Komunitas Biota Hewan Bentik Pada Danau Paparan Banjir Di Kalimantan Timur
Abstrak: Lake Semayang and
Melintang are floodplain lakes of River Mahakam, which are economically
important as inland fisheries resources in Kutai Kartanegara Regency, East
Kalimantan. Benthic community in both
lakes are still in rare exposed. Therefore, the aim of this research is to
evaluate their community characteristics based on structure, diversity, and
distribution pattern. The research was conducted in July 2006 at ten sampling
stations of both lakes. Water quality in both lakes in terms of temperature was between 28 and
32oC, while pH, turbidity and conductivity were low, namely 3.74 – 5.39, 0.2 – 7.6 NTU, and 0.011 – 0.034 mS/cm,
respectively. Dissolved oxygen was between 0.96 mg/L and 6.35 mg/L, and total
organic matters (TOM) was high (26.8 – 57.5 mg/L). Benthic community organism was arranged by
mollusks, oligochaete and dipterans, consisting of 15 species with the
abundance of 8 – 433 ind/m2. Aulodrilus piquet was the dominant species of
oligