Phytoplankton
in Tram Chim National Park: A change in Habitat and Season
Thi Thanh-Nhan Luu, Bui Trung-Trinh Le, Thanh-Son Dao and Van-Ni Duong
Res. J. Biotech.; Vol. 20(5); 10-17;
doi: https://doi.org/10.25303/205rjbt10017; (2025)
Abstract
This study aims to build a database and to assess the current status of phytoplankton
biodiversity in Tram Chim National Park, contributing to information for resource
management. Phytoplankton samples were collected in the rainy season of 2018 (October)
and the dry season of 2019 (March), in 5 habitats namely core canal, buffer canal,
lotus pond, Eleocharis marshes and Melaleuca forest, 3 locations were collected
for each habitat. At each location, qualitative samples were collected by pulling
net method and a quantitative sample was collected by deposition method. These samples
were collected and handed according to the methods described by Sournia24, Hötzel
and Croome12. 60 phytoplankton samples were collected. The study identified 349
phytoplankton taxa belonging to 7 phyla, 11 classes, in which class Zygnematophyceae
had the highest number of taxa.
The number of taxa in the rainy season was higher than in the dry season with 305
taxa in the rainy season and 205 taxa in the dry season. The similarity of phytoplankton
composition among the sampling sites was low. Phytoplankton recorded were high in
core canals, buffer canals and Melaleuca forests. The density of phytoplankton in
the dry season was higher than that of in the rainy season. The diversity of the
phytoplankton was relatively high (except for core canal). Comparing to the study
on phytoplankton in Tram Chim National Park conducted in 1994, the number of taxa
in this study increased markedly, but the proportion of classes did not change.
Comparing to 2002, the number of taxa in this study did not changes but there was
a change in the proportion of classes.
