Ecology. 5 Levels of Ecological Organization. Species - organisms that can interbreed and produce fertile offspring Population - all the members of 1 species in an area Community - every species in an area Ecosystem - many communities
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habitat- place where organism lives
community- ALL the species in habitat
i.e.) predator and prey
-ex) temperature, light, water, nutrients, boats
-ex) sea turtle, sea grass, coral, fish, humans
a) More sunlight and longer growing season
b) More producers (plants)
Why do we call plants producers?
c) More producers = more consumers
1) Constant source of energy (sun).
2) Living system that converts sun’s energy into organic molecules.
-Producers (plants) Why?
3) Cycling of nutrients between organisms and environment (water, carbon dioxide, nitrogen, oxygen).
4) Decomposers return unused nutrients to the environment.
KNOW THIS EQUATION!
Producers are considered autotrophs, or “self-feeders” because they can make their own “food.”
Consumers are considered heterotrophs, or “other-feeders” because they have to consume their food.
decomposers fit in
this food web?
DNA and proteins
in atmosphere converted to ammonia (bacteria in soil,
What is missing here?
CO2 + H2O + sunlight (energy) glucose (carb) + O2
***THE OPPOSITE OF PHOTOSYNTHESIS!
glucose (carb) + O2 CO2 + H2O + energy to live
-lay over 100 eggs at once
-can reproduce at 1 month old
-after 7 generations,
one fly = 15 billion flies!!!
BR + I = DR + E EQUILIBRIUM
BR + I > DR + E INCREASING
BR + I < DR + E DECREASING
i.e.) usually abiotic- natural disasters, pollution
i.e.) Disease (flu/colds winter)
interspecific (between different species)
intraspecific ( within same species)
2.) Density dependent- affect population as
a result of # of individuals
Ex) disease, predation,
- renewable/nonrenewable resources
-topsoil, groundwater, species
-air (acid rain, ozone depletion due to CFC’s in aerosol cans, global warming due to
burning and deforestationCO2
-production of tons of solid waste