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Stephen Blair Hedges

February 24, 2023

Stephen Blair Hedges (known as S. Blair Hedges) is Laura H. Carnell Professor of Science and director of the Center for Biodiversity at Temple University where he researches the tree of life and leads conservation efforts in Haiti and elsewhere. He co-founded Haiti National Trust.

Stephen Hedges

Career

Hedges has a Bachelor of Science undergraduate degree from George Mason University, and a Masters and Ph.D. in Zoology from the University of Maryland, supervised by Richard Highton.[1] Before he joined Temple University in 2014, he was a professor at Penn State.[1][2] He is also a founding member of the NASA Astrobiology Center. He has published over 300 peer-reviewed works including 10 books and monographs.[3] He was elected as a fellow of the American Association for the Advancement of Science in 2009 for "revealing connections between biological evolution and Earth history in diverse groups of organisms",[4] and was awarded the 2011 Penn State Faculty Scholar Medal for Outstanding Achievement in the Life and Health Sciences.[5] A Cuban butterfly (Leptodes hedgesi Schwartz & Johnson 1992), Cuban frog (Eleutherodactylus blairhedgesi Estrada, Diaz, & Rodriguez 1997), and Cuban millipede (Amphelictogon blairi Perez-Asso 1998) have been named in his honor.

Research

Hedges has studied the relationships and timing of major groups in the tree of life using genomic data.[1] This research has led to a number of discoveries including an early origin for the orders of placental mammals and modern birds,[6][7] estimates of when prokaryotes and eukaryotes first colonized land and its relevance for the planet,[8][9] and the phylogenetic relationships of reptiles and insectivorous mammals.[10][11][12][13] He has coined the word timetree for a phylogenetic tree scaled to time, co-founded the TimeTree database for exploring the time-scale of the tree of life, and co-edited the book Timetree of Life.[14] Hedges and his team produced a spiral tree of life in 2015 to visualize the relationships over time of 50,000 species, and discovered that diversification and speciation are both relatively constant through time and among groups.[15]

Hedges also has a field program in the Caribbean where he has studied the evolution and biogeography of amphibians and reptiles with genetic data and maintained a database of information on these species, Caribherp. He discovered many new species in his work and has so far named 135 species of reptiles, amphibians, and butterflies. He also described three of the smallest species of reptiles and amphibians, including the Monte Iberia dwarf frog (Eleutherodactylus iberia),[16] Jaragua gecko (Sphaerodactylus ariasae), and the Barbados threadsnake (Tetracheilostoma carlae). Twelve articles in the New York Times have described his research.[17]

Conservation

Work by Hedges and his team in Haiti has defined hot spots of biodiversity leading to the establishment of three national parks in Haiti. He also initiated a captive breeding program to conserve ten endangered species of frog at the Philadelphia Zoo.[18] Together with Haitian CEO Philippe Bayard, he founded Haiti National Trust, an environmental protection NGO.

Personal life

Hedges is interested in Renaissance art, which led him to conduct several scientific studies of early artwork, including the development of a method for dating old prints[19] and a study on the historical biogeography of beetles based on the holes they bored in old books.[20]

