Modeling Tree Diameter Distributions in Arboretum of Forestry and Wildlife University of Uyo: An Evaluation of 8 Statistical Models

Modeling Tree Diameter Distributions in Arboretum of Forestry and Wildlife University of Uyo: An Evaluation of 8 Statistical Models

Ekpa, N. E.

Contact

Ekpa

Contact

N. E.

Contact

Daniel

Contact

Ukpong

Contact

E.E

Contact

Etigale

Contact

Asuquo. O.E.

Contact

Modeling Tree Diameter Distributions in Arboretum of Forestry and Wildlife University of Uyo: An Evaluation of 8 Statistical Models

Article Fingerprint

ReserarchID

XGA4F

Modeling Tree Diameter Distributions in Arboretum of Forestry and Wildlife University of Uyo: An Evaluation of 8 Statistical Models Banner

AI TAKEAWAY

Connecting with the Eternal Ground

Abstract

The diameter distribution of the growing stock is an essential starting point in many forest management planning problems. Eight distribution functions was used to characterize the size classes of Tectona grandis stands in the arboretum of forestry and Wildlife, University of Uyo, Nigeria. The arboretum comprises of different compartment of trees. The data obtained were diameter at breast height (dbh) measurement of all trees in teak compartment. Using Easyfit modeling software, eight distribution functions was fitted to the data and estimates of the parameters were obtained. The results shows the diameter at breast height data with mean 16.83, standard error 1.08, skewness 1.96 while that of excess kurtosis is 4.84 .The performance of the function was evaluated using Kolmogorov-Simirnov test. Gneralized pareto distribution showed the best performance in terms of quality of fit to the diameter data with the lowest value of 0.0969, shape value of 0.93819.

References

22 Cites in Article

Reference Format

Robert Bailey,T Dell (1973). Quantifying Diameter Distributions with the Weibull Function.
K Bobo,Matthias Waltert,N Sainge,John Njokagbor,Heleen Fermon,Michael Mühlenberg (2006). From Forest to Farmland: Species Richness Patterns of Trees and Understorey Plants along a Gradient of Forest Conversion in Southwestern Cameroon.
J Boubli,J Eriksson,S Wich,G Hohmann,B Fruth (2004). Mesoscale transect sampling of trees inthe Lomako-yekokora interfluvium, Democratic Republic of the Congo.
H Burkhart,M Tome (2012). Modeling Forest Trees and Stands.
P Eder,A Sebastiao,F Afonso,Julio,E (2010). Using Weibull function for prognosis of yield by diameter class in Eucalyptus Urophylla Stand.
Mfon Effiong Asuquo,Anne Ekerete Ekanem,Edidiong Anthony Ekoriko,Wisdom Matthew Akpan (2010). Climate Change and Household Food Security in Ikot Ekpene Local Government Area, Akwa Ibom State, Nigeria.
N Ekpa,S Akindele,S Udofia (2014). Gmelina arborea Roxb. Graded stands with the Weibull distribution Function in Oluwa Forest Reserve, Nigeria.
Koko Daniel,Emem Inyang,Daniel Jacob,Nsisong Ekpa,Idorenyin Gideon (2014). Salient Underlying Mitigation Dimensions of Socioecological Risk to Sacred Grove as Nature-Based Indigenous Environmental Management Strategy..
K Gadow (1983). Fitting distributions in Pinus Patula stands.
H Ijeomah,Cic Okoli,E Iyah (2014). Ecotourism resources of University of Uyo, Nigeria: The arboretum and ravine destinations in perspective.
J Jackson (1994). Manual of Afforestation in Nepal.
S Jimoh,P O Adesoye,A Adeyemi,E Ikyaagba (2012). Forest structure analysis in the ObanDivision of Cross River National Park, Nigeria.
Yinyin Mon,Kay Oo,Kyaw Linn,Zin Lynn,Nyo Hlaing,Nay Ko (2001). Evaluation of Plant Growth Parameters by In vitro and Ex vitro Inoculation of Micropropagated Banana Plantlets with Rhizospheric and Endophytic Bacterial Inoculum.
Rafał Podlaski (2008). Characterization of diameter distribution data in near-natural forests using the Birnbaum–Saunders distribution.
V Quang (2004). Predicting parameters of a Weibull function for modelling diameter distribution.
K Rennolls,D Geary,Tj Rollinson (1985). Characterizing Diameter Distributions by the use of the Weibull Distribution.
B Robson,B Lima,Jose Franciso,Rinaldo (2016). Diameter distribution in a brazilian tropical dry forest domain: predictions for the stand and species.
Benjamin Rubin,Paul Manion,Don Faber-Langendoen (2006). Diameter distributions and structural sustainability in forests.
S Shamaki,S Akindele,A Isah,I Mohammed (2019). Height-diameter Relationship Models for Teak (Tectona grandis) Plantation in Nimbia Forest Reserve, Nigeria.
K White (1991). FAO REGIONAL CONFERENCE FOR ASIA AND THE PACIFIC.
Li-Feng Zheng,Xin-Nian Zhou (2010). Diameter distribution of trees in natural stands managed on polycyclic cutting system.
B Zira,A Ghide (2013). Illustrative Optimal Portfolio Selection for Agroforestry Crops: A Linear Programming Approach.

Download References

Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Ekpa, N. E.. 2020. \u201cModeling Tree Diameter Distributions in Arboretum of Forestry and Wildlife University of Uyo: An Evaluation of 8 Statistical Models\u201d. Global Journal of Science Frontier Research - H: Environment & Environmental geology GJSFR-H Volume 20 (GJSFR Volume 20 Issue H2).

More Citation Formats

Select Citation Style:

Download Citation

GJSFR Volume 20 Issue H2

Explore Journals Explore Volume Read This Issue

Journal Specifications

Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

Keywords

Not Found

Classification

GJSFR-H Classification FOR Code: 070599

Submission ReceivedMarch 22, 2020
Peer Review Double Blind
Handling Editor
Accepted April 20, 2020
Published May 5, 2020

Version of record

v1.2

Issue date

June 23, 2020

Language

Experiance in AR

Explore published articles in an immersive Augmented Reality environment. Our platform converts research papers into interactive 3D books, allowing readers to view and interact with content using AR and VR compatible devices.

View in VR

Read in 3D

Your published article is automatically converted into a realistic 3D book. Flip through pages and read research papers in a more engaging and interactive format.

View in 3D

Article Matrices

Total Views: 2401

Total Downloads: 1192

2026 Trends

Our website is actively being updated, and changes may occur frequently. Please clear your browser cache if needed. For feedback or error reporting, please email [email protected]