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carbon stock measurements of a degraded tropical logged-over secondary forest in Manokwari Regency,West Papua,Indonesia

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Forestry Studies in China 2012年第1期14卷 8-19页

作者： Hendri Takao YAMASHITA Arno Adi KUNTORO Han SOO LEE Department of Development Technology Graduate School for International Development and CooperationHiroshima University1-5-1 KagamiyamaHigashi-Hiroshima 739-8529Japan Faculty of Forestry State University of PapuaManokwari 98314Indonesia Faculty of Civil and Environmental Engineering Institute of Technology BandungBandung 40132Indonesia

Several studies have been conducted in the past on carbon stock measurements in the tropical forests of Indonesia. This study is the first related research conducted in the New Guinea Island. In a degraded logged-over secondary forest in Manokwari Regency （West Papua, Indonesia）, carbon stocks were measured for seven parts, i.e., above-ground biomass （AGB）, below-ground biomass （BGB）, under-storey biomass （B）, necromass of dead leaves （N~）, necromass of dead trees （Art）, litter （L） and soil （S） using appropriate equations and laboratory analysis. Total carbon stocks were measured at 642.8 tC.h~~ in the low disturbance area, 536.9 tC＇ha-~ in the moderate disturbance area and 490.4 tC＇ha ~ in the high disturbance area. Bu, N1 and N were not significant in the carbon stock and were collectively categorized as a total biomass complex. The carbon stock of litter was nearly equal to that of the total biomass complex, while the total carbon stock in the soil was eight times larger than the total biomass complex or the carbon stock of the litter. We confirmed that the average ratio of AGB and BGB to the total biomass （TB） was about 84.7% and 15.3%, respectively. Improvements were made to the equations in the low disturbance logged-over secondary forest area, applying corrections to the amounts ofbiomass of sample trees, based on representative commercial trees of category one. TB stocks before and after correction were estimated to be 84.4 and 106.7 ***-~, indicating that these corrections added significant amounts of tree biomass （26.4%） dur- ing the sampling procedure. In conclusion, the equations for tree biomass developed in this study, will be useful for evaluating total carbon stocks, especially TB stocks in logged-over secondary forests throughout the Papua region.

关键词： West Papua equation carbon stock biomass necromass litter soil

Soil organic carbon stock and fractional distribution across central-south China

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International Soil and Water Conservation Research 2021年第4期9卷 620-630页

作者： Rubing Zeng Yujie Wei Jianjia Huang Xin Chen Chongfa Cai Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River)of the Ministry of Agriculture College of Resources and EnvironmentHuazhong Agricultural UniversityWuhan430070China

The stock and stability of soil organic carbon(SOC)are critical to soil functions and global carbon cycle,but little quantitative information is available on the precise location and chemical components of SOC for soils across a wide range of climatic ***,a broad range of zonal soils were collected in forest land at topsoil(0-15 cm)and subsoil(15-30 cm)from temperate to tropical climatic gradient in central to south *** stock and stability of SOC were determined in terms of aggregate and humic *** in bulk soils with a less significant geographic variation was comparably higher at Haplic Luvisoils in temperate regions(3637.61 g m^(−2))and Rhodi-Humic Ferrosols in tropical regions(3446.12 g m^(−2))than in the other experimental soils,but a consistent decreasing trend was observed along the soil profiles with the SOC stock was 1.11-1.97 times higher in the topsoil than in the *** addition,insoluble humin residue(HMr)as the dominant components of SOC ranged from 643.95 to 2696.90 g m^(−2) and decreased from temperate to tropical regions,which was consistent with the zonal variation of humic acids(HAs),but contrary to the zonal variation of fulvic acids(FAs)that fluctuated in a range of 39.67-389.55 g m^(−2) across the experimental *** to the results of partial correlation analysis,the variation of FAs stock was significantly attributed to soil pH,bulk density,iron and aluminum oxides,clay,and clay mineral content(|r|>0.61,pcarbon stock was mainly stored in macroaggregates(36.34-76.09%)for both SOC and its chemical components,especially in topsoils,and its zonal variation was associated with that of bulk *** general,the redundancy analysis(RDA)revealed that mean annual precipitation(MAP)accounted for 81.8%and 13.8%of the variance in SOC chemical a

