Part 2: Biomes and Population Ecology

Biomes Definition: A biome is a complex of terrestrial communities that cover a large area and is characterized by certain soil and climate conditions and particular assemblages of plants and animals. Or in simpler words- A complex community of organisms living in an ecological region that has distinctive soil conditions and climate

The 9 biomes Tundra Tropical Rainforest Temperate Deciduous Forest Taiga (Coniferous forest) Desert Savannah/Grassland Aquatic: Freshwater Aquatic: Saltwater (marine) Intertidal/estuarine Complete the biome chart! Do the Biome Project!

Factors that affect a biome Biotic Factors are biological influences, such as the food that an organism eats. “Living factors” Abiotic Factors- are factors that are physical or nonliving, such as the climate. “ Non living factors”

Other terms Habitat is where an organism lives. A niche is the job description for an organism, how it obtains its food, or what it eats. Adaptations: a naturally selected behavioral or physical trait that increases an organism’s likelihood of survival in its environment.

Interactions Competition is seen between organisms that are competing for the same resource. Predators are organisms that compete for the same resources.

Symbiotic Interactions Symbiosis is the relationship between two species that are living close together. There are 3 types: Mutual – both species benefit. Commensalism- one organism benefits, and the other organism is not affected. Parasitism- one organism lives on another and harms the other organism

Symbiotic Interactions Examples Mutualism Commensalism Parasitism

Your Turn… Commensalism Mutualism Parasitism Commensalism Commensalism

Things that Affect Populations in the Environment Population Ecology Things that Affect Populations in the Environment 1. Competition 2. Predators 3. Parasites 4. Disease 5. Droughts 6. Clear Cutting 7. Population

Renewable vs. Non-renewable A non-renewable resource is a resource that can not be replenished by natural processes. Fossil Fuels A renewable resource is a resource that can be replenished or regenerated naturally. Lumber, crops

Human Impacts/Terms Land resources must be conserved to protect plants and animals. Conservation is preserving the Earth’s resources. Forests can be protected from deforestation, which is the loss of forest areas.

Human Impacts/Terms Fisheries are being over fished. The oceans are on their way to being depleted. Air is being polluted by smog (chemicals in the air) and other pollutants (harmful material in the biosphere) Freshwater is being contaminated by run-off from farming operations and chemical plants. Biological magnification is the pollution levels increase as you go up the food chain.

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