Carbon Stocks in Dead Wood Biomass of Savannah Ecosystems in Northern Region Cameroon

Victor Awe Djongmo; Valery Noiha Noumi; Louis Zapfack; Davy Ali Ahmed; Chantal Madou

doi:10.36959/771/562

Dead wood biomass and turnover time, measured by radiocarbon, along a subalpine elevation gradient

Oecologia ◽

10.1007/s00442-004-1689-x ◽

2004 ◽

Vol 141 (4) ◽

pp. 641-651 ◽

Cited By ~ 105

Author(s):

Lara M. Kueppers ◽

John Southon ◽

Paul Baer ◽

John Harte

Keyword(s):

Dead Wood ◽

Elevation Gradient ◽

Turnover Time ◽

Wood Biomass

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Fire, drought and productivity as drivers of dead wood biomass in eucalypt forests of south-eastern Australia

Forest Ecology and Management ◽

10.1016/j.foreco.2020.118859 ◽

2021 ◽

Vol 482 ◽

pp. 118859

Author(s):

Jamie E. Burton ◽

Lauren T. Bennett ◽

Sabine Kasel ◽

Craig R. Nitschke ◽

Mihai A. Tanase ◽

...

Keyword(s):

Dead Wood ◽

Wood Biomass ◽

South Eastern ◽

Eastern Australia ◽

Eucalypt Forests ◽

South Eastern Australia

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Historical range of variability in live and dead wood biomass: a regional-scale simulation study

Canadian Journal of Forest Research ◽

10.1139/x07-064 ◽

2007 ◽

Vol 37 (11) ◽

pp. 2349-2364 ◽

Cited By ~ 9

Author(s):

Etsuko Nonaka ◽

Thomas A. Spies ◽

Michael C. Wimberly ◽

Janet L. Ohmann

Keyword(s):

Forest Structure ◽

Dead Wood ◽

Stand Structure ◽

Structural Characteristics ◽

Regional Scale ◽

Natural Disturbance ◽

Wood Biomass ◽

Historical Range Of Variability ◽

Coarse Filter ◽

Historical Range

The historical range of variability (HRV) in landscape structure and composition created by natural disturbance can serve as a general guide for evaluating ecological conditions of managed landscapes. HRV approaches to evaluating landscapes have been based on age-classes or developmental stages, which may obscure variation in live and dead stand structure. Developing the HRV of stand structural characteristics would improve the ecological resolution of this coarse-filter approach to ecosystem assessment. We investigated HRV in live and dead wood biomass in the regional landscape of the Oregon Coast Range by integrating stand-level biomass models and a spatially explicit fire simulation model. We simulated historical landscapes of the region for 1000 years under pre-Euro-American settlement fire regimes and calculated biomass as a function of disturbance history. The simulation showed that live and dead wood biomass historically varied widely in time and space. The majority of the forests historically contained 500–700 Mg·ha–1 (50–70 kg·m–2) of live wood and 50–200 Mg·ha–1 (5–20 kg·m–2) of dead wood. The current distributions are more concentrated in much smaller amounts for both biomass types. Although restoring the HRV of forest structure is not necessarily a management goal for most landowners and managing agencies, departure from the reference condition can provide relative measure to evaluate habitat conditions for managers seeking to use forest structure as a means to maintain or restore ecosystem and species diversity.

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Assessing the role of natural disturbance and forest management on dead wood dynamics in mixed-species stands of central Maine, USA

Canadian Journal of Forest Research ◽

10.1139/cjfr-2016-0177 ◽

2016 ◽

Vol 46 (9) ◽

pp. 1092-1102 ◽

Cited By ~ 5

Author(s):

Joshua J. Puhlick ◽

Aaron R. Weiskittel ◽

Shawn Fraver ◽

Matthew B. Russell ◽

Laura S. Kenefic

Keyword(s):

