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This 3 page Class Notes was uploaded by Savannah Peat on Monday February 1, 2016. The Class Notes belongs to ECOL1000 at University of Georgia taught by Dr. J Vaun McArthur in Spring 2016. Since its upload, it has received 234 views. For similar materials see Environmental Issues in Business at University of Georgia.
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Date Created: 02/01/16
1/28/16 Review: positive and negative feedback 1,325 billion= 1.3 trillion Man and the Environment Man has caused some of the most serious environmental problems, but has also found solutions Modern man in developed counties has been more and more removed from the environment Our knowledge of nature has become more restricted, and more people are avoiding it Compared to 100 years ago we live longer less likelihood for disease purer water better dwellings more educated Why is an there increased separation between well being and happiness? Quality of life is affected by the environment Impact on ecosystem services Many human activities disrupt ecosystems Ex: POLLUTION, FERTILIZERS, NON NATIVE SPECIES, DESTRUCTION OF WETLANDS, OVERHARVESTING OF FISHERIES, DEFORESTATION Biodiversity What are local, national, and global values of biodiversity? How can it be used and conserved? Who should benefit from diversity? 1. Genetic Diversity genetic variation within species 2 . Species Diversity – diversity between different species 3 . Ecosystem diversity diversity in a region We don’t know: We do know: What exists on earth and where? Man is not on top! How do biological resources function? How does the system interact? Ex of Biodiversity: Ecuador Rainforest found way to include biodiversity with their production of Kallari chocolate Butterfly Problem Should we save every species, including the “smaller” species? Endangered species act fails to balance costs and benefits; avoids bad choices that must be faced Commonness Scale rates extinction on scale of 50 from common (5) to rare (2), to extinct (0) There were multiple hypotheses developed for Ohio as to why certain butterflies go o 1. Common species are less likely to go These are both wrong! >>> extinct, rare species are more likely to go extinct o 2. Species at center are more likely to go extinct, species on brink of area is less likely to go extinct o The real explanation: Ohio has been recently covered in farmland and the species were tied to wetlands o Ohio now has 90% wetlands Colony Collapse Disorder All about bees Their loss could affect 1/3 of our caloric intake AND even our clothes Ex of bee species decrease: Seneca County, Ohio What is the correlation with rats going extinct in California and bee collapse disorder? Rats are destroyed by man, the bees are dying by virus But where did the virus come from? the habitat Bottom line: Preserve Habitats, not Species Tropical Diversity never have their ever been this many species on the planet Described Species number of species described and named; 1 million plants and animals described********* Most living things are bugs, that’s why rainforests are so diverse With very few exceptions, most taxanomic groups are very diverse on tropics Ex: Costa Rica 50% of all species are tropical time stability hypothesis diversity is related to length of time an area has been around Why are the tropics so diverse? Higher speciation rates and lower extinction rates They’re both a cradle and a museum, meaning speciation and extinction are higher 1/40 species are described 1 million tropical described species x 40, because 1/40 are described, means that 40 MILLION SPECIES ARE NO DESCRIBED Reasons for Extinction logging forest 21% cattle ranching 10% mining 8%, dams 7% Slash and Burn 54% 50,000 species lost every year because of this
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