Modelling analysis of potential carbon sequestration in selected forest types

1995 ◽  
Vol 25 (7) ◽  
pp. 1157-1172 ◽  
Author(s):  
G.J. Nabuurs ◽  
G.M.J. Mohren
Keyword(s):  
Carbon Sequestration ◽  
Carbon Fixation ◽  
Forest Type ◽  
Forest Products ◽  
Wood Products ◽  
Forest Types ◽  
Political Issue ◽  
Annual Carbon ◽  
Carbon Sequestering

Ten selected forest types were examined (1) to assess the carbon sequestering potential of those forest types that are most likely to be successful in sequestering atmospheric carbon, (2) to show the relevance of varying carbon sequestering criteria, and (3) to present a method as a possible standard for carbon sequestering assessments. The carbon sequestering potential of the forest, forest soils, and forest products was quantified with the dynamic model CO2FIX. Two main criteria for evaluation of the carbon sequestering capacity were used: (1) the long-term average stock of carbon in the forest biomass and wood products and (2) the average net annual carbon storage flux during the first rotation. It was found that selectively logged evergreen rain forests may contain the largest long-term average stock of carbon in the biomass and products, with 207 Mg C•ha−1. The highest net annual carbon fixation in the first rotation was achieved with Pinusradiata D. Don in Brazil, with a storage rate of 5.3 Mg C•ha−1•year−1 on fertile sites. These values can be regarded as maximum boundaries for carbon sequestration. Evaluation of carbon sequestration in forests should always be carried out with a set of varying carbon sequestering criteria. Such an evaluation should also take into account socioeconomic and ecological criteria. It remains a political issue which criterion prevails over the other. A study to improve the model by linking it to forest type area tables is in preparation. It will then be possible to present projections of carbon sequestration for a region or country.

scholarly journals Impacts of Fire on Forest Biomass Dynamics at the Southern Amazon Edge

2019 ◽  
Vol 46 (4) ◽  
pp. 285-292 ◽  
Author(s):  
Denis S Nogueira ◽  
Beatriz S Marimon ◽  
Ben Hur Marimon-Junior ◽  
Edmar A Oliveira ◽  
Paulo Morandi ◽  
...  
Keyword(s):  
Environmental Change ◽  
Forest Type ◽  
Forest Biomass ◽  
Riparian Forests ◽  
Environmental Drivers ◽  
Biomass Carbon ◽  
Forest Types ◽  
Change Rate ◽  
Biomass Dynamics

SummaryOver recent decades, biomass gains in remaining old-growth Amazonia forests have declined due to environmental change. Amazonia’s huge size and complexity makes understanding these changes, drivers, and consequences very challenging. Here, using a network of permanent monitoring plots at the Amazon–Cerrado transition, we quantify recent biomass carbon changes and explore their environmental drivers. Our study area covers 30 plots of upland and riparian forests sampled at least twice between 1996 and 2016 and subject to various levels of fire and drought. Using these plots, we aimed to: (1) estimate the long-term biomass change rate; (2) determine the extent to which forest changes are influenced by forest type; and (3) assess the threat to forests from ongoing environmental change. Overall, there was no net change in biomass, but there was clear variation among different forest types. Burning occurred at least once in 8 of the 12 riparian forests, while only 1 of the 18 upland forests burned, resulting in losses of carbon in burned riparian forests. Net biomass gains prevailed among other riparian and upland forests throughout Amazonia. Our results reveal an unanticipated vulnerability of riparian forests to fire, likely aggravated by drought, and threatening ecosystem conservation at the Amazon southern margins.

Carbon Sequestration Due to Commercial Forestry: An Equilibrium Analysis

2020 ◽  
Vol 70 (1) ◽  
pp. 60-63
Author(s):  
Craig Loehle
Keyword(s):  
Carbon Sequestration ◽  
Half Life ◽  
Wood Products ◽  
Equilibrium Analysis ◽  
Wood Product ◽  
Waste Wood ◽  
Large Spatial Scale ◽  
Climate Change Risks ◽  
Time Frames

Abstract Carbon sequestration is one of the tools being used to respond to climate change risks. It is known that carbon stored in wood products is a type of sequestration. However, time frames for evaluating wood use can affect conclusions about sequestration benefits; a long-term perspective and large spatial scale may help clarify these issues. Therefore, I undertook an equilibrium analysis of ongoing commercial forestry operations, relative to carbon sequestration, at the landscape scale. I found that for simple exponential decay functions for wood remaining in use over time, the total sequestered wood at equilibrium is simply the integral of the decay function multiplied by wood product produced. I show that this simple multiplier is a linear function of half-life. For a 50-year wood half-life, this equilibrium multiplier is 72.1. The half-life depends on the specific wood product (lumber, etc.). For waste wood used for energy at mills, typical values yielded a 100-year sequestration (avoided emissions) value of 12H where H is tons of carbon in logs delivered to the mill. This exercise demonstrates that commercial forestry is a significant provider of carbon sequestration through wood products, in addition to other sequestration benefits. The simple multipliers developed here are intuitive and can be easily used with operational wood product data at any scale.

