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1. 

   Soil nutrient ecology associated with Acacia sieberana at different tree densities in a South African savanna

   Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C. Roos --- Department of Terrestrial Ecology and Nature Conservation, The Netherlands N. Allsopp --- ARC Range and Forage Institute, c/o Botany Department, Republic of South Africa

   Three aspects of soil nutrient ecology in an Acacia sieberana savanna were studied. First, information was collected about the effects of the savanna tree species Acacia sieberana on soil fertility, in terms of isolated tree effects and in terms of...

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2. 

   Allozyme and mtDNA variation of white seabream Diplodus sargus populations in a transition area between western and eastern Mediterranean basins (Siculo-Tunisian Strait)

   Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Kaouèche --- Unité de Recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques, Tunis L Bahri-Sfar --- Unité de Recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques, Tunis M González-Wangüemert --- Departamento de Ecología e Hidrología, Facultad de Biología, Spain Á Pérez-Ruzafa --- Departamento de Ecología e Hidrología, Facultad de Biología, Spain OK Ben Hassine --- Unité de Recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques, Tunis

   To investigate the possible influence of the Siculo-Tunisian Strait on the genetic structure of white seabream Diplodus sargus, 13 polymorphic allozyme loci and a fragment of the cytochrome b mito-chondrial DNA were analysed. Allozyme data indicated a moderate but significant...

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