Author: Gregory P. ZoggPublisher:
ISBN:
Category :
Languages : en
Pages : 182
Book Description
Belowground Carbon Dynamics in Northern Hardwood Forests
Author: Gregory P. ZoggDrivers of Soil Organic Carbon in Rich Northern Hardwood Forests
Author: Sophia Rebecca MarinacePublisher:
ISBN:
Category : Earthworms
Languages : en
Pages : 0
Book Description
Forests are increasingly being managed for their carbon sequestration potential. As such, an understanding of the factors controlling carbon dynamics across and within sites is becoming increasingly important for guiding carbon management strategies. Given that much of a forest's carbon is stored in soils, identifying the factors that control how much carbon is stored in soils is critical. This study used detailed vegetation and soil measurements across a rich northern hardwood forest in Corinth, Vermont to identify factors that drive soil carbon storage in a northern hardwood forest, a common type in New England, and investigated how multiple non-native species might impact these factors. These forests have a large component of white ash (Fraxinus americana), a species threatened by the invasive emerald ash borer (Agrilus planipennis), creating an urgency to assess how ash trees influence soil organic carbon sequestration, as well as how their mortality may impact future carbon dynamics. Furthermore, non-native earthworms, which have a large impact of forest floor and soil carbon, are impacting these systems. This work quantified how these stressors are affecting carbon storage and tree regeneration. Analysis of organic litter material and mineral soil samples from these areas indicate both earthworms and overstory ash basal area significantly impact leaf litter nitrogen content and leaf litter carbon to nitrogen ratio (C:N); however, there was no interaction between the two factors. Earthworms also significantly decreased soil pH, however it is difficult to disentangle if earthworms are drawn to higher pH areas or if they create these conditions. Conversely, basal area of white ash had a significant, increasing effect on leaf litter pH. Soil pH was the best predictor of soil carbon in the upper soil horizons, and carbon to nitrogen ratio (C:N) in the forest floor was best explained by the interaction of litter pH and earthworm prevalence. Collectively, these results suggest both earthworm and emerald ash borer may alter soil carbon and nutrient dynamics in rich northern hardwood forests and the pathways by which carbon is stored.
Modeling Spatial and Temporal Patterns of Soil Organic Carbon in Two Montane Landscapes
Author: Kristofer Dee JohnsonPublisher:
ISBN:
Category :
Languages : en
Pages : 356
Book Description
Forest soils contribute to a significant portion of the world's carbon flux due to both natural and anthropogenic changes. In terms of human management of carbon pools, forest soil organic matter (SOM) is important because it potentially stores carbon more permanently than living vegetation. Yet, this potential is poorly understood or managed for because of the difficulty in measuring changes in SOM pools over time and space. Modeling combined with intensive field sampling can help overcome these limitations because it extracts from empirically observed relationships to account for the components of SOM formation (topography, time, parent material, organisms and climate [fns2] ). This study utilizes intensive field data, statistical models and process-based ecosystem models to investigate the spatial distribution and dynamics of soil organic carbon dynamics in two contrasting ecosystems--the northern hardwood forest in the Green Mountains, VT and the tabonuco forest in the Luquillo Experimental Forest, PR. In both forests landscape position emerged as the dominate factor in explaining SOM distribution. In Vermont, additional variation was explained by aspect and slope and in Puerto Rico additional variation was explained by landscape factors interrelated to soil drainage. Process-based modeling proved to be a useful management and experimental tool in cases were empirical approaches were impractical for both forests. In Vermont, three ecosystem models demonstrated a substantial reduction of soil organic carbon and harvestable biomass due to the removal of woody carbon by logging after 240 years of rotations. In Puerto Rico, the Century model showed that changes in litter quality and quantity were not likely responsible in explaining landscape level SOM differences. Overall, well drained soils located in colder climates stored the highest SOM whereas poorly drained and highly disturbed soils in steep humid climates stored the lowest SOM. This research demonstrates that although SOM amounts are highly variable over many spatial and temporal scales, intuitive relationships are borne out with modeling tools and by careful investigation of the five soil forming factors. Results also raise questions about how these ecosystems and their SOM pools may change in response to changing climate conditions of the future.
Soil Carbon Dynamics & Carbon Markets with Emissions Offsets
Author: Samuel C. RossCarbon Dynamics of Northern Hardwood Forests
Author: Thomas W. JurikPublisher:
ISBN:
Category : Atmospheric carbon dioxide
Languages : en
Pages : 82
Book Description
Soil Carbon Dynamics
Author: Werner L. KutschPublisher: Cambridge University Press
ISBN: 1139483161
Category : Technology & Engineering
Languages : en
Pages : 301
Book Description
Carbon stored in soils represents the largest terrestrial carbon pool and factors affecting this will be vital in the understanding of future atmospheric CO2 concentrations. This book provides an integrated view on measuring and modeling soil carbon dynamics. Based on a broad range of in-depth contributions by leading scientists it gives an overview of current research concepts, developments and outlooks and introduces cutting-edge methodologies, ranging from questions of appropriate measurement design to the potential application of stable isotopes and molecular tools. It includes a standardised soil CO2 efflux protocol, aimed at data consistency and inter-site comparability and thus underpins a regional and global understanding of soil carbon dynamics. This book provides an important reference work for students and scientists interested in many aspects of soil ecology and biogeochemical cycles, policy makers, carbon traders and others concerned with the global carbon cycle.
Carbon Dioxide, Methane and Nitrous Oxide Dynamics in a Northern Hardwood Forest Under Experimental Manipulation of Soil Temperature
Author: Patrick J. McHalePublisher:
ISBN:
Category : Carbon dioxide
Languages : en
Pages : 212
Book Description
Fine Root Dynamics in a Northern Hardwood Forest
Author: Geraldine Lucia TierneyPublisher:
ISBN:
Category :
Languages : en
Pages : 266
Book Description
Carbon Dynamics in a Seasonally Dry Tropical Forest
Author: Rodrigo Vargas RamosPublisher:
ISBN:
Category : Forest biomass
Languages : en
Pages : 368
Book Description
A Model of Forest Floor Carbon Mass for United States Forest Types
Author: James E. SmithPublisher:
ISBN:
Category : Carbon cycle (Biogeochemistry)
Languages : en
Pages : 44
Book Description