With the intensification of agriculture during the last century, the number of grass species was reduced. A small number of species were selected and have come to dominate the grasslands and the seed market. A documented plea for a re-evaluation of spontaneous grasses, this book contains profiles of 43 temperate species, many of which are regaining importance in the context of agricultural intensification. Amply illustrated, each profile includes a description of the plant, its ecological requirements, its agronomic characteristics and its uses, including innovative and unusual. Wild and sown grasses is an invaluable work of reference for students of agriculture, lecturers, researchers, consultants, ecologists, nature conservationists and other involved in the diverse uses of grass communities. [Co-published with Blackwell Publishing, UK.]
The accurate identification of fish 'ear-bones', known as otoliths, is essential to determine the fish prey of marine and terrestrial predators. Fish otoliths are species-specific when combining size, shape and surface features, and can remain undigested for long periods. As a result, they can indicate which fish make up the diet of various predators, including cephalopod, seabird, marine mammal and fish species. Such studies are crucial for understanding marine ecosystems, and trophodynamics in particular. Increasingly, these methods are being used to understand the diet of some terrestrial predators, also extending to that of humans in archaelogical studies.
"A child astronaut takes an imaginary trip to Saturn, learns about the harsh conditions on the gas planet, and decides that Earth is a good home after all. Includes solar system diagram, Saturn vs. Earth fact chart, and glossary"--Provided by publisher.