2.2 Interactions Among Species (Pages 56-64) Homework: Page 64 # 3-8

Key Concepts: (Page 64) Each species occupies an ecological niche, which has biotic and abiotic components. Many species, such as bog plants, occupy narrow niches for which they are well adapted.

Predation, competition, mutualism, and parasitism are four major kinds of relationships between species. These relationships help to define a species’ niche and influence the distribution and abundance of the species.

Species Ecological Niche: What is an ecological niche? Ecological niche is the way that an organism occupies a position in an ecosystem.

2.What are the biotic niche factors of a brown bat? It includes all the insects that it eats, its competitors and predation.

3. What are the abiotic niche factors of a brown bat? It includes the places it uses for roosting and hibernation, the airspace and temperature range it can tolerate.

4.Describe a “bog”. Why are carnivorous plants, such as the pitcher plant, thrive only in bogs? A bog is a type of wetland in which the water is acidic and low in nutrients.

Population and Population Size: 5. What is a predator and prey? A predator is an organism that kills and consumes other organisms. A prey is an organism that is eaten as food by a predator.

6. Movie: Trials of Life Predator Prey

Competition: 7. What happens when the number of population of certain species in an ecosystem increases? As population of species increase, the competition for resources also increase.

8. In the picture are snails that live in shore by the ocean 8. In the picture are snails that live in shore by the ocean. If the population of snails multiples exponentially, what will happen with this small ecosystem? Snails would compete for food, nutrients and space.

8. In the picture below are different species of plants that thrive in the rainforests such as ferns, wild palm trees, bamboo and ginger plant. Which plant species do you think will take most of the resources available in order to survive and why? The bamboo plant will take most of the resources available in order to survive because their roots are bigger, they grow taller and they multiply faster.

Symbiosis: 10. Complete the table below: Symbiosis and Types Mutualism-A symbiotic relationship wherein both species benefit. (corals and algae) Parasitism-An organism that depends on a host for survival.(Tapeworms & Humans) Predation-A biological interaction where a predator feeds on its prey.(Lions & Zebra) Competition-Where organisms fight for resources to survive.(Dandelions & Grass)

11. Describe the symbiotic relationship between corals and algae 11. Describe the symbiotic relationship between corals and algae. What causes the color loss associated with bleaching? Algae gives off oxygen and other nutrients to the coral and the coral polyp provides shelter and carbon dioxide to the algae. Algae cause the colour in coral reefs. When they die out, bleaching or whitening occurs.

Trials of Life