Thomas Nash

Thomas Nash

Emeritus Professor,
School of Life Sciences Interdisciplinary Graduate faculty
  • tom.nash@asu.edu
  • Phone: 480-965-7735
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  • LSE 739 TEMPE, AZ 85287-4501
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Biography Research Teaching Public Work
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Publications
  • Garvie, L.A.J., Knauth, L.P., Bungartz, F. and Nash III, T.H. Life in extreme environments: Survival strategy of the endolithic desert lichen, Verrucaria rubrocinctra. Die Naturwissenschaften (2008).
  • Kranner, I., Beckett, R., Hochman, A. And Nash III, T.H. Desiccation tolerance in lichens: a review. The Bryologist (2008).
  • Riddell, J., Nash III, T.H. and Padgett, P. The effect of HNO3 gas on the lichen Ramalina menziesii. Flora (Jena) (2008).
  • Nash III, Thomas H. Lichen Biology. (2008).
  • Green, T.G.A., Nash III, T.H., and Lange, O.L. Physiological ecology of carbon dioxide exchange. Lichen Biology (2008).
  • Nash III, T.H. Introduction. Lichen Biology (2008).
  • Nash III, T.H. Lichen sensitivity to air pollution. Lichen Biology (2008).
  • Nash III, T.H. Nitrogen, its metabolism and potential contribution to ecosystems. Lichen Biology (2008).
  • Nash III, T.H. Nutrients, elemental accumulation and mineral cycling. Lichen Biology (2008).
  • Palmqvist, K., Dahlman, L., Jonsson, A., and Nash III, T.H. The carbon economy of lichens. Lichen Biology (2008).
  • Nash III, T.H. and M.R.D. Seaward (compilers). Biology of Lichens and Bryophytes. Miscellaneous Publication No. 2008 of the American Bryological and Lichenological Society and the International Association of Lichenology, Tempe, AZ (2008).
  • Nash, Thomas, de los Angeles Herrera, Maria. The Lichens of Sonora, the Heart of the Sonoran Desert Region. American Bryological & Lichenological Society (2008).
  • Riddell, J, TH Nash III, P Padgett. Toxic effects of two common air pollutants in arid climates, ozone (O3) and nitric acid (HNO3) on two lichen species in the Los Angeles air basin. Air Pollution Workshop, Raleigh, NC (2008).
  • Riddell, Jennifer, Nash, Thomas, Padgett, Pamela. Investigating the effects of nitric acid on Ramalina menziesii Tayl. American Bryological and Lichenological Society (2008).
  • Sweat, Ken, Nash, Thomas, Prapaipong, Panjai, Gremillion, Paul. Comparison of Trace Metal Deposition in northern and central Arizona. American Bryological and Lichenological Society (2008).
  • Nash, Thomas H, Gries, C, Bungartz, F. Lichen Flora of the Greater Sonoran Desert Region. Vol. III. (2007).
  • Hertel, H.,Nash, Thomas H,Ryan, B. D. Catillaria. Lichen Flora of the Greater Sonoran Desert Region (2007).
  • Nash, Thomas H. Key XI Sterile Crustose Lichens. Lichen Flora of the Greater Sonoran Desert Region (2007).
  • Nash, Thomas H. Sarea. Lichen Flora of the Greater Sonoran Desert Region (2007).
  • Nash, Thomas H,Ryan, B. D. Maronea. Lichen Flora of the Greater Sonoran Desert Region (2007).
  • Nash, Thomas H,Ryan, B. D. Megaspora. Lichen Flora of the Greater Sonoran Desert Region (2007).
  • Timdal, E.,Nash, Thomas H. Gypsoplaca. Lichen Flora of the Greater Sonoran Desert Region (2007).
  • Triebel, D.,Peršoh, D.,Nash, Thomas H,Zedda, L.,Rambold, G. LIAS – an interactive database system for structured descriptive data of ascomycetes. Biodiversity Databases: Techniuqes, Politics & Applications (2007).
