Nelson Hairston
Encyclopedia
Nelson Hairston Sr. was a preeminent ecologist
Ecology
Ecology is the scientific study of the relations that living organisms have with respect to each other and their natural environment. Variables of interest to ecologists include the composition, distribution, amount , number, and changing states of organisms within and among ecosystems...

 of the 20th century. Hairston is well-known for his work in ecology
Ecology
Ecology is the scientific study of the relations that living organisms have with respect to each other and their natural environment. Variables of interest to ecologists include the composition, distribution, amount , number, and changing states of organisms within and among ecosystems...

 and human disease. In the field of ecology he is famous for championing the idea of the trophic cascade
Trophic cascade
Trophic cascades occur when predators in a food web suppress the abundance of their prey, thereby releasing the next lower trophic level from predation...

, on which he published the provocative “Green World Hypothesis” with colleagues Frederick E. Smith and Lawrence B. Slobodkin
Lawrence B. Slobodkin
Lawrence B. Slobodkin was an American ecologist and Professor Emeritus at the Department of Ecology and Evolution, Stony Brook University, State University of New York. He was one of the leading pioneers of modern ecology...

. Nelson was also deeply interested in the factors that control human disease and was an adviser to the World Health Organization
World Health Organization
The World Health Organization is a specialized agency of the United Nations that acts as a coordinating authority on international public health. Established on 7 April 1948, with headquarters in Geneva, Switzerland, the agency inherited the mandate and resources of its predecessor, the Health...

 for many years.

Early life

Nelson was born on October 16, 1917 in the Cooleemee area of Davie County, North Carolina
Davie County, North Carolina
- Wine region :Portions of Davie County are located in the Yadkin Valley AVA, an American Viticultural Area. Wines made from grapes grown in the Yadkin Valley AVA may use the appellation Yadkin Valley on their labels.-Demographics:...

. He was the second of two boys to Margaret George Hairston (1884-1963) and Peter Hairston (1841-1975). The Hairstons owned plantations all around Henry County, Virginia
Henry County, Virginia
As of the census of 2000, there were 57,930 people, 23,910 households, and 16,952 families residing in the county. The population density was 152 people per square mile . There were 25,921 housing units at an average density of 68 per square mile...

, Pittsylvania County, Virginia
Pittsylvania County, Virginia
As of the census of 2000, there were 61,745 people, 24,684 households, and 18,216 families residing in the county. The population density was 64 people per square mile . There were 28,011 housing units at an average density of 29 per square mile...

, North Carolina, and Lowndes County, Mississippi
Lowndes County, Mississippi
As of the census of 2000, there were 61,586 people, 22,849 households, and 16,405 families residing in the county. The population density was 123 people per square mile . There were 25,104 housing units at an average density of 50 per square mile...

. He was born on the Cooleemee
Cooleemee
Cooleemee, also known as the Cooleemee Plantation House, is a house located between Mocksville and Lexington, North Carolina, at the terminus of SR 1812 on the Yadkin River in Davie County, North Carolina. It is a U.S...

 Plantation, which was built by his grandfather, Peter Wilson Hairston (1819-1886).

Early career

Nelson was interested in ecology from an early age. He graduated from the department of Zoology at the University of North Carolina
University of North Carolina
Chartered in 1789, the University of North Carolina was one of the first public universities in the United States and the only one to graduate students in the eighteenth century...

 with both a BS and MS. Hairston continued his studies at Northwestern University
Northwestern University
Northwestern University is a private research university in Evanston and Chicago, Illinois, USA. Northwestern has eleven undergraduate, graduate, and professional schools offering 124 undergraduate degrees and 145 graduate and professional degrees....

 under the supervision of Dr. Orlando Park. His PhD was interrupted by War World II, where he served his country by helping treat and prevent the transmission of malaria in the South Pacific. After the war, Nelson returned to his PhD, which was on the distribution of salamanders in Appalachia. These early experiences with studying the ecology of salamanders and the treatment of disease began his lifelong interest in the ecology and prevention of disease.

Professor of Zoology

Hairston spent most of his career (27 years) as a professor of Zoology at the University of Michigan
University of Michigan
The University of Michigan is a public research university located in Ann Arbor, Michigan in the United States. It is the state's oldest university and the flagship campus of the University of Michigan...

 and director of their Museum of Zoology. During this time Nelson helped to make the University of Michigan
University of Michigan
The University of Michigan is a public research university located in Ann Arbor, Michigan in the United States. It is the state's oldest university and the flagship campus of the University of Michigan...

 one of the United States preeminent graduate programs in ecology. Afterwards he spent 12 years as a professor at the University of North Carolina as a Kenan Professor of Biology. Throughout Hairston’s career, he focused most of his work on the role trophic interactions, such as the trophic cascade
Trophic cascade
Trophic cascades occur when predators in a food web suppress the abundance of their prey, thereby releasing the next lower trophic level from predation...

, has on determining the species composition of communities of co-existing organisms.

Adviser to the UN’s World Health Organization

Hairston’s work on human disease was equally controversial. Nelson, along with a handful of other colleagues, championed the idea that disease was an ecological problem that could be solved by understanding the ecology of germs and how we interact with our ecosystems. This once controversial view is now well accepted by epidemiologists
Epidemiology
Epidemiology is the study of health-event, health-characteristic, or health-determinant patterns in a population. It is the cornerstone method of public health research, and helps inform policy decisions and evidence-based medicine by identifying risk factors for disease and targets for preventive...

 and others in the health profession. Hairston’s views on disease treatment and management were applied through the UN’s World Health Organization, where he served as an adviser on schistosomiasis
Schistosomiasis
Schistosomiasis is a parasitic disease caused by several species of trematodes , a parasitic worm of the genus Schistosoma. Snails often act as an intermediary agent for the infectious diseases until a new human host is found...

 in countries throughout Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

, the Middle East
Middle East
The Middle East is a region that encompasses Western Asia and Northern Africa. It is often used as a synonym for Near East, in opposition to Far East...

, Africa
Africa
Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

, and the South Pacific
Oceania
Oceania is a region centered on the islands of the tropical Pacific Ocean. Conceptions of what constitutes Oceania range from the coral atolls and volcanic islands of the South Pacific to the entire insular region between Asia and the Americas, including Australasia and the Malay Archipelago...

.

Retirement

Hairston retired at the age of 69. Despite retiring, Hairston remained an active and engaged scientist. Post retirement he published three books, including, “Ecological Experiments”, which was translated into several different languages. During this time Hairston was also nominated to the American Academy of Arts and Sciences and was given the Eminent Ecologist Award by the Ecological Society of America.
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