Diatom distribution and inter-site relationship in the Linggi River Basin, Peninsular Malaysia
1990
Nather Khan, I.S.A. (Malaya Univ., Kuala Lumpur (Malaysia). Asian Wetland Bureau)
Periphyton collected using glass microscope slides as an artificial substrate in the Linggi River showed a great diversity of life forms with an outer loose growth of filamentous algae and an inner layer of strongly attached sessile algae. Diatoms are numerically the most dominant algal group among the periphyton. The true periphyton, which include most diatoms, are usually sessile and attach themselves in the substratum by secreting mucilagenous substances. The occurence and abundance of diatoms varied from station to station. Species such as Achnanthes minutissima, A. saxonica, Cymbella javanica and Synedra rumpens were common in clean water stations whereas Nitzschia palea, Gomphonema parvulum, and Navicula cryptocephala were common in the organically enriched stations. Generally high Sorensen index values were obtained between the cleaner stations which also indicate that close affinities exist between the adjacent stations.
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