Parkia Biglobosa Jacq (dawa-dawa): The Threatened Giant of the Guinea Savanna of Nigeria (The Cross River State Situation).

Authors

  • Akwaji, Patrick Ishoro

  • Udo, S. E

  • Markson, A .A.

  • Umana, E. J

parkia biglobosa, threatened specie, logistic model, guinea savanna, cross river state

Abstract

Parkia biglobosa (Jacq) is a perennial tree of considerable multipurpose importance. In Nigeria, over 60 million people depend on it for food, fuel, wood work and income. This priority tree with enormous economic and social values to the local people of Cross River State (North) is rapidly declining due to rapid human population growth, livestock population pressures, increasing land fragmentation, over exploitation for seed (food) and a high demand for wood fuel especially charcoal. In view of this, a survey was carried out in the Guinea Savanna of Cross River State (North) to determine the level of abundance (A) or rarity (R) of the specie. In each site, ten 20m × 20m randomly selected points were laid along four 1km line transect and accordingly assessed. Seventeen economic important trees were assessed and counted as present with particular emphasis on P. biglobosa (taking into consideration the age of the plant). Results showed that the tree was rare (R) and facing extinction with low densities of 2.1/ha for (Ogoja L.G.A), 1.6/ha (Bekwarra), 2/ha (Obudu), 1.7/ha (Obanliku) and 1.5/ha for (Yala).

How to Cite

Parkia Biglobosa Jacq (dawa-dawa): The Threatened Giant of the Guinea Savanna of Nigeria (The Cross River State Situation). (2016). Global Journal of Science Frontier Research, 16(16), 21-32. https://journalofscience.org/index.php/GJSFR/article/view/

References

F. Adler (1997) Modeling the Dynamics of Life. Calculus and Probabilty for Life Scientists.

S. Alexei (1996) Lecture S: Exponential and Logistic Growth.

R. Arditi, L. Ginzburg (2012) How Species Interact: Altering the Standard View on Trophic Ecology.

N. Campbell, J. Reece (2008) Biology, Eighth edition.

Joel Cohen (1995) Population Growth and Earth's Human Carrying Capacity. 269(5222), 341-346. https://doi.org/10.1126/science.7618100

Mark Gardner, W. Ashby (1970) Connectance of Large Dynamic (Cybernetic) Systems: Critical Values for Stability. 228(5273), 784-784. https://doi.org/10.1038/228784a0

I. Hanksi (1991) Single-species metapopulation dynamics: concepts, models and observations. 42(1-2), 17-38. https://doi.org/10.1111/j.1095-8312.1991.tb00549.x

I. Hanksi (1997) Be diverse, be predictable. 390(6659), 440-441. https://doi.org/10.1038/37222

I. Hanksi (1998) Metapopulation dynamics. 396(6706), 41-49. https://doi.org/10.1038/23876

P. Hogeweg, B. Hesper (1978) Interactive instruction on population interactions. 8(4), 319-327. https://doi.org/10.1016/0010-4825(78)90032-x

A. Joshi, K. Joshi (2009) Plant Diversity and Ethnobotanical notes on tree species of Syabu village, Langtang National Park, Nepal. 13, 651-664.

S. Kingsland (1995) Modeling Nature: Epicodes in the History of Population Ecology. 127-146.

H. Knaust (2013) SOS math's. Mathmedics.

Richard Law, Jerry Blackford (1992) Self‐Assembling Food Webs: A Global Viewpoint of Coexistence of Species in Lotka‐Volterra Communities. 73(2), 567-578. https://doi.org/10.2307/1940763

Richard Levins, David Culver (1971) Regional Coexistence of Species and Competition between Rare Species. 68(6), 1246-1248. https://doi.org/10.1073/pnas.68.6.1246

Robert May (1972) Will a Large Complex System be Stable?. 238(5364), 413-414. https://doi.org/10.1038/238413a0

Robert May (2004) Uses and Abuses of Mathematics in Biology. 303(5659), 790-793. https://doi.org/10.1126/science.1094442

Edward McCauley, Roger Nisbet, William Murdoch, Andre De Roos, William Gurney (1999) Large-amplitude cycles of Daphnia and its algal prey in enriched environments. 402(6762), 653-656. https://doi.org/10.1038/45223

S. Mckelvey (1996) Setting Quotas- Modified Logistic Model. Envision it workshop.

Sean Nee, Robert May (1992) Dynamics of Metapopulations: Habitat Destruction and Competitive Coexistence. 61(1), 37. https://doi.org/10.2307/5506

Imanuel Noy-Meir (1975) Stability of Grazing Systems: An Application of Predator-Prey Graphs. 63(2), 459. https://doi.org/10.2307/2258730

J. Odebiyi, S. Bada, Ro Awodoyin, P. Oni, A. Omoloye (2004) Population structure of Vitelaria paradoxa Gaertn. F. and Parkia biglobosa(Jacq.) Benth.in the Agroforestry Parklands of Nigerian humid Savanna.

E. Renshaw (1991) Modeling Biological Populations in space and time. 6-9.

Michael Rosenzweig (1971) Paradox of Enrichment: Destabilization of Exploitation Ecosystems in Ecological Time. 171(3969), 385-387. https://doi.org/10.1126/science.171.3969.385

M. Sacande, C. Clethero (2007) Parkia biglobosa (Jacq) G. Don. 124.

A. Salim, A. Simons, A. Wavuhin, C. Orwa, C. Anyango (2002) ICRAF online. Agroforestree database: A tree species reference and selection guide. http://www.icraf.org/treessd/AFT/AFT.htm

M. Scheffer (2009) Critical Transitions in Nature and Society.

Marten Scheffer, Steve Carpenter, Jonathan Foley, Carl Folke, Brian Walker (2001) Catastrophic shifts in ecosystems. 413(6856), 591-596. https://doi.org/10.1038/35098000

P. Sharma (2009) Ecology and Environment 10th Edition. New Delhi. 562-565.

David Tilman, Clarence Lehman, Kendall Thomson (1997) Plant diversity and ecosystem productivity: Theoretical considerations. 94(5), 1857-1861. https://doi.org/10.1073/pnas.94.5.1857

David Tilman, Robert May, Clarence Lehman, Martin Nowak (1994) Habitat destruction and the extinction debt. 371(6492), 65-66. https://doi.org/10.1038/371065a0

J. Vandermeer (2010) How Populations Grow: The Exponential and Logistic Equations. 3(10), 15.

Vito Volterra (1926) Fluctuations in the Abundance of a Species considered Mathematically1. 118(2972), 558-560. https://doi.org/10.1038/118558a0

Peter Yodzis (1978) Competition for Space and the Structure of Ecological Communities. https://doi.org/10.1007/978-3-642-93097-3

Parkia Biglobosa Jacq (dawa-dawa): The Threatened Giant of the Guinea Savanna of Nigeria (The Cross River State Situation).

Published

2016-05-30

How to Cite

Parkia Biglobosa Jacq (dawa-dawa): The Threatened Giant of the Guinea Savanna of Nigeria (The Cross River State Situation). (2016). Global Journal of Science Frontier Research, 16(16), 21-32. https://journalofscience.org/index.php/GJSFR/article/view/