Forest Management ◽

Dead Wood ◽

Natural Disturbance ◽

Site Quality ◽

Stand Development ◽

Wood Biomass ◽

Clear Cut ◽

Live Tree ◽

Over Time

Dead wood pools are strongly influenced by natural disturbance events, stand development processes, and forest management activities. However, the relative importance of these influences can vary over time. In this study, we evaluate the role of these factors on dead wood biomass pools across several forest management alternatives after 60 years of treatment on the Penobscot Experimental Forest in central Maine, USA. After accounting for variation in site quality, we found significant differences in observed downed coarse woody material (CWM; ≥7.6 cm small-end diameter) and standing dead wood biomass among selection, shelterwood, and commercial clear-cut treatments. Overall, total dead wood biomass was positively correlated with live tree biomass and was negatively correlated with the average wood density of nonharvest mortality. We also developed an index of cumulative harvest severity, which can be used to evaluate forest attributes when multiple harvests have occurred within the same stand over time. Findings of this study highlight the dynamic roles of forest management, stand development, and site quality in influencing dead wood biomass pools at the stand level and underscore the potential for various outcomes from the same forest management treatment applied at different times in contrasting stands.

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Forest carbon stock in Left-bank Forest-Steppe of Ukraine according to intensive forest monitoring data

Наукові праці Лісівничої академії наук України ◽

10.15421/412011 ◽

2020 ◽

pp. 120-130

Author(s):

Volodymyr Pasternak ◽

Tetiana Pyvovar ◽

Volodymyr Yarotsky

Keyword(s):

Carbon Stock ◽

Dead Wood ◽

Carbon Stocks ◽

Total Carbon ◽

Forest Monitoring ◽

Carbon Pools ◽

Forest Steppe ◽

Left Bank ◽

Forest Stands ◽

Pine Stands

The issues of carbon stock and dynamic in different carbon pools in forest stands of Left-bank Forest-steppe of Ukraine are considered. The aim of the study was to evaluate carbon stocks and their changes in main pools: trees biomass and mortmass. Data of two repeated observations on 19 permanent intensive forest monitoring plots in Kharkiv and Sumy regions were used. Conversion method was used. Study of increment and mortality dynamics at monitoring plots showed, that two processes impact carbon balance: biotic damage which leads to trees dieback, and partial removal of dead wood from stands. Oak stands have, on average, higher carbon stock in trees biomass and mortmass (102.9 t С ha-1) than the pine stands (98.7 t С ha-1), which is associated with a higher representation of mature and overmature oak stands. While comparison by age classes showed that pine stands, in general, have higher values of C in trees biomass, due to higher productivity. The increase in carbon stocks with age is observed. The annual change of C stock in trees biomass is the highest in younger stands, and it decreases with age; while in mortmass it increases. Mature and overmature oak stands have negative trees biomass and positive dead wood growth. At age 81-100 years oak forest stands have higher carbon storage capacity than pine (total carbon stock in main pools (biomass, mortmass, litter and soils (30-cm layer)) is 191.7 t C ha-1 for oak and 175.4 t C ha-1 for pine stands). Trees biomass carbon prevails among other pools (50.3 % in oak forests, and 57.6% in pine), the next is soil carbon pool (45.9 and 29.0%, respectively). National forest inventory will provide data for assessments of carbon stocks and dynamics in trees biomass and mortmass pools. However, forest soil monitoring is necessary to evaluate carbon pools in soils and litter.

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Age-related and stand-wise estimates of carbon stocks and sequestration in the aboveground coarse wood biomass of wetland forests in the northern Pantanal, Brazil

Biogeosciences ◽

10.5194/bg-8-3407-2011 ◽

2011 ◽

Vol 8 (11) ◽

pp. 3407-3421 ◽

Cited By ~ 32

Author(s):

J. Schöngart ◽

J. Arieira ◽

C. Felfili Fortes ◽

E. Cezarine de Arruda ◽

C. Nunes da Cunha

Keyword(s):

