scholarly journals Relationship between Carbon Stock and Plant Biodiversity in Collaborative Forests in Terai, Nepal

ISRN Botany ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Ram Asheshwar Mandal ◽  
Ishwar Chandra Dutta ◽  
Pramod Kumar Jha ◽  
Siddhibir Karmacharya
Keyword(s):  
Biodiversity Conservation ◽  
Carbon Stock ◽  
Forest Degradation ◽  
Plant Biodiversity ◽  
Managed Forest ◽  
Breast Height ◽  
Plot Size ◽  
Prime Concern ◽  
Study Sites ◽  
The Relationship

Reducing emission from deforestation and forest degradation (REDD+) programme has prime concern to carbon stock enhancement rather than biodiversity conservation. Participatory managed forest has been preparing to get benefit under this programme, and collaborative forest is one of them in Nepal. Hence, this research is intended to assess the relationship between carbon stock and biodiversity. Three collaborative forests (CFMs) were selected as study sites in Mahottari district, Nepal. Altogether 96 sample plots were established applying stratified random sampling. The plot size for tree was 20 m × 25 m. Similarly, other concentric plots were established. Diameter at breast height (DBH) and height were measured, species were counted, and soil samples were collected from 0–0.1, 0.1–0.3, and 0.3–0.6 m depths. The biomass was calculated using equation of Chave et al. and converted into carbon, soil carbon was analyzed in laboratory, and plant biodiversity was calculated. Then, relation between carbon stock and biodiversity was developed. Estimated carbon stocks were 197.10, 222.58, and 274.66 ton ha−1 in Banke-Maraha, Tuteshwarnath, and Gadhanta-Bardibas CFMs, respectively. The values of Shannon-Wiener Biodiversity Index ranged 2.21–2.33. Any significant relationship between carbon stock and biodiversity, and was not found hence REDD+ programme should emphasize on biodiversity conservation.

scholarly journals Effect of Uncertainties in Estimated Carbon Reduction from Deforestation and Forest Degradation on Required Incentive Payments in Developing Countries

2017 ◽  
Vol 9 (9) ◽  
pp. 1608 ◽  
Author(s):  
Jichuan Sheng
Keyword(s):  
Developing Countries ◽  
Emission Reduction ◽  
Carbon Stock ◽  
Forest Degradation ◽  
Incentive Scheme ◽  
Low Carbon ◽  
Emission Reductions ◽  
Carbon Reduction ◽  
The Relationship ◽  
Incentive Payments

For reducing emissions from deforestation and forest degradation (REDD+) programs, it is particularly important that monitoring for emission reductions is tied to the revenues a developing country receives from REDD+ projects; any estimated uncertainties will have significant impacts on the emission reduction estimation and incentive scheme of REDD+. However, the effects of estimated uncertainties on incentives for developing countries have not been deeply discussed in the current literature. To fill this gap, two estimation approaches for emission reductions are introduced by considering the incentive coefficient by the principle of reliable minimum estimation. The relationship between estimated uncertainties and incentive coefficient is simulated to illustrate the effects of estimated uncertainties on the emission reduction estimation and incentive scheme. Data from six tropical developing countries are used, including Nigeria, Honduras, Indonesia, Cambodia, Ghana, and Brazil. The results indicate that both the errors of referential and actual carbon stock must be considered when estimating and predicting emission reductions. The effects of the error of actual carbon stock on the emission reduction estimation and incentive coefficient were determined to be more influential. The current incentive scheme was more favorable to developing countries with high carbon stock variability, while developing countries with low carbon stock variability had insufficient incentives to implement REDD+ project.

Ethanol in ponderosa pine as an indicator of physiological injury from fire and its relationship to secondary beetles

2003 ◽  
Vol 33 (5) ◽  
pp. 870-884 ◽  
Author(s):  
Rick G Kelsey ◽  
Gladwin Joseph
Keyword(s):  
Pinus Ponderosa ◽  
Ponderosa Pine ◽  
Xylem Sap ◽  
Upward Movement ◽  
Stem Base ◽  
Breast Height ◽  
Dead Trees ◽  
Crown Scorch ◽  
Second Year ◽  
The Relationship

