Fisheries in the Southern Border Zone of Takamanda - Impact ...

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96 Languy and Motombe f 5 q—2˜— w22@IE2—A y2@w—˜A H S IH u 5 5 Figure 1. Bird sampling sites in Takamanda Forest Reserve, Camerooon In addition to general observations, we used mist nets at eight sites (Figure 1 and Table 2) to maximize the chances of recording shy forest species. The bird survey lasted for a total of 36 field days (excluding transport) and was undertaken during three time intervals: 8-29 January 2001, 10-18 March 2001, and 10-22 December 2001. An experienced bird observer (Njie) was in the field during all three intervals and was responsible for data collection. Assistants from nearby villages acted as guides and also helped in erecting the mist nets. Takamanda: the Biodiversity of an African Rainforest 5 w— w— 5 5 5 5 w—— 5 5 5 5 5 3 Results 3.1 Species richness A total of 309 species of birds were recorded during the surveys, not including four species recorded by World Wildlife Fund in 1988 through the use of mist nets. Including those species brings the total to 313 species known to occur in Takamanda—an impressive number when compared to protected areas such as Campo National Park, Dja Faunal Reserve, or Lobeke National Park, which have been more extensively surveyed. We estimate that further surveys at different times of the year and in different sectors (particularly at the highest altitudes) of the Reserve should increase the total number of species.
Assessment of the Bird Fauna Table 1. Location of observations in Takamanda Forest Reserve, Cameroon. Site Name Coordinates Kekpani 06Ê05’841”N: 09Ê23’929”E Mbu 06Ê00’786”N: 09Ê27’389”E Assam 06Ê00’501”N: 09Ê27’559”E Mfakwe 06Ê03’695”N: 09Ê25’520”E Takamanda 06Ê01’146”N: 09Ê16’267”E Takwo 06Ê08’157”N: 09Ê.36.253”E Obonyi I 06Ê07’938”N: 09Ê15’465”E Obonyi III 06Ê07’784”N: 09Ê17’233”E Matene 06Ê16’150”N: 09Ê21’404”E Mende 06Ê19’385”N: 09Ê22’779”E Mbilishi 06Ê11’693”N: 09Ê27’401”E Basho I 06Ê08’366”N: 09Ê27’091”E Akwa 06Ê03’442”N: 09Ê28’500”E Nyang 05Ê57’115”N: 09Ê25’364”E This high diversity is almost certainly the result of the variety of ecosystems found in the Reserve: lowland Guineo-Congolian forest (including forested rivers), montane forests, and high-altitude grasslands. Of special significance is the transition forest between montane and lowland forests, a forest type that suffers from encroachment in Cameroon and Africa in general, but that holds a large variety of birds. Table 2. Location of mist nets in Takamanda Forest Reserve, Cameroon. Site Name Coordinates Obonyi I forest 06Ê07’488”N; 09Ê12’888”E near Magbe River Mende Hills 06Ê19’400”N; 09Ê23’474”E Kekpani forest 06Ê05’841”N; 09Ê23’929”E Takamanda forest 06Ê03’160”N; 09Ê16’794”E Mblishi forest 06Ê11’693”N: 09Ê27’401”E Obonyi III forest 06°07’784”N; 09°17’233”E Mbu 06Ê00’786”N: 09Ê27’389”E Nyang 05Ê57’115”N: 09Ê25’364”E 3.2 Threatened species As shown in Table 3, nine threatened species have been recorded so far in Takamanda. Of these, one—the Whitethroated Mountain Babbler Kupeornis gilberti—is considered “endangered.” Two—Grey-necked Picathartes Picathartes oreas and Bannerman’s Weaver Ploceus bannermani—are “vulnerable,” while six others—Hartlaub’s Duck Pteronetta hartlaubii, Yellowcasqued Wattled Hornbill Ceratogymna elata, Cameroon Montane Greenbul Andropadus montanus, Crossley’s Ground-thrush Zoothera crossleyi, Bangwa Forest Warbler Bradypterus bangwaensis, and White-tailed Warbler Poliolais lopezi—are “near threatened” (BirdLife International 2000). The occurrence of these species confirms the global significance of Takamanda Forest Reserve for imperiled bird species. 3.3 Restricted-range/endemic species A key outcome of the survey was the discovery of 16 species with restricted ranges (Table 4). Restricted-range species have a total world range of less than 50,000 km² and thus are very limited in their distribution. The species are grouped by Endemic Bird Areas (EBA), areas which encompass the overlapping breeding ranges of restrcitedrange bird species, such that the complete ranges of at least two restricted-range species are entirely included within the boundary of the EBA (Stattersfield et al. 1998). Thirteen of the 16 restricted-range species found in Takamanda are confined to the Cameroon-Nigeria mountain chain, and three are restricted to the Cameroon- Gabon lowlands. Such a vast array of restricted-range species shows the importance of Takamanda Forest Reserve as a sanctuary for species that are endemic to the Cameroon mountains. SI/MAB Series #8, 2003 97
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Smithsonian Institution SI/MAB Biod
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ii 10. Fisheries in the Southern Bo
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Mercy Abwe Dione Dept. of Biology,
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18 Takamanda: the Biodiversity of a
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24 Sunderland et al. Table 2. Summa
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26 Sunderland et al. lowland forest
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28 Sunderland et al. impressive cat
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30 Sunderland et al. Herbaceous flo
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34 Sunderland et al. 5.5 Economic P
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36 Sunderland et al. Table 5. Summa
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38 Sunderland et al. monitoring pro
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40 Sunderland et al. Letouzey, R. 1
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44 Sunderland et al. Agelaea pentag
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Page 66 and 67: 56 O’Kah f22 y2@w—˜A g—22@IE
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No. of individuals (n = 315) 200 15
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No. of individuals (n = 1065) 1000
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Gnetum spp. Piper guineensis Site T
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Resource Impacts of seasonality Ava
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174 Slayback 7 H S IH type of autom
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