Lecture #1 - Ecology and Evolution. What do you remember about ecology or evolution? REVIEWING TOPICS FOR SUCCESS!. Reviewing Ecology vocabulary. VOCABULARY:
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What do you
remember about ecology
REVIEWING TOPICS FOR SUCCESS!
Tertiary consumer (4) Decomposer (5)
(0.1% original energy passed) (4)
Secondary consumer (3) (4)
(1 % of original energy passed)
(10% of orginal energy passed) (2)
(100% of original energy)
NOTE: ONLY ONE SPECIES CAN SURVIVE ONE HABITAT OCCUPYING ONE NICHE (competition will select one species and others will die off!)
Darwin studied organism in England and the Americas as he developed his theory on change
Darwin’s most comprehensive evidence was studying Galopagos finches (birds) with different beaks adapted to different food sources on different islands.
(example- people have different color skin, hair and eyes)
(example – frogs may lay 1000’s of eggs but only a few survive)
3. Organisms are stressed differently by environmental pressures – climate conditions, surplus or famine – and must compete for resources with other of the same species
(example- individuals in a species that get more food survive)
4. A. Organisms have a different level of adaption for survival in the habitat as it changes over time
(example- if climate gets colder, those with more hair survive)
4. B. Organism that have the best level of adaption and compete best over others are selected for survival over time.
NOTE: This concept of competing best is called Natural Selection
(example- a giraffe with a long neck is selected for over shorter necks
(Example: many vertebrates – fish, lizards, birds, humans- show similar arm structures
(Example: vertebrate arm structures that came from a common ancestor are homologous structures)