关键词： carbon stock Humic substance Soil aggregation

Total carbon stock and Potential carbon Sequestration Economic Value of Mukogodo Forest-Landscape Ecosystem in Drylands of Northern Kenya

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Open Journal of Forestry 2022年第1期12卷 19-40页

作者： Nereoh C. Leley David K. Langat Abdalla K. Kisiwa Geoffry M. Maina Meshack O. Muga Kenya Forestry Research Institute Nairobi Kenya Department of Natural Resources Egerton University Njoro Kenya Food and Agriculture Organization of the United Nations Nairobi Kenya

carbon sequestration is one of the important ecosystem services provided by forested landscapes. Dry forests have high potential for carbon storage. However, their potential to store and sequester carbon is poorly understood in Kenya. Moreover, past attempts to estimate carbon stock have ignored drylands ecosystem heterogeneity. This study assessed the potential of Mukogodo dryland forest-landscape in offsetting carbon dioxide through carbon sequestration and storage. Four carbon pools (above and below ground biomass, soil, dead wood and litter) were analyzed. A total of 51 (400 m2) sample plots were established using stratified-random sampling technique to estimate biomass across six vegetation classes in three landscape types (forest reserve, ranches and conservancies) using nested-plot design. Above ground biomass was determined using generalized multispecies model with diameter at breast height, height and wood density as variables. Below ground, soil, litter and dead wood biomass;carbon stocks and carbon dioxide equivalents (CO2eq) were estimated using secondary information. The CO2eq was multiplied by current prices of carbon trade to compute carbon sequestration value. Mean ± SE of biomass and carbon was determined across vegetation and landscape types and mean differences tested by one-way Analysis of Variance. Mean biomass and carbon was about 79.15 ± 40.22 TB ha

Stand Diversity and carbon stock of a Tropical Forest in the Deng Deng National Park, Cameroon

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Open Journal of Ecology 2023年第7期13卷 461-496页

作者： Seraphine E. Mokake Babila K. Weyi Neculina Anyinkeng Lyonga M. Ngoh Obenarreyneke E. Berkeley Egbe E. Andrew Department of Plant Biology Faculty of Science University of Douala Douala Cameroon Department of Plant Science Faculty of Science University of Buea Buea Cameroon Tropical Plant Exploratory Group Mundemba Cameroon Faculty of Agriculture and Veterinary Medicine University of Buea Buea Cameroon

Tropical rainforests are crucial in maintaining about 70% of the world’s plant and animal biodiversity and are also the highest terrestrial carbon reservoir. This study aimed to determine the tree species composition, structure and carbon stocks of the Deng Deng National Park which is a semi-deciduous tropical forest (plots 1 and 2 and the transition zone to the savannah (plot 3). Plots demarcation and enumeration followed standard protocols for permanent monitoring plots. The inventory of tree species ≥ 2 cm revealed a total of 5523 individuals of 64 species in 53 genera belonging to 26 families with plot 2 having the highest (2135 individuals/ha) and plot 3 the least (1291 individuals/ha). Tabernaemontana crassa was the most important tree species in the tropical forest and Lecythis idatimon in the savannah. Basal area was highest in the tropical forest and least in the savannah. The diameter distribution of trees in all forest types displayed a reverse J-pattern. Aboveground biomass was highest in the tropical forest (530.2 ± 66.4 t·C/ha) and least in the savannah (184.3 ± 20.1 t·C/ha). The carbon stock of the above ground biomass was twice as much as that of the below ground biomass, soil organic matter and litter. The total carbon stock estimated in all pools was 278.75 t·C/ha. The study site was poor in plant diversity, biomass and carbon stock, indicating a disturbed site with the absence of large trees and undergoing natural regeneration. This underlines an urgent need for efficient restoration management practices.

