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Ecosystem Unit

TermDefinition
Aquatic Ecosystem Interaction of living and non-living things in a water environment.
Terrestrial Ecosystem Interaction of living and non-living things in a land environment.
Ecosystem A system made up of all the interactions between biotic (living) and abiotic (non-living) things of a certain place.
Biotic Living things
Abiotic Non-living things
Ecology The study of the connections between everything (living and non-living) on Earth.
Food Web A model that describes how energy in an ecosystem is transferred through two or more food chains.
Photosynthesis Process in plant, algae cells, and some bacteria that converts light energy from the Sun into stored chemical energy that can be used by other living things Light energy + Carbon Dioxide + Water ======> Glucose (sugar) + Oxygen
Cellular Respiration A process in cells of living things that converts the energy stored in chemical compounds into usable energy. Glucose (sugar) + Oxygen ======> Usable energy + Carbon Dioxide + Water
Food Chain A model that describes how the energy stored in food is transferred from one living thing to another.
Consumer A living thing that gets its energy by eating producers or other consumers.
Producer Living thing that gets the energy it needs by making its own food through photosynthesis.
Nutrients Chemicals that living things need to live and grow.
Decomposers Organism that obtains energy by consuming/feeding on dead plants and animal matter.
Nutrient Cycle Continuous pattern that use and reuse nutrients.
Predation An organism (predator) feeds on another organism (prey) to obtain nutrients.
Symbiosis Interactions between two different species. 3 types: mutualism, commensalism, and parasitism
Inter-species Competition Interaction between the species of DIFFERENT organisms for the SAME resources in a habitat.
Intra-species Competition Interaction between the SAME species for the SAME resources in a habitat.
Commensalism Interaction where ONE species benefits without any harm or benefit to the other species.
Parasitism Interaction where ONE species benefits by causing harm to the other species.
Limiting Factor Ab abiotic and/or biotic environmental factor that limits the size of a population.
Population A group of members of the SAME species that live in the SAME area.
Habitat Where a species lives
Community A population of DIFFERENT species that live and interact in an area.
Species A group of similar organisms in an ecosystem that can reproduce with one another.
Carrying Capacity The largest population size that an ecosystem can sustain to be healthy.
Mutualism Interactions where BOTH species benefit in the partnership.
Watershed An area of land that drains into a body of water.
Introduced Species Any species brought into an ecosystem where it is not usually found.
Species Diversity The number and variety of species of living things in an area.
Sustainability Maintaining an ecosystem so that populations can get the resources needed without affecting future populations/resources.
Biodiversity All the different species that live in an ecosystem, plus all the other different ecosystems.
Equilibrium A stable, balanced system.
Endangered Living in the Ontario wild but is facing extinction or extirpation.
Threatened Live in the wild in Ontario, is likely to become endangered if steps are not taken to address the problem.
Special Concerns Lives in the wild in Ontario, they are not endangered/threatened, but may become endangered/threatened.
Extirpated Used to live in the wild of Ontario but can be found in other locations in the world.
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