The first thing we did in class today was take notes on niches and controlling population size.
-Niche: physical and biological conditions of an organism.
>where it lives
>role in food chain
Mr. Paek showed us this picture of a niche in class.
-Controlling population size
>not enough resources
>predators
-Density-dependent limiting factors: affects large populations more than small
Examples:
1. lack of food, water, and space-these are the 3 main ones
2. Predators
3. Parasitism (disease)
-Density-independent limiting factor: controls population size regardless of how large the population is at that time. Mostly natural occurances like drought/monsoon, hurricanes, weather, fire, and volcanic eruptions.
After taking those notes we worked on our homework while watching part of a video, we will watch the rest later. The video was called Planet Carnivore: "Lions". It is about an isolated volcanic crater in East Africa, where there are lions that compete for food against other animals like hyenas.
The homework is: pgs 35-41 and 43-48 in your pink packet, due tomorrow. You can also work on your oil spill project which is due 9/23.
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