The spread of an invasive species into native plant communities and causing environmental harm by developing self-sustaining populations and disrupting the structure and functioning of the system.
Measure of the variety of the Earth's animal, plant, and microbial species, of genetic differences within species, and of the ecosystems that support those species.
In the life sciences, action taken to protect and preserve the natural world, usually from pollution, overexploitation, and other harmful features of human activity.
Contamination of the environment as a result of human activities. The term pollution refers primarily to the fouling of air, water, and land by wastes (see air pollution; water pollution; solid waste).
An area of land or of land and water set aside and maintained, usually by government or private organization, for the preservation and protection of one or more species of wildlife.
An animal of the highest class of vertebrates, the Mammalia. The female has mammary glands, which secrete milk for the nourishment of the young after birth.
In biology, the process by which a living organism produces other organisms more or less similar to itself. The ways in which species reproduce differ, but the two main methods are by asexual reproduction and sexual reproduction.
American zoologist who conducted extensive studies of mountain gorillas in Rwanda. Her research brought about a new understanding of the behavior and habitat of the gorilla and supported conservation efforts in Africa.
US zoologist; director of noted survey of human sex behaviour; published Sexual Behavior in the Human Male (`The Kinsey Report') (1948) and Sexual Behavior in the Human Female (1953).
Russian zoologist and immunologist who was a pioneer of cellular immunology and shared the Nobel Prize for Physiology or Medicine in 1908 with Paul Ehrlich for the discovery of the innate immune response.