Impact of cocoa farming on vegetation in an agricultural landscape in Ghana
Identifieur interne : 001C00 ( Main/Exploration ); précédent : 001B99; suivant : 001C01Impact of cocoa farming on vegetation in an agricultural landscape in Ghana
Auteurs : Alex Asase [Ghana] ; Kwasi Ofori-Frimpong [Ghana] ; Patrick K. Ekpe [Ghana]Source :
- African Journal of Ecology [ 0141-6707 ] ; 2010-06.
Descripteurs français
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- geographic : Ghana.
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Abstract
Cocoa production occurs almost wholly within areas identified as biodiversity hotspots in West Africa and it has been noted as a major contributor to deforestation at the forest‐agriculture interface. This study investigated the impact of cocoa farming on vegetation in relation to three land‐use types of increasing cocoa production intensity from remnant native forest through shaded to unshaded cocoa farmlands in Ghana. The study used transects and forty‐two 25 m × 25 m vegetation plots. The overall noncocoa plant species richness decreased significantly (95% CI) from the remnant native forest through shaded to the unshaded cocoa farmlands. Significant differences (P ≤ 0.05) were also found in the mean density and basal area of noncocoa plants per hectare with the remnant native forest recording the highest values and the unshaded cocoa farmlands the lowest. The relative density of about 44.7% out of the 41 most abundant plant species declined in cocoa farmlands. The results of this study showed that cocoa farming could result in a drastic forest plant species loss with subsequent recruitment of nonforest species, forest plant species population decline as well as changes in the structural characteristics of the vegetation. This impact increases with increasing cocoa production intensity.
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DOI: 10.1111/j.1365-2028.2009.01112.x
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Ekpe</name><affiliation wicri:level="1"><country xml:lang="fr">Ghana</country><wicri:regionArea>Department of Botany, University of Ghana, PO Box LG 55 Legon</wicri:regionArea><wicri:noRegion>PO Box LG 55 Legon</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">African Journal of Ecology</title><idno type="ISSN">0141-6707</idno><idno type="eISSN">1365-2028</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2010-06">2010-06</date><biblScope unit="volume">48</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="338">338</biblScope><biblScope unit="page" to="346">346</biblScope></imprint><idno type="ISSN">0141-6707</idno></series><idno type="istex">0F41798C463271F947FD4FF5AEFB7D86713EA2DB</idno><idno type="DOI">10.1111/j.1365-2028.2009.01112.x</idno><idno type="ArticleID">AJE1112</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0141-6707</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ghana</term><term>biodiversity</term><term>cocoa</term><term>management</term><term>vegetation</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Ghana</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Cocoa production occurs almost wholly within areas identified as biodiversity hotspots in West Africa and it has been noted as a major contributor to deforestation at the forest‐agriculture interface. This study investigated the impact of cocoa farming on vegetation in relation to three land‐use types of increasing cocoa production intensity from remnant native forest through shaded to unshaded cocoa farmlands in Ghana. The study used transects and forty‐two 25 m × 25 m vegetation plots. The overall noncocoa plant species richness decreased significantly (95% CI) from the remnant native forest through shaded to the unshaded cocoa farmlands. Significant differences (P ≤ 0.05) were also found in the mean density and basal area of noncocoa plants per hectare with the remnant native forest recording the highest values and the unshaded cocoa farmlands the lowest. The relative density of about 44.7% out of the 41 most abundant plant species declined in cocoa farmlands. The results of this study showed that cocoa farming could result in a drastic forest plant species loss with subsequent recruitment of nonforest species, forest plant species population decline as well as changes in the structural characteristics of the vegetation. This impact increases with increasing cocoa production intensity.</div></front></TEI><affiliations><list><country><li>Ghana</li></country></list><tree><country name="Ghana"><noRegion><name sortKey="Asase, Alex" sort="Asase, Alex" uniqKey="Asase A" first="Alex" last="Asase">Alex Asase</name></noRegion><name sortKey="Asase, Alex" sort="Asase, Alex" uniqKey="Asase A" first="Alex" last="Asase">Alex Asase</name><name sortKey="Ekpe, Patrick K" sort="Ekpe, Patrick K" uniqKey="Ekpe P" first="Patrick K." last="Ekpe">Patrick K. Ekpe</name><name sortKey="Ofori Rimpong, Kwasi" sort="Ofori Rimpong, Kwasi" uniqKey="Ofori Rimpong K" first="Kwasi" last="Ofori-Frimpong">Kwasi Ofori-Frimpong</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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