References

  1. ^ a b c "Hedges Lab - Evolutionary Biology". www.hedgeslab.org. Retrieved 2017-04-20.
  2. ^ "Meet CST'S New Faculty Members". College of Science and Technology, Temple University. 2014. Retrieved March 20, 2015.
  3. ^ "Blair Hedges awarded Faculty Scholar Medal". Department of Biology, Penn State. March 17, 2011. Retrieved March 20, 2015.
  4. ^ "AAAS Members Elected as Fellows". AAAS. December 18, 2009. Retrieved March 20, 2015.
  5. ^ "Blair Hedges awarded Faculty Scholar Medal — Penn State University Department of Biology". bio.psu.edu. Retrieved 2017-04-20.
  6. ^ Hedges, S. B.; Parker, P. H.; Sibley, C. G.; Kumar, S. (1996-05-16). "Continental breakup and the ordinal diversification of birds and mammals". Nature. 381 (6579): 226–229. Bibcode:1996Natur.381..226H. doi:10.1038/381226a0. ISSN 0028-0836. PMID 8622763. S2CID 4328989.
  7. ^ Kumar, S.; Hedges, S. B. (1998-04-30). "A molecular timescale for vertebrate evolution". Nature. 392 (6679): 917–920. Bibcode:1998Natur.392..917K. doi:10.1038/31927. ISSN 0028-0836. PMID 9582070. S2CID 205001573.
  8. ^ Battistuzzi, Fabia U.; Hedges, S. Blair (2009-02-01). "A major clade of prokaryotes with ancient adaptations to life on land". Molecular Biology and Evolution. 26 (2): 335–343. doi:10.1093/molbev/msn247. ISSN 1537-1719. PMID 18988685.
  9. ^ Heckman, D. S.; Geiser, D. M.; Eidell, B. R.; Stauffer, R. L.; Kardos, N. L.; Hedges, S. B. (2001-08-10). "Molecular evidence for the early colonization of land by fungi and plants". Science. 293 (5532): 1129–1133. doi:10.1126/science.1061457. ISSN 0036-8075. PMID 11498589. S2CID 10127810.
  10. ^ Hedges, S. B.; Poling, L. L. (1999-02-12). "A molecular phylogeny of reptiles". Science. 283 (5404): 998–1001. Bibcode:1999Sci...283..998B. doi:10.1126/science.283.5404.998. ISSN 0036-8075. PMID 9974396.
  11. ^ Vidal, Nicolas; Hedges, S. Blair (2005-10-01). "The phylogeny of squamate reptiles (lizards, snakes, and amphisbaenians) inferred from nine nuclear protein-coding genes". Comptes Rendus Biologies. 328 (10–11): 1000–1008. doi:10.1016/j.crvi.2005.10.001. ISSN 1631-0691. PMID 16286089.
  12. ^ Stanhope, Michael J.; Waddell, Victor G.; Madsen, Ole; de Jong, Wilfried; Hedges, S. Blair; Cleven, Gregory C.; Kao, Diana; Springer, Mark S. (1998-08-18). "Molecular evidence for multiple origins of Insectivora and for a new order of endemic African insectivore mammals". Proceedings of the National Academy of Sciences of the United States of America. 95 (17): 9967–9972. Bibcode:1998PNAS...95.9967S. doi:10.1073/pnas.95.17.9967. ISSN 0027-8424. PMC 21445. PMID 9707584.
  13. ^ Fry, Bryan G.; Vidal, Nicolas; Norman, Janette A.; Vonk, Freek J.; Scheib, Holger; Ramjan, S. F. Ryan; Kuruppu, Sanjaya; Fung, Kim; Hedges, S. Blair (2006-02-02). "Early evolution of the venom system in lizards and snakes". Nature. 439 (7076): 584–588. Bibcode:2006Natur.439..584F. doi:10.1038/nature04328. ISSN 1476-4687. PMID 16292255. S2CID 4386245.
  14. ^ Blair., Hedges, S.; Kumar, Sudhir (2009-01-01). The timetree of life. Oxford University Press. ISBN 978-0199535033. OCLC 268792961.
  15. ^ Hedges, S. Blair; Marin, Julie; Suleski, Michael; Paymer, Madeline; Kumar, Sudhir (2017-04-20). "Tree of Life Reveals Clock-Like Speciation and Diversification". Molecular Biology and Evolution. 32 (4): 835–845. arXiv:1412.4312. doi:10.1093/molbev/msv037. ISSN 0737-4038. PMC 4379413. PMID 25739733.
  16. ^ Fountain, Henry (3 December 1996). "Under Cuban Ferns, A Very Small Frog". The New York Times.
  17. ^ "Hedges Lab - New York Times news articles".
  18. ^ Mihelich, Peggy (January 4, 2012). "Blair Hedges is saving Haiti's endangered frogs". AAAS MemberCentral. Retrieved March 20, 2015.
  19. ^ O'Connell, Frank (July 25, 2006). "SCIENCE ILLUSTRATED; Old, but Just How Old? Making Early Prints Give Up Their Secrets". New York Times. Retrieved October 3, 2016.
  20. ^ Bhanoo, Sindya (November 26, 2012). "In Art Prints, Clues to Beetles in Europe". New York Times. Retrieved October 3, 2016.

