"If we have been slow to develop the general concepts of ecology and conservation, we have been even more tardy in recognizing the facts of the ecology and conservation of man himself. We may hope that this will be the next major phase in the development of biology. Here and there awareness is growing that man, far from being the overlord of all creation, is himself part of nature, subject to the same cosmic forces that control all other life. Mans future welfare and probably even his survival depend upon his learning to live in harmony, rather than in combat, with these forces."
Ecology is the natural science of the relationships among living organisms and their environment. Ecology considers organisms at the individual, population, community, ecosystem, and biosphere levels. Ecology overlaps with the closely related sciences of biogeography, evolutionary biology, genetics, ethology, and natural history.
"If we recognise that every ecosystem can also be viewed as a food web, we can think of it as a circular, interlacing nexus of plant animal relationships (rather than a stratified pyramid with man at the apex)... Each species, be it a form of bacteria or deer, is knitted together in a network of interdependence, however indirect the links may be."
"We live on a Goldilocks planet that has nurtured life as it has sailed through billions of laps around the Sun. Animals evolved from microbes that resembled sperm cells that wriggled in the sea; great apes, or hominids, were born 15 to 20 million years ago; apes like us, called hominins, arose in Africa more recently, and modern humans with fine-boned skeletons have been prancing around for less than 100,000 years. Plants assemble their tissues from carbon dioxide and the power of sunbeams, and we are energized by eating them and the flesh of animals that graze on fruits and vegetables. The digestive system releases small molecules from our food and these are propelled around the body in blood vessels to sustain every cell. The architecture and operation of the body is [sic] detailed in a cluttered instruction manual written in 20,000 genes spotted along 2 m of DNA. Construction takes nine months and includes wiring a big brain that endows the owner with a sense of self and the illusion of free will. Ageing of the body is unfaltering; after a few decades, the animal stops working and is decomposed."
"Even when the pioneer didnt rape Nature, he divorced her a little too easily: he missed the great lesson that both ecology and medicine teach - that Mans great mission is not to conquer nature by main force but to cooperate with her intelligently but lovingly for his own purposes."
"Many people are under the illusion that before the meddling of humans, the populations of different types of plants and animals tended to be pretty much constant. This isn’t really the way things work, however, in a finite world. Instead, the populations of many species cycle up and down, depending on particular conditions such as the population of animals that prey on them, the availability of food, the prevalence of disease, and the weather conditions. Even forests exhibit surprising variability. Many undergo regular cycles of burning. In fact, some species of trees, such as the giant sequoias in Yosemite, require fire in order to reproduce. These cycles are simply part of the natural order of self-organizing ecosystems in a finite world."
"In recent years it has become impossible to talk about mans relation to nature without referring to "ecology"...such leading scientists in this area as Rachel Carson, Barry Commoner, Eugene Odum, Paul Ehrlich and others, have become our new delphic voices...so influential has their branch of science become that our time might well be called the "Age of Ecology"."
"Man has been endowed with reason, with the power to create, so that he can add to what hes been given. But up to now he hasnt been a creator, only a destroyer. Forests keep disappearing, rivers dry up, wild lifes become extinct, the climates ruined and the land grows poorer and uglier every day."