Squirrels are members of the family Sciuridae, a family that includes small or medium-sized rodents. The squirrel family includes tree squirrels, ground squirrels, and flying squirrels. Squirrels are indigenous to the Americas, Eurasia, and Africa, and were introduced by humans to Australia. The earliest known fossilized squirrels date from the Eocene epoch, and among other living rodent families, the squirrels are most closely related to the mountain beaver and dormice.
Theoretical ecology is the scientific discipline devoted to the study of ecological systems using theoretical methods such as simple conceptual models, mathematical models, computational simulations, and advanced data analysis. Effective models improve understanding of the natural world by revealing how the dynamics of species populations are often based on fundamental biological conditions and processes. Further, the field aims to unify a diverse range of empirical observations by assuming that common, mechanistic processes generate observable phenomena across species and ecological environments. Based on biologically realistic assumptions, theoretical ecologists are able to uncover novel, non-intuitive insights about natural processes. Theoretical results are often verified by empirical and observational studies, revealing the power of theoretical methods in both predicting and understanding the noisy, diverse biological world.
Herpetology is a branch of zoology concerned with the study of amphibians and reptiles. Birds, which are cladistically included within Reptilia, are traditionally excluded here; the separate scientific study of birds is the subject of ornithology.
The groundhog, also known as the woodchuck, is a rodent of the family Sciuridae, belonging to the group of large ground squirrels known as marmots. A lowland creature of North America, it is found through much of the Eastern United States, across Canada and into Alaska. It was first scientifically described by Carl Linnaeus in 1758.
Marmots are large ground squirrels in the genus Marmota, with 15 species living in Asia, Europe, and North America. These herbivores are active during the summer, when they can often be found in groups, but are not seen during the winter, when they hibernate underground. They are the heaviest members of the squirrel family.
The College of Agricultural and Environmental Sciences (Ag&E) is one of four colleges of the University of California, Davis. Established in 1922, it offers degrees in 27 undergraduate majors and thirty-three graduate groups. As of January 2014, the College has been overseen by Dean Helene Dillard.
The Vancouver Island marmot is a species of marmot endemic to Vancouver Island, in British Columbia. It is one of only five land mammals endemic to Canada.
The Olympic marmot is a rodent in the squirrel family, Sciuridae. It occurs only in the U.S. state of Washington, at the middle elevations of the Olympic Peninsula. The closest relatives of this species are the hoary marmot and the Vancouver Island marmot. In 2009, it was declared the official endemic mammal of Washington state.
Madhav Dhananjaya Gadgil is an Indian ecologist, academic, writer, columnist and the founder of the Centre for Ecological Sciences, a research forum under the aegis of the Indian Institute of Science. He is a former member of the Scientific Advisory Council to the Prime Minister of India and the Head of the Western Ghats Ecology Expert Panel (WGEEP) of 2010, popularly known as the Gadgil Commission.
The Rocky Mountain Biological Laboratory is a high-altitude biological field station located near Crested Butte, in the abandoned mining town of Gothic, Colorado in the West Elk Mountains. The laboratory was founded in 1928. Research areas include the ecology of the region, climate change, pollination biology, and a long-running study of the yellow-bellied marmot. The laboratory offers courses for undergraduate students, including National Science Foundation-funded REU students, and provides support for researchers from universities and colleges.
Lee Hannah is a conservation ecologist and a Senior Researcher in Climate Change Biology at Conservation International. Hannah is one of many authors who published an article predicting that between 15% and 37% of species are at risk of extinction due to climate change caused by human greenhouse gas emissions.
Modern environmental education in the United States began to take shape in the late 19th century with the Nature Study movement, which grew out of efforts to promote the field of natural history by naturalists including Harvard professor Louis Agassiz (1807-1873) and Anna Botsford Comstock, whose Handbook of Nature Study was published in 1911.
Catherine L. Malone is an American biologist and an author and co-author of biological subjects including works on biogeography and genetic variation.
Conservation behavior is the interdisciplinary field about how animal behavior can assist in the conservation of biodiversity. It encompasses proximate and ultimate causes of behavior and incorporates disciplines including genetics, physiology, behavioral ecology, and evolution.
Steven J. Cooke is a Canadian biologist specializing in ecology and conservation physiology of fish. He is best known for his integrative work on fish physiology, behaviour, ecology, and human-dimensions to understand and solve complex environmental problems. He currently is a Canada Research Professor in Environmental Science and Biology at Carleton University and the Editor-in-Chief of the American Fisheries Society journal Fisheries, Co-Editor-in-Chief of the Collaboration for Environmental Evidence journal Environmental Evidence, and Emeritus Editor and Strategic Advisor for the journal Conservation Physiology.
Scott P. Carroll is an American evolutionary biologist and ecologist affiliated with the University of California, Davis and the University of Queensland. Carroll's main interests are in exploring contemporary evolution to better understand adaptive processes and how those processes can be harnessed to develop solutions to evolutionary challenges in food production, medical care and environmental conservation. With Charles W. Fox, Carroll edited Conservation Biology: Evolution in Action, a book published by Oxford University Press in 2008 in which contributors, across the field of evolutionary biology and conservation, apply evolutionary thinking to concepts and practices in conservation biology, an area of research sometimes called evolutionary ecology. Carroll is founding director of the Institute for Contemporary Evolution.
Michael E. Hochberg is an American population biologist. He is currently a Research Director at the Centre National de la Recherche Scientifique, University of Montpellier, France, and a member of the External Faculty at the Santa Fe Institute.
Robert Cyril Stebbins was an American herpetologist and illustrator known for his field guides and popular books as well as his studies of reptiles and amphibians. His Field Guide to Western Reptiles and Amphibians, first published in 1966, is still considered the definitive reference of its kind, owing to both the quality of the illustrations and the comprehensiveness of the text. A professor of zoology at the University of California, Berkeley, for over 30 years, he was the first curator of herpetology at the Museum of Vertebrate Zoology, a 1949 Guggenheim fellow, and author of over 70 scientific articles. His discovery of the ring species phenomenon in Ensatina salamanders is now a textbook example of speciation, and he performed extensive research on the parietal eye of reptiles. He produced nature films, supported science education in primary grades, and organized conservation efforts that aided in the passing of the 1994 California Desert Protection Act. After retirement he continued to paint, collect field notes, and write books. Stebbins is commemorated in the scientific names of three species: Batrachoseps stebbinsi, the Tehachapi slender salamander; Anniella stebbinsi, a legless lizard; and Ambystoma tigrinum stebbinsi, the endangered Sonora tiger salamander.
Jennifer Elaine Smith is a behavioral ecologist and evolutionary biologist. She is an associate professor of Biology at University of Wisconsin, Eau Claire. Previously, she was an associate professor and chair of biology at Mills College, in Oakland, California, prior to its merger with Northeastern University. Her research focuses primarily on the social lives of mammals based on insights gained from long-term studies on marked individuals and comparative approaches.
