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G9-Science

Science Chapter 2

QuestionAnswer
population all the individuals of species that occupy a particular geographic area at a certain time.
carrying capacity the size of a population that can be supported indefinitely by the available resources and services of an ecosystem.
ecological niche the way in which an organism occupies a position in an ecosystem, including all the necessary biotic and abiotic factors.
predator an organism that kills and consumes other organisms
parasitism an organism whose niche is dependent on a close association with a larger host organism.
unsustainable use use that does not lead to long-term depletion of a resource or affect the diversity of the ecosystem from which the resources is obtained.
intensification the creation high- density residential areas and compact developments.
exponential growth accelerating growth that produces a J-shaped curve when the population is graphed against time.
equilibrium the balance between opposing forces.
habitat a place where an organism lives.
prey an organism that is eaten as food by a predator.
mutualism a symbiotic relationship between two species in which both species benefit from the relationship.
doubling time the period of time that is required for a population to double in size.
sustainability use of earths resources, including land and water, at levels that can continue forever.
limiting factors a factor that limits the growth, distribution or amount of a population in an ecosystem.
urban sprawl the growth of relatively low-density development on the edges of urban areas.
watershed an area of land over which the run-off drains into a body of water.
competition when two or more organisms compete for the same resource in the same location at the same time.
desertification the change of non-desert land into a desert, which may result from climate change or from unsustainable farming or water use.
ecological footprint a measure of the impact of an individual or a population on the environment in terms of energy consumption, land use, and waste production
ecosystem services the benefits experienced by organisms, including humans, that are provided y sustainable ecosystems.
how do you identify exponential growth graphically? an indication that there was exponential growth is a J-curve
list abiotic and biotic limiting factors abiotic: food, water, oxygen, space availability. biotic: predators, competition, urban sprawl.
how to identify carrying capacity graphically. if the population is increasing then suddenly decreases then becomes equilibrium, we can tell the population reached its carrying capacity.
how can carrying capacity change as a result of abiotic and biotic limiting factors
how does human activity effect populations of terrestrial and aquatic ecosystems. give examples.
what is urban sprawl and how can intensification reduce it its when people build new homes and new businesses near the outer edge of a city. intensification policy requires that a large percentage of new development must occur on land within the boundaries of the city.
what is an ecological niche. give an example when species have jobs in the sense of providing benefits to their ecosystem. abiotic niche for the big brown bat is the place they hibernate, when they hunt, where it flies while hunting. biotic niche is the insects it eats, competitors, and predators.
an example of a predator-prey relationship lynx and hare (lynx eats the hare)
what is bottom up regulation when the prey population decreases, the predator population decreases
what is top down regulation when the predator population increases, the prey population decreases.
what factors can increase/ decrease ecological footprints your energy consumption, land use, waste production.
what is the difference between sustainable and non-sustainable use of resources being sustainable is when you are aware of the amount of resources you use, and use only what you need. non-sustainable is when you keep on using resources even if they are not needed
what are the 5 types of interactions amongst species predation, competition, parasitism, mutualism and commensalism
give an example of predation when a lynx hunts and consumes a hare, the lynx is the predator and the process is called predation
give an example competition when dandelions and grass compete for the same resources (water, sunlight)
give an example of parasitism
give an example of mutualism algae lives inside coral. the algae provides the coral with energy. the coral provides algae with protection, nutrients and a constant supply of carbon dioxide for photosynthesis.
give an example of commensalism a spider makes a web on a tree. The spider is benefitting but the tree is either benefitting to in harm.
Created by: caitlynkummer