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| Schleyer, M.; Obura, D.; Motta, H.; Rodrigues, M.J.. |
| The 1997-1998 El Niño southern oscillation caused elevated sea temperatures that resulted in global coral bleaching. Coral reefs constitute an important biological resource in terms of their complex biodiversity and are the basis for tropical fisheries and marine ecotourism. They represent one of Mozambique’s main coastal assets, and coastal communities and the growing tourism industry rely mainly on reef-based resources. Today, about 6.6 million people live within Mozambique’s 48 coastal administrative districts. This represents 42% of the current population (15.7 million), which is expected to grow at 3% p.a. (INE, 1998). In 1994, the population density in coastal districts was 28 persons/km2. In 1996, much higher densities were recorded in the coastal... |
| Tipo: Report |
Palavras-chave: Coral reefs; El Nino phenomena. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/489 |
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| Schleyer, M.; Obura, D.; Rodrigues, M.J.. |
| The 1997-1998 El Nino southern oscillation (ENSO) caused elevated sea temperatures that resulted in global coral bleaching. Coral reefs constitute an important biological resource in terms of their complex biodiversity and are the basis for tropical reef fisheries and marine ecotourism. They represent one of Mozambique's main coastal assets and its coastal communities and growing tourism industry rely mainly on reef-based resources. Mozambican artisanal fisheries are largely centred on reefs and are responsible for about 70% of the total catch, highlighting their importance. Most tourism similarly occurs along the coast where the best infrastructure is established, especially near the coral reefs of Pemba, Mozambique Island, the Bazaruto Archipelago,... |
| Tipo: Report |
Palavras-chave: Coral reefs; El Nino phenomena; Tourism. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/888 |
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| Mdodo, R.; Uku, J.N.; Obura, D.; Wawiye, P.; Mwachireya, S.. |
| Coral reefs along the entire coast of Kenya suffered widespread bleaching and mortality of corals during the first half of 1998 (Wilkinson, 1998; Obura, 1999; McClanahan et al., 1999). This status report summarises findings relating specifically to coral bleaching, mortality and effects on benthic community structure. In addition, preliminary results from a number of research projects investigating different aspects of the bleaching event are reported here. In shallow waters, on a per-area basis, most of Kenya’s southern fringing reefs have lost between 66% and 80% of their live corals. Coral reefs in deeper water suffered less mortality due to lesser exposure to higher temperatures. Reefs on the northern part of the coast, influenced by cold water... |
| Tipo: Other |
Palavras-chave: Coral reefs. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/433 |
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| Mwachireya, S.; Uku, J.N.; Mdodo, R.; Obura, D.; Wawiye, P.. |
| Coral reefs along the entire coast of Kenya suffered widespread bleaching and mortality of corals during the first half of 1998 (Wilkinson, 1998; Obura, 1999; McClanahan et al., 1999). This status report summarises findings relating specifically to coral bleaching, mortality and effects on benthic community structure. In addition, preliminary results from a number of research projects investigating different aspects of the bleaching event are reported here. In shallow waters, on a per-area basis, most of Kenya’s southern fringing reefs have lost between 66% and 80% of their live corals. Coral reefs in deeper water suffered less mortality due to lesser exposure to higher temperatures. Reefs on the northern part of the coast, influenced by cold water... |
| Tipo: Report |
Palavras-chave: Coral reefs; Ecology. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/774 |
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| Kimani, P.; Obura, D.. |
| A participatory mapping study was conducted in Kinondo location of Kwale district in Kenya. The area is subject to high human population and development pressure in the north, where tourism and urban development is intense, compared to lower population pressure in the south where such development is low. Our focus was to document information about these resources that have maintained fishing for many generations and to address issues of their conservation and management. The study focused on the spatial arrangement, access, ownership and use of land-based resources, mainly shrubs, grasses and trees, at four landing sites along the north-south population gradient. Participatory techniques (sketch maps, livelihood diagrams and transect walks) were applied,... |
| Tipo: Journal Contribution |
Palavras-chave: Artisanal fishing; Resource availability; Coral reefs. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1122 |
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| Obura, D.. |
| Annual peaks in sea temperature occur in the first half of each year, as the sun moves northwards after heating the sea-surface during the southern summer. Long term records in the central Indian Ocean indicate a distinct warming trend (Chagos, Maldives) of almost 1o C over the last 30 to 50 years, leading up to the highest recorded maximum during the El Niño Southern Oscillation in early 1998. |
| Tipo: Preprint |
Palavras-chave: Sea surface temperature. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/477 |
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| Obura, D.. |
| Eastern African coral reefs were severely impacted by the El Niño Southern Oscillation of 1997-98, with bleaching and mortality levels varying from <1% in South Africa to 80% and greater on reefs in northern Tanzania and Kenya. Recovery of affected reefs to 2002 has been poor to moderate, and patchy. Reefs strongly impacted by the El Niño that had high coral diversity and cover have recovered to less than one quarter of pre-bleaching coral cover. However, some high diversity reefs that escaped the bleaching impacts have remained healthy, with high coral cover and diversity. Degraded reefs outside Marine Protected Areas (MPAs) that were severely damaged by the El Niño have generally recovered to 50-100% of pre-bleaching coral cover. Recruitment of corals... |
| Tipo: Book Section |
Palavras-chave: Coral reefs; El Nino phenomena. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/338 |
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| Obura, D.; Visram, S.. |
| Coral reefs globally are increasingly under threat from environmental and anthropogenic factors, particularly the recent widespread bleaching and mortality of corals due to the temperature anomaly recorded during the 1997/98 El Niño. The active rehabilitation of reefs maybe necessary in some locations. Different rehabilitation methods require development for use in different conditions according to the constraints of area, availability of funding and reasons for rehabilitation. A number of studies have involved transplantation of parts of adult corals at a variety of technical, financial and spatial scales. Methods have included placement of loose staghorn Acropora branches (Bowden-Kirby, 1997; Lindahl, 1998) on suitable substrates, cementing corals to... |
| Tipo: Report |
Palavras-chave: Coral reefs. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/485 |
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