River Food Chains , livre ebook

pages

English

Ebooks

2012

Écrit par
Rachel Lynette

Publié par
Capstone Global Library

Lire un extrait

Obtenez un accès à la bibliothèque pour le consulter en ligne En savoir plus

Découvre YouScribe et accède à tout notre catalogue !

Je m'inscris

Découvre YouScribe et accède à tout notre catalogue !

Je m'inscris

pages

English

Ebooks

2012

Lire un extrait

Obtenez un accès à la bibliothèque pour le consulter en ligne En savoir plus

Publié par

Capstone Global Library

Date de parution

15 juin 2012

Nombre de lectures

EAN13

9781406255270

Langue

English

Poids de l'ouvrage

18 Mo

The elimination of the smallest link in the food chain can upset the delicate balance of nature's food supplies. This series looks at the intricate food chains found in different habitats all over the world and how we can protect them. Each titles defines

Voir

Publié par

Capstone Global Library

Date de parution

15 juin 2012

EAN13

9781406255270

Langue

English

Poids de l'ouvrage

18 Mo

PROTECTING FOOD CHAINS

RIVER FOOD CHAINS

Rache Lynette

Raintree is an imprint of Capstone Global Library Limited, a company incorporated in England and Wales having its registered office at 7 Pilgrim Street, London, EC4V 6LB – Registered company number: 6695582

All rights reserved. No part of this publication may be reproduced in any form or by any means (including photocopying or storing it in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright owner, except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency, Saffron House, 6–10 Kirby Street, London EC1N 8TS (www. cla.co.uk). Applications for the copyright owner’s written permission should be addressed to the publisher.

Edited by Abby Colich and Andrew Farrow Designed by Victoria Allen Illustrated by Words and Publications Picture research by Mica Brancic Originated by Capstone Global Library Ltd Printed by China Translation & Printing Services Ltd

ISBN 978 0 431 01395 4 (hardback) 14 13 12 11 10 10 9 8 7 6 5 4 3 2 1

British Library Cataloguing in Publication Data Lynette, Rachel. River food chains.  (Protecting food chains) 577.6’416dc22 A full catalogue record for this book is available from the British Library.

Acknowledgments The author and publisher are grateful to the following for permission to reproduce copyright material: Alamy p.22(© Jack Thomas); Corbis p.43; FLPA p.36(Tony Hamblin); Photolibrary pp.4(Picture Press/M. Delpho),8(age fotostock/ Michel Renaudeau),9(WaterFrame  Underwater Images/ Wolfgang Poelzer),13(Animals Animals/Nigel J.H. Smith), 14(age fotostock/Andoni Canela),15(Oxford Scientific (OSF)),17(WaterFrame  Underwater Images/Reinhard Dirscherl),18(Animals Animals/Victoria McCormick), 19(Mauritius/Reinhard Dirscherl),21(Oxford Scientific (OSF)),23(Animals Animals/ABPL/M Harvey),25(age fotostock/Marevision Marevision),26(Robert Harding Travel/ Christian Kober),27(Rob Jung),29(David DuChemin),30(WaterFrame  Underwater Images/Wolfgang Poelzer),35(age fotostock/Charles Donnezan),37(Animals Animals/CC Lockwood),38(Superstock/Richard Durnan),39(Claver Carroll),40(Ambient Images/Peter Bennett),41(Index Stock Imagery/Mark Gibson); Photoshot pp.33(© OceansImage/ Dave Watts),34(© All Canada Photos); Shutterstock p.42(Jessie Eldora Robertson).

Cover photograph of an adult brown bear with salmon in mouth close up reproduced with permission of Photolibrary (AlaskaStock).

We would like to thank Kenneth Dunton and Dana Sjostrom for their invaluable help in the preparation of this book.

Every effort has been made to contact copyright holders of any material reproduced in this book. Any omissions will be rectified in subsequent printings if notice is given to the publisher.

Disclaimer All the internet addresses (URLs) given in this book were valid at the time of going to press. However, due to the dynamic nature of the internet, some addresses may have changed, or sites may have changed or ceased to exist since publication. While the author and publisher regret any inconvenience this may cause readers, no responsibility for any such changes can be accepted by either the author or the publisher.

CONTENTS

What is a river food chain? ................................................. 4 What is a river habitat? ....................................................... 8 Where in the world are river habitats? ............................... 10 What are the producers in rivers?....................................... 12 What are the primary consumers in rivers? ........................ 16 What are the secondary consumers in rivers? .................... 20 What are the decomposers in rivers? ................................. 24

What are river food chains like around the world? ............ 28 How are humans harming river food chains? ..................... 34 What can you do to protect river food chains?.................. 40 Top 10 things you can do to protect rivers ........................ 44 Glossary............................................................................... 45 Find out more ..................................................................... 47 Index.................................................................................... 48

Words appearing in bold,like this, are explained in the glossary.

What Is a River Food Chain?

Rivers andstreams arefullofcreatures. Allthe plants, fish, birds, bears, otters, and beavers living nearby depend on one another for survival. So too do many other living things that you cannot see.

Everyorganismthat lives in a river obtains its food from a variety of sources, including plants, animals, dead or decaying matter, andbacteria. In a river in North America, for example, tiny caddis flylarvaeeat plantlike organisms calledalgae. Salmon feed on the caddis fly larvae. When a salmon dies, bacteria break down the remains intonutrients. The nutrients go back into the river. This suppliesenergyfor algae and other plants to grow. Then this process, called a food chain, starts all over again.

A îvîng thîngs depend on one another or survîva. A organîsms în a ood chaîn need to be protected.

Voir