No coin nor oath required. For personal study only.
key ccrorda: benthic invertebratea, sandy beaches, Gulf of Aqaba, Red See, community Six sandy beach stations along the Jordan Gulf of Aqaba were selected for macrofaunal examination during November 1980. Fifteen core samples (0.01 mz to a depth of 10-15 cm) were taken at each station; five a t the high tide line, five at the low tide line, and five midway.
Twenty-two tax& were encountered from all stations. Pofychaetea were the most diverse group with seven taxa, followed by molluscs and crustaceans with six and five taxa respectively. Animal diversity, using the Shannon-Wiener Index, waa generally low. Baaed on the biological index value.of MCCLOSHEY (1970), seven taxa were considered the community dominante. These are: the polychaetes. Qlycera taaelata, P&me renokr, Saccociww sp., and Perinereis nunfia; the isopod E u y d k arabica; a nernertean and an oligochaete.
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Variations in chlorophyll a concentration and in qualitative and quantitative counts of Nile phytoplankton were followed a t Assiut from September 1980 to September 1982. Chlorophyll a concentrations usually correlated well with phytoplankton density. The total phytoplankton exhibited higher counts