Thomas Hawkes Nash III | |
---|---|
Born | |
Alma mater | |
Known for | Lichen Flora of the Greater Sonoran Desert Region 3 vols., 2002–2007 |
Awards | Acharius Medal |
Scientific career | |
Fields | Botany, lichenology |
Institutions | Arizona State University |
Author abbrev. (botany) | T.H.Nash |
Thomas Hawkes Nash III (born November 13, 1945) is an American lichenologist. His research is about the biology and ecology of lichens, and the effects of air pollution on plants and lichens. He is known as an authority on the family Parmeliaceae. During his long career at the Arizona State University, he helped develop the lichen herbarium into a world-class collection with over 100,000 specimens representing more than 5000 species. In 2010, the year of his retirement, he was awarded the Acharius Medal for lifetime achievements in lichenology, and the following year had a Festschrift published in his honor.
Nash was born in Arlington, Virginia, in 1945. He received a B.Sc. from Duke University in 1967. It was around this time that he was introduced to lichens by ecologist Larry Bliss; he would later take an advanced undergraduate class on lichens given by William Culberson, and a lichenology summer course given by Mason Hale. Nash later went on to earn an M.Sc. (1969, botany) and Ph.D. (1971, botany and statistics) from Rutgers University, [1] under the supervision of ecologist Murray Fife Buell. [2] His Ph.D. thesis, titled Effect of Effluents from a Zinc Factory on Lichens, [1] was later published in the journal Ecological Monographs . [3]
Shortly after graduation, he accepted an assistant professorship from Arizona State University in Tempe, where he has spent much of his scientific career. He was promoted to associate professor of botany in 1976, and became a full professor with this institution in 1981. He taught courses in ecology, lichenology, statistics, and, on one occasion, bryology. Nash retired from Arizona State University in 2010. [1] For thirty years Nash and his students investigated Southern California's lichen communities and used them as biomonitors of air quality in the Los Angeles air basin. [4] After his retirement, Nash volunteered with the Wisconsin State Herbarium at the University of Wisconsin–Madison. [5]
Nash has developed a collection of over 110,000 lichen samples for the Arizona State University herbarium, for which he was the curator; [6] about 40,000 of these were collected by Nash himself during his nearly four decades at Arizona State University. [2] The collection features about 450 type specimens, and is represented by about 5,500 different species – about one-quarter of the known lichen species in the world. [1] It is among the ten largest collections of lichens in the United States. [2] Nash curated and edited the exsiccata series Lichenes exsiccati, distributed by Arizona State University. [7] His research is largely focused on the biology of lichens and the effects of air pollution on plants. He uses an interdisciplinary approach to research, and the topics of his research publications include ecophysiology, ecology, taxonomy, floristics, and biomonitoring. [8] He developed an interest in lichen physiology after working for a while with Otto Ludwig Lange at the University of Würzburg. Nash's interest in taxonomy developed with his work on the flora of the southwestern United States, and he is considered a leading expert in the family Parmeliaceae, particularly the genera Hypotrachyna and Xanthoparmelia . [1]
Major works by Nash include a revision of Xanthoparmelia species in South America, a monograph on Hypotrachyna for the journal Flora Neotropica, and a three-volume set on the lichen flora of the Greater Sonoran Desert. [1] [9] The latter project, funded by the National Science Foundation, was a large collaborative work involving more than 90 scientists from 23 countries. [6] [8] Taking almost 18 years to complete, much of the effort was taken up through numerous field trips to hundreds of localities throughout the region. As a result, this work, which covers almost 2,000 species – about 40% of the lichens known in North America – is considered an "authoritative taxonomic treatment" that "profoundly increased the understanding of the lichen biodiversity of the Sonoran Desert and surrounding environs". [1] These collecting expeditions resulted in the discovery of about 175 species new to science. [2]
In 2008, Nash was the chair of the organizing committee for the sixth International Lichenological Symposium, which was held at the Asilomar Conference Grounds in Monterey, California. [6] [10] As of 2011, Nash had mentored 30 graduate students (19 Ph.D. and 11 Masters), and authored or co-authored more than 200 peer-reviewed scientific publications. [1]
Thomas Nash is married to Corinna Gries, who is a professional in biodiversity informatics. She was a researcher in the Long Term Ecological Research Network in Arizona, and later at the University of Wisconsin. [1]