Evaluation of a mechanistic approach to mixedwood modelling

2008 ◽  
Vol 84 (2) ◽  
pp. 181-193 ◽  
Author(s):  
B. Seely ◽  
C. Hawkins ◽  
J A Blanco ◽  
C. Welham ◽  
J P Kimmins
Keyword(s):  
Species Interactions ◽  
Resource Competition ◽  
Forest Type ◽  
Forest Growth ◽  
Nutrient Competition ◽  
Forest Types ◽  
Support Tool ◽  
Management Interventions ◽  
Forest Growth Model

Mixed conifer–broadleaf forests (mixedwoods), covering more than a third of the productive forest landbase in BC, are highly valuable both as sources of fibre and as areas rich in biodiversity. In recognition of the multiple benefits of this forest type, management paradigms have transitioned from a focus on promoting conifer plantations in mixedwood areas to the management of intimate mixtures. The exceptionally dynamic growth properties and species interactions in mixedwood forests present a challenge for projecting the growth and development of different types of mixedwoods and their response to different silviculture systems. Here we evaluate the ability of a mechanistic forest growth model (FORECAST) to project patterns of stand growth and dynamics in two mixedwood forest types subjected to different silvicultural treatments. Model output is compared against field measurements from long-term silviculture trials in the Sub Boreal Spruce (SBS)—18 years, and Interior Cedar Hemlock (ICH)—10 years, biogeoclimatic zones in British Columbia, Canada. FORECAST was able to reproduce patterns of growth response in both mixedwood forest types with reasonable accuracy. An analysis of the simulated relative impact of light and nutrient competition on growth dynamics and treatment response is provided. Results suggest that competition for both light and nutrients are important factors in the dynamics of these mixedwood forest types and that long-term response data and modelling are required to adequately assess the rotation-length effects of treatments on stand development. The analysis described herein provides a level of confidence for the use of the model as a decision-support tool in these ecosystem types, but more validation work should be conducted across a range of different mixedwood forest types and management interventions as long-term datasets become available. Key words: FORECAST, mixedwood management, model testing, process-based model, resource competition

scholarly journals Long-Term Impact of Transhumance Pastoralism and Associated Disturbances in High-Altitude Forests of Indian Western Himalaya

2021 ◽  
Vol 13 (22) ◽  
pp. 12497
Author(s):  
Shiekh Marifatul Haq ◽  
Umer Yaqoob ◽  
Eduardo Soares Calixto ◽  
Manoj Kumar ◽  
Inayat Ur Rahman ◽  
...  
Keyword(s):  
Species Composition ◽  
Plant Species ◽  
Vegetation Index ◽  
Forest Type ◽  
Western Himalaya ◽  
Plant Species Composition ◽  
Forest Types ◽  
Significant Difference ◽  
Fire Incidence

The Himalayan Mountains are geodynamical important, featuring a wide climatic range with a rich diversity of flora, fauna, human communities, culture, and social set-up. In recent decades, due to constant anthropogenic pressure and considerable changes witnessed in the climate of the region, species of this region are threatened. Here, we assessed the impact of nomadic settlement and associated disturbances on plant species composition, diversity parameters, ecosystem properties, and fire incidence in high-altitude forests of Western Himalaya, India. Based on the distance between nomadic settlement location and forest, we classified forest as near nomadic settlement (NNS) or away nomadic settlement (ANS) forest types. We found a significant variation in plant species composition between forest types. Three species, namely, Sibbaldia cuneata, Poa annua, and Abies pindrow, contribute 25% of the cumulative variation in plant species composition. Studying live plants, we found a significant difference only for density, in which ANS had a higher average density than NNS. Considering dead plants, we found a significant difference in all nine plant-related parameters evaluated between sites. NNS had a higher value of all parameters evaluated, except for height, which was higher in ANS sites. ANS forest type show 1.3 times more average carbon stock (160.39 ± 59.03 MgCha−1; mean ± SD) than NNS forest type (120.40 ± 51.74 MgCha−1). We found a significant difference in plant diversity evaluated between forest types. ANS had higher values of Margalef and Fisher diversity but lower values of evenness. We found that NSS had significantly higher values of fire incidences, whereas ANS has a higher normalized differential vegetation index and enhanced vegetation index. Overall, our study showed that species composition, diversity, and fire incidence are strongly impacted due to nomadic settlements. These findings are paramount for designing appropriate livelihood options for indigenous communities and management policies of the long-term forest harvest to achieve global goals and the UN Decade on Ecosystem Restoration targets (2021–2030) to protect the sustainable development of forest mountainous regions.

