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Registros recuperados: 5
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GIS-based integration of interdisciplinary ecological data to detect land-cover changes in creek Mangroves at Gazi Bay, Kenya OceanDocs
Koedam, N.; Dahdouh-Guebas, F.; De Wulf, R.; Tack, J.; Obade, P.T..
Historic environmental, faunal, floral and socioeconomic data of Gazi Bay in coastal Kenya were collated and integrated into a GIS environment and data of impacts due to various factors were then related to remotely sensed data. Rhizophora mucronata, a valuable mangrove species, was investigated. Very low values of basal area (7.7 m2/ha and 4.9 m2/ha) and complexity indices (1.86 and 1.12) at Makongeni and Kinondo 1, respectively, reflected intense human pressure in these areas. Areas that were easily accessible or close to human settlements appeared more vulnerable. Accrued information from a socioeconomic survey carried out over the same period corroborates the hypothesis that human influence was a major contributor to these changes. Historic aerial...
Tipo: Journal Contribution Palavras-chave: Ecology; Environmental monitoring; Mangroves; Fauna; Satellite imagery; Environmental impact; Http://aims.fao.org/aos/agrovoc/c_24420.
Ano: 2004 URL: http://hdl.handle.net/1834/1087
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Utilization of mangrove wood products around Mida Creek (Kenya) amongst subsistence and commercial users OceanDocs
Mathenge, C.; Dahdouh-Guebas, F.; Kairo, J.G.; Koedam, N..
Mida Creek (Kenya) comprises mangrove forests and other marine resources that are of economic, ecological and environmental importance to the local village communities. In total 116 households (100 of which could be used for numerical analysis), which are estimated to correspond to a coverage of ca. 30 % of the total Mida Creek population, were interviewed to assess the human reliance on mangrove resources in Mida Creek. The survey indicates that mangroves are a major resource of wood for house construction, fuelwood, charcoal and boat building. Minor uses of mangrove products include pharmaceutical and medicinal applications, tanning material and furniture making. Rhizophora mucronata, Ceriops tagal and Bruguiera gymnorrhiza are the major resources...
Tipo: Journal Contribution Palavras-chave: Mangrove; Survey analysis; Ethnobotany; Wood; Kenya; Mangroves; Wood; Http://aims.fao.org/aos/agrovoc/c_8421.
Ano: 2000 URL: http://hdl.handle.net/1834/803
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Regeneration Status of Mangrove Forests in Mida Creek, Kenya: A Compromised or Secured Future? OceanDocs
Dahdouh-Guebas, F.; Kairo, J.G.; Gwada, P..
The structure and regeneration patterns of Mida Creek mangrove vegetation were studied along belt transects at 2 forest sites of Mida Creek (3°20'S, 40°00'E): Uyombo and Kirepwe. Based on the species importance values, the dominant mangrove tree species in Mida were Ceriops tagal (Perr.) C. B. Robinson and Rhizophora mucronata Lamk. Tree density varied from 1197 trees ha–1 at Kirepwe to 1585 trees ha–1 at Uyombo and mean tree height was higher at the former site compared to the latter. The sizeclass structure at both localities of Mida showed the presence of more small trees than large ones. Spatial distribution pattern of adults and juveniles varied greatly between sites and they showed a close to uniform pattern (Morisita’s Index I0 << 1) for...
Tipo: Journal Contribution Palavras-chave: Mangroves; Forestry; Http://aims.fao.org/aos/agrovoc/c_3055.
Ano: 2002 URL: http://hdl.handle.net/1834/986
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Remote sensing and zonation of seagrasses and algae along the Kenyan coast OMA
Dahdouh-Guebas, F.; Coppejans, E.; Van Speybroeck, D..
Little information has been published on space-borne remote sensing of seagrasses, and no information is available about the distribution of seagrasses and algae in East Africa. Through satellite remote sensing this study investigates the distribution of these plants along a southern section of the Kenyan coast. The visible bands (red, green and blue) and the near infra-red band of a Landsat Thematic Mapper image acquired in 1992 were combined in order to detect seagrasses and algae in 10 sectors along the section of the coast. Ground trusting was done at three locations along the same section. Results indicate that two distinct zones of vegetation can be recognised, and ground trusting reveals their identity is rocky substrate with mostly algae and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coasts Distribution Ecological zonation Remote sensing Rocky shores Satellite sensing Sea grass Sea grasses Seaweeds Algae ISW; Kenyan Coast.
Ano: 1999 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7748
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Mangrove vegetation structure, dynamics and regeneration OMA
Dahdouh-Guebas, F..
The present PhD dissertation is composed of fourteen papers, preceded by a general introduction and followed by an epilogue that explains the entire research framework, including the links between the different case-studies, the local and global applicability of the results and the relevance of the work in the framework of development co-operation. The bulk of the research was carried out in four sites in Kenya and Sri Lanka: Gazi Bay and Mida Creek in Kenya, and Unawatuna-Galle and Pambala-Chilaw in Sri Lanka. After a revision of the often controversial issue of the floral composition of mangroves in Sri Lanka (SW coast), followed by a synthesis of image attributes in the interpretation of aerial photographs in Kenya and Sri Lanka, a series of...
Tipo: Info:eu-repo/semantics/doctoralThesis Palavras-chave: Mangroves Asia; Sri Lanka ISW; Kenya; Gazi Bay ISW; Kenya; Mida Creek.
Ano: 2001 URL: http://www.vliz.be/imisdocs/publications/226691.pdf
Registros recuperados: 5
Primeira ... 1 ... Última
 

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