ECOL Test 1 Study Guide - 4:42:00 PM Scientific Method...

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24/02/2008 16:42:00 Scientific Method Theory, Hypothesis (scientific if it can be disproved), Models, Data, Observation,  Experiment(s) Precautionary Principle      – taking precautions to solve environmental problems  when a threat to the environment exists. Epistemology      – study of knowledge Science      – is a way of knowing about the natural world based on reproduced  observations Colony Collapse Disorder can be caused by     : Malnutrition Stress Pesticides Parasites/Disease Electromagnetic Radiation Introducing wolves back into Yellowstone affects:     Biodiversity (increases) Elk/coyote populations level out Population Growth Population Ecology –      how a population interacts with its environment and how  populations change over time
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Ecology –      interaction between organisms and the environment Population Dynamics –      the study of population changes CMRR –      “Capture, mark, release, recapture”.   Calculate: Assumes no B.I.D.E. (Birth, Immigration, Death, Emigration) Pika –      little rodent that “scurries” in their habitats way  Atop cold mountains where global warming is  Causing their habitat to shrink!!! Exponential Growth –      explosive, unlimited growth. Carrying Capacity –      maximum number of individuals that can be sustained by an  environment without decreasing the capacity of the environment to sustain the same  amount in the future. BIDE –      Birth, Immigration, Death, Emigration Practical Applications of population ecology:     Forecasting Pest outbreaks Harvest scenarios Managing wildlife Population growth has grown exponentially in the past 200 years whereas the  prior 10000 years it was SLOWLY increasing. Demographic Transition      – 3 stage pattern of the change in birth/death rates that  has occurred due to industrialization.  This can lead to a decline in population growth. 1. Decline in death rate 2. High growth rate 3. Birth rate drops
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The earth currently has about 6.6 billion people and by 2050 there will be around  9-12 billion! The majority of growth is taking place in less developed, poor nations (aka  developing nations) because the majority of the population is at or below childrearing  age and they are less educated about the benefits of birth control.
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