Challenges to Ecosystems. 1. What is competition? A. When two or more organisms are rivals for the same resource. B. What are resources? Food, water,

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Presentation transcript:

Challenges to Ecosystems

1. What is competition? A. When two or more organisms are rivals for the same resource. B. What are resources? Food, water, mates, a place to grow (like Mussels in video)

2. What is the difference between renewable and non-renewable resources? A. Renewable are regenerated 1. Examples: food and water B. Non- renewable can not be replaced easily & quickly. 1. Examples: space to live.

3. Can resources be controlled? A. Rainfall is not controllable B. Food is controllable **A limiting resource is a resource in short supply, thus limits the size of the population of the organism..

4. What is carrying capacity? A. The maximum number of individuals of a particular species that an environment can support. B. Some are not decomposed fully and end up in deposits underground (oil, coal, etc.).

5. Why do lakes sometimes turn green in the summer? Algae bloom A. What is it caused by? Rain causes runoff of fertilizers that have a lot of nitrogen (food resource for nitrogen) B. Why do the plants in the lake die? Can’t get the sun for photosynthesis C. Example of resource depletion

6. What is biodiversity? A. The number and variety of different species in an area Why do we care? 1. The more biodiversity means the more complex the food web 2.If one species dies off, other links will keep the system from collapsing.

7. How does the algae bloom relate to a threat in biodiversity? A. If plant growth decreases…… B. It decreases the oxygen for animals to survive in the lake! C. Have less biodiversity and all biotic organisms could eventually die. D. Called a population crash

8. What is biomass and why is it important? It is the total amount of dry mass of organisms in an area. A pyramid shows the mass of producers that are needed to support primary consumers, to secondary consumers to tertiary consumers, etc. The biomass shows the carrying capacity!