Sixteen days after a September wildfire, ethanol and water were measured in phloem and sapwood at breast height and the base of Pinus ponderosa Dougl. ex P. & C. Laws. with zero (control), moderate, heavy, and severe crown scorch. The quantity of ethanol increased with each level of injury, resulting in trees with severe scorch containing 15 and 53 times more phloem and sapwood ethanol, respectively, than controls. Ethanol concentrations in the sapwood and adjacent phloem were related, probably as a result of diffusion. Upward movement in xylem sap was most likely responsible for the relationship between sapwood ethanol concentrations at breast height and the stem base. As trees recovered from their heat injuries, the ethanol concentrations declined. In contrast, ethanol accumulated in dead trees that lost their entire crowns in the fire. Various bark and xylophagous beetles landed in greater numbers on fire-damaged trees than on controls the following spring and summer, suggesting that ethanol was being released to the atmosphere and influencing beetle behavior. Beetle landing was more strongly related to sapwood ethanol concentrations the previous September than in May. Sapwood ethanol measured 16 days after the fire was the best predictor of second-year mortality for trees with heavy and severe crown scorch.

scholarly journals Contribution of some Acacia Species on Carbon Sequestration in Blue Nile State, Sudan

2021 ◽  
pp. 97-105
Keyword(s):  
Carbon Sequestration ◽  
Wood Density ◽  
Carbon Stock ◽  
Tree Height ◽  
Biomass Estimation ◽  
Expansion Factor ◽  
Wood Volume ◽  
Crown Diameter ◽  
Breast Height ◽  
Acacia Seyal

Background: The current challenge is to reduce the uncertainties in obtaining accurate and reliable data of carbon stock changes and emission factors essential for reporting national inventories. Improvements in above ground biomass estimation can also help account for changes in carbon stock in forest areas that may potentially participate in the Reducing emissions from deforestation and forest degradation and other initiatives. Current objectives for such estimates need a unified approach which can be measurable, reportable, and verifiable. This might result to a geographically referenced biomass density database for Sudanese forests that would reduce uncertainties in estimating forest aboveground biomass. The main objective: of this study is to assess potential of some selected forest variables for modeling carbon sequestration for Acacia seyal, vr. Seyal, Acacia seyal, vr. fistula, Acacia Senegal. The specific objectives include development of empirical allometric models for forest biomass estimation, estimation of carbon sequestration for these tree species, estimation of carbon sequestration per hectare and comparing the amount with that reported to the region. A total of 10 sample trees for biomass and carbon determination were selected for each of the three species from El Nour Natural Forest Reserve of the Blue Nile State, Sudan. Data of diameter at breast height, total tree height, tree crown diameter, crown height, and upper stem diameters were measured. Then sample trees were felled and sectioned to their components, and weighed. Subsamples were selected from each component for oven drying at 105 ˚C. Finally allometric models were developed and the aboveground dry weight (dwt) and carbon sequestered per hector were calculated. The results: presents biomass equations, biomass expansion factor and wood density that developed for the trees. In case of inventoried wood volume, corrections for biomass expansion factor and wood density value were done, and new values are suggested for use to convert wood volume to biomass estimates. The results also, indicate that diameter at breast height, crown diameter and tree height are good predictors for estimation of tree dwt and carbon stock. Conclusion: The developed allometric equations in this study gave better estimation of dwt than default value. The average carbon stock was found to be 22.57 t/ha.

scholarly journals THE EFFECT OF GRASSLAND MANAGEMENT ON DIVERSITY OF SPIDER ASSEMBLAGES IN THE MÁTRA MOUNTAIN

2016 ◽  
Vol 7 ◽  
pp. 291-297
Author(s):  
Tünde Szmatona-Túri ◽  
Diána Vona-Túri
Keyword(s):  
Nature Conservation ◽  
Conservation Management ◽  
Similarity Index ◽  
Grassland Management ◽  
Hay Meadows ◽  
Mountain Grasslands ◽  
Spider Communities ◽  
Study Sites ◽  
And Control ◽  
The Relationship

Our investigation targeted the diversity of spider communities of meadows under nature conservation management and the relationship between mowing and the spider diversity. The study sites represented by six grasslands on three localities of Mátra mountain of Hungary. All three localities were contained a hay meadow and a not mowed meadow. Hay meadows had the richest spider communities.  In the control habitats, the equitability and the Shannon-Wiener diversity were lower than in the mowed grasslands. According to the Bray-Curtis similarity index significant differences were observed between spider assemblages of mowed and control habitats. The prevention of succession effects so rich structure of the vegetation where diverse spider communities can live. Our results suggest that mowing is a suitable management for maintaining a high biodiversity in mountain grasslands.

scholarly journals Factors Affecting the Awareness of Biodiversity Conservation Among Students in Malaysia Private University

2018 ◽  
Vol 7 (4.35) ◽  
pp. 791
Author(s):  
Nurul Jannah Jalil ◽  
Zainon Mat Sharif
Keyword(s):  
Biodiversity Conservation ◽  
Biological Diversity ◽  
Behavioral Control ◽  
Biodiversity Loss ◽  
Private University ◽  
Perceived Behavioral Control ◽  
Factors Affecting ◽  
Knowledge And Attitude ◽  
Human And Nature ◽  
The Relationship