  • Westberg, M.,Nash, Thomas H. . Lichen Flora of the Greater Sonoran Desert Region (2007).
  • H KASHIWADANI, Thomas Nash, K Moon. Two new species of the genus Ramalina (Ascomycotina: Ramalinaceae) from South America. Bibliotheca Lichenologica (2006).
  • Nash, Thomas, Riddell, J. Historical Perspectives and New Opportunities in the Use of Lichens as Air Pollutant Monitors. (2006).
  • K Sweat, W Iselin, S Bates, Thomas Nash. The lichens of Parashant National Monument, Arizona: a preliminary study. Journal of the Arizona-Nevada Academy of Science (2005).
  • Nash, Thomas. Physiological Perspectives on Desiccation Tolerance in Lichens. (2005).
  • Nash, Thomas, TRIEBEL, DAGMAR, ZEDDA, LUCIANA, RAMBOLD, GERHARD. INTKEY - AN INTERACTIVE KEYING SYSTEM WITH AN EXAMPLE FOR LICHENS. (2005).
  • D Triebel, D Persoh, Thomas Nash, L Zedda, G Rambold. LIAS - an online database system for descriptive data of Ascomycetes. Proceeding, International Association of Lichenology (2004).
  • F Bungartz, J Elix, Thomas Nash. The genus Buellia sensu lato in the greater Sonoran Desert region: saxicolous species with one-septate ascospores containing xanthones. Bryologist (2004).
  • F Bungartz, L Garvie, Thomas Nash. Anatomy of the endolithic Sonoran Desert lichen Verrucaria rubrocincta Breuss: implications for biodeterioration and biomineralization. The Lichenologist (2004).
  • F Bungartz, Thomas Nash. Buellia subalbula (Nyl.) Müll. Arg. and B. amabilis de Lesd., two species from North America with one-septate ascospores: A comparison with Buellia ["Diplotomma"] venusta (Körb.) Lettau. Bibliotheca Lichenologica (2004).
  • F Bungartz, Thomas Nash. Buellia turgescens is synonymous with Buellia badia and must not be included in Amandinea. The Bryologist (2004).
  • F Bungartz, Thomas Nash. The Buellia aethalea-group in the greater Sonoran Desert Region with reference to similar species in North America. The Bryologist (2004).
  • F Bungartz, Thomas Nash. The lichen genus Buellia De Not in the Greater Sonoran Desert Region: saxicolous species with one-septate ascospores. Abstracts, International Association of Lichenology (2004).
  • F Bungartz, Thomas Nash, B Ryan. Morphology and anatomy of chasmolithic versus epilithic growth: a taxonomic revision of inconspicuous saxicolous Buellia species from the Sonoran Desert Region generally ascribed to the "Buellia punctata" group. Canadian Journal of Botany (2004).
  • K Sweat, W Iselin, S Bates, Thomas Nash. The lichens of Parashant National Monument, Arizona: a preliminary study. J. Ariz.-Nevada Acad. Sci (2004).
  • Thomas Nash, C Gries, G Rambold. Interactive keys: the heart of a virtual flora. American Journal of Botany Abstracts (2004).
  • Thomas Nash, J Elix, M Herrera-Campos. Preliminary treatment of Xanthoparmelia for Mexico. Symb. Bot. Ups (2004).
  • Nash, Thomas H, Ryan, B D, Diederich, P, Gries, C, Bungartz, F. Lichen Flora of the Greater Sonoran Desert Region. Vol. II. (2004).
  • Hafellner, J (Author) ,Nash, Thomas H (Author) ,Ryan, B D (Author) . Calvitimela. Lichen Flora of the Greater Sonoran Desert Region. Vol. II (2004).
  • Hertel, H (Author) ,Nash, Thomas H (Author) . Clauzadeana. Lichen Flora of the Greater Sonoran Desert Region. Vol. II (2004).
