Biosphere The living part of the world Similar words are environments, ecosystems, biomes Examples of things in the biosphere Animals, plants, bacteria, insects, and viruses How does the biosphere affect humans? It’s the food we eat, the plants that we grow, provides oxygen for us to breathe, pets for comfort

Ecosystems What is an environment? It is a combination of the living and nonliving factors that interact with each other Everything in the world falls into either a living or nonliving thing The environment is also known as an Ecosystem The study of relationships of abiotic and biotic factors

Ecosystems Abiotic Factors Non living parts of an ecosystem These materials will provide the nutrients and materials needed to support the living part of an ecosystem Examples of Abiotic Factors: Samples of living factors that need nonliving factors: Plants need water and nutrients and carbon dioxide Animals need water and oxygen and vitamins

Ecosystems Samples of what happens when a biotic factor dies out: If a forest fire moves through a forest, the birds fly off, the trees would be burnt, the air would be smoky, but the soil would be enriched with nutrients Biotic Factors Living parts of an ecosystem These are organisms that exist in nature and balance the living world If part of the biotic part of an ecosystem dies, what happens to the rest of the system? Increases and Decreases in organisms Examples of Biotic factors:

Natural VS Non-natural Changes Natural Changes to an Ecosystem: Non-natural Changes to an Ecosystem:

Biomes Specific types of ecosystems and environments that have certain types of climates and biotic factors Three Types Polar Temperate Tropical

Polar Biome

Polar Biomes Climate Conditions Animals and Plants

Temperate Biomes

Temperate Biomes Climate Conditions Animals and Plants

Tropical Biomes

Tropical Biomes Climate Conditions Animals and Plants

Relationships in Biomes Climates will shape the types of animals and plants that are found in them Tropical biomes will have increased types of animals and plants Why? Animals and plants tend to grow and reproduce more in warmer, wetter climates Polar biomes will have decreased types of animals and plants Why? Colder climates are harsh conditions for plants to grow in, which means less food for animals Temperate biomes have larger human populations Why? Humans prefer the milder climates

Describe this Biome

Describe this Biome

Name the Abiotic and Biotic Factors

Name the Abiotic and Biotic Factors

Organize the following words into TWO lists, Abiotic and Biotic Factors: A cell

Food Webs Because all of the organisms in an ecosystem are connected, they are all joined together in large food webs of interconnectedness. Food webs are defined as collections of food chains, where one species is eating another, which eats another, which eats another until you reach a top predator

Food Webs Each species in a food web is in a population A population is defined as a collection of the same species living the same area Minor to major changes in food webs can lead to ripples that can flow from one part of the web to the next If a top predator dies, then there will be an increase in the population that it eats If a drought occurs, then your producers (plants) die off which means a lot of animals that each plants is have a decrease in their populations

Changes to a Food Web If the change is natural: It is easier for a food web to recover from Consumers can change their habits more quickly to prevent starvation In most cases, the change is slow If the change is unnatural: Food webs are disturbed greater Producers are the ones that feel the change the most In most cases, the change is faster and food webs do not recover as fast