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Genetic diversity of Mansonia altissima A. Chev. under different regimes of human impact in the Akure Forest Reserve,Nigeria

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Forestry Studies in China 2010年第4期12卷 193-200页

作者： Akindele AKINNAGBE Oliver GAILING Reiner FINKELDEY Department of Forest Genetics and Forest Tree Breeding Georg August University

Mansonia altissima is an important West African timber tree species. For the purpose of examining the effect of human impact on its genetic diversity, genetic diversity and spatial genetic structure of the species under different regimes of human impact were investigated in the Akure Forest Reserve, Nigeria, using 504 amplified fragment length polymorphism （AFLP） markers. The results indicate a very low genetic diversity in M. altissima within the forest reserve （He = 0.045; PPL = 16.75%; Br = 1.162）. The highest genetic diversity was observed in the primary forest （H e= 0.062; PPL - 21.00%; Br = 1.204）, with the lowest genetic diversity in the isolated forest patch （He = 0.032; PPL = 9.00%; B r= 1.089）. A significant and pronounced spatial genetic structure was found in the logged forest and in the isolated forest patch. In contrast, the primary forest exhibited very weak spatial genetic structuring. As expected, no spatial genetic structure was found in the planted stands of M. altissima. From a conservation point of view, our results suggest that genetic diversity ofM. altissima is at risk in the forest reserve. The scale of human impact in the study area could pose a serious threat to the maintenance of genetic diversity of the species. These results would offer practical applications in the conservation of other tropical tree species.

关键词： AFLP Mansonia altissima human impact genetic diversity spatial genetic structure tropical rainforests

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VEGETATION OF THE LION-TAILED MACAQUE （MACACA SILENUS） HABITATS IN SOUTHERN INDIA: IMPLICATIONS FOR CONSERVATION

VEGETATION OF THE LION-TAILED MACAQUE （MACACA SILENUS） HAB...

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The Xixth Congress The International Primatological Society

作者： R.Krishnaman AjithKumar Division of Conservation Biology Salim Ali Centre for Ornithology and Natural History Anaikatti BPO Coimbatore 641 108 India. Division of Conservation Biology Salim Ali Centre for Ornithology and Natural History Anaikatti BPOCoimbatore 641 108 India.

＜正＞ In this study, we examine the diversity of food trees of the lion-tailed macaque （Macaca silenus）, a primate endemic to the tropical rainforests of the Western Ghats, southern India. This study was conducted between 8°30’ and 14°17’N （720 km） within an altitudinal range of 100-1500m, which formed the habitat of the lion-tailed macaque. The variation in the woody plant community was examined primarily with reference to their species richness, density, and basal area.

关键词： Lion-tailed macaque Macaco silenus Western Ghats southern India tropical rainforests rainforest vegetation food-trees tree species richness.

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