  • Jorgensen, P M (Author) ,Nash, Thomas H (Author) . Leptogium. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Kalb, K (Author) ,Ryan, B D (Author) ,Nash, Thomas H (Author) . Ophioparma. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Kashiwadani, H (Author) ,Nash, Thomas H (Author) . Ramalina. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Nash, Thomas H (Author) ,Elix, J A (Author) . Xanthoparmelia. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Nash, Thomas H (Author) ,Hafellner, J (Author) . Absconditella. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Nash, Thomas H (Author) ,Kainz, C (Author) ,Zedd, L (Author) ,Ryan, B D (Author) ,Rambold, G (Author) . Miriquidica. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Nash, Thomas H (Author) ,Kalb, K (Author) ,Rambold, G (Author) . Tephromela. Lichen Flora of the Greater Sonoran Desert Region. Vol. II (2004).
  • Nash, Thomas H (Author) ,Tonsberg, T (Author) . Gyalideopsis. Lichen Flora of the Greater Sonoran Desert Region. Vol. II (2004).
  • Roemer, J (Author) ,Nash, Thomas H (Author) ,Lumbsch, H T (Author) ,Messuti, M I (Author) . Ochrolechia. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Ryan, B D (Author) ,Lumbsch, H T (Author) ,Messuti, M I (Author) ,Printzen, C (Author) ,Sliwa, L (Author) ,Nash, Thomas H (Author) . Lecanora. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Ryan, B D (Author) ,Nash, Thomas H (Author) . Sporastatia. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Ryan, B D (Author) ,Nash, Thomas H (Author) ,Hafellner, J (Author) . Protoparmelia. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Ryan, B D (Author) ,Tonsberg, T (Author) ,Nash, Thomas H (Author) ,Hafellner, J (Author) . Pyrrhospora. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • Schultz, M (Author) ,Ryan, B D (Author) ,Nash, Thomas H (Author) . Collema. Lichen Flora of the Greater Sonoran Desert Region (2004).
  • H Lumbsch, M Messuti, Thomas Nash. New or overlooked species in the Lecanora subfusca group in southwestern North America (Lecanorales, Ascomycotina). The Bryologist (2003).
  • H Lumbsch, M Messuti, Thomas Nash. Ochrolechia splendens (Pertusariaceae), a new species from south-western North America. Lichenologist (2003).
  • J Elix, Thomas Nash. A tribute to William Louis Culberson. Lichenologist (2003).
  • T Zschau, S Getty, C Gries, Y Ameron, A Zambrano, Thomas Nash. Spatial and temporal deposition patterns in Maricopa County, Arizona, to lichens. Environmental Pollution (2003).
  • Thomas Nash, C Gries, T Zschau, S Getty, Y Ameron. Historical patterns of metal atmospheric deposition to the epilithic lichen Xanthoparmelia in Maricopa County, Arizona, U.S.A. Journal of Physics IV (France) (2003).
  • W Davis, C Gries, Thomas Nash. The influence of temperature on the weight and net photosynthesis of the aquatic lichen Peltigera hydrothyria over long periods of time. Bibl. Lichenol (2003).
  • F Bungartz, C Scheidegger, Thomas Nash. Buellia dispersa A. Massal., a diverse lichen species from semi-arid to arid environments of North America and Europe. Bibliotheca Lichenologica (2002).
  • H Kashiwadani, Thomas Nash. New species of the genus Ramalina (Ascomycotina: Ramalinaceae) from the Sonoran Desert. Mycotaxon (2002).
  • J Hafellner, D Triebel, B Ryan, Thomas Nash. On lichenicolous fungi from North America II. Mycotaxon (2002).
  • R Schoeninger, C Gries, Thomas Nash. Herbarium databases: creation and maintenance. Bibliotheca Lichenologica (2002).
  • Thomas Nash, C Gries. Lichens as bioindicators of sulfur dioxide. Symbiosis (2002).
  • Thomas Nash, C Gries, G G Rambold. Lichen Floras: Past and Future for North America. Bryologist (2002).
  • W Davis, C Gries, Thomas Nash. The influence of temperature on the weight and net photosynthesis of the aquatic lichen Peltigera hydrothyria over long periods of time. Bibliotheca Lichenologica (2002).