Nash was secretary of the International Association for Lichenology in the years 1971–1977, and the president of the American Bryological and Lichenological Society from 1981 to 1983. He was an associate editor for the scientific journal Bibliotheca Lichenologica from 1996 to 2008, and a member of several scientific societies: the American Institute of Biological Sciences, the Ecological Society of America, the Organization for Tropical Studies, and Sigma Xi. [1]
Nash has been a Fulbright scholar, a fellow of the Arizona-Nevada Academy of Science, and thrice an Alexander von Humboldt fellow. [1]
In 2010, Nash was awarded the Acharius Medal for lifetime achievements in lichenology. [11] In 2011, he was honored with a Festschrift in the journal Bibliotheca Lichenologica . [12] This volume, published on the occasion on his 65th birthday, contains 33 articles written by 70 authors. [13]
There are many lichen species that have been named in honor of Thomas Nash. These include:
Xanthoparmelia nashii Elix & J.Johnst. (1986); [14] Tephromela nashii Kalb (1991); Lecanactis nashii Egea & Torrente (1992); [15] Physcia nashii Moberg (1997); Usnea nashii P.Clerc & Herrera-Camp. (1997); [16] Evicentia nashii Barreno (2000); Harpidium nashii Scheid. (2000); [17] Caloplaca nashii Nav.-Ros., Gaya & Hladún (2001); Cladonia nashii Ahti (2002); Plectocarpon nashii Hafellner (2002); [18] Toninia nashii Timdal (2002); Fusicladium nashicola K.Schub. & U.Braun (2003); [19] Gyalectidium nashii Herrera-Camp. & Lücking (2003); [20] Phaeophyscia nashii Essl. (2004); Buellia nashii Bungartz (2004); Fellhanera nashii van den Boom (2004); Lecanora nashii B.D.Ryan (2004); Lecidella nashiana Knoph & Leuckert (2004); Sticta nashii D.J.Galloway (2004); Aspicilia nashii Owe-Larss. & A.Nordin (2007); Tremella nashii Diederich (2007); [21] Acarospora nashii K.Knudsen (2011); [22] Buellia tomnashiana Giralt & van den Boom (2011); [23] Caloplaca tomnashii S.Y.Kondr., Elix & Kärnefelt 2011); [24] Bulbothrix thomasiana Benatti & Marcelli (2011); [25] Niebla nashii Sipman (2011); [26] Canoparmelia nashii Jungbluth & Marcelli (2011); [25] Punctelia nashii Marcelli & Canêz (2011); [25] Lobariella nashii Moncada & Lücking (2013). [27] The genus Trinathotrema Lücking, Rivas Plata & Mangold (2011) (family Stictidaceae) also honors Nash; it is constructed from parts of his name: tho from Thomas, na from Nash and tri referring to III. [28] Tomnashia S.Y.Kondr. & Hur (2017) (family Teloschistaceae) is another generic eponym. [29]
A comprehensive list of Nash's publication from the period 1971 to 2010 is given in Bates and colleagues' 2011 Festschrift. [12] Some representative publications include:
Roccella is a genus of 23 species of lichens in the family Roccellaceae. The genus was circumscribed by Swiss botanist Augustin Pyramus de Candolle in 1805, with Roccella fuciformis as the type species.
Punctelia is a genus of foliose lichens belonging to the large family Parmeliaceae. The genus, which contains about 50 species, was segregated from genus Parmelia in 1982. Characteristics that define Punctelia include the presence of hook-like to thread-like conidia, simple rhizines, and point-like pseudocyphellae. It is this last feature that is alluded to in the vernacular names speckled shield lichens or speckleback lichens.
André Aptroot is a Dutch mycologist and lichenologist. His primary research focus is on biodiversity, particularly tropical lichens, encompassing systematics, floristic surveys, and taxonomic reviews. A prolific researcher, he has published more than 500 scientific papers and described hundreds of new fungal and lichen species.
Candelariella vitellina is a common and widespread green-yellow to orange-yellow crustose areolate lichen that grows on rock, wood, and bark, all over the world. It grows on non-calcareous rock, wood, and bark.
Xanthoparmelia lineola, commonly known as the tight rock-shield, is a foliose lichen species in the genus Xanthoparmelia. It is a common species with a temperate distribution. Found in North America and South Africa, it grows on rocks.
Josef Hafellner is an Austrian mycologist and lichenologist. He was awarded the Acharius Medal in 2016 for his lifetime contributions to lichenology. Before his retirement, he was a professor at the Karl-Franzens-Universität in Graz. Hafellner started developing an interest in lichens while he was a student at this institution, studying under Josef Poelt. He earned a master's degree in 1975 and a PhD in 1978, defending a doctoral thesis about the genus Karschia. In 2003, Hafellner received his habilitation. By this time, he had studied with French lichenologist André Bellemère (1927–2014) at Saint-Cloud, where he learned techniques of transmission electron microscopy and how their application in studying asci could be used in lichen systematics. His 1984 work Studien in Richtung einer natürlicheren Gliederung der Sammelfamilien Lecanoraceae und Lecideaceae has been described as "probably the single most influential publication in lichen systematics in the latter half of the 20th century".
