EEMB2 Lecture 1

EEMB2 Lecture 1 - EEMB2 Lecture 1 August 2, 2010 August 18:...

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EEMB2 Lecture 1 20:58 August 2, 2010 August 18: Ecology Midterm September 8: Evolution Final Exam Patterns and Processes Ecology: living organisms and the interactions between organisms and environment Distribution: where they are Abundance: how many are there Factors and interactions: why they are there History of Ecology: roots of modern ecology Greek culture Looking at individual species Aristotle found Historia Animalium- natural patterns he saw in the world and explanations for those patterns Graunt: Father of demography Population growth: death rate Farr: more dense population the greater the more mortality rate o Mechanism: disease spread o Death rate goes up. Why and what are the causes? Quetelet: some sort of boundary to uncheck growth
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Verhulst: came up with equation called logistic equation to calculate it o S shape pattern, rapid growth How individual species fit together and change over time: Robert ross: disease spread but didn’t know how to predict how fast it was going to spread Mathematical construct: predict spread of disease: molaria How fast and how far Founder of systems biology Environment: composed of two primary parts the living and the nonliving (abiotic- chemical) Biotic (living biological) Codependent: abiotic and biotic interact Ecological scales: Ecology: start from organism to biosphere Explain and understand upper level of biology Highest scales of biological organization Definition Organism: individual of single species o behaviors Population: two or more of same species in same geographical area o Factors affecting population size Community: two or more populations living in same geographical area (ants, roaches, bacteria) o Interactions among organism Ecosystem: community with physical environment o Energy flow and cycling nutrients Ecological evidence: Observation, experiments, controlled lab experiment, mathematical models tested against real scale Goals: o Observe, describe, predict, manage and control Hypo-deductive reasoning Dependent on statistics Null hypothesis Significant assigns a level of confidence to prove a factual experiment
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20:58
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EEMB 2 Lecture 3 20:58 August 4, 2010
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EEMB 2 Lecture 3 20:58 Factors Limiting Distributions (Biotic Interactions- Other Species) Why is it there and not there? Transplant experiment? o Pick it up and put it over there? Does it survive there? Does it reproduce Largest region/scale o Geographic realms: 6 species transition rapidly from one composition Climate: average condition over long periods of time o Solar energy: differential heating of the planet o Sunlight hits planet at 90 degree on equator o Poles sunlight hit at an acute angle; meaning must pass through more atmosphere; reflected off or get absorbed; less energy o Hot air rises; colder at the pole; basic diffusion; not perfectly north and south because earth spins o Climate dictates next scale below biological realm: biom
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This note was uploaded on 08/14/2010 for the course BIO 2010 taught by Professor Le during the Summer '10 term at UCSB.

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EEMB2 Lecture 1 - EEMB2 Lecture 1 August 2, 2010 August 18:...

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