Читать книгу The Earth as Modified by Human Action - George P. Marsh - Страница 24

Modern geography takes account of organic life—Geographical importance of plants—Origin of domestic vegetables-Transfer of vegetable life—Objects of modern commerce-Foreign plants, how introduced—Vegetable power of accommodation—Agricultural products of the United States—Useful American plants grown in Europe—Extirpation of vegetables—Animal life as a geological and geographical agency—Origin and transfer of domestic quadrupeds—Extirpation of wild quadrupeds—Large marine animals relatively unimportant in geography—Introduction and breeding of fish—Destruction of fish—Geographical importance of birds—Introduction of birds—Destruction of birds—Utility and destruction of reptiles—Utility of insects and worms—Injury to the forest by insects—Introduction of insects—Destruction of insects—Minute organisms.