Recently, biodiversity loss has become direr international. Human behavior is one of the causes that harm the biodiversity richness. Malaysia which is known as the megadiversity country also facing with the similar problem. Conservation of the biodiversity must be taken seriously and importantly by people to maintain the relationship between human and nature because we are affecting each other. Thus, this research was aiming to evaluate the relationship between human attitude, experience and knowledge toward the awareness of biodiversity conservation. The research was conducted using 4 variables from Ajzen’s Theory of Planned Behavior (TPB) which are behavior, perceived behavioral control, subjective norms and attitude. This study was carried out in Malaysia by conducting a survey of 30 students from a private university. The findings of this study indicate that the mentioned have given the positive effect to the awareness of biological diversity conservation. In addition, the relation of knowledge and attitude also show the great correlation between themselves. Therefore, knowledge, experience and attitude are the factors that could increase peoples' awareness towards the biodiversity conservation and knowledge is the greatest influence in creating peoples' awareness.

scholarly journals The Relationship between User Perception and Preference of Greenway Trail Characteristics in Urban Areas

2019 ◽  
Vol 11 (16) ◽  
pp. 4438 ◽  
Author(s):  
Junga Lee ◽  
Hyung-Sook Lee ◽  
Daeyoung Jeong ◽  
C. Scott Shafer ◽  
Jinhyung Chon
Keyword(s):  
Multiple Regression ◽  
Urban Areas ◽  
Regression Analyses ◽  
User Perception ◽  
Virtual Tour ◽  
Significant Difference ◽  
Vegetation Water ◽  
Study Sites ◽  
The Relationship ◽  
Water Amount

Greenways provide multiple benefits for trail users’ individual experiences based on users’ background environment and their perceptions of characteristics such as the trail width, vegetation, water, and facilities. Although greenway trail characteristics are important factors that affect users’ preferences, only a few studies have examined individuals’ experiences of greenways based on their perceptions and preferences. The purpose of this study is to examine how greenway trails can be designed to improve users’ experiences in relation to their perceptions and preferences by considering trail characteristics. We examine the relationship between greenway trail characteristics and likability using t-tests as well as correlation and multiple regression analyses. In the current study, virtual tour surveys of greenway users were conducted, with two urban greenway trails as the study sites: Town Lake Trail in Austin, Texas, and Buffalo Bayou Trail in Houston, Texas. Perceptions of all eight greenway trail characteristics, except for background buildings, were significantly different between the trails, and a significant difference in likability was found for five characteristics (the presence of water, trail facilities, trail width, adjacent automobile traffic, and built structures on the trail). In addition, the results of the correlation and multiple regression analyses revealed that the presence of water, amount of vegetation, automobile traffic, and built structures were correlated with likability. These findings suggest that designing appropriate types of greenway trails can help increase users’ likeability ratings of urban greenways. This study contributes to the enhancement of trail environments by providing strategies for practitioners to effectively design and manage greenways.

scholarly journals Response of pollen diversity to the climate-driven altitudinal shift of vegetation in the Colombian Andes

2006 ◽  
Vol 362 (1478) ◽  
pp. 253-262 ◽  
Author(s):  
Chengyu Weng ◽  
Henry Hooghiemstra ◽  
Joost F Duivenvoorden
Keyword(s):  
Plant Diversity ◽  
Climatic Conditions ◽  
Fossil Pollen ◽  
Tropical Andes ◽  
Lower Altitude ◽  
The Past ◽  
Colombian Andes ◽  
Altitudinal Shift ◽  
Study Sites ◽  
The Relationship

Change in diversity of fossil pollen through time is used as a surrogate for biodiversity history. However, there have been few studies to explore the sensitivity of the measured pollen diversity to vegetation changes and the relationship between pollen diversity and plant diversity. This paper presents results of a study to assess the relationship between pollen diversity and relative abundance of pollen from different altitudinal vegetation belts (subandean forest, Andean forest, subparamo and grassparamo) in three records from the tropical Andes in Colombia. The results indicated that plant diversity in the vegetation declined with altitude and pollen diversity is positively correlated to the abundance of pollen from lower altitude vegetation belts and negatively correlated to that from the grassparamo. These results, therefore, suggest that pollen diversity coarsely reflects the diversity of the surrounding vegetation. Using this interpretation, we were able to predict changes in plant diversity over the past 430 000 years in the Colombian Andes. Results indicated that under warmer climatic conditions, more species-diverse vegetation of low elevation moved upslope to contribute more pollen diversity to the study sites, and under colder conditions, species-poor grassparamo moved downslope and observed pollen diversity was lower. This study concludes that fossil pollen diversity may provide an important proxy to reconstruct the temporal changes in plant diversity.

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