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Threat of agricultural production on woody plant diversity in Tankwidi riparian buffer in the Sudanian Savanna of Ghana

Boakye, Emmanuel Amoah and N'da Hyppolite, Dibi and Barnes, Victor Rex and Porembski, Stefan and Thiel, Michael and Kouamé, Francois N. and Kone, Daouda (2015) Threat of agricultural production on woody plant diversity in Tankwidi riparian buffer in the Sudanian Savanna of Ghana. International Journal of Biodiversity and Conservation, 7 (7), pp. 354-363. Academic Journals. DOI: 10.5897/IJBC2015.0853 ISSN 2141-243X

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Official URL: http://www.academicjournals.org/article/article1438358299_Boakye%20et%20al.pdf

Abstract

Riparian forest buffers (RF) are integrative part of the savanna agricultural landscape.However, they are under threat of deforestation from agricultural intensification. To ascertain the impact of the deforestation, this study used remote sensing techniques and field inventorying to assess riparian woody plant diversity on farmland (FA) andforest reserve (FR) along Tankwidi rivercourse in the Sudanian savanna of Ghana. Post-classification analysis of Landsat images revealed a reduction in forest cover from 1986 (23%) to 2014 (7%) in the river basin. Ground survey of sixty randomly selected plots (500m2per plot) equally divided between FA and FR along the river in a 50m buffer zone showed a reduction in the number of woody species (diameter ≥ 5cm) from FR (40) to FA (19). Anogeissus leiocarpus and Mitragyna inermis were the most abundant species in both FR and FA. Shannon-Wiener Index for species diversity reduced from FR (2.5±0.09) to FA (1.8±0.14). Within FR, there were more species (58%)in the lower diameter class (5to 15cm) than the higher diameter classes (15to 50cm) suggesting successful regeneration. The reverse was observed in FA where the individuals in the lower diameter class were fewer (26%) than the higher diameter classes. Reduction in species density from FR (355±21) to FA (146±11) will increase the surface exposure of the riparian area in farmland to heighten risks to climate disasters such as fires and flooding. Managing the risks will not be possible unless a conscious effort is made to educate farmers on the roles of RF, replanted to enhance diversityor riparian buffer excluded from farming for vegetation recovery.

Item URL in elib:https://elib.dlr.de/99054/
Document Type:Article
Title:Threat of agricultural production on woody plant diversity in Tankwidi riparian buffer in the Sudanian Savanna of Ghana
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Boakye, Emmanuel Amoaheaaboakye (at) yahoo.comUNSPECIFIED
N'da Hyppolite, DibiUNSPECIFIEDUNSPECIFIED
Barnes, Victor RexUNSPECIFIEDUNSPECIFIED
Porembski, StefanUniversität RostockUNSPECIFIED
Thiel, MichaelMichael.Thiel (at) uni-wuerzburg.deUNSPECIFIED
Kouamé, Francois N.UNSPECIFIEDUNSPECIFIED
Kone, DaoudaUNSPECIFIEDUNSPECIFIED
Date:July 2015
Journal or Publication Title:International Journal of Biodiversity and Conservation
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:7
DOI :10.5897/IJBC2015.0853
Page Range:pp. 354-363
Publisher:Academic Journals
ISSN:2141-243X
Status:Published
Keywords:Riparan buffer, biodiversity, Sudanian savanna, agricultural watershed
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Geowissenschaftl. Fernerkundungs- und GIS-Verfahren
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center
Deposited By: Wöhrl, Monika
Deposited On:10 Nov 2015 11:25
Last Modified:31 Jul 2019 19:55

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