ASB 222 Week 4 notes
ASB 222 Week 4 notes ASB 222
Popular in Buried Cities and Lost Tribes
Popular in anthropology, evolution, sphr
This 2 page Class Notes was uploaded by Nina Prejean on Sunday October 18, 2015. The Class Notes belongs to ASB 222 at Arizona State University taught by Perreault in Fall 2015. Since its upload, it has received 74 views. For similar materials see Buried Cities and Lost Tribes in anthropology, evolution, sphr at Arizona State University.
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Date Created: 10/18/15
Buried Cities and lost Tribes 923 Notes 0 Reconstruction environments 0 O OVOO O 0 Eva wt Archeological record is lled with places that have collapsed because they were not able to adapt to climate Easter Island belongs to Chile but it is in the middle of paci c ocean 2253 miles from Chile humans arrived about 900 AD 1100 years ago European sailors landed in about 18th century spotted by Dutch sailors native people only had small frail canoes how did these people get to the island with only small canoes Even the natives did not have an explanation for the big statues that were there some of the statues were not even nished and just left behind just to produce one statue you need about 20 workers you would also need about 25 more food to feed the workers no tree and no birds on the island there are stories about cannibalism on the island WHAT HAPPENED pollen record was analyzed and found that plant environment was way different then what it was when humans arrived wine palm tree alphitonia triumfetta Malay apple psydrax thespesia a lot of birds in the past albatross tuna dolphin rats other sh species shell sh seals lizards Trees disappeared because the people cut the all down rats follow humans no longer can make canoes birds leave because no trees and over hunted ran out of all forms of food and turned to cannibalism Global climate Sea cores there is sediment at the bottom of the ocean is mostly made of tiny organism we can make assumptions about climate based on the organism that are at the bottom of the ocean temperature of surface of the ocean affects the species of the organism living in surface water foraminiferan are used to test climate have a shell made of calcium carbonate preserves well and temp effects cell coils to right during hot and left during cold climate effects chemical composition of shell We use uctuations in lightheavy oxygen in foraminiferan shell to track climate change 016 is light 018 is heavy changes because of evaporation light evaporate easier and condensation heavy condensates easier chemical composition re ects the composition of the water because there is an 0 molecule in the shell allows us to reconstruction climate for 2 or 3 million year ago Ice cores same thing but with ice they grow annually because each year a new layer is placed follow year by year what the temperature was Coral cores another version We have lived in a stable climate for 10000 years but it was changing for a long time Reconstructing Plant environments Vegetation changes as the climate changes especially in the mountains hardiness zones are shifting with climate change climate changes and therefore the zones move plant communities respond pretty rapidly climate change Plant remains nd a lot like water log places human stomach caves and feces 0 Macrobotantical remains seeds amp fruits otation systems are used to nd plant debris and seeds plant residues wood charcoal soil can be stained fossil pack rat nests pack rats do not travel far from their nests and therefore their nests can be a time capsule and give a good example of what kind of plants they collected 0 Microbotanical remains Palynology pollen analysis most informative method plants are shedding pollen into the atmosphere can survive for thousands of years take a sample bring it back and pollen is extracted using acid baths pollen curve different species of trees and time and the thickness represents a proportion of pollen shows that the pollen today is not even close to the pollen from 14000 years ago Cloud mnr After evaporati
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