Ecosystems Q&A
By: Gillian Richardson
Series: Science discovery
Publisher: AV2 by Weigl
Published: 2014
Place of publication: New York, NY
Language: eng
Number of pages: 48
ISBN-13: 9781621274131; 9781621274193
Copyright date: 2014
Subjects: Biotic communities; Ecology; Juvenile literature
Notes: Includes index.
Table of contents: title: What is an ecosystem?; title: What organisms form an ecosystem?; title: How many organisms are there?; title: Why is biodiversity important?; title: What are the basic needs for survival?; title: Where on earth do organisms live?; title: How big are ecosystems?; title: What is a  suitable environment?; title: How does a balanced ecosystem work?; title: What happens when an ecosystem changes?; title: What is a food chain?; title: What is a population cycle?; title: What is a keystone species?; title: How long can a species survive?; title: Can endangered species be saved?; title: What impact do humans have on nature?; title: What is ecotourism?; title: Are national parks for wildlife or people?; title: How does human activity affect the environment?; title: What is a rain forest without rain?; title: Eco-careers; title: Young scientists at work; title: Take an eco-survey.