关键词： Diversity Above Ground Biomass Below Ground Biomass carbon stock Deng Deng National Park

Aboveground biomass and carbon stock in the largest sacred grove of Manipur,Northeast India

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Journal of Forestry Research 2018年第2期29卷 420-423页

作者： Aahen Chanu Waikhom Arun Jyoti Nath P.S.Yadava Department of Ecology and Environmental Science Assam University Department of Life Sciences Manipur University

Aboveground biomass and carbon stock in the largest sacred grove of Manipur was estimated for trees with diameter [10 cm at 1.37 m *** aboveground biomass,carbon stock,tree density and basal area of the sacred grove ranged from 962.94 to 1130.79 Mg ha;,481.47 to 565.40 Mg ha;C,1240 to 1320 stem ha;and79.43 to 90.64 m;ha;,*** in diameter class of 30–40 cm contributed the highest proportion of aboveground biomass（22.50–33.73%）.The aboveground biomass and carbon stock in research area were higher than reported for many tropical and temperate forests,suggesting a role of spiritual forest conservation for carbon sink management.

关键词： Allometric models carbon stock Sacred forest Basal area Tree density

Pursuing the goal of carbon neutrality in China:path for realization of carbon sequestration in planted forests

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Frontiers of Agricultural Science and Engineering 2024年第3期11卷 355-366页

作者： Lei DENG Haitao HU Jiwei LI Xue LI Chunbo HUANG Zhijing YU Hailong ZHANG Qing QU Xiaozhen WANG Lingbo DONG Zhouping SHANGGUAN State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation) Northwest A&F University Shaanxi Forestry Survey and Planning Institute College of Landscape Architecture Northeast Forestry University Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources Key Laboratory of Regional Ecology and Environmental Change School of Geography and Information EngineeringChina University of Geosciences

Tree plantations are an important forest resource that substantively contributes to climate change mitigation and carbon sequestration. As the area and standing volume of tree plantations in China have increased, issues such as unreasonable structure, low productivity, limited ecological functionality and diminishing ecological stability have occurred, which hinder the ability of tree plantations to enhance carbon sequestration. This study outlined the trajectory of carbon sequestration and its associated benefits in tree plantations by examining the current state of tree plantation establishment and growth, elucidated the strategies for advantages of carbon sequestration and climate change mitigation in planted forests, and summarized the existing problems with tree plantations. This paper underscores the pressing need for concerted efforts to boost carbon sequestration within planted forests and proposes management and development strategies for Chinese tree plantations. In the future, it will be necessary to apply scientific theories to practice and develop multi-objective management optimization models for the high-quality development of tree plantations. This will involve establishing a cohesive national carbon trading market, improving the prediction of carbon sequestration, and identifying priority zones for afforestation and reforestation, to better serve China's national strategy for achieving peak carbon and carbon neutrality.

关键词： Planted forest carbon stock carbon sequestration carbon management climate change promotion path

Parkland trees on smallholder farms ameliorate soil physical-chemical properties in the semi-arid area of Tigray,Ethiopia

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Journal of Arid Land 2024年第1期16卷 1-13页

作者： Selam LJALEM Emiru BIRHANE Kassa TEKA Daniel H BERHE Department of Land Resources Management and Environmental Protection College of Dryland Agriculture and Natural ResourcesMekelle UniversityMekelle 231Ethiopia Institute of Climate and Society Mekelle UniversityMekelle 231Ethiopia Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life Sciences(NMBU)Ås 1432Norway Department of Natural Resources Management Adigrat UniversityAdigrat 50Ethiopia

Proposed agroforestry options should begin with the species that farmers are most familiar with,which would be the native multipurpose trees that have evolved under smallholder farms and socioeconomic *** African birch(Anogeissus leiocarpa(DC.)Guill.&Perr.)and pink jacaranda(Stereospermum kunthianum Cham.)trees are the dominant species in the agroforestry parkland system in the drylands of Tigray,*** farmers highly value these trees for their multifunctional uses including timber,firewood,charcoal,medicine,*** trees also could improve soil ***,the amount of soil physical and chemical properties enhanced by the two species must be determined to maintain the sustainable conservation of the species in the parklands and to scale up to similar agroecological ***,we selected twelve isolated trees,six from each species that had similar dendrometric characteristics and were growing in similar environmental *** divided the canopy cover of each tree into three radial distances:mid-canopy,canopy edge,and canopy gap(control).At each distance,we took soil samples from three different *** collected 216 soil samples(half disturbed and the other half undisturbed)from each canopy position and soil *** density(BD),soil moisture content(SMC),soil organic carbon(SOC),total nitrogen(TN),available phosphorus(AP),available potassium(AK),p H,electrical conductivity(EC),and cation exchange capacity(CEC)were *** revealed that soil physical and chemical properties significantly improved except for soil texture and EC under both species,CEC under ***,and soil p H under ***,all the studied soils were improved under both species canopy as compared with canopy ***,TN,AP,and AK under canopy of these trees were respectively 24.1%,11.1%,55.0%,and 9.3% higher than those soils under *** two parkland agroforestry species significantly enhanced soil fertility near the canopy of top

