Ecology Chapter 2 Glossary Terms Ms.Day
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Def: A group of one species that inhabit/occupy a certain area (in ecosystem).
E.g. The population of humans in Kitchener, or the population of snakes in a forest.
- Def: Accelerated growth for a period of time which ends up with large numbers (high population).
- Can only occur under certain conditions such as having an unlimited amount of resources.
1800's the human population was exponentially growing.
Def: Factors that limit the distribution, growth, and the population in a ecosystem.
- Could be a restriction such as not having enough resources to regulate the growth of a population.
The number of a population Thai is able to be supported indefinitely by the avaliable services and resources of an ecosystem.
- No addition organisms can be supported beyond carrying capacity.
Def: How an organism fills a position in a ecosystem, including all necessary biotic and abiotic factors and resources used.
E.g. Brown bats use caves and insects for resources. The abiotic limiting factors are the place used for roosting and at what time it hunts. Biotic relationships brown bats have are the insects it eats, and competitors such as a common nighthawk.
Organisms that devour and Consume other organisms.
Shark consuming (eating) seal.
Def: An organism that is killed and consumed by a predator for energy.
E.g. Fish (prey) get eaten by bears (predator), mice (prey) get consumed by owls (predator).
Def: The symbiotic relationship occurring between two different species in which both benefit from it.
E.g. One example of a mutualistic relationship is that of the oxpecker (a kind of bird) and the rhinoceros or zebra. Oxpeckers land on rhinos or zebras and eat ticks and other parasites that live on their skin. The oxpeckers get food and the beasts get pest control.
Def: Organisms whose niche depends on the close association of its larger host organism.
E.g tapeworms, vampire bat.
Def: Happens to occur at least two organisms compete for the same resources such as food, shelter, and space in the same area, during the same time.
E.g. weeds and other crops fight for space.
Def: Use of resources that does not lead to the long term depletion of the resource, or does not affect the diversity of the ecosystem from which the resource was harnessed from.
- Will allow use of resource for present and future generations to come.
Def: A period of time that is required in order for the population to double in size.
- The current doubling time is around 60 years.
Measurment of the impact of an individual or population on the environment and different ecosystems in terms of land use, energy consumption, and waste production.
Def: Pattern(s) of activities that lead to the general decline in the function of an ecosystem.
E.g. Humans have badly affected the earth and our continuing to negatively affect it (whether it be pollution or landfills etc...). This way of life is unsustainable as our world has a finite amount of resources and energy.
Use of Earth's resources (water, land) that can continue forever.
Recycling is a way that earth's resources can be used again being energy efficient.
Benefits that all organ isms including humans gain from sustainable ecosystems.
- E.g. Trees give us many benefits such as shade, and paper.
- Def: A change from a non-desert land to a desert, may result from climate change, unsustainable farming or poor water use.
Tourism that is a benefit to the health of an ecosystem. Involves recreational activities provided by sustainable ecosystems.
- E.g. fishing, hiking, kayaking.
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