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Difference between abiotic and biotic, and what is the definition of ecology?
density vs. dispersion of a population
number in a given area; how numbers are distributed
intraspecific v interspecific interactions
interactions between individuals of same species; different species
Species diversity v species richness
variety of organisms in a place; number of different organisms
what is carrying capacity?
max population that is sustainable to resources
name abiotic factors that can effect population distribution?
temperature, wind, light, salt, water, periodic disturbances
How can density be quanitified? What's a drawback?
visual count with traps, devices, etc-- animals can adapt to this and avoid them
scramble v contest competition
indirect competition-- zebras at the watering hole; direct competition- fighting for resources
species time hypothesis v species productivity hypothesis
temperate regions have fewer species; more plants= more species richness
what is ecological footprint? which nations have the largest one?
rate of consumption and waste-- rich nations
why is temperature an important abiotic factor?
too cold- things can freeze, too hot- denaturation. can effect biomes and who thrives
Name different patterns of dispersion
clumps, random, uniform
What is parasitism? Describe a host and parasite, who benefits and who is harmed?
organism, the parasite lives in or on another organism, host, and the parasite benefits while the host is harmed
primary v secondary succession
plants and animals on bare sites; on a site that has previously supported life
Describe the greenhouse effect
why is wind an important abiotic factor?
increases effects of temperature-- causes more waves which can cause floods, water loss
Describe commensalism and provide an example
one species benefits while the other is unaffected. Whale and barnacle
what is the first trophic level? why?
producers because they make their own food and provide nutrients to the other levels
what is the greatest human impact to biodiversity?
habitat destruction
why is salt an important abiotic factor?
can effect tonicity of cells
Name factors that population growth depends on (different than demography)
age of reproduction, frequency, number of offspring, life span, competition, predation, parasitism
What is amensalism?
One species is harmed while the other is unaffected.
How much energy is lost as you move up the pyramid level by level? why?
10%-- released in the form of heat
Glaciers melt, so what?
sea levels rise, more evaporation, more rain, more drought and floods, change ecosystem, change population