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Ecology Vocab
Term | Definition |
---|---|
Ecology | The study of interactions among living things and their surroundings. |
Organism | A living thing |
Population | A group of organisms of the same species that live in the same area at the same time |
Community | A group of different populations (different species) that live in the same area at the same time |
Ecosystem | The collection of organisms and nonliving things (like rocks, soil) found in an area |
Ecology | The study of interactions between biotic and abiotic factors in an ecosystem. |
Biotic Factor | A living thing in an ecosystem Ex) Plants, Animals, Bacteria |
Abiotic Factor | A nonliving thing in an ecosystem. Ex) Water, Rocks, Soil |
Biodiversity | The variety of living things found in an area |
Producer | An organism that obtains its energy from the sun and converts this energy during the process of photosynthesis |
Consumer | An organisms that obtains its energy and nutrients by eating other organisms |
Autotroph | An organism that can use photosynthesis to make its own food. "Self Feeding" |
Heterotroph | An organism that cannot use photosynthesis to make its own food and must eat other organisms to survive. "Other Feeding" |
Food Chain | A sequence of organisms that shows how energy is transferred from plants, to producers to consumers |
Food Web | A combination of several food chains in an ecosystem |
Herbivore | A heterotroph that eats plants only |
Carnivore | A heterotroph that eats other animals only |
Omnivore | A heterotroph that eats both plants and other animals |
Detrivore | Organism that eats dead organic matter. AKA Decomposer |
Decomposer | A detrivore that breaks down organic matter into simper compounds, returning nutrients back into the ecosystem. |
Trophic Level | The position a species occupies in a food chain Ex) Producer, primary consumer, secondary consumer |
Energy Pyramid | A graphic representation of the amount of biomass or energy present in each trophic level of a food chain. Producers are always on the bottom. |
10% Rule | Only 10% of available energy transfers from one trophic level to another. The other 90% is lost as heat. |
Microorganisms | Living things that can only be seen with a microscope. They may function as decomposers in the food chain Ex) Bacteria |
Biomass Pyramid | Measures the total mass (weight) of organisms at each trophic level |
Pyramid of Numbers | Shows the total number of organisms at each trophic level |
Habitat | WHERE an organism lives |
Niche | HOW an organism lives in its environment |
Apex Predator | The predator at the top of a food chain, on which no other predators prey |
Immigration | Organisms moving IN to a population, increases population size |
Emigration | Organisms moving OUT of a population, decreases population size |
Predation | A relationship between two species where one species hunts (predator) the other species (prey) |
Competition | A relationship between two species where they both require the same resource (Food Water Shelter Space) and must compete for it |
Habitat Requirement | Something necessary to make a good place to live: Food, Water, Shelter, and Space |
Carrying Capacity | The maximum amount of organisms that can survive in an ecosytem |
Logistic Growth | Population growth that slows down before getting to carrying capacity |
Exponential Growth | Population growth that occurs quickly without slowing down |
Density Dependent Factors | Limiting factors in an ecosystem that have bigger effects when the population is bigger (Ex: Disease, competition) |
Density Independent Factors | Limiting factors in an ecosystem that do not change with the size of the population (Ex: hurricanes, earthquakes, humans building a city) |