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Ecology vocab Dallas
List of Ecology terms
| Question | Answer |
|---|---|
| Abiotic | non-living components |
| Biotic | living components |
| Ecology | the study of interactions between organisms and their environments |
| Photic | where photosynthesis can occur because there is enough light |
| Populations | group of individuals of one species in one area at one time |
| Density | number of individuals per unit area/volume |
| Dispersion | spacing of individuals within a geographic area |
| Clumped dispersion | aggregated in patches |
| Uniform dispersal | evenly spaced, sometimes caused by interaction |
| Random dispersal | unpredictable, no attraction or repulsion |
| Survivorship curves | plot of number in a cohort still alive at each age |
| Type I survivorship curve | large portion of offspring survive to adulthood (human) |
| Type II survivorship curve | constant death rate over lifetime (rodents) |
| Type III survivorship curve | few offspring survive to adulthood(fish, spiders) |
| Life history | traits that affect an organism’s schedule of reproduction and survival |
| N | Change in population size formula birth-deaths |
| R | per capita birth-per capita death |
| Carrying capacity | K, maximum population size a particular environment can support at a given time |
| Exponential growth | ideal conditions constrained only by life history |
| K selection | density dependent, birth/deaths don’t change with density |
| R selection | density independent favors rapid reproduction traits |
| Species richness | the number of species that a community contains |
| Relative abundance | the number of animals within each species in a community |
| Community | a group of populations in the same habitat at the same time |
| Competitive exclusion principle | two species so similar that they complete for the same limiting resource cannot coexist in the same place |
| Ecological niche | sum total of a species use of biotic and abiotic resources Resource Partitioning |
| Batesian mimicry | a harmless species mimics a harmful one |
| Mullerian mimicry | some toxic animals have the same colors (like bees) |
| Endoparasites | live in host, deadly |
| Ectoparasites | feed on eternal surface (mosquito) |
| Commensalism | beneficial to one and has no affect on the other |
| Trophic structures | feeding relationship between organisms |
| Food chain | transfer of food energy from its source in plants through herbivores to carnivores and eventually to decomposers, each link makes a trophic levels. |
| Keystone species | exert control on the community by their niche rather than number. Ecological succession |
| Biodiversity | how many species in a community |
Created by:
debbierichards
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