<p>
The Decapodal, Copepoda, Cladocera and Ostracoda taxonomy are
the popular species of crustaceans in freshwater in general, and in the
water bodies of karst in particular. The biodiversity of these groups is
reflected in the abundance of the species, number of individuals and
distribution in the community. They play a major role in the food chain
and food net of aquatic ecosystem. Many species are economically
exploitable.
In the world, many studies on the fauna in general and the freshwater
crustaceans in the water bodies of karst in particular, including cave
underground water were realised with interestingly results which many
new genus and species have been found.
In Vietnam, for the topographical karst in general and the limestone
mountains of Phong Nha-Ke Bang National Park in Quang Binh Province
in particular, especially for underground water bodies in the cave
underground water bodie there are very few research on biodiversity
characteristics, species composition of the aquatic fauna in general and the
crustacean group in particular.
Previous studies on the environment and aquatic life in the Phong
Nha-Ke Bang National Park have recorded 33 freshwater crustacean
species, of which 12 species are found in the Phong Nha cave. Of the
species found in the river in the Phong Nha cave, two new Calanoida
crustacean species for science are described. These new species and genus
are currently being considered endemic to Vietnam.
Certainly, these above results have not fully reflected the species
composition and distribution characteristics of freshwater crustaceans in
the topographical karst, espcially the cave underground water in the karst
of Phong Nha-Ke Bang. Therefore, we propose the research topic: "Study
on species composition and distribution characteristics of freshwater
custacean in water bodies of Phong Nha-Ke Bang National Park".
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