Science Chapter 2
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Science Chapter 2
A group of organisms of one species that lives in the same place at the same time
Occurs only under special conditions, such as introduction to a new habitat with unlimited resources, only for a short time in nature.
-When there are no limiting factors for the population
Limiting factors restrict exponential growth.
Limited resources such as water or food where there is not enough to support the population.
Size of population that can be supported by the resources and conditions of the ecosystem.
When resources are used at a pace exceeding the ecosystems carrying capacity, population will decrease to a new equilibrium(a state in which opposing forces or influences are balanced.)
The place or function of a given organism within its ecosystem.
An organisms niche includes resources they use, abiotic limiting factors that restrict how it can survive, and biotic relationships that is has with other species.
An organism that kills and consumes other organisms.
e.g. bird eats worm, bird is the prey
An organism that is eaten as food by a predator.
e.g. worm is eaten by bird, worm is the prey
the symbiotic relationship between two in which both species benefit from the relationship.
e.g. algae and coral
-algae provides coral with up to 90% of its energy, and coral provides algae with protection, nutrients, and CO2
An organism whose niche is dependent on a larger host organism.
Parasite usually benefits, and larger host is usually hurt.(Symbiotic relationship in which one species benefits and the other is hurt)
When two organisms compete for the same resource, at the same time and location.
e.g. flowers and weeds.
Use of a resource that does not cause long term depletion or affect the diversity of the ecosystem from which it was obtained.
e.g. not over using a resource to the point where it hurts the ecosystem
Period of time that is required for the population to double
Measure of impact that an individual or population has on the environment
e.g. energy consumption, land use, and waste production.
A pattern of activity that leads to a decline in the function of an ecosystem.
Use of Earths resources, including land and water, at levels that can continue forever.
Only using the amount you need
Benefits experienced by organisms that are provided by sustainable ecosystems.
e.g. provision of food and clean water, cycling of nutrients, balance of process, etc
Change of non desert areas into desert.
occurs when forests are cut down-annual precipitation drops- climate gets hotter and drier.
Tourism that is sensitive to the health of an ecosystem, involves recreational activities provided by sustainable ecosystems.
e.g. fishing, boat trips, etc