| A | B |
|---|
| ecosystem | community of living things interacting with each other and with the phys. environment |
| ecosystem examples | rainforest, desert, pond, garden, ocen |
| habitat | physical place within an ecosystem where a plant or animal can find the specific things it needs to survive |
| keystone species | important to entire ecosystem's survival |
| population | group of animals that live in a certain area |
| pups | 0-6 months |
| juveniles | 6-12 months |
| sub adults | 1 year to 3 years |
| adults | 3 years and above |
| species | all plants and animals that share specific characteristics |
| food web | made up of food chains, all things that are inter-related |
| kelp habitat requirements | calm, salty water with mild temperature |
| population model | shows what happens to a population over time |
| niche | the part of an ecological system occupied by a |
| endangered species | may soon become extinct |
| sea otter adaptation | webbed back feet, thick fur, ability to use tools to eat |
| death of juveniles caused by | starvation |
| migration and birth | ways members can be added to population |
| birth rate | relationship between the number of births and the whole population |
| sub-adults | sea otter group that caused population to decline |
| ways that pollution affects sea otters | weaken immune system, oil on fur, reproductive failure from pcb |
| death of pups caused by | starvation |
| death of sub-adults caused by | drowning |
| death of adults caused by | shark attack |
| overall cause of ocean edge population decline | drowning in fish nets |
| effect of prey species without predators | population over-growth, less food, another species dies off |
| adaptation | physical or behaviour trait that helps a species survive in its natural habitat |
