Biogeography is the study of the distribution of species and ecosystems in geographic space and through geological time. Organisms and biological communities often vary in a regular fashion along geographic gradients of latitude, elevation, isolation and habitat area. Phytogeography is the branch of biogeography that studies the distribution of plants. Zoogeography is the branch that studies distribution of animals. Mycogeography is the branch that studies distribution of fungi, such as mushrooms.
In population genetics, gene flow is the transfer of genetic material from one population to another. If the rate of gene flow is high enough, then two populations will have equivalent allele frequencies and therefore can be considered a single effective population. It has been shown that it takes only "one migrant per generation" to prevent populations from diverging due to drift. Populations can diverge due to selection even when they are exchanging alleles, if the selection pressure is strong enough. Gene flow is an important mechanism for transferring genetic diversity among populations. Migrants change the distribution of genetic diversity among populations, by modifying allele frequencies. High rates of gene flow can reduce the genetic differentiation between the two groups, increasing homogeneity. For this reason, gene flow has been thought to constrain speciation and prevent range expansion by combining the gene pools of the groups, thus preventing the development of differences in genetic variation that would have led to differentiation and adaptation. In some cases dispersal resulting in gene flow may also result in the addition of novel genetic variants under positive selection to the gene pool of a species or population
Aedes albopictus, from the mosquito (Culicidae) family, also known as the (Asian) tiger mosquito or forest mosquito, is a mosquito native to the tropical and subtropical areas of Southeast Asia. In the past few centuries, however, this species has spread to many countries through the transport of goods and international travel. It is characterized by the white bands on its legs and body.
Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species, it ranges widely from the number of species to differences within species and can be attributed to the span of survival for a species. It is distinguished from genetic variability, which describes the tendency of genetic characteristics to vary.
Biological dispersal refers to both the movement of individuals from their birth site to their breeding site, as well as the movement from one breeding site to another . Dispersal is also used to describe the movement of propagules such as seeds and spores. Technically, dispersal is defined as any movement that has the potential to lead to gene flow. The act of dispersal involves three phases: departure, transfer, settlement and there are different fitness costs and benefits associated with each of these phases. Through simply moving from one habitat patch to another, the dispersal of an individual has consequences not only for individual fitness, but also for population dynamics, population genetics, and species distribution. Understanding dispersal and the consequences both for evolutionary strategies at a species level, and for processes at an ecosystem level, requires understanding on the type of dispersal, the dispersal range of a given species, and the dispersal mechanisms involved.
Joan Roughgarden is an American ecologist and evolutionary biologist. She has engaged in theory and observation of coevolution and competition in Anolis lizards of the Caribbean, and recruitment limitation in the rocky intertidal zones of California and Oregon. She has more recently become known for her rejection of sexual selection and her theistic evolutionism.
Susan C. Alberts is an American primatologist, anthropologist, and biologist who is the current Chair of the Department of Evolutionary Anthropology at Duke University; previously, she served as a Bass fellow and the Robert F. Durden Professor of Biology at Duke. She currently co-directs the Amboseli Baboon Research Project with Jeanne Altmann of Princeton University. Her research broadly studies how animal behavior evolved in mammals, with a specific focus on the social behavior, demography, and genetics of the yellow baboon, although some of her work has included the African elephant. She was elected a fellow of the American Academy of Arts and Sciences in 2014, won the Cozzarelli Prize of the National Academy of Sciences in 2016, and was elected a fellow of the National Academy of Sciences in 2019.
Margaret James Strickland Collins was an African-American child prodigy, entomologist (zoologist) specializing in the study of termites, and a civil rights advocate. Collins was nicknamed the “Termite Lady” because of her extensive research on termites. Together with David Nickle, Collins identified a new species of termite called Neotermesluykxi. When Collins earned her PhD., she became the first African American female entomologist and the third African American female zoologist.
Pedro Diego Jordano Barbudo is an ecologist, conservationist, researcher, focused on evolutionary ecology and ecological interactions. He is an honorary professor and associate professor at University of Sevilla, Spain. Most of his fieldwork is done in Parque Natural de las Sierras de Cazorla, Segura y Las Villas, in the eastern side of Andalucia, and in Doñana National Park, where he holds the title of Research Professor for the Estación Biológica Doñana, Spanish Council for Scientific Research (CSIC). Since 2000 he has been actively doing research in Brazil, with fieldwork in the SE Atlantic rainforest.
Sarah E. Diamond is an American ecologist and biologist who is currently the George B. Mayer Chair in Urban and Environmental Studies at Case Western Reserve University in Cleveland, Ohio. A climate scientist, Diamond's research focuses on predicting how ecological and biological systems will respond and adapt to the changing climate.
Allison K. Shaw is an American ecologist and professor at the University of Minnesota. She studies the factors that drive the movements of organisms.
Amy D. Rosemond is an American aquatic ecosystem ecologist, biogeochemist, and professor in the Odum School of Ecology at the University of Georgia. Rosemond studies how global change affects freshwater ecosystems, including effects of watershed urbanization, nutrient pollution, and changes in biodiversity on ecosystem function. She was elected an Ecological Society of America fellow in 2018, and has been elected to serve as the Society for Freshwater Science president from 2019-2020.
Laurel G. Larsen is an Associate professor of Earth Systems Science for the Department of Geography and Civil and Environmental Engineering at the University of California, Berkeley where she also heads the Environmental Systems Dynamics Laboratory. Her areas of expertise include hydroecology, geomorphology, complex systems, and environmental modeling.
Chelsea Marina Rochman is an American marine and freshwater ecologist whose research focuses on anthropogenic stressors in freshwater and marine ecosystems. Since September 2016, Rochman has been an assistant professor at the University of Toronto in the department of Ecology and Evolutionary Biology and a scientific advisor to the Ocean Conservancy.
Aimee Dunlap is a North American cognitive ecologist and associate professor in the Department of Biology at the University of Missouri-St. Louis. She is known for her work on the role of environmental variability in the evolution and ecological function of cognition.
Victoria Louise Sork is an American scientist who is Professor and Dean of Life Sciences at University of California, Los Angeles. She studies tree populations in California and the Eastern United States using genomics, evolutionary biology and conservation biology. Sork is a Fellow of the American Association for the Advancement of Science.
John Norton Thompson is an American evolutionary biologist.
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. Her research focuses primarily on the social lives of mammals based on insights gained from long-term studies on marked individuals and comparative approaches.
Sharlene E. Santana is a Venezuelan–American biologist, currently serving as the Curator of Mammals at the Burke Museum of Natural History and as a professor of Evolutionary biology at the University of Washington, in Seattle, Washington. Her research primarily focuses on the order Chiroptera (bats), and her work often engages with a diverse range of biological disciplines, including evolution, systematics, biomechanics, behavioral studies, and ecology. Santana has worked to expand opportunities for underrepresented minorities in STEM fields and has relied on innovative applications of technology to increase the amount of high-quality scientific information that is available to the general public.
Lauren B. Buckley is an evolutionary ecologist and professor of biology at the University of Washington. She researches the relationship between organismal physiological and life history features and response to global climate change.
