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Sometimes one dollar protects one acre of rainforest, and sometimes it protects twenty acres of rainforest.
Originally posted by dave_54
It is all a cycle. Whether humans are a part of the cycle or not is irrelevant.
Ancient sediments show rain forests covered Amazon basin in last ice age
Radiocarbon dating and pollen analysis of sediments from a small lake in Brazil indicate that the western Amazon River basin was covered with lush, tropical rain forest 14,000 to 30,000 years ago—a time when glaciers covered the northern latitudes and most scientists believed the Amazon basin was a vast, dry grassland. The research is significant because it is the first direct, dated physical evidence from anywhere in the lowland rain forest of the Amazon basin indicating the type of climate in this region during the last ice age.
"These data will come as quite a shock to many paleoclimatologists," Paul Colinvaux, senior scientist at the Smithsonian Tropical Research Institute in Panama and leader of the study, says. "They contradict the widespread belief that a drier climate during the last ice age turned the Amazon lowlands into a savanna with isolated pockets of rain forest." Colinvaux also serves as a research scientist at the University of Michigan's Center for Great Lakes and Aquatic Sciences.
Colinvaux and colleagues at STRI, Duke University and the Field Museum in Chicago based their conclusions on a 7-meter-long (23-foot-long) sediment core they drilled from the bottom of Lake Pata, which is located in the dense tropical Amazon rain forest of northwestern Brazil. Radiocarbon dating of material in the undisturbed sediment layers confirmed that the top 1.6 meters (5 feet) were deposited on the bottom of Lake Pata between 14,200 and 30,800 years ago—the time of maximum glacial coverage in the last ice age.
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Originally posted by loam
Originally posted by dave_54
It is all a cycle. Whether humans are a part of the cycle or not is irrelevant.
Now there is some logic you can bank with....
Death is part of a cycle too...but I sincerely doubt our criminal system would consider the one holding the knife irrelevant.
Oh, and the part about 5000 years ago:
Ancient sediments show rain forests covered Amazon basin in last ice age
Radiocarbon dating and pollen analysis of sediments from a small lake in Brazil indicate that the western Amazon River basin was covered with lush, tropical rain forest 14,000 to 30,000 years ago—a time when glaciers covered the northern latitudes and most scientists believed the Amazon basin was a vast, dry grassland. The research is significant because it is the first direct, dated physical evidence from anywhere in the lowland rain forest of the Amazon basin indicating the type of climate in this region during the last ice age.
"These data will come as quite a shock to many paleoclimatologists," Paul Colinvaux, senior scientist at the Smithsonian Tropical Research Institute in Panama and leader of the study, says. "They contradict the widespread belief that a drier climate during the last ice age turned the Amazon lowlands into a savanna with isolated pockets of rain forest." Colinvaux also serves as a research scientist at the University of Michigan's Center for Great Lakes and Aquatic Sciences.
Colinvaux and colleagues at STRI, Duke University and the Field Museum in Chicago based their conclusions on a 7-meter-long (23-foot-long) sediment core they drilled from the bottom of Lake Pata, which is located in the dense tropical Amazon rain forest of northwestern Brazil. Radiocarbon dating of material in the undisturbed sediment layers confirmed that the top 1.6 meters (5 feet) were deposited on the bottom of Lake Pata between 14,200 and 30,800 years ago—the time of maximum glacial coverage in the last ice age.
More...
[edit on 19-6-2006 by loam]
Originally posted by dave_54
One study does not truth make.
Widespread acceptance of an "arid Amazon grassland" during the ice age was based on the existence of ancient sand dunes and deposits of windblown dust found in parts of South America north and south of the Amazon River basin, Colinvaux says. "Evidence of aridity in other areas was simply extrapolated to include the Amazon. With no data to the contrary, there was no reason to question the assumption."
Originally posted by dave_54
And your post still validates mine. 14,000 years ago it was jungle, 5000 years ago a savannah, then jungle again. A cycle.
Originally posted by Shadow88
I don't believe one person can make a difference, but i am a firm believer that he/she can be the first domino.
14,000 years ago it was jungle, 5000 years ago a savannah, then jungle again. A cycle.
Originally posted by Shadow88
Ok perhaps the rainforest does fade away to a savannah every thousand/million year cycle, i cant deny the theory unless disproved.
HOWEVER
Riddle me this: Where do the 6 billion+ extra people not present at the last cycle get there oxygen once we have cut down all the rainforests?
[edit on 20-6-2006 by Shadow88]
Originally posted by ShadowXIX
I really think a single person could make a difference you just need alot of money. The land is dirt cheap down there imagine if Bill Gates decided instead of investing those billions he poured into 3rd world AIDs problems bought land in the Amazon with that money instead. He could have bought millions and millions of square acres.