Suchergebnisse

"Human impacts are dramatically altering our natural ecosystems. The implications of these human impacts on the sustainability and functioning of these amazingly complex entities remains uncertain. As a result, food web theory has experienced a proliferation of research that seeks to address this critical area. This book synthesizes modern and classical results into a general theory. Finally, this book takes this general theoretical framework and discusses the implications of human impact for the stability and sustainability of ecological systems"--

Cover -- Title Page -- Copyright -- Contents -- Food to Live -- Making Food -- Plant Eaters -- Meat Eaters -- Eat Anything -- Break it Down -- Food Chains -- Energy Transfer -- Linking the Chains -- The Hunters -- The Hunted -- Balancing Act -- People Pressure -- Glossary -- For More Information -- Index -- Back Cover.

There are numerous food webs linking different animals that live in the mountains to one another. Some animals are predators and others are prey, and understanding this kind of animal relationship is an essential part of early science curricula. In addition to learning interesting facts related to this basic science curriculum topic, readers discover additional information about various mountain animals. The captivating, full-color photographs, vibrant food webs, graphic organizers help readers visualize this topic. The engaging tone presents information in a conversational and charming way that readers will enjoy.

"How is energy passed within a natural community? Readers will learn the answer to that question and more in this engaging and educational text all about food chains and food webs. From the smallest krill to the largest whale, all members of an ecosystem have a part to play. Readers will learn to identify the levels of a food chain, the producers, predators, and prey and understand the relationships between them. With vivid photographs to accompany the fascinating content, this book captures readers' imaginations while bringing fundamental science concepts to life"--

Planktonic marine cyanobacteria are abundant and significant in the biogeochemistry of the sea. This volume focuses on the filamentous cyanobacteria, particularly those in the genus Trichodesmium which are common in tropical and subtropical seas. A portion of this book also concerns bloom-forming cyanobacteria in the Baltic Sea area. Filamentous cyanobacteria are important as primary producers and for the fixation of atmospheric nitrogen and thus are significant in global cycling of both of these elements. In recent years, through the application of new techniques and intensive multi-disciplinary research programs, progress has been made in understanding both the biology of these cyanobacteria and their place in the marine food web. A broad range of topics is covered in this book, ranging from molecular biology, physiology, ultrastructure, enzyme localization, toxicology, remote sensing, buoyancy, herbivory and the ecology of these organisms in the marine food web. This volume is an outgrowth of a NATO-sponsored meeting held in May 1991 in Bamberg, Germany, and represents the latest synthesis on these marine phytoplankters

Cover -- Title Page -- Copyright Information -- Contents -- Chapter 1: The Tundra -- Chapter 2: Tundra Plants -- Chapter 3: Tundra Plant Eaters -- Chapter 4: Tundra Meat Eaters -- Chapter 5: Tundra Decomposers -- Chapter 6: People And The Tundra -- Glossary -- Learn More About The Tundra And Food Webs -- Index/Photo Acknowledgments -- Back Cover.

Food chains and webs are important representations of the predator-prey relationships that all living things are a part of. Readers will learn about the food chains and food webs in a variety of habitats in this volume, how everything is connected, and how every living organism plays a role. Kids will be drawn in by the colorful nature photography, while simple graphic organizers help them to understand the many roles that living organisms play.

Cover -- Title Page -- Copyright Page -- Contents -- Chapter 1: Forests -- Chapter 2: Forest Plants -- Chapter 3: Forest Plant Eaters -- Chapter 4: Forest Meat Eaters -- Chapter 5: Forest Decomposers -- Chapter 6: People And Forests -- Glossary -- Learn More About Forests And Food Webs -- Index/Photo Acknowledgments -- Back Cover