18 terms

Ecology

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Ecology
the study of interactions among organisms with each other and with the environment
ECO-
stemmed from the Greek term "oikos" - meaning house
Biosphere
refers to the biological component of earth's systems or all the life found on the planet
Interdependence
every organism relies on the other to survive
Levels of Organization
1. Individual
2. Population
3. Community
4. Ecosystem
5. Biome
6. Biosphere
Species
a group of individuals similar to one another that can breed and create fertile offspring
Population
a group of organisms of one species that interbreed and live together within a defined area
Community
groups of populations comprised of many species that live together in a defined area
Ecosystem
a combination of communities and the physical (non-living) environment, it is all the living and nonliving factors in a particular place
Ex: rotting log, lake, field, marsh
Biome
a large area that has a particular climate and particular species of plants and animals that live there; Ex: tundra, rainforest, desert
Biodiversity
the variety of organisms, the organism's genetic differences, and the ecosystems in which they occur
Abiotic
nonliving factors that can affect an ecosystem (soil, pollution, natural disasters, climate)
Biotic
living factors that can affect an ecosystem (plants and animals)
Habitat
a place where a particular population lives, Ex: anthills, beaver dams, etc...
Succession
a regular progression of species replacement over time
Primary Succession
succession that occurs where no soil exists
Pioneer Species
the first species to populate an area, Ex: lichen
Secondary Seccession
succession that occurs in areas where soil exists, but has been damaged or disturbed Ex: life after a forest fire