Sustainable Ecosystems 2
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Sustainable Ecosystems 2
sustainable ecosystems science
Sustainable Ecosystems Chapter 2
What is population?
All the individuals of a species that occupy a particuar geographic area at a certain time.
eg. Population of humans in Canada 2012- almost 34 million
Define exponential growth.
Accelerating growth that produces a J shaped curve when the population is graphed against time.
What are limiting factors?
a factor that limits the growth, distribution or amount of a population in an ecosystem.
eg. not enough resources
What is carrying capacity?
the size of a population that can be supported indefinetly by the available resources and services of an ecosystem.
(The largest number of populatin in an ecosystem is reached)
What is an ecologiacal niche?
The way in which an organism occupies a posistion in an ecosystem, including all the necessary biotic and abiotic factors.
eg. Bat- occupies cave, needs oxygen, etc
What is a predator?
An organsim that kills and consumes other organisms.
eg. eagle eats mouse
What is Prey?
An organism that is eaten as food by a predator.
eg. mouse is hunted by eagle
what is Mutualism?
a symbiotic relationship between two species in which both species benefit from the relationship.
eg. Algae in coral
What is a parasite?
An organism whose niche is dependant on a close association with a larger host organism.
eg. larval worm in white deer
What is competition?
when two or more organsims compete for the smae resource in the same location at the same time.
eg. male peacocks with bright feathers trying to attract the same female
Define Sustainable use.
use that does not lead to long-term depletion or a resource or affect the diversity of the ecosystem from which the resource is obtained.
(there will be enough to last forever)
What is doubling time?
the period of time that is required for a population to double in size.
ie. current population is estimated to double in about 60 years
what is an 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.
(measured in hectares per person)
what does unsustainable mean?
a pattern of activity that leads to a decline in the function of an ecosystem.
(using up too many resources, etc)
What is sustainability?
use of earths resources, including land and water, at levels that can continue forever. :)
what are ecosystem services?
the benefits experienced by organisms, including humans, that are provided by sustainable ecosystems.
eg Pollination, cycling of nutrients, etc
what is desertification?
the change of non-desert land into a desert, which may result from climate change or from unsustainable farming or water use.
what is ecotourism?
a form of tourism that is sensitive to the health of an ecosystem and involves recreational activities provided by sustainable ecosystems.
eg, hiking, biking,whale watching, snowshoeing etc