Fagbøger for børn og unge: økosystemer

"Dive into the wondrous world of water and discover the stories of more than 100 incredible aquatic lifeforms. From the deepest, widest ocean to the tiniest puddle, this beautiful compendium takes young readers on an enthralling journey through the aquatic world, meeting amazing animals, ingenious plants, and much more along the way. Stunning photography and gorgeous illustrations complement storybook descriptions about each lifeform, and children can uncover hundreds of fascinating facts as they read. Did you know that elephant seals that can hold their breath underwater for more than an hour, or that the Victoria Amazonica water lily can support the weight of an adult, or that the brown basilisk reptile can run across water? Discover the science of how plants have learnt to live, feed, and breathe in water, and take a look at the unique challenges of distinct ecosystems on feature spreads about rivers, lakes, wetlands, and more. From sharks and sailfish, to bulrushes and beetles, there's something for everyone in this celebration of all things aquatic"--

"Deep in the darkest part of the ocean, visit a primordial, fierce-toothed fish that draws in prey with its own bioluminescent lure."--

See inside the eye of a cyclone, witness hailstones the size of tennis balls, and learn how a gentle mountain stream can become a raging surge within a few minutes.From full-page color photographs to helpful diagrams, from polar regions to the tropics, Eyewitness Hurricane & Tornado shows the disastrous effects of nature's most extreme weather events. Discover a bridge that collapsed due to severe gusts of wind, and learn about a tree species in southwest Africa that can survive several years of drought. Along the way you'll uncover historical items that reveal how ancient civilizations predicted the weather as well as the weather-forecasting techniques that have developed over the centuries and the ways in which human activity can cause weather patterns to change.Each revised Eyewitness book retains the stunning artwork and photography from the groundbreaking original series, but the text has been reduced and reworked to speak more clearly to younger readers. The vibrant annotated photographs and the integrated text-and-pictures approach make Eyewitness a perennial favorite of parents, teachers, and school-age kids.

Originally published: New York: Penguin Young Readers, 2008.

When the sea otters disappear, why does their kelp forest habitat disappear, too?On the Pacific Coast of North America, sea otters play, dive, and hunt for sea urchins, crabs, abalone, and fish in the lush kelp forests beneath the waves. But there was a time when people hunted the otters almost to extinction. Without sea otters to eat them, an army of hungry sea urchins grew and destroyed entire kelp forests. Fish and other animals that depended on the kelp were lost, too. But when people protected the sea otters with new laws, their numbers began to recover, and so did the kelp forests. Susannah Buhrman-Deever offers a beautifully written account of a trophic cascade, which happens when the removal of a single element affects an entire habitat. Asides that dig deeper are woven throughout Matthew Trueman's dynamic illustrations, starring a raft of charismatic sea otters. Back matter includes more information about sea otters and kelp forests, including their importance and current status, the effects of the international fur trade on indigenous peoples, and a list of books and websites for readers who wish to continue to explore.