Measurement Errors ◽

Cultural Landscape ◽

Tree Height ◽

C Sequestration ◽

Carbon Stocks ◽

Wood Biomass ◽

Allometric Models ◽

Age Related ◽

C Stocks ◽

Wetland Forests

Abstract. In this study we use allometric models combined with tree ring analysis to estimate carbon stocks and sequestration in the aboveground coarse wood biomass (AGWB) of wetland forests in the Pantanal, located in central South America. In four 1-ha plots in stands characterized by the pioneer tree species Vochysia divergens Pohl (Vochysiaceae) forest inventories (trees ≥10 cm diameter at breast height, D) have been performed and converted to estimates of AGWB by two allometric models using three independent parameters (D, tree height H and wood density ρ). We perform a propagation of measurement errors to estimate uncertainties in the estimates of AGWB. Carbon stocks of AGWB vary from 7.8 ± 1.5 to 97.2 ± 14.4 Mg C ha−1 between the four stands. From models relating tree ages determined by dendrochronological techniques to C-stocks in AGWB we derived estimates for C-sequestration which differs from 0.50 ± 0.03 to 3.34 ± 0.31 Mg C ha−1 yr−1. Maps based on geostatistic techniques indicate the heterogeneous spatial distribution of tree ages and C-stocks of the four studied stands. This distribution is the result of forest dynamics due to the colonizing and retreating of V. divergens and other species associated with pluriannual wet and dry episodes in the Pantanal, respectively. Such information is essential for the management of the cultural landscape of the Pantanal wetlands.

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Natural forests in New Zealand – a large terrestrial carbon pool in a national state of equilibrium

Forest Ecosystems ◽

10.1186/s40663-021-00312-0 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Thomas Paul ◽

Mark O. Kimberley ◽

Peter N. Beets

Keyword(s):

New Zealand ◽

Forest Inventory ◽

Carbon Stock ◽

Dead Wood ◽

Carbon Stocks ◽

Natural Forest ◽

Carbon Pool ◽

Total Carbon ◽

Natural Forests ◽

Sequestration Rate

Abstract Background Natural forests cover approximately 29% of New Zealand’s landmass and represent a large terrestrial carbon pool. In 2002 New Zealand implemented its first representative plot-based natural forest inventory to assess carbon stocks and stock changes in these mostly undisturbed old-growth forests. Although previous studies have provided estimates of biomass or carbon stocks, these were either not fully representative or lacked data from important pools such as dead wood (coarse woody debris). The current analysis provides the most complete estimates of carbon stocks and stock changes in natural forests in New Zealand. Results We present estimates of per hectare carbon stocks and stock changes in live and dead organic matter pools excluding soil carbon based on the first two measurement cycles of the New Zealand Natural Forest Inventory carried out from 2002 to 2014. These show that New Zealand’s natural forests are in balance and are neither a carbon source nor a carbon sink. The average total carbon stock was 227.0 ± 14.4 tC·ha− 1 (95% C.I.) and did not change significantly in the 7.7 years between measurements with the net annual change estimated to be 0.03 ± 0.18 tC·ha− 1·yr− 1. There was a wide variation in carbon stocks between forest groups. Regenerating forest had an averaged carbon stock of only 53.6 ± 9.4 tC·ha− 1 but had a significant sequestration rate of 0.63 ± 0.25 tC·ha− 1·yr− 1, while tall forest had an average carbon stock of 252.4 ± 15.5 tC·ha− 1, but its sequestration rate did not differ significantly from zero (− 0.06 ± 0.20 tC·ha− 1·yr− 1). The forest alliance with the largest average carbon stock in above and below ground live and dead organic matter pools was silver beech-red beech-kamahi forest carrying 360.5 ± 34.6 tC·ha− 1. Dead wood and litter comprised 27% of the total carbon stock. Conclusions New Zealand’s Natural Forest Inventory provides estimates of carbon stocks including estimates for difficult to measure pools such as dead wood and roots. It also provides estimates of uncertainties including effects of model prediction error and sampling variation between plots. Importantly it shows that on a national level New Zealand’s natural forests are in balance. Nevertheless, this is a nationally important carbon pool that requires continuous monitoring to identify potential negative or positive changes.

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