External links

  • Official website

February 24, 2023
stephen, blair, hedges, known, blair, hedges, laura, carnell, professor, science, director, center, biodiversity, temple, university, where, researches, tree, life, leads, conservation, efforts, haiti, elsewhere, founded, haiti, national, trust, stephen, hedge. Stephen Blair Hedges known as S Blair Hedges is Laura H Carnell Professor of Science and director of the Center for Biodiversity at Temple University where he researches the tree of life and leads conservation efforts in Haiti and elsewhere He co founded Haiti National Trust Stephen Hedges Contents 1 Career 1 1 Research 1 2 Conservation 2 Personal life 3 References 4 External linksCareer EditHedges has a Bachelor of Science undergraduate degree from George Mason University and a Masters and Ph D in Zoology from the University of Maryland supervised by Richard Highton 1 Before he joined Temple University in 2014 he was a professor at Penn State 1 2 He is also a founding member of the NASA Astrobiology Center He has published over 300 peer reviewed works including 10 books and monographs 3 He was elected as a fellow of the American Association for the Advancement of Science in 2009 for revealing connections between biological evolution and Earth history in diverse groups of organisms 4 and was awarded the 2011 Penn State Faculty Scholar Medal for Outstanding Achievement in the Life and Health Sciences 5 A Cuban butterfly Leptodes hedgesi Schwartz amp Johnson 1992 Cuban frog Eleutherodactylus blairhedgesi Estrada Diaz amp Rodriguez 1997 and Cuban millipede Amphelictogon blairi Perez Asso 1998 have been named in his honor Research Edit Hedges has studied the relationships and timing of major groups in the tree of life using genomic data 1 This research has led to a number of discoveries including an early origin for the orders of placental mammals and modern birds 6 7 estimates of when prokaryotes and eukaryotes first colonized land and its relevance for the planet 8 9 and the phylogenetic relationships of reptiles and insectivorous mammals 10 11 12 13 He has coined the word timetree for a phylogenetic tree scaled to time co founded the TimeTree database for exploring the time scale of the tree of life and co edited the book Timetree of Life 14 Hedges and his team produced a spiral tree of life in 2015 to visualize the relationships over time of 50 000 species and discovered that diversification and speciation are both relatively constant through time and among groups 15 Hedges also has a field program in the Caribbean where he has studied the evolution and biogeography of amphibians and reptiles with genetic data and maintained a database of information on these species Caribherp He discovered many new species in his work and has so far named 135 species of reptiles amphibians and butterflies He also described three of the smallest species of reptiles and amphibians including the Monte Iberia dwarf frog Eleutherodactylus iberia 16 Jaragua gecko Sphaerodactylus ariasae and the Barbados threadsnake Tetracheilostoma carlae Twelve articles in the New York Times have described his research 17 Conservation Edit Work by Hedges and his team in Haiti has defined hot spots of biodiversity leading to the establishment of three national parks in Haiti He also initiated a captive breeding program to conserve ten endangered species of frog at the Philadelphia Zoo 18 Together with Haitian CEO Philippe Bayard he founded Haiti National Trust an environmental protection NGO Personal life EditHedges is interested in Renaissance art which led him to conduct several scientific studies of early artwork including the development of a method for dating old prints 19 and a study on the historical biogeography of beetles based