jen Weimer, NH Division of Forests and Lands Isabel A Munck, USDA Forest Service, Northeastern Area State and Private Forestry Kerik Cox and Sara Villani, Cornell University Philippe Tanguay, Canadian Forest Service Isabel Munck Isabel Munck INTRODUCTION METHODS PRELIMINARY RESULTS & CONCLUSIONS White Pine Blister Rust (WPBR) caused by the fungus Cronartium 2WPBR incidence on resistant Ribes often exceeded 50% ribicola was the most significant forest damage causing agent in depending on the variety, and this was expected New Hampshire for more than 60 years. Introduced to North America from Europe in the 1890s, thousands of foresters and 2WPBR incidence on immune Ribes varieties ranged from 1- laborers spent millions of hours destroying gooseberries and 60%, indicating that these plants are no longer immune currant plants throughout NH from 1917 to 1986 to protect the white pine timber industry. This monumental effort was designed 2Disease severity was greatest on the immune varieties to break the disease cycle and by the mid 1990s the occurrence Angeliotti (2008) of WPBR damage in the northeast was relatively rare. White pine 2Disease severity of resistant and wild Ribes was less than 5% is still the most economically important timber species in NH. Disease Severity was Rated Using a Scale Developed for Grape Rust 2Samples sent to Cornell were positive for Cronartium ribicola 2Samples sent to Canada successfully infected reliable accessions of immune cultivars, validating that strains from NH have overcome Ribes immunity 2WPBR incidence for white pines within 1000 feet of Ribes cultivars was 3-16% Isabel Munck Requests by growers to plant Ribes species in NH became more Isabel Munck 2WPBR incidence on white pine was greatest on eastern and abundant as resistant cultivars were being developed.
    [Show full text]
  • Diseases As Agents of Disturbance in Ponderosa Pine1
    Diseases as Agents of Disturbance in Ponderosa Pine1 Gregory M. Filip2 Abstract Several diseases affect the growth and survival of ponderosa pine in the Pacific Northwest and serve as agents of disturbance. Probably the most widespread and damaging class of disease agents is dwarf mistletoe, which causes serious growth loss and mortality of ponderosa pine. Dwarf mistletoes (Arceuthobium spp.) are seed plants that can parasitize all age classes of pine. Decades of research and observation have shown that although dwarf mistletoes spread slowly within and among trees, their localized effects can be quite spectacular. Root diseases caused by the fungi Armillaria ostoyae (Romagn.) Herink, Heterobasidion annosum (Fr.:Fr.) Bref., and Leptographium wageneri var. ponderosum (Harrington & Cobb) Harrington & Cobb cause localized mortality resulting in gaps in affected forests. Root diseases may spread by root contact, airborne spores, or insect vectors depending on the species of root disease fungi. Stem decays caused principally by Phellinus pini (Thore.:Fr.) A. Ames and Fomitopsis officinalis (Villars:Fr.) Bond. & Sing. result in single-tree gaps if trees break as a result of advanced decay. Decay fungi infect wounds on living trees, and decay may take decades to develop to where tree structural integrity is compromised. Stem diseases caused by rust fungi such as Cronartium comandrae Peck and C. coleosporiodes Arth. can kill the tops of trees or result in whole-tree mortality. Decayed and cankered trees can serve as habitat for a wide diversity of wildlife. Disturbances in ponderosa pine forests caused by forest diseases can affect forest succession, insect outbreaks, fire frequency and severity, and both animal and plant diversity.
    [Show full text]
  • Cronartium Ribicola Division of Forests and Lands Forest Protection Bureau–Forest Health Section
    PEST ALERT White Pine Blister Rust State of New Hampshire Department of Resources and Economic Development Cronartium ribicola Division of Forests and Lands Forest Protection Bureau–Forest Health Section Hosts: Five-needle pines including White Pine (Pinus strobus) in the northeast and Currants & Gooseberries (Ribes spp.) Distribution: Throughout all the states along the Atlantic seacoast inland to Tennessee and up through the upper Midwest. Also along the Pacific Seacoast inland to South Dakota and down to New Mexico. History: Introduced to North America from Europe in the 1890s, thousands of foresters and laborers spent millions of hours destroying gooseberries and currant plants throughout NH from 1917 to 1986 . This monumental effort Isabel Munck Isabel Munck was designed to break the disease cycle and Symptomatic Pines by the mid 1990s the occurrence of blister rust Identifying Symptoms: Signs of the disease are damage in the northeast was relatively rare. visible on Ribes species in the summer and fall Much research had gone into developing when rust colored uredia and telia are present on immune Ribes cultivars. By 2000 a short list of the undersides of leaves. On pine symptoms first 19 gooseberries and currants were available to appear as the disease infects the needles in the legally plant in NH if you provided the State fall. The infection is most apparent by recently with information on what species and cultivar killed branch flagging and stem cankers early you purchased off the list and where it was summer when orange aecia rupture the bark. being planted. In 2011 scientists in Connecticut documented the occurrence of Cronartium Life Cycle: infected Ribes nigrum cv.