  • Nash, Thomas H, Ryan, B D, Gries, C, Bungartz, F. Lichen Flora of the Greater Sonoran Desert Region. Vol. I. (2002).
  • Zambrano, A (Author) ,Nash, Thomas H (Author) ,Herrera-Campos, M A (Author) . Lichens and air pollution in the forests surrounding Mexico City. Urban Air Pollution and Forests. Resources at Risk in the Mexico City Air Basin (2002).
  • M Herrera-Campos, Thomas Nash, A Zambrano. A revision of the Usnea fragilescens group for Mexico. Bryologist (2001).
  • Thomas Nash, M Thomas, J Hoober, C Gries, S-X Zheng. Free amino acids in lichens and their symbionts. Bibliotheca Lichenologica (2001).
  • A Zambrano Garcia, Thomas Nash, M Herrera-Campos. Lichen decline in Desierto de los Leones (Mexico City). Bryologist (2000).
  • A Zambrano, Thomas Nash. Lichen responses to short-term transplantation in Desierto de los Leones, Mexico City. Environmental Pollution (2000).
  • A Zambrano, Thomas Nash, C Gries. Responses of Ramalina farinacea (L.) Ach. to transplanting in southern California and to gaseous formaldehyde. Bibliotheca Lichenologica (2000).
  • B Ryan, Thomas Nash, J Hafellner, R Moberg, L Tibell, T Ahti, O Breuss. New records of lichens from México. Nova Hedwigia (2000).
  • U Kuhn, A Wolf, C Gries, Thomas Nash, J Kesselmeier. Field measurements on the exchange of carbonyl sulfide between lichens and the atmosphere. Atmospheric Environment (2000).
  • W Davis, C Gries, Thomas Nash. The ecophysiological response of the aquatic lichen Hydrothyria venosa to nitrate in terms of weight and photosynthesis over long periods of time. Bibliotheca Lichenologica (2000).
  • Herrera-Campos, M A (Author) ,Nash, Thomas H (Author) . Sistemática, diversidad y filogenia de líquenes. Enfoques contemporáneos para el estudio de la biodiversidad (2000).
Research Activity
  • Nash,Thomas H*. Physiological and biochemical characterization of the effects of oxidant air pollutants, ozone and gas-phase nitric acid, on plants and lichens. USDA-BARD(11/1/2008 - 10/31/2009).
  • Nash,Thomas H*, Gilbert,Edward Erik, Gries,Corinna. Symbiota, A Virtual Flora Model for the Southwestern United States. NSF-BIO(7/15/2008 - 6/30/2012).
  • Nash,Thomas H*. Towards an Inventory of the Lichens of Mexico with an Emphasis on the Parmeliaceae. NSF-BIO(10/1/2006 - 9/30/2011).
  • Nash,Thomas H*. EPA STAR: Determining the Effect of the Urban Air Pollutants HNO3 and O3 on Lichens. USEPA-REGION 9(8/1/2006 - 7/31/2010).
  • Nash,Thomas H*. Investigations of the Fungi at Grand Canyon-Parashant National Monument. DOI-NPS(5/15/2006 - 5/31/2008).
  • Nash,Thomas H*. Investigations of the Fungi at Sites Managed by BLM in southwestern USA. DOI-BLM(5/15/2006 - 6/30/2010).