Examination of moisture content variation within an operational wet deck

TAPPI Journal ◽  
2013 ◽  
Vol 12 (1) ◽  
pp. 45-50 ◽  
Author(s):  
LAURENCE SCHIMLECK ◽  
KIM LOVE-MYERS ◽  
JOE SANDERS ◽  
HEATH RAYBON ◽  
RICHARD DANIELS ◽  
...  
Keyword(s):  
Moisture Content ◽  
Southeastern United States ◽  
Forest Products ◽  
Time Domain Reflectometry ◽  
Water Application ◽  
Wood Moisture ◽  
International Paper ◽  
Content Variation ◽  
Moisture Variation

Many forest products companies in the southeastern United States store large volumes of roundwood under wet storage. Log quality depends on maintaining a high and constant wood moisture content; however, limited knowledge exists regarding moisture variation within individual logs, and within wet decks as a whole, making it impossible to recommend appropriate water application strategies. To better understand moisture variation within a wet deck, time domain reflectometry (TDR) was used to monitor the moisture variation of 30 southern pine logs over an 11-week period for a wet deck at the International Paper McBean woodyard. Three 125 mm long TDR probes were inserted into each log (before the deck was built) at 3, 4.5, and 7.5 m from the butt. The position of each log within the stack was also recorded. Mixed-effects analysis of variance (ANOVA) was used to examine moisture variation over the study period. Moisture content varied within the log, while position within the stack was generally not significant. The performance of the TDR probes was consistent throughout the study, indicating that they would be suitable for long term (e.g., 12 months) monitoring.

The Value of a Tree: Comparing Carbon Sequestration to Forest Products

Science Scope ◽  
2014 ◽  
Vol 037 (07) ◽  
Author(s):  
Jennifer Schon ◽  
R. Hougham ◽  
Karla Bradley Eitel ◽  
Steve Hollenhorst
Keyword(s):  
Carbon Sequestration ◽  
Forest Products

The political economy of English public services reform and implications for management knowledges in health care organizations

2018 ◽  
Author(s):  
Ewan Ferlie ◽  
Sue Dopson ◽  
Chris Bennett ◽  
Michael D. Fischer ◽  
Jean Ledger ◽  
...  
Keyword(s):  
Political Economy ◽  
Public Management ◽  
Public Services ◽  
New Public Management ◽  
Health Care Organizations ◽  
Public Agencies ◽  
Political Issue ◽  
Management Reform ◽  
New Public

This chapter explores, in greater depth, the idea floated in the Introduction that the macro-level political economy of public services reform can exert effects on preferred management knowledges at both national and local levels. We argue that an important series of New Public Management reforms evident since the 1980s have made UK public agencies more ‘firm like’ and receptive to firm-based forms of management knowledge. We characterize key features of the UK’s long-term public management reform strategy, benchmarking it against, and also adding to, Pollitt and Bouckaert’s well-known comparativist typology. We specifically add to their model a consideration of the extent to which public management reform is constructed as a top-level political issue.

scholarly journals Non-Destructive Lumber and Engineered Pine Products Research in the Gulf South U.S. 2005–2020

Forests ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 91
Author(s):  
R. Dan Seale ◽  
Rubin Shmulsky ◽  
Frederico Jose Nistal Franca
Keyword(s):  
Agricultural Research ◽  
Forest Products ◽  
Wood Products ◽  
Time Interval ◽  
Mississippi State University ◽  
State University ◽  
White Oak ◽  
Department Of Agriculture ◽  
Mass Timber ◽  
Structural Lumber

This review primarily describes nondestructive evaluation (NDE) work at Mississippi State University during the 2005–2020 time interval. Overall, NDE is becoming increasingly important as a means of maximizing and optimizing the value (economic, engineering, utilitarian, etc.) of every tree that comes from the forest. For the most part, it focuses on southern pine structural lumber, but other species such as red pine, spruce, Douglas fir, red oak, and white oak and other products such as engineered composites, mass timber, non-structural lumber, and others are included where appropriate. Much of the work has been completed in conjunction with the U.S. Department of Agriculture, Forest Service, Forest Products Laboratory as well as the Agricultural Research Service with the overall intent of improving lumber and wood products standards and valuation. To increase the future impacts and adoption of this NDE-related work, wherever possible graduate students have contributed to the research. As such, a stream of trained professionals is a secondary output of these works though it is not specifically detailed herein.

scholarly journals Imitated Whole Tree Harvesting Show Negligible Effect on Economic Value of Spruce Stands

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 841
Author(s):  
Iveta Desaine ◽  
Annija Kārkliņa ◽  
Roberts Matisons ◽  
Anna Pastare ◽  
Andis Adamovičs ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Economic Value ◽  
Forest Types ◽  
Spruce Stands ◽  
The Difference ◽  
Growing Conditions ◽  
Whole Tree Harvesting ◽  
Whole Tree ◽  
Tree Harvesting

The increased removal of forest-derived biomass with whole-tree harvesting (WTH) has raised concerns about the long-term productivity and sustainability of forest ecosystems. If true, this effect needs to be factored in the assessment of long-term feasibility to implement such a drastic forest management measure. Therefore, the economic performance of five experimental plantations in three different forest types, where in 1971 simulated WTH event occurred, was compared with pure, planted and conventionally managed (CH) Norway spruce stands of similar age and growing conditions. Potential incomes of CH and WTH stands were based on timber prices for period 2014–2020. However, regarding the economics of root and stump biomass utilization, they were not included in the estimates. In any given price level, the difference of internal rate of return between the forest types and selected managements were from 2.5% to 6.2%. Therefore, Norway spruce stands demonstrate good potential of independence regardless of stump removal at the previous rotation.

Sign in / Sign up

Export Citation Format

Share Document