on the holes they bored in old books 20 References Edit a b c Hedges Lab Evolutionary Biology www hedgeslab org Retrieved 2017 04 20 Meet CST S New Faculty Members College of Science and Technology Temple University 2014 Retrieved March 20 2015 Blair Hedges awarded Faculty Scholar Medal Department of Biology Penn State March 17 2011 Retrieved March 20 2015 AAAS Members Elected as Fellows AAAS December 18 2009 Retrieved March 20 2015 Blair Hedges awarded Faculty Scholar Medal Penn State University Department of Biology bio psu edu Retrieved 2017 04 20 Hedges S B Parker P H Sibley C G Kumar S 1996 05 16 Continental breakup and the ordinal diversification of birds and mammals Nature 381 6579 226 229 Bibcode 1996Natur 381 226H doi 10 1038 381226a0 ISSN 0028 0836 PMID 8622763 S2CID 4328989 Kumar S Hedges S B 1998 04 30 A molecular timescale for vertebrate evolution Nature 392 6679 917 920 Bibcode 1998Natur 392 917K doi 10 1038 31927 ISSN 0028 0836 PMID 9582070 S2CID 205001573 Battistuzzi Fabia U Hedges S Blair 2009 02 01 A major clade of prokaryotes with ancient adaptations to life on land Molecular Biology and Evolution 26 2 335 343 doi 10 1093 molbev msn247 ISSN 1537 1719 PMID 18988685 Heckman D S Geiser D M Eidell B R Stauffer R L Kardos N L Hedges S B 2001 08 10 Molecular evidence for the early colonization of land by fungi and plants Science 293 5532 1129 1133 doi 10 1126 science 1061457 ISSN 0036 8075 PMID 11498589 S2CID 10127810 Hedges S B Poling L L 1999 02 12 A molecular phylogeny of reptiles Science 283 5404 998 1001 Bibcode 1999Sci 283 998B doi 10 1126 science 283 5404 998 ISSN 0036 8075 PMID 9974396 Vidal Nicolas Hedges S Blair 2005 10 01 The phylogeny of squamate reptiles lizards snakes and amphisbaenians inferred from nine nuclear protein coding genes Comptes Rendus Biologies 328 10 11 1000 1008 doi 10 1016 j crvi 2005 10 001 ISSN 1631 0691 PMID 16286089 Stanhope Michael J Waddell Victor G Madsen Ole de Jong Wilfried Hedges S Blair Cleven Gregory C Kao Diana Springer Mark S 1998 08 18 Molecular evidence for multiple origins of Insectivora and for a new order of endemic African insectivore mammals Proceedings of the National Academy of Sciences of the United States of America 95 17 9967 9972 Bibcode 1998PNAS 95 9967S doi 10 1073 pnas 95 17 9967 ISSN 0027 8424 PMC 21445 PMID 9707584 Fry Bryan G Vidal Nicolas Norman Janette A Vonk Freek J Scheib Holger Ramjan S F Ryan Kuruppu Sanjaya Fung Kim Hedges S Blair 2006 02 02 Early evolution of the venom system in lizards and snakes Nature 439 7076 584 588 Bibcode 2006Natur 439 584F doi 10 1038 nature04328 ISSN 1476 4687 PMID 16292255 S2CID 4386245 Blair Hedges S Kumar Sudhir 2009 01 01 The timetree of life Oxford University Press ISBN 978 0199535033 OCLC 268792961 Hedges S Blair Marin Julie Suleski Michael Paymer Madeline Kumar Sudhir 2017 04 20 Tree of Life Reveals Clock Like Speciation and Diversification Molecular Biology and Evolution 32 4 835 845 arXiv 1412 4312 doi 10 1093 molbev msv037 ISSN 0737 4038 PMC 4379413 PMID 25739733 Fountain Henry 3 December 1996 Under Cuban Ferns A Very Small Frog The New York Times Hedges Lab New York Times news articles Mihelich Peggy January 4 2012 Blair Hedges is saving Haiti s endangered frogs AAAS MemberCentral Retrieved March 20 2015 O Connell Frank July 25 2006 SCIENCE ILLUSTRATED Old but Just How Old Making Early Prints Give Up Their Secrets New York Times Retrieved October 3 2016 Bhanoo Sindya November 26 2012 In Art Prints Clues to Beetles in Europe New York Times Retrieved October 3 2016 External links EditOfficial website Retrieved from https en wikipedia org w index php title Stephen Blair Hedges amp oldid 1122054869, wikipedia, wiki, book, books, library,

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