关键词： agroforestry bulk density carbon stock dispersed tree soil texture tree canopy

Patterns and drivers of tree carbon stocks in Kashmir Himalayan forests:implications for climate change mitigation

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Ecological Processes 2022年第1期11卷 812-824页

作者： Ashaq Ahmad Dar Narayanaswamy Parthasarathy Department of Ecology and Environmental Sciences School of Life SciencesPondicherry UniversityPuducherry 605014India

Background:Temperate forests are major carbon sinks because of their high storage potential and low decomposi-tion *** quantified tree carbon(TC)storage from 143 plots distributed across three major forest types of Kashmir Himalaya,relative to differences in ecological *** regression and Random Forest(RF)analysis were used to examine the distribution of TC stock along ecological gradients and recognize the role of driving factors on TC ***:Among the three forest types,sub-alpine(SA)forest was the primary TC sink,accounting for 228.73 t ha^(−1)of carbon,followed by mixed conifer(MC;181.29 t C ha^(−1))and blue pine(BP;133.04 t C ha^(−1))*** distribution of TC stocks among the three forest types differed significantly(χ^(2)=18.87;P=0.000).Relative carbon stock analysis demonstrated that Abies pindrow and Pinus wallichiana accounted 91%of TC stocks across the *** area,mean diameter at breast height(DBH),elevation,disturbance and precipitation had significant effects on TC stocks in bivariate regression *** RF model explained 86%of the variation;basal area interpreted 30.15%,followed by mean DBH(17.96%),disturbance complex(10.64%),precipitation(8.00%)and elevation(7.34%).Conclusions:Kashmir Himalayan forests are significant carbon sinks as they store a substantial quantum of carbon in *** carbon,an essential climatic indicator,is determined by a complex interaction of other ecological vari-ables,particularly stand structural *** study provides insights into the role of these natural forests in climate change mitigation and in REDD+/national commitments to offset the carbon.

关键词： carbon stock Climate change Coniferous forest Disturbance Kashmir Himalaya Stand structure

A systematic review on the aboveground biomass and carbon stocks of Indian forest ecosystems

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Ecological Processes 2018年第1期7卷 165-176页

作者： Onkar Salunkhe P.K.Khare Richa Kumari M.L.Khan Laboratory of Ecology Department of BotanyDr.Hari Singh Gour UniversitySagarMadhya Pradesh 470003India

Background:Tropical forests play a crucial role as source and sink in global carbon *** and other anthropogenic activities have led to degradation of forest land,and ultimately,it results in loss of biodiversity and increases concentration of CO_(2) in ***,there is urgent need to estimate regional and national level carbon stock for making forest-based policies and strategies for mitigation of CO_(2).Patchy and sporadic information is available on biomass and carbon stock of Indian *** paper presents a systematic review and comprehensive account of studies conducted in different forest types in ***:There are six major forest types found in India consisting of 15 groups and other subgroups with peculiar *** used by researchers for biomass/carbon stock estimation are destructive,nondestructive,tree inventories data,species-specific biomass estimation,and remote *** of estimates are based on nondestructive allometric equation *** showed positive correlation between tree species,diameter at breast height,and biomass/carbon ***-and medium-sized growing trees,invasive species,mixed forest,Agroforestry,and Agrosilviculture also play an important role in atmospheric carbon *** results of diverse forest carbon stock studies are broadly categorized in North,Central,and Southern *** review will be helpful for developing conservation policies and decision to increase carbon stock and also REDD+program for particular forest ***:The systematic literature review was carried out to gather and summarize information from different studies conducted on forest ecosystems and quantification methods used for biomass estimation and carbon stock in different forests types and states of *** general,great variability occurs in aboveground biomass and carbon stock on account of climatic and geographic *** obtain good and accurate

关键词： Tropical forests Aboveground biomass carbon stock