Rolf Santesson (1916–2013) was a Swedish lichenologist and university lecturer. He was awarded the Acharius Medal in 1992 for his lifetime contributions to lichenology.
Robert "Bob" Shaw Egan is a botanist and lichenologist, specializing in the family Parmeliaceae. He was the president of the American Bryological and Lichenological Society from 1999 to 2001.
Antonín (Toni) Vězda was a Czech lichenologist. After completing a university education that was postponed by World War II, Vězda taught botany at the Czech University of Life Sciences. In 1958, he was dismissed from his university position as a result of the restrictions placed on academic freedoms by the communist regime in power. He eventually was hired as a lichen researcher by the Czechoslovak Academy of Sciences, who allowed him to work from his apartment, which served also as an office and herbarium.
Emmanuël Sérusiaux is a Belgian lichenologist. His career, spanning more than four decades, has combined both lichenology research and political aspects of nature conservation. He spent several periods working as a researcher at the National Fund for Scientific Research and the University of Liège, the latter in which he accepted a faculty position as professor and head of the Plant Taxonomy and Conservation Biology unit. Sérusiaux also served for three non-consecutive appointments as Deputy Chief of Staff in the Government of Wallonia. He retired from both his academic and political positions in 2019.
Punctelia cedrosensis is a species of foliose lichen in the family Parmeliaceae. It is endemic to Mexico, where it grows on the bark of conifers.
Klaus Kalb is a German lichenologist and an authority on tropical lichens. Born in Nuremberg, he studied at the University of Erlangen–Nuremberg before pursuing a career that significantly advanced the field of lichenology, particularly in Brazil. Kalb's work in São Paulo from 1978 to 1981 led to a collaboration with Brazilian lichenologist Marcelo Pinto Marcelli, which is considered a model for non-commercial benefit-sharing in taxonomic research. He later became an associate professor at the University of Regensburg and is known for editing the exsiccata series Lichenes Neotropici. Kalb's contributions to lichenology include over 120 scientific publications, the description of numerous new species, and the development of a substantial lichen collection. His work has been recognised through various honours, including four lichen genera and numerous species named after him, as well as a Festschrift published in 2007 to mark his retirement.
Henricus (Harrie) Johannes Maria Sipman is a retired Dutch lichenologist who specialised in tropical and subtropical lichens and authored or co-authored over 250 scientific publications. He was the curator of the lichen herbarium at the Berlin Botanical Garden and Botanical Museum from 1983 until his retirement in 2010. Between 1990 and 1997 he edited and distributed the exsiccata Lichenotheca Latinoamericana a museo botanico Berolinensi edita.
Candelaria pacifica is a widely distributed corticolous (bark-dwelling), leprose lichen. It was formally described as a species in 2011.
Robert Lücking is a German lichenologist, known for his extensive research on foliicolous lichens and his significant contributions to the taxonomy, ecology, and biodiversity of fungi and lichens. He earned his master's and PhD from the University of Ulm, focusing on foliicolous lichens. He has received numerous awards for his work, including the Mason E. Hale Award for his doctoral thesis, the Augustin Pyramus de Candolle prize for his monograph, and the Tuckerman Award twice for his publications in the scientific journal The Bryologist.
Roccella gracilis is a species of fruticose lichen in the family Roccellaceae. Flourishing in coastal environments, Roccella gracilia predominantly grows along the coasts of Baja California and the Galápagos Islands, preferring the trunks, branches, and twigs of trees, but it is also found on rocks and cliffs. Its distribution spans coastal habitats from California south to Peru, including the Galápagos Islands and parts of the Caribbean.
Buellia nashii is a species of lichen characterized by its crustose thallus, typically found in the Sonoran Desert Region and adjacent areas. It was first described by Bungartz et al. The species is named in honor of Dr. Thomas H. Nash III, a notable lichenologist and the Ph.D. supervisor of the author.
Dirinaria confluens is a species of foliose lichen belonging to the genus Dirinaria within the family Caliciaceae. It was originally described by D.D.Awasthi in 1975.
Dirinaria picta is a species of lichen within the family Caliciaceae, classified under the order Caliciales in the class Lecanoromycetes of the division Ascomycota.