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Partitioning Soil Carbon Dioxide Efflux through Vertical Profiles
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Soil efflux (SEF) is an important component in the globalcarbon cycle. The combination of root and microbial respiration,SEF is often used as a measure of biological productivity in thesoil. Although SEF has been widely studied, some areas have beenneglected, including the effect of timber harvest management on SEFand SEF in different soil horizons. Timber harvesting compacts thesoil, removes standing vegetation, increases debris, alters themicroclimate, etc., all of which could potentially alter SEF. TheMissouri Ozark Forest Ecosystem Project (MOFEP) is a long-termstudy in which the Missouri Department of Conservation (MDC)installed experiments of single-tree uneven-age (UAM), clear-cuteven-age (EAM), and control no-cut (NHM) timber harvests to findecosystem-management alternatives. To determine the effect oftimber harvest on subsurface SEF, nine soil pits, three in eachtreatment, were dug to directly measure the magnitude of changes inSEF across the soil profile.
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