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Bio 102 Unit 4 Week 2 Notes

by: l_welden

Bio 102 Unit 4 Week 2 Notes Bio 102

Marketplace > University of Tennessee - Knoxville > Biology > Bio 102 > Bio 102 Unit 4 Week 2 Notes
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Notes cover material from Unit 4 Week 2
Introduction to Biology
Dr. Jeremy Chandler
Class Notes
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This 3 page Class Notes was uploaded by l_welden on Sunday April 24, 2016. The Class Notes belongs to Bio 102 at University of Tennessee - Knoxville taught by Dr. Jeremy Chandler in Spring 2016. Since its upload, it has received 12 views. For similar materials see Introduction to Biology in Biology at University of Tennessee - Knoxville.


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Date Created: 04/24/16
Day 3 I. Possible causes of CCD 1. Climate Change 2. Pesticides (neonicotinoids­possible link) 3. Habitat loss 4. Parasites/Predators (giant hornets)  5. Viruses A. Climate Change: could influence many variables on the list B. Pesticides: insect takes it in through pollination and then the pesticide attacks the  central nervous system of the honeybee ­ People sprayed mass amounts of DDT ­­­ Paul Muller showed it was an  effective insecticide  ­ Rachel Carson (Silent Spring) ­­­ birds affected by DDT and died after eating  worms affected by DDT, the worms ate the DDT from tree leaves that fell in  the dirt ­ DDT works by targeting the nervous system of many insects ­ DDT impacted all organisms in ecosystems ­­­ overtime, if you eat a lot of  organisms with DDT, it affects people and bigger animals ­ Bans/controls on pesticides and other chemicals after Silent Spring is  published in 1960’s ­ Substainability: use of Earth’s resources in a way that will not permanently  destroy or deplete them o Biocapacity: ability to sustain human demand given available Resources  Mesaured in global hectares (gha) – the biological productivity  of an average hectare ( about a soccer field)  Earth has an estimated 12 B gha available; about 1.8 per  person, but we use 2.8 per person on average currently­­­US  has a larger footprint than most world populations o Natural Resources: raw materials that are obtained form Earth and are  considered valuable even in their relatively unmodified state o Ecological Footprint:   Collective demand placed on natural resources  Measure of how much land and water is required to supply the  resources a person or organism uses o  Nonrenewable resources o Pollution ­­­ air or water pollution is a contributing factor in  declining populations  o Acid Rain   Kills microbes  Poisons plants  Metals  Kills fish o Goal of Stubstainable Development o LEED certification  Substainable materials  Greensburg has one of the highest per captita of  LEED buildings Day 4 I. Sustainable By Design A. Technology 1. Smart Grid ­­­ nuclear power, thermal power, hydraulic power, photovoltiac, wind generator ­­­ things that use are ecological vehicles, cities/offices, homes,  factories 2. Smart meters  3. Longevity: can we recycle old products into green sources 4. Things wrong with renewable sources: ­ No solar power because expensive, uses hazardous chemicals, and bad ones  have to be disposed of ­ Windmills ­­­ affect birds, environment, expansive and expensive ­­­ can we  rearrange them to make them ecologically friendly and cheaper?  ­ Nuclear : what do we do we nuclear waste ­ Biomass Supplies: we take carbon dioxide out of the air that plants use ­­­ no  net gain of carbon ­ Wind/Solar power technologies are currently more expensive than those based on oil, coal, and natural gas ­ Carbon offset: you somehow offset the carbon you produce with something  that will negate remaining CO2 emissions ­­­ instead of trees, we can use  algae blooms and microscopic organisms that are photosynthetic ­ If we do not figure out how to regulate fuels, we risk having a boom or bust in human population  B. Biodiversity 1. Loss of Biodiversity ­­­ extinctions in line with this 2. Biodiversity matters because: ­ Expanding human population threatens biodiversity and the loss of natural  ecosystems ­ Healthy ecosystems: purify air and water, decompose wastes, and recycle  nutrients ­ Wetlands: buffer coastal populations against hurricanes, reduce impact of  flooding rivers, filter pollutants ­ Estimated average animal value of ecosystem services each year in the US is  more than 33 trillion 3. Biological diversity includes genetic, species, and ecosystem diversity ­ Genetic diversity: raw material that makes microevolution and adaptations to  the environment possible ­­­­ we can combat the loss of diversity in plants  with the Svalbard seed vault, which houses seed from around the world in  Norway­­­­however, we have no guarantee that they will germinate ­ Species diversity:   o Victims of human­caused extinctions  Chinese River Dolphin  Hawaiian Crow  Northern White Rhino 4. Causes of Declining Biodiversity ­ Habitat destruction and fragmentation o Agriculture o Urban Development o Forestry o Mining – ex. Strip mining o Theodore Roosevelt – responsible for organization of national parks  (1  one was Yellowstone in 1872) ­­­ do we need to regulate national  park attendance to avoid overexploitation?) ­ Invasive species o Competed with native species o Preyed upon native species o Parasitized native species o Often better competitors for food o Ex. Cane Toad ­­­ originally from S. America and brought to Australia in efforts to control the cane beetle, but they did not and have been a  nuisance since ­ Overexploitation ­ Pollution


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