Download Amazon: Pollen Manual and Atlas by Paul A Collinvaux, Paulo E. De Oliveira, Enrique Moreno PDF

By Paul A Collinvaux, Paulo E. De Oliveira, Enrique Moreno

Amazon will end up a strong device for ecologists and weather modelers. It additionally includes short experiences of pioneering pollen paintings within the Amazon so far; sections on pollen equipment, pollen facts, paleoecology, and lake coring tools.

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Extra resources for Amazon: Pollen Manual and Atlas

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Pollen preservation is usually excellent in lake sediments. Sedimentation rates are often constant over long periods, thus allowing sedimentation rates to be accurately measured with an adequate array of AMS radiocarbon dates, which in turn allows calculation of pollen influx. Lake sediments are less susceptible to postdepositional disturbance than other deposits. ) are more likely to be valuable in lake deposits than in bogs or soils. And, in the Amazon, lake sediments are the only likely sink for animal dispersed pollen moved from the local watershed in runoff water.

Fossil sand dunes in the Orinoco, the mid Rio São Francisco and in various parts of northeastern Brazil are all outside the Amazon basin. , 1999, in press). Thus the preponderance of the evidence is that most of the Amazon lowlands remained forested in the ice-ages although precipitation was reduced. We should expect subtle changes in forest composition in the drier times. This, meanwhile, is our working model of the environment of the ice-age Amazon. Carbon dioxide and temperature were both down.

Sedimentation rates are often constant over long periods, thus allowing sedimentation rates to be accurately measured with an adequate array of AMS radiocarbon dates, which in turn allows calculation of pollen influx. Lake sediments are less susceptible to postdepositional disturbance than other deposits. ) are more likely to be valuable in lake deposits than in bogs or soils. And, in the Amazon, lake sediments are the only likely sink for animal dispersed pollen moved from the local watershed in runoff water.

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