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ecosystem 18.1 (population changes : (The number of individuals in a…
ecosystem 18.1
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types of symbiosis:
1: mutualism: where both species benefit from the relationship.
2:commensalism: where one species benefit from the relationship and the other species is neither harmed nor benefited.
3:parasitism:where one species is benefited and the other is harmed
the host is harmed and the parasite benifits.
Ecosystem: Contains all the non living and living parts of the environment in a given area. Ex: garden
symbiosis :is a close , long term relationship between two species that usually involves and exchange in food or energy
Abiotic factor: The non living parts of an ecosystem.
Ex: sunlight, water, soil
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Habitat: is the place within an ecosystem that provides the biotic and abiotic factors an organism need to survive and reproduce. Ex: A habitat for dragonflies includes plants that grow in shallow water.
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Niche: it is the way a species interacts with abiotic and biotic factors to obtain food, find shelter and fulfill other needs.
predator : is an organism that hunts or kills other organisms for food.
prey:is and organism caught and eaten by a predator.
predation:it is the act of predator feeding on its prey.
competition: describes interactions between two or more organisms that need the same resource the same time.
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carrying capacity: is the largest number of individuals of one species that an ecosystem an support over time.
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cause:individuals live closer together ---> effect:increased population/ easier transmission of disease
population greater than carrying capacity---> area becomes over populated ; individuals move away or die .
good growing conditions or the disappearance of competing species ---> carrying capacity greater than population.
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