A leading pioneer in long-term multidisciplinary ecological studies, Likens examines energy flow and biogeochemical flux models in the ecosystems of forests, streams and lakes. Likens is best known for leading the team of scientists that discovered acid rain in North America, and connected fossil fuels with increasing acidity of precipitation.[1][2] In addition to its scientific impact, this work has influenced public debate and governmental policy, particularly the United States Congress's Clean Air Act Amendments of 1990.[3]
In 1988, Hubbard Brook was designated by the National Science Foundation as an LTER, a site for collaborative long term ecological research.[3][11][14] In 2005, Hubbard Brook celebrated 50 years of research at the site.[11] Likens' work in the area is considered "one of the world’s most comprehensive studies on how air pollution and land use shape forested watersheds".[3] Work at Mirror Lake, at the lower end of the Hubbard Brook Valley, has been particularly important in understanding the importance of physical, chemical, and biological linkages involving the lake and its watershed and airshed.[15] Liken has extensively studied biogeochemical cycles describing the flow of matter within ecosystems.[16]Riparian zones linking water and land are particularly important in maintaining the health of wild lands.[17] Liken has also done important work on deforestation and its potential impact on the chemistry of watersheds. This research has had significant impacts on programs for forest management, in particular the United States Forest Service's adoption of a 100–year rotation policy.[2][18]
Likens and others devised a range of highly influential long-term experiments on an ecosystemic scale. These include the small-watershed model of nutrient cycling, in which all water entering and leaving a naturally-bounded watershed is measured, enabling scientists to calculate the hydrologic budget of the watershed.[11] This model has been "extremely influential" in the examination of ecosystems, and is central to the examination of urban ecosystems such as Baltimore.[19] Likens' work is considered "classic",[1][19] and he is credited with establishing a "guiding paradigm" for other ecologists.[1]
Cornell University
In 1969, Likens joined the faculty of Cornell University. He served as an associate professor from 1969 to 1972, and as a full professor from 1972 to 1983.[1] In addition to being a professor of ecology in the Section of Ecology and Systematics (later named the Department of Ecology & Evolutionary Biology), he served as its acting chairman (1973-1974) and chairman (1982-1983).[20][21] In January 1983 he was named Cornell University's Charles A. Alexander Professor of Biological Sciences. While at Cornell University, he served as chairman of the Section of Ecology and Systematics.[22]
In 1983 Likens founded the (now Cary) Institute of Ecosystem Studies in Millbrook, New York as part of the New York Botanical Garden. In 1993, the IES became an independent non-profit with Likens as director and president. Situated at the Mary Flagler Cary Arboretum,[1] it is an independent center for ecological research, "whose work is highly relevant to policy concerns."[23] In addition to managing teams of scientists and educators, Likens continued his research at Hubbard Brook each summer.[2] As of 2001, he was appointed to the first endowed chair at the Institute of Ecosystem Studies, the G. Evelyn Hutchinson Chair in Ecology.[1]
In 2007 Likens stepped down as director of the IES and returned to full-time research, currently at the University of Connecticut and as visiting professor at the University of Uppsala, Sweden. In July 2012 he began a three-year term as special adviser to the president of the University of Connecticut on environmental affairs and distinguished research professor.[22]
Likens has published 25 books and more than 580 papers and book chapters.[3] Much of his early work is summarized in U.S. Geological Survey publications.[24] His work has influenced the United States Congress on issues such as the Clean Air Act Amendments of 1990.[3]
He has been active in a variety of organizations, and has been the vice-president (1975-1976) and president (1976-1977) of the American Society of Limnology and Oceanography; vice-president (1978-1979), president (1981-1982) and honorary Fellow (2012) of the Ecological Society of America; president (2002) of the American Institute of Biological Sciences; and president (2001-2007) of the International Society of Limnology.[20][21]
He has been awarded honorary doctoral degrees internationally (Universität für Bodenkultur, Vienna, 1992; Wageningen Agricultural University, The Netherlands, 1998) as well as nationally (Manchester College, 1979; Rutgers University, 1985; Plymouth State College, University System of New Hampshire, 1989; Miami University, 1990; Union College, 1991; Marist College, 1993; University of Connecticut, 2004; Montclair State University, 2012).[21]
He has won the BBVA Foundation Frontiers of Knowledge Award (2016) jointly with Marten Scheffer for contributing decisively to what the jury describes as “one of the major challenges” of this scientific discipline: to understand and, where possible, anticipate ecosystem responses to human-induced alterations of the natural environment.
In 2018 Likens was awarded an honorary doctorate from Uppsala University, Sweden.[28]
Family
Gene Likens and his wife Phyllis Irene Craig Likens (1951–2014) of Clinton Corners, New York have three daughters, Heather, Leslie, and Kathy, and a son, Gregory. Phyllis also worked at Cornell University and the Institute of Ecosystem Studies and contributed significantly to the Hubbard Brook Ecosystem Study. He has seven grandchildren, Sierra, Maxwell, Samuel, Joseph, Noah, Louis, and Jason.[29]
^Jeschke, Jonathan M. (September 25, 2009). "Likens, Gene E."The Encyclopedia of Earth.
^"Gene Likens Collection, MC2002/188 and MC2002/188b". Manchester University Archives and Brethren Historical Collection. Funderburg Library, Manchester University, North Manchester, Indiana. Retrieved December 9, 2015.
^Decamps, H.; Naiman, R.J.; McClain, M.E. (2010). "Riparian zones". In Likens, Gene E. (ed.). River ecosystem ecology : a global perspective : a derivative of Encyclopedia of inland waters. San Diego, CA: Academic Press. pp. 182–189. ISBN9780123819987. Retrieved December 15, 2015.