    [Show full text]
  • Disease Resistance and Spring Phenological Characteristics of Ribes L. Germplasm
    AN ABSTRACT OF THE THESIS OF Daniel T. Dalton for the degree of Master of Science in Horticulture presented on April 7, 2009. Title: Disease Resistance and Spring Phenological Characteristics of Ribes L. Germplasm Abstract approved: __________________________________________________ Kim E. Hummer North American cultivation of Ribes L. may expand as small fruit growers seek species to diversify horticultural crops. The Ribes industry was suppressed for decades out of fear that cultivated black currants and gooseberries would intensify the fungal disease white pine blister rust (WPBR) on five-needle pine (Pinus L. section Quinquefoliae) species. These pines were historically vital to the timber industry. Today, plant breeders seek to strengthen the Ribes small fruit industry through production of material suitable for North American conditions. Paramount to this effort is the development of resistance against major pests and diseases. Growers must be able to recognize the attributes of available genotypes prior to field establishment. The objectives of this research were to determine disease resistance and phenological characteristics of Ribes selections at the United States Department of Agriculture, Agricultural Research Service, National Clonal Germplasm Repository (NCGR) in Corvallis, Oregon. Since the early 1930’s, plant breeders have used immune black currant (R. nigrum L.) germplasm as a control tactic against the exotic WPBR, caused by the basidiomycete fungus Cronartium ribicola J.C. Fischer. In 1999, a seedling population was generated at the NCGR from a cross involving susceptible pistillate R. nigrum ‘Ben Lomond’ and immune staminate parent R. ussuriense Jancz. × R. nigrum ‘Consort.’ To test the inheritance of resistance in the F1 population, aeciospore and urediniospore treatments were applied in 2008 to single-leaf softwood cuttings under controlled conditions in a greenhouse.
    [Show full text]
  • Pest Categorisation of Cronartium Spp. (Non-EU)
    SCIENTIFIC OPINION ADOPTED: 22 November 2018 doi: 10.2903/j.efsa.2018.5511 Pest categorisation of Cronartium spp. (non-EU) EFSA Panel on Plant Health (PLH), Claude Bragard, Francesco Di Serio, Paolo Gonthier, Marie-Agnes Jacques, Josep Anton Jaques Miret, Annemarie Fejer Justesen, Alan MacLeod, Christer Sven Magnusson, Panagiotis Milonas, Juan A Navas-Cortes, Stephen Parnell, Roel Potting, Philippe L Reignault, Hans-Hermann Thulke, Wopke Van der Werf, Antonio Vicent, Jonathan Yuen, Lucia Zappala, Johanna Boberg, Michael Jeger, Marco Pautasso and Katharina Dehnen-Schmutz Abstract Following a request from the European Commission, the EFSA Panel on Plant Health performed a pest categorisation of Cronartium spp. (non-EU), a well-defined and distinguishable group of fungal pathogens of the family Cronartiaceae. There are at least 40 species described within the Cronartium genus, of which two are considered native to the EU (C. gentianeum and C. pini) and one has been introduced in the 19th century (C. ribicola) and is now widespread in the EU – these three species are thus not part of this pest categorisation. In addition, the non-EU C. harknessii, C. kurilense and C. sahoanum were already dealt with in a previous pest categorisation. All the non-EU Cronartium species are not known to be present in the EU and are regulated in Council Directive 2000/29/EC (Annex IAI) as harmful organisms whose introduction into the EU is banned. Cronartium spp. are biotrophic obligate plant pathogens. Many of the North American Cronartium species alternate between the aecial host Pinus spp. and telial hosts of various dicotyledonous plants. C.
    [Show full text]
  • Introduction to Rust Diseases
    Introduction to Rust Diseases Specialized foliage and/or canker diseases often with alternate hosts Rust diseases are grouped based on the taxonomic classification of the pathogens.They are fungi in the phylum Basidiomycota, class Pucciniomycetes, and order Pucciniales. Rusts are all obligate parasites that depend on the living cells of their hosts. Initially, they produce structures (haustoria) that grow into their hosts’ living cells, from which they derive nutrients. The diseases caused by this group are varied. Most of the rust fungi initially infect and cause diseases of foliage. However, some spread into branches and stems, colonizing the phloem and cambium. Rusts cause cankers (dis- eases of the bark), galls, brooms, foliage diseases, and/or cone diseases. The majority of the rust diseases in this Region are native pathogens, with the exception of white pine blister rust. Table 9 provides examples of some of the most damaging and/or common rusts in the region (figs. 1-7). However, many other rusts occur within the Rocky Mountain Region. Signs and Symptoms—The common name, “rusts,” comes from the rust-like appearance of the various spore structures that are often rust-colored, yellow, and/or orange. These brightly colored signs help to distinguish rusts from other diseases. If signs are not present, symptoms may look like other foliage or canker diseases, with dis- colored foliage or branch flagging (faded and dying branches). Stem rusts often can be identified by the host and shape of the cankers or galls. The cankers usually have distinctive roughness on their margin that are the remains of earlier fruiting structures.
    [Show full text]
  • Climatic Correlates of White Pine Blister Rust Infection in Whitebark Pine in the Greater Yellowstone Ecosystem
    Article Climatic Correlates of White Pine Blister Rust Infection in Whitebark Pine in the Greater Yellowstone Ecosystem David P. Thoma 1,* , Erin K. Shanahan 1 and Kathryn M. Irvine 2 1 Greater Yellowstone Inventory and Monitoring Network, National Park Service, Bozeman, MT 59715, USA 2 U.S. Geological Survey, Northern Rocky Mountain Science Center, Bozeman, MT 59715, USA * Correspondence: [email protected]; Tel.: +1-406-994-7725 Received: 29 June 2019; Accepted: 4 August 2019; Published: 7 August 2019 Abstract: Whitebark pine, a foundation species at tree line in the Western U.S. and Canada, has declined due to native mountain pine beetle epidemics, wildfire, and white pine blister rust. These declines are concerning for the multitude of ecosystem and human benefits provided by this species. An understanding of the climatic correlates associated with spread is needed to successfully manage impacts from forest pathogens. Since 2000 mountain pine beetles have killed 75% of the mature cone-bearing trees in the Greater Yellowstone Ecosystem, and 40.9% of monitored trees have been infected with white pine blister rust. We identified models of white pine blister rust infection which indicated that an August and September interaction between relative humidity and temperature are better predictors of white pine blister rust infection in whitebark pine than location and site characteristics in the Greater Yellowstone Ecosystem. The climate conditions conducive to white pine blister rust occur throughout the ecosystem, but larger trees in relatively warm and humid conditions were more likely to be infected between 2000 and 2018. We mapped the infection probability over the past two decades to identify coarse-scale patterns of climate conditions associated with white pine blister rust infection in whitebark pine.
    [Show full text]
  • WHITE PINE BLISTER RUST Cronartium Ribicola J. C. Fisch
    Hosts Causes of Similar Symptoms WHITE PINE • Eastern white pine (Pinus strobus) • Fungal root rots • Other fi ve-needled pines • Pales weevil BLISTER RUST • Pine root collar weevil Cronartium ribicola Alternate Hosts J. C. Fisch • Currants Identifi cation • Gooseberry White pine blister rust is the only stem rust • Other Ribes species of fi ve-needled pines. It requires an alter- nate host (Ribes species) for new infections Damage Potential to occur on pine. • Moderate–high Early detection can be diffi cult due to very subtle symptoms during the fi rst year of Symptoms and Signs infection. First, a small, yellow or red spot On Pine appears on the needle at the site of infection Year-round: and eventually the needle may die as the • Chlorotic needles, stunted growth fungus grows into the bark tissue. The newly infected bark tissue will become brown with • Chlorotic, dead, or dying tree tops or a yellow border surrounding a section of dead Elliptical cankers covered branches with yellow blisters that needles. The stem may be slightly swollen. release infectious spores to • Yellow-bordered cankers on trunk or During the second year of infection 3- to 4-year-old branches; oozing resin or be carried away by the wind. and beyond, long, elliptical-shaped cankers Courtesy of Tracey Olson, rodent feeding may be apparent develop on branches and the main trunk as PDA • Resin fl ow on main trunk that hardens to the fungus advances. Cankers can eventu- white, orange, or brown ally girdle the branch, which results in Early spring: “fl agging” (Fig. 1), or they can girdle the • Orange-yellow blisters breaking through trunk, killing all growth above the canker.
    [Show full text]