A Holocene record of climate change,fire ecology and human activity from montane Flat Top Bog,Maui |
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Authors: | D A Burney R V DeCandido L P Burney F N Kostel-Hughes T W Stafford Jr H F James |
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Institution: | (1) Department of Biological Sciences, Fordham University, 10458 Bronx, NY, USA;(2) Institute of Arctic and Alpine Research, University of Colorado, 80309-0450 Boulder, CO, USA;(3) MRC NHB 116, National Museum of Natural History, Smithsonian Institution, 20560 Washington, DC, USA |
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Abstract: | A sediment core from a high-elevation bog on Maui in the Hawaiian Islands contains evidence for drier conditions between 9.4–5.8 kyr BP, followed by a wetter interval between 5.8–2.2 kyr BP, and a variable late Holocene. These precipitation changes may be a reflection of vertical displacements of the upper boundary of the mid-Pacific Trade Wind Inversion (TWI) cloud layer. Fires, probably volcanically ignited, occurred in the forests prior to human arrival. Polynesian activity in this high-elevation, remote site was apparently limited, with no pollen, charcoal, or sedimentological evidence for local anthropogenic disturbance. After European contact, grass fires increased and introduced plant species invaded the site. Values for Cd, Cu, Pb, and Zn in sediments throughout the Holocene indicate low trace-metal deposition from atmospheric particulates at the site, even in the twentieth century.This paper is one of a series of papers guest edited by Dr. Mark Brenner on tropical paleolimnology |
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Keywords: | Hawaii pollen fire ecology trace metals Trade Wind Inversion paleoecology |
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