New Zealand Journal of Marine and Freshwater Research abstracts
Colonisation and growth of epiphytic algal communities on Potamogeton
perfoliatus under two different light regimes
Munira Sultana
Takashi Asaeda†
Jagath Manatunge
Abdurahman Ablimit
Department of Environmental Science and Human Engineering
Saitama University
255 Shimo-okubo
Saitama-shi, Saitama
Japan 338-8570
email: asaeda@post.saitama-u.ac.jp
†Author for correspondence.
Abstract The composition and distribution of epiphytic
algae on Potamogeton perfoliatus were studied in a controlled laboratory
environment over 84 days under two light conditions. The study was based on
a 2 x 2 factorial design with two light conditions (high and low, 200 and
80 μE m-2 s-1) and two different plant parts (apical
and basal). In both light conditions, the community consisted of 18 taxa (under
nine genera) of Bacillariophyceae. Amphora lineolata, Cocconeis
placentula, and Diatoma hiemale were the most common and abundant
species. The total algal density was significantly higher in the high light
condition and on the basal plant part than in the low light condition and
on the apical plant part. At termination of the experiment, basal plant parts
exhibited a more uniform crust of epiphytic algae consisting of c. 95% C.
placentula whereas the apical plant parts expressed a more mosaic community
(under both light conditions).
Keywords algal density; community; species richness;
abundance
M03060; Received 22 September 2003; accepted 16 February 2004; Online publication
date 5 August 2004
New Zealand Journal of Marine and Freshwater Research, 2004, Vol. 38:
585-594 0028-8330/04/3804-0585 © The Royal Society of New Zealand
2004
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