  • Childers,Daniel L*, Aggarwal,Rimjhim M, Allen,Jonathan Ostrom, Allen,Jonathan Ostrom, Anderies,John M, Anderies,John M, Arrowsmith,Ramon, Basile,George Matthew, Basile,George Matthew, Bolin,Robert, Bolin,Robert, Boone,Christopher G, Boone,Christopher G, Brazel,Anthony J, Briggs,John M, Deviche,Pierre, Earl,Stevan Ross, Elser,Monica Mueller, Faeth,Stanley H, Fraser,Matthew P, Gries,Corinna, Grimm,Nancy B, Grossman Clarke,Susanne, Hall,Sharon, Harlan,Sharon, Harlan,Sharon, Harlan,Sharon, Hartnett,Hilairy, Hope,Diane, Johnson,James Chadwick, Johnson,James Chadwick, Kaye,Jason, Kinzig,Ann, Kuby,Lauren H, Larson,Kelli Leigh, Majumdar,Anandamayee, Martin,Chris A, Martin,Chris A, Mccartney,Peter H, Myint,Soe W, Nash,Thomas H, Nation,Marcia L, Peccia,Jordan Lee, Redman,Charles L, Redman,Charles L, Sabo,John L, Shears,Brenda L, Shock,Everett, Shock,Everett, Smith,Vincent Kerry, Stutz,Jean C, Stutz,Jean C, Tarrant,Philip E, Turner II,Billie Lee, Wentz,Elizabeth Ann, Westerhoff,Paul, Wiek,Arnim, Wu,Jianguo, Wutich,Amber Yoder, Yabiku,Scott Thomas, York,Abigail. Central Arizona Phoenix LTER: Phase 2. NSF-BIO(12/1/2004 - 11/30/2011).
  • Nash,Thomas H*. Lichens and Air Pollution in Southern California. USDA-FS(6/1/2004 - 9/1/2007).
  • Nash,Thomas H*. Forest Tilt Monitoring with Lichens. UNIV OF WISCONSIN-BUSINESS SCH(4/1/2004 - 3/31/2005).
  • Nash,Thomas H*. Identification of Arizona macrolichen specimens as part of the USDA Forest Service Inventory and Analysis Program. UNIV OF WISCONSIN-BUSINESS SCH(6/1/2003 - 3/31/2004).
  • Nash,Thomas H*. BASELINE INVESTIGATIONS OF THE LICHENS AND BRYOPHYTES AT GRAND CANYON-PARASHANT NATIONAL MONUMENT. DOI-NPS(5/1/2003 - 5/31/2007).
  • Nash,Thomas H*, Dillman,Karen Louise. LICHENS OF COASTAL SOUTHEASTERN ALASKA. DOI-FWS(7/30/2002 - 9/1/2004).
  • Garcia-Pichel,Ferran*, Nash,Thomas H, Schmidt,Jean M. PROKARYOTIC DIVERSITY OF BIOLOGICAL SOIL CRUSTS IN ARIDLANDS OF N. AMERICA. NSF-BIO(6/1/2002 - 5/31/2009).
  • Nash,Thomas H*. LICHEN COMMUNITIES FOR FOREST INVENTORY AND ANALYSIS IN THE UNITED STATES. UNIV OF WISCONSIN-BUSINESS SCH(3/15/2002 - 12/31/2002).
  • Nash,Thomas H*. COMPLETION OF THE GREATER SONORAN DESERT LICHEN FLORA PROJECT. NSF-BIO(8/15/2001 - 7/31/2005).
  • Nash,Thomas H*. COMPLETION OF SONORAN DESERT AND ASU LICHEN DATABASES. NSF-BIO(4/1/2001 - 5/31/2005).
  • Redman,Charles L*, Allen,Jonathan Ostrom, Anderies,John M, Arrowsmith,Ramon, Bolin,Robert, Brazel,Anthony J, Briggs,John M, Christensen,Philip R, Elser,Monica Mueller, Faeth,Stanley H, Fisher,Stuart G, Gober,Patricia, Gries,Corinna, Grimm,Nancy B, Harlan,Sharon, Hogan,Timothy D, Hope,Diane, Kaye,Jason, Kinzig,Ann, Martin,Chris A, Martin,Chris A, Mccartney,Peter H, Nash,Thomas H, Peccia,Jordan Lee, Pijawka,David, Shears,Brenda L, Sommerfeld,Milton R, Staley,Frederick Allan, Stutz,Jean C, Wentz,Elizabeth Ann, Westerhoff,Paul, Wu,Jianguo, Zehnder,Joseph A. CENTRAL ARIZONA-PHOENIX LTER. NSF-BIO(8/18/1997 - 12/31/2006).
