38045685
Description
Flashcards by Madison Ho, updated more than 1 year ago
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Created by Madison Ho
about 2 years ago
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| Question | Answer |
| Food Web | Model shows interconnected food chains & pathways in which energy flows through a group of organisms |
| Biomass | Total mass of living matter @ each trophic level-decreases @ each level |
| Matter | Anything that takes up space & has mass-provides nutrients for organisms to function |
| Nutrient | Chemical substance an organism must obtain from its environment |
| Biogeochemical Cycle | Exchange of matter through the biosphere |
| Nitrogen Fixation | Nitrogen gas is converted to ammonium before it can be used by plants & animals |
| Ecological Fixation | Change occurs in an ecosystem when 1 community replaces another as result of changing abiotic & biotic factors |
| Primary Succession | Community established in area of exposed rocks that doesn't have a topsoil |
| Secondary Succession | Orderly & predictable change that takes place after community of organisms has been removed but the soil remains |
| Climax Community | Stable, mature community that results when there's little change in the composition of species |
| Weather | Condition of atmosphere @ specific time & place |
| Latitude | Distance of any point on the Earth's N & S equators |
| Climate | Average weather conditions in an area, includes temp. & precipitation |
| Population Density | 1 characteristic of a population |
| Dispersion | Pattern of spacing of a population within an area |
| Density-Dependent Factor | Biotic factors such as predation, disease, competition, & parasites |
| Density-Independent Factor | Abiotic factors that include natural weather prob. |
| Carrying Capacity | Maximum # of individuals in a species that an environment can support in long term |
| Biodiversity | Variety of life in an area that's determined by the # of diff. species in the area |
| Overexploitation | 1 factor increasing the current rate of extinction of a species |
| Exponential Growth | Occurs when population size increases dramatically over period of time |
| Logistic Growth | Population begins w/ period of slow growth followed by brief period of exponential growth before leveling off @ stable size |
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