Manies, Kristen L.

51 items:

Recent acceleration of biomass burning and carbon losses in Alaskan forests and peatlands Climate change has increased the area affected by forest fires each year in boreal North America. Increases in burned area and fire frequency are expected to stimulate boreal carbon losses. However, the impact of wildfires on carbon emissions is also affected by the severity of burning. How climate change influences the severity of biomass burning has proved difficult to assess. Here, we examined the depth of ground-layer combustion in 178 sites dominated by black spruce in Alaska, using data collected from 31 fire events between 1983 and 2005. We show that the depth of burning increased as the fire season progressed when the annual area burned was small. However, deep burning occurred throughout the fire season... Categories: Publication; Types: Citation; Tags: Monitoring 5-Physical Science
Soil data from different-age Picea mariana stands near Delta Junction, Alaska of different ages and soil drainage type The U.S. Geological Survey project Fate of Carbon in Alaskan Landscapes(FOCAL) is studying the effect of fire and soil drainage on soil carbon storage in the boreal forest. This project has selected several sites to study within central Alaska of varying ages (time since fire) and soil drainage types. This report describes the location of these sampling sites, as well as the procedures used to describe, sample, and analyze the soils. This report also contains data tables with this information, including, but not limited to field descriptions, bulk density, particle size distribution, moisture content, carbon (C) concentration, nitrogen (N) concentration, isotopic data for C, and major, minor and trace elemental... Categories: Publication; Types: Citation; Tags: M1-Ecosystems
Effects of wildfire and permafrost on soil organic matter and soil climate in interior Alaska Categories: Publication; Types: Citation; Tags: M3-Improve Permafrost Mapping, Modeling, R2b-Effects of Fire on Ecosystems, and Monitoring
Soils, vegetation, and woody debris data from the 2001 Survey Line fire and a comparable unburned site, Tanana Flats region, Alaska Categories: Publication; Types: Citation
Interactive Effects of Fire, Soil Climate, and Moss on CO2 Fluxes in Black Spruce Ecosystems of Interior Alaska Fire is an important control on the carbon (C) balance of the boreal forest region. Here, we present findings from two complementary studies that examine how fire modifies soil organic matter properties, and how these modifications influence rates of decomposition and C exchange in black spruce (Picea mariana) ecosystems of interior Alaska. First, we used laboratory incubations to explore soil temperature, moisture, and vegetation effects on CO2 and DOC production rates in burned and unburned soils from three study regions in interior Alaska. Second, at one of the study regions used in the incubation experiments, we conducted intensive field measurements of net ecosystem exchange (NEE) and ecosystem respiration... Categories: Publication; Types: Citation; Tags: R1-Vulnerability Forest Species and Communities to Climate Change, R2b-Effects of Fire on Ecosystems

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