Robert T. Paine (zoologist)

Robert Treat "Bob" Paine III (April 13, 1933 – June 13, 2016) was an American ecologist, who spent most of his career at the University of Washington. Paine coined the keystone species concept to explain the relationship between Pisaster ochraceus, a species of starfish, and Mytilus californianus, a species of mussel. Paine's research, and the subsequent work of his students, has been hugely influential in the field of ecology.

Paine was born on April 13, 1933 and grew up in Cambridge, Massachusetts, and was fascinated by biology from a very young age. After graduating from Harvard University in 1954, he served in the U.S. Army where he was the battalion gardener. Paine later entered graduate school at the University of Michigan intending to study paleontology. After he took some courses in zoology and ecology at Michigan, his interests and studies changed after taking a course about freshwater invertebrates taught by ecologist Frederick E. Smith. Upon graduating from the University of Michigan, Paine completed a one-year post-doctoral fellowship at the Scripps Institution of Oceanography. In 1962, Paine joined the University of Washington where he spent the rest of his career and became well known for his work.

Paine's doctoral research thesis was on the ecology of living brachipods. As a postdoctoral fellow, he worked on the history and energetics of opisthobranchs (marine gastropods). Much of Paine's work at the University of Washington focused on the organization of marine communities. It was here that much of his research on keystone species occurred.

In a classic 1966 paper, Paine described a rocky intertidal ecosystem in Makah Bay in Washington State, where top predator species help maintain biodiversity. This led to his 1969 paper in which he proposed the keystone species concept. This concept states that an ecosystem may experience a dramatic shift if a keystone species is removed, even though that species was a small part of the ecosystem by measures of biomass or productivity. It has become a very popular concept in conservation biology. Paine also coined the term "trophic cascade" to describe the top-down effects that occur in ecosystems when an important species is introduced or removed.

Paine retired in the late 1990s, but continued to be active as a professor emeritus at the University of Washington. In 2000, he founded the Experimental and Field Ecology Fund to support graduate student research; the fund was renamed the Robert T. Paine Experimental & Field Ecology Endowed Fund to mark Paine's 80th birthday. As late as 2013, aged 79, Paine continued to make regular visits to Tatoosh Island for research purposes.

In 2013, he was awarded the International Cosmos Prize, including a cash prize equivalent to about US$408,000. Paine died from acute myeloid leukemia, a type of blood cancer, at the Swedish Medical Center in Seattle, Washington on June 13, 2016.

Paine's research—and the subsequent work of his students—has been very influential in the field of ecology, and he has been called a "giant" of the field. Paine's research helped popularise field manipulation experiments, sometimes called "kick-it-and-see ecology", at a time when field ecologists tended only to observe natural ecosystems. Ed Yong wrote that, "by encouraging independence and prizing fieldwork, Paine mentored an entire generation of superstar ecologists." Paine's students and post-docs include Paul Dayton, Bruce Menge and Jane Lubchenco.

• Vice-President, Ecological Society of America, 1977–1978
• President, Ecological Society of America, 1979–1980
• Robert H. MacArthur Award, Ecological Society of America, 1983
• Elected to The National Academy of Sciences, 1986
• Sewall Wright Award, 1996
• American Society of Naturalists Honorary Lifetime Membership Award, 2009
• International Cosmos Prize, 2013

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• Robert T. Paine (1983) "Ecological Determinism in the Competition for Space: The Robert H. MacArthur Award Lecture" Ecology, 65: 1339-1348.
• Robert H. MacArthur Award, Ecological Society of America, 30 January 2014. Retrieved 15 June 2016.
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• Katherine Long (2013) "Retired UW prof wins $408,000 for groundbreaking ecology work" Seattle Times, 2 August 2013. Retrieved 15 June 2016.