From tiny organisms to entire biomes, young scientists examine the interdependent relationships tying all living and non-living things together with this collection of ecology resources.

Lots of information about the black carpenter ant. Learn about their physical characteristics, colonies, life cycle, food sources, and predators. A detailed chart listing many plants and animals permits exploration of their relationships...

This comprehensive study guide covers the main terms and concepts needed for a unit on community ecology.

An advanced discussion of plant interactions and relationships. Energy flow, nutrient cycling and succession are discussed. Try the quiz to check your understanding.

Describes three types of symbiotic relationships that can be found in a desert biome.

Learn how mutualism benefits the organisms in a symbiotic relationship and what the different types of mutualism are. Provides lots of examples.

Explains what a predator-prey relationship is and describes ten examples of this.

Explains what mutualism, commensalism, and parasitism look like in a tundra biome.

Explains what mutualism, commensalism, and parasitism are.

Species interact every day. That interaction is a vital part of how organisms develop and change over time. When you study species, it is important to watch the way they interact with their surroundings. There are four basic types of...

Dive in and explore what makes this beautiful world so fragile. In this Web feature, from the PBS series "Evolution," discover how coevolution has shaped the ecological relationships among reef creatures.

[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about ecological roles and relationships. Includes a few questions to check for understanding.

After reviewing the roles of consumers, producers and decomposers, you'll create your own food chains using pictures from magazines. The site also has 18 questions to see if you can identify the ecologic role played by various organisms.

Explains the characteristics of food chains and food web; the different levels of producers, consumers, and decomposers; and the differences between food chains and food webs. Includes charts and a Venn diagram comparing the two.

Scholars explore concepts in Biology about symbiosis. The tutorial consists of definitions, examples, and pictures about interliving as a basic pattern of life.

Interspecific competition in an ecosystem is explained, along with the different ways it can manifest itself. Includes examples in different types of biomes.

Explains what parasitism is and provides a few examples of parasitic relationships.

Explains what a primary consumer's role in a food chain is and provides examples.

Describes the characteristics of a tundra biome, how a tundra food chain compares to a tropical food chain, and what the different trophic levels look like.

Explains what biomass and energy pyramids are and provides a table highlighting their differences.

Explains the roles of consumers, producers, and detrivores or decomposers and how energy flows through the different levels of the energy pyramid of a tropical rainforest.

Explains what a food web is, the complexity of one in a rainforest, and how energy flows through a food web.

Explains what intraspecific competition is and gives examples.

Not all genetic mutations are harmful. Examples of beneficial mutations are described here.