KELIMPAHAN DAN SEBARAN HORISONTAL FITOPLANKTON DI PERAIRAN MUARA SUNGAI KAKAP KABUPATEN KUBU RAYA
ABSTRACT: Phytoplankton plays
an important role in aquatic ecosystem as a primary producer. This study aims to
determine the genera, abundance and horizontal distribution of phytoplankton
and to measure the physical and chemical characteristics in the estuary of
Kakap River. The study was carried out between December 2013 and May 2014.
Phytoplankton samples were taken from five stasions that were determined based
on the differences in the environmental conditions by Adaptive Cluster Sampling
Method. The samples of phytoplankton were taken when the river water was in a
tidal conditions by plankton net. The composition of phytoplankton found in
estuary of Kakap River composed of 7 divisions, 7 classes and 42 genera. The
highest phytoplankton abundance found at high tides were 42,825 ind/L and
35,769 ind/L respectively. The highest abundance phytoplankton was found from
Bacillariophyceae (43,329 ind/L). Horizontal distribution of phytoplankton
showed that the further away from the area of river basin, more abundance and
more diverse of phytoplankton. Based on the value of Diversity Index (H’)
(3.006 - 3.3489), Dominance Index (D) (0.0473 – 0.0613) and Evennes Index (E)
(0.7118 – 0.8548), the estuary of Kakap River was in stable condition with high
diversity. Characteristics of physial and chemical factors in the river were
able to support the life of phytoplankton.
Penulis: Susi Andriani, Tri
Rima Setyawati, Irwan Lovadi
Kode Jurnal: jpbiologidd150089
