Biomes and Energy FlowMs. Wood

What is a biome?

Biome- a group of ecosystems with similar climates and organisms

Ecosystem – All living and nonliving things that interact in an area

Key Components of Biomes

Biotic factors – living parts of ecosystems

Abiotic factors – nonliving parts of ecosystems

Common climate – temperature and rainfall mostly determine the biome

Types of Biomes

Terrestrial Biomes Tropical Rain Forest Temperate Rain Forest Desert Prairie Savanna Deciduous Forest Boreal / Taiga Tundra

Freshwater Biomes Ponds and lakes Rivers and streams

Marine Biomes Estuaries Intertidal Zone Nertic Zone Surface Zone Deep Zone

Producers and Consumers

Producer – an organism that makes its own food

Consumer – an organism that obtains energy by feeding on other organisms

Decomposers and Keystone Species

Decomposer -An organism that breaks down waste and dead organisms

Keystone Species – A species that influences the survival of many others in an ecosystem

Food Chain

Series of events in which one organism eats another and obtains energy

1 possible path along which energy can move through the ecosystem

Most organisms are part of several food chains

Draw an example food chain in your notes

Food WebMany overlapping food chains in an

ecosystem

More realistic way to view energy flow in an ecosystem

Energy Pyramid

Diagram that shows the amount of energy that moves from one feeding level to another in a food web

Most energy is at the producer level

At each level, there is less energy than at the level below

Only 10% of energy is transferred from 1 level to the next

90% of energy is used for life processes and heat

Draw an example energy pyramid in your notes

Energy Pyramid Example