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- W2338244112 endingPage "64" @default.
- W2338244112 startingPage "52" @default.
- W2338244112 abstract "A sedimentary record from the Peruvian Amazon provided evidence of climate and vegetation change for the last 6900 years. Piston cores collected from the center of Lake Sauce, a 20 m deep lake at 600 m elevation, were 19.7 m in length. The fossil pollen record showed a continuously forested catchment within the period of the record, although substantial changes in forest composition were apparent. Fossil charcoal, found throughout the record, was probably associated with humans setting fires. Two fires, at c. 6700 cal BP and 4270 cal BP, appear to have been stand-replacing events possibly associated with megadroughts. The fire event at 4270 cal BP followed a drought that caused lowered lake levels for several centuries. The successional trajectories of forest recovery following these large fires were prolonged by smaller fire events. Fossil pollen of Zea mays (cultivated maize) provided evidence of agricultural activity at the site since c. 6320 cal BP. About 5150 years ago, the lake deepened and started to deposit laminated sediments. Maize agriculture reached a peak of intensity between c. 3380 and 700 cal BP. Fossil diatom data provided a proxy for lake nutrient status and productivity, both of which peaked during the period of maize cultivation. A marked change in land use was evident after c. 700 cal BP when maize agriculture was apparently abandoned at this site. Iriartea, a hyperdominant of riparian settings in western Amazonia, increased in abundance within the last 1100 years, but declined markedly at c. 1070 cal BP and again between c. 80 and −10 cal BP." @default.
- W2338244112 created "2016-06-24" @default.
- W2338244112 creator A5000338590 @default.
- W2338244112 creator A5007211642 @default.
- W2338244112 creator A5024861960 @default.
- W2338244112 creator A5034949369 @default.
- W2338244112 creator A5043323017 @default.
- W2338244112 creator A5044765974 @default.
- W2338244112 creator A5052456169 @default.
- W2338244112 creator A5069414001 @default.
- W2338244112 creator A5088955961 @default.
- W2338244112 date "2016-06-01" @default.
- W2338244112 modified "2023-10-17" @default.
- W2338244112 title "A 6900-year history of landscape modification by humans in lowland Amazonia" @default.
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