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Biolgy Module 3
Defintions
| Term | Definition |
|---|---|
| Ecology | The study of interactions between living and nonliving things |
| Population | A group of interbreeding organisms coexisting together |
| Community | A group of populations living and interacting in the same area |
| Ecosystem | An association of living organisms and their physical environment |
| Biome | A group of ecosystems classified by climate and plant life |
| Biosphere | The sum of all Earth's ecosystems in land, water, or air |
| Species | A unit of one or more populations of individuals that can reproduce under normal conditions, produce fertile offspring, and are reproductively isolated from other such units |
| Biotic factors | Any living part of an environment |
| Abiotic factors | The nonliving physical and chemical conditions affecting organisms |
| Producers | Organisms that produce their own food |
| Consumers | Organisms that eat living producers and/or other consumers for food |
| Decomposers | Organisms that break down the dead remains of other organisms |
| Primary Consumer | An organism that eats producers |
| Secondary consumer | An organism that eats primary consumers |
| Tertiary consumer | An organism that eats secondary consumers |
| Quaternary consumer | An organism that eats tertiary consumers |
| Food Chain | A series of steps in which organisms transfer energy by eating and being eaten |
| Food web | Links all the food chains in an ecosystem together |
| Biomass | A measure of the total amount of living tissue of organisms within a trophic level in an ecosystem |
| Primary productivity | Rate at which producers in an ecosystem build biomass |
| Ecological pyramids | Pyramid-shaped diagrams that show the amount of energy or matter at each trophic level in an ecosystem |
| Transpiration | Evaporation of water from the leaves of a plant |
| Greenhouse effect | The process by which certain gases (principally water vapor; carbon dioxide, and methane) trap heat that would otherwise escape the Earth and radiate into space |
| Symbiosis | A close relationship between two or more species where at least one benefits |
| Habitat | The specific environment of an organism, both biotic and abiotic |
| Niche | An organism's role in its ecosystem, including its habitat, physical requirements, the time of day it is active, its place on the food chain, and when and how it reproduces |
| Mutualism | A relationship between two or more organisms of different species where all benefit from the association |
| Commensalism | A relationship between two organisms of different species where one benefits and the other is neither harmed nor benefited |
| Parasitism | A relationship between two organisms of different species where one benefits and the other is harmed |
| Exponential growth | Population growth that is unhindered because of the abundance of resources for an ever-increasing population |
| Logistic growth | Population growth that is controlled by limited resources or the presence of predators or both |
Created by:
gabbybialas
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