  • Nash,Thomas H*. SONORAN DESERT & MEDITERRANEAN CALIFORNIA LIHEN FLORA PROJECT. NSF-BIO(8/15/1997 - 7/31/2001).
  • Nash,Thomas H*. SYSTEMATICS OF SELECTED SONORAN LICHEN FAMILIES. NSF-BIO(8/15/1997 - 7/31/2000).
  • Nash,Thomas H*. VEGETATION RECOVERY FOLLOWING CESSATION OF SMELTING OPERATIONS AT SUPERIOR, ARIZONA. CYPRUS MINERALS CO(5/16/1997 - 8/31/1998).
  • Nash,Thomas H*. ASU LICHEN COLLECTION IMPROVEMENT-LICHEN HERBARIUM SUPPORT GRANT. NSF-BIO(8/15/1996 - 7/31/2000).
  • Nash,Thomas H*. INTERACTION OF URBAN ORGANO-AIR POLLUTANTS & LICHENS. US MEXICO FDN FOR SCIENCE(5/1/1995 - 12/31/1997).
  • Nash,Thomas H*. INTERNATIONAL COLLABORATION: DISSERTATION ENHANCEMENT. NSF-SBE(4/21/1995 - 11/30/1995).
  • Nash,Thomas H*, Gries,Corinna. FUMIGATION OF LICHENS. USDA-FS(11/1/1994 - 3/31/1995).
  • Nash,Thomas H*, Hoober,John Kenneth. STUDIES ON THE MECHANISMS UNDERLYING LICHEN SENSITIVITY TO S. USEPA-REGION 9(9/28/1994 - 3/27/1998).
  • Nash,Thomas H*. LICHEN PHOTOSYNTHETIC INTEGRITY. USDA-FS(9/15/1994 - 4/1/1995).
  • Nash,Thomas H*. STIKINE AREA LICHEN TISSUE. USDA-FS(4/1/1994 - 7/30/1994).
  • Nash,Thomas H*. SONORA DESERT LICHEN FLORA. NSF-BIO(5/13/1992 - 4/30/1997).
  • Nash,Thomas H*. LICHEN GREENHOUSE FUMIGATION STUDY. USDA(9/12/1991 - 7/31/1992).
  • Nash,Thomas H*. LICHEN SURVEY OF THE GRAND CANYON NATIONAL PARK. DOI(7/15/1991 - 12/31/1992).
  • Nash,Thomas H*. LICHENS OF MT. BALDY WILDERNESS. USDA(7/12/1990 - 12/1/1990).
  • Nash,Thomas H*. GASEOUS DEPOSITION IN CANOPIES:THE ROLE OF EPIPHYTIC LICHENS. USEPA-REGION 9(7/11/1990 - 7/10/1994).
  • Nash,Thomas H*. CONTROLS OF ECOSYSTEM LEVEL FUNCTIONS IN A LICHEN-OAK WOODLD. NSF(10/25/1989 - 11/30/1993).
  • Nash,Thomas H*. LICHEN STUDY. USDA(7/19/1989 - 9/30/1990).
  • Nash,Thomas H*. CHEMOSYSTEMATICS AND PHLOGENETICS OF S.AMERICAN XANTHOPARMEL. NSF(5/1/1988 - 4/30/1992).
Presentations
  • BATES, S.T., NASH III, T.H. and GARCIA-PICHEL, F. Investigation of fungal populations and diversity associated with biological soil crusts in the Western United States using culture-independent methods. International Association of Lichenology 6 and the American Bryological & Lichenological Society (Jul 2008).
  • HEINDL-TENHUNEN, BAERBEL, ZEDDA, LUCIANA, NASH III, THOMAS H., BARBER, ANNE, NEUBACHER, DIETER, TRIEBEL, DAGMAR and RAMBOLD, GERHARD. LIAS light" – an online-identification tool for lichens. International Association of Lichenology 6 and the American Bryological & Lichenological Society (Jul 2008).
  • RIDDELL, JENNIFER A., PADGETT, PAMELA E., and NASH III, THOMAS H. Toxic effects of two arid climate pollutants, ozone (O3) and gaseous nitric acid (HNO3) on two lichen species in the Los Angeles air basin. International Association of Lichenology 6 and the American Bryological & Lichenological Society (Jul 2008).
  • SWEAT, KEN, NASH III, THOMAS H., PRAPAIPONG, PANJAI, and GREMILLION, PAUL. Geographic Patterns of trace Metal Deposition using the Lichen Xanthoparmelia in northern and central Arizona, USA. International Association of Lichenology 6 and the American Bryological & Lichenological Society (Jul 2008).
Service
  • ASU campus Arboretum Committee, Member (2008 - Present)
  • IT Committee, committee member (2005 - Present)
  • University of Goettingen, seminar speaker (2005 - Present)
  • Ecological Applications, manuscript reviewer (2005 - Present)
  • Bibliotheca Lichenologica, Associate Editor (1996 - 2009)
  • ASU Lichen Herbarium, Director (1972 - 2009)
  • American Bryological and Lichenological Society, Chair, Nomination Committee (2008 - 2009)
  • Journal of Ecology, manuscript reviewer (2008 - 2008)
  • Bryologist, manuscript reviewer (2008 - 2008)
  • International Association of Lichenology 6 and the American Bryological & Lichenological Society, Principal organizer for the whole meeting (2004 - 2008)
  • International Association for Lichenology, Council Member (2004 - 2008)
  • SoLS Takes a Hike, Subject leader (2008 - 2008)
  • American Bryological and Lichenological Society (ABLS), Symposium Organizer (2005 - 2006)
  • American Bryological and Lichenological Society, Lichen exchange director (2000 - 2006)
  • Intel International Science and Engineering Fair (Phoenix), Judge (2005 - 2006)
  • Collections Working Group, Participant (2005 - 2006)
  • Molecular Phylogenetics and Evolution, Manuscript reviewer in 2005 (2005 - 2005)
  • Bryologist, Review of proposals (4) (2005 - 2005)
  • Bryologist, Review of proposals (5) (2005 - 2005)
  • Science for the Total Environment, review of manuscripts (2) (2005 - 2005)
  • National Science Foundation, Review of proposals (2) (2005 - 2005)
  • National Science Foundation, Review of proposals (3) (2005 - 2005)
  • American Bryological and Lichenological Society, Lichen exchange director - dispersed ca. 1200 specimens twice a year with about 35 people participating) (2000 - 2005)
  • Committee on Doctorate Education, advisory (2004 - 2005)
  • Collections Committee, coChair (2004 - 2005)
  • Natural Sciences Museum at ASU, Chair (2004 - 2004)
  • Ecological Applications, reviewer of two manuscripts (2004)
  • Environmental Pollution, Reviewer of a manucript (2004)
  • Journal of Environmental Quality, reviewer of a manuscript (2004)
  • Mycotaxon, reviewer of several manuscripts (2004)
  • National Science Foundation, reviewer of several proposals (2004)
  • Natural Sciences Museum at ASU, Chair (2004)
  • The Bryologist, Manuscript reviewer (2004)
  • The Lichenologist, Reviewer of a manuscript (2004)
  • Austrian Research Council, B. Review of research proposals (1) (2003)
  • Bryologist (3), review of manuscripts (2003)
  • CLAS, reviewer of the doctoral program (Constructing a More Valuable Ph.D.) (2003)
  • Department of Plant Biology, Graduate Student Director (2003)
  • Dept. of Plant Biology, consulted with a number of students on statistical design of their research (2003)
  • National Science Foundation, Review of proposals (4) (2003)
  • Univeristy of Nebraska at Omaha, seminar speaker (2003)
  • University of Bayreuth, Field excursion leader (2003)
  • University of Cincinnati, Seminar speaker (2003)
  • Graduate Fellowship Panel, U.S. Environmental Protection Agency, Member (1997 - 2001)
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