astronomy

H. Ronald Pulliam

H. Ronald Pulliam is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand H. Ronald Pulliam rather than just read about it. In short: H. Ronald Pulliam is an American ecologist and conservation biologist noted for his contributions to theoretical and applied ecology, including the development of the source–sink theory and advances in foraging theory.

Key takeaways

H. Ronald Pulliam belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect H. Ronald Pulliam to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of H. Ronald Pulliam from memory before moving on to harder problems.

Reference excerpt

H. Ronald Pulliam is an American ecologist and conservation biologist noted for his contributions to theoretical and applied ecology, including the development of the source–sink theory and advances in foraging theory. He is Regents Professor Emeritus at the Eugene P. Odum School of Ecology at the University of Georgia and the founder of the Borderlands Restoration Network and Wildlife Corridors, initiatives dedicated to restoring and conserving ecological connectivity in the U.S.–Mexico borderlands.

Early life and education Pulliam earned his Bachelor of Science in zoology from the University of Georgia in 1968 and his Ph.D. in ecology from Duke University in 1970, where he studied with Peter H. Klopfer. He then completed a National Science Foundation postdoctoral fellowship with Richard Lewontin at the University of Chicago (1970–1971).

Academic career Pulliam began his academic career at the University of Arizona in 1971, joining the Department of Zoology, and later established the Department of Ecology and Evolutionary Biology there, as well as serving on the faculty of Applied mathematics. He spent a sabbatical year with evolutionary biologist John Maynard Smith at Sussex University (1977–1978). On his return from the UK, Pulliam served as head ecologist at the Museum of Northern Arizona, held professorships at the State University of New York (SUNY-Albany) and the University of Georgia. There, he directed the Institute of Ecology from 1987 to 1993 and was appointed Regents Professor in 1997. From 1993 to 1996, Pulliam served as Director of the National Biological Service within the United States Department of the Interior, where he worked to integrate ecological research into federal environmental management. He later served as Science Advisor to the United States Secretary of the Interior (1996–1997). In addition, he has served on numerous editorial boards, including Ecology, Ecological Monographs, and Ecological Applications.

Research contributions Pulliam is best known for his pioneering work on optimal foraging theory and source–sink population dynamics, both of which have had impacts on theoretical and applied ecology. His 1988 paper “Sources, Sinks, and Population Regulation” in The American Naturalist introduced a framework that reshaped the understanding of population ecology and landscape conservation. Earlier, his work with Eric Charnov and Graham Pyke on Optimal Foraging: A Selected Review of Theory and Tests (1977) became a foundational reference in behavioral ecology. In addition to his theoretical contributions, Pulliam has written extensively on conservation biology, sustainable landscapes, and the interface between ecology and public policy. His research integrates population dynamics, habitat selection, and ecosystem management across spatial scales.

Conservation leadership In 2013, he founded the Borderlands Restoration Network (BRN) in Patagonia, Arizona, a collaborative non-profit dedicated to ecological restoration in the Madrean Sky Islands region. As Managing Partner of Wildlife Corridors since 2011, he has promoted the restoration of habitat connectivity and community-based conservation along the U.S.–Mexico borderlands. His leadership in this field earned him the 2023 Buddy Amos Founders Award from the Community Foundation for Southern Arizona.

Professional service Pulliam has served as President (1991–1992) and Vice President (1986–1987) of the Ecological Society of America. He has also been a trustee of the Georgia Conservancy, Vice President for Global Change Studies at the Southeastern Universities Research Association, and chair or member of numerous governmental and scientific advisory committees, including the U.S. Office of Science and Technology Policy Committee on Environment and Natural Resources, and the boards of Defenders of Wildlife, NatureServe, and the National Council for Science and the Environment.

Awards and honors Buddy Amos Founders Award, Community Foundation for Southern Arizona (2023) Distinguished Landscape Ecologist Award, International Association for Landscape Ecology (2005) Distinguished Service Award, Ecological Society of America (2002) Regents Professor, University of Georgia (1997) Earl Greene Award, Georgia Ornithological Society

Selected publications Pulliam, H. R. (1973). "On the Advantages of Flocking." Journal of Theoretical Biology, 38(2): 419–422. Pyke, G. H., Pulliam, H. R., & Charnov, E. L. (1977). "Optimal Foraging: A Selected Review of Theory and Tests." Quarterly Review of Biology, 52: 137–154. Pulliam, H. R. (1988). "Sources, Sinks, and Population Regulation." The American Naturalist, 135: 652–661. Pulliam, H. R., & Dunning, J. B. (1994). "Demographic Processes: Population Dynamics on Heterogeneous Landscapes." In Principles of Conservation Biology. Sinauer Associates. Pulliam, H. R. (2000). "On the Relationship Between Niche and Distribution." Ecology Letters, 3: 349–361. Diez, J. M., Giladi, I., Warren, R., & Pulliam, H. R. (2014). "Probabilistic and Spatially Variable Niches Inferred from Demography." Journal of Ecology, 102(2): 544–554. Norman, L. M., Girard, M., Pulliam, H. R., et al. (2020). "Combining the Science and Practice of Restoration Ecology." Air, Soil and Water Research, 14: 1–9.

References

Worked examples

Example 1 — a first encounter with H. Ronald Pulliam

Start with the simplest possible case. Write down what H. Ronald Pulliam claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to H. Ronald Pulliam before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about H. Ronald Pulliam ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of H. Ronald Pulliam

In research: H. Ronald Pulliam appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses H. Ronald Pulliam in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: H. Ronald Pulliam is common in secondary-school and first-year university syllabi. It links to neighbouring topics American conservation biologists, American conservationists, American ecologists, so understanding it makes those chapters shorter.
In everyday life: Look for H. Ronald Pulliam outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study H. Ronald Pulliam in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what H. Ronald Pulliam means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain H. Ronald Pulliam out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is H. Ronald Pulliam in simple terms?

Why does H. Ronald Pulliam matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study H. Ronald Pulliam?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on H. Ronald Pulliam.