THE BIOSPHERE Ch. 3 p.62-83. What is Ecology ?. Study of interactions between organisms and between organisms and their environment . Ernst Haeckel – coined term Ecology in 1866 Greek word “ oikos ” means house Natures “houses”come in many sizes. Levels of Organization.
Heterotrophs – get their food from another source so they are called CONSUMERSAutotrophs vs. Heterotrophs
Eat plants and meat
Herbivores- only eat plants
Carnivores - only eat meat
Detritivores and Decomposers
Feeds on plant and animal remains
Food Web – network of all the food chains in an ecosystemFeeding Relationships
Pyramid of Numbers
Some of the energy is lost as heatPyramid of Energy - amount of energy available at each trophic level
Nutrients are passed between
organisms & the environment through biogeochemical cycles
Geo – Earth
Chemo – chemical
PHOSPHORUS CYCLEHow doesMatter move through an ecosystem?
PHOSPHORUS FORMS PART OF IMPORTANT LIFE-SUSTAINING MOLECULES (ex. DNA & RNA)