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Ecosystems Set #1

8.L.3.1, 8.L.3.2, 8.L.3.3

ecosystem All the living (biotic) and non-living (abiotic) things that interact in an area
biome A group of ecosystems that have the same climate and similar communities of plants and animals
niche An organism's particular role in an ecosystem, or how it makes its living.
population a group of the SAME species of organisms living in an area
community ALL living organisms in an area
predator/prey relationship Interaction between two organisms of different species in which one organism captures and feeds on parts or all of another organism
food chain The path of food energy from one type of organism to the next
parasite An organism that lives on or in a host; causes harm to the host
host an organism in or on which a parasite lives
producer Synonym for autotroph.
consumer Synonym for heterotroph.
herbivore An organism that eats only plant based foods.
carnivore An organism that eats meat (muscles) of other organisms.
omnivore An organism (animal or person) that eats food from both plants and animals.
decomposers organisms that get energy by breaking down the remains of dead organisms.
food web Many interconnected food chains within an ecosystem
energy pyramid A diagram that shows the amount of energy/food that moves from one feeding level to another in a food web
limiting factors when resources such as food, water or space become limited forcing competition
competition when two or more individuals or populations try to use the same limited resource (food, water, habitat)
biodiversity a variety of living things in a particular ecosystem
symbiosis A close relationship between two species that benefits at least one of the species.
mutualism A relationship in which both species benefit
commensalism A relationship between two species in which one species benefits and the other is neither helped nor harmed
parasitism A relationship in which one organism lives on or in a host and harms it.
trophic level any class of organisms that occupy the same position in a food chain, as primary consumers, secondary consumers, and tertiary consumers.
heterotrophs An organism that cannot make its own food. It must consume other organisms to obtain energy.
autotrophs An organism that is capable of making its own food (typically through photosynthesis)
terrestrial ecosystem A type of ecosystem that has to do with earth and land based plants and animals
aquatic ecosystem An ecosystem in a body of water, Types: marine and freshwater
population density is a measurement of population per unit area
adaptation a change or the process of change by which an organism or species becomes better suited to its environment
biosphere the regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms.
anaerobic bacteria organisms that do not live or grow in the presence of oxygen.
abiotic factors All of the NONliving parts of an ecosystem
biotic factors All of the living parts of an ecosystem.
photosynthesis process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and sugars or starches
nitrogen cycle The transfer of nitrogen from the atmosphere to the soil, to living organisms, and back to the atmosphere
nitrogen fixation process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
carbon cycle the movement of carbon from the nonliving environment into living things and back
carrying capacity the largest population that an environment can support at any given time
chemosynthesis Process by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates
scavenger A carnivore that feeds on the bodies of dead organisms
invasive species species that enter new ecosystems, having no natural predators, harm native species and their habitats
cellular respiration A process that uses oxygen in organisms to break down simple food molecules to produce energy.
marine ecosystem Aquatic system of interactions between organisms in salt water
Coexistence When populations of different species use the same limiting resources; they "get along" as long as there is enough to go around
Cooperation A group of the same organisms working together for a common goal; NOT mutualism
Competition When 2 or more organisms struggle to use the same limiting resources when in short supply
Predation An interaction in which one organism kills another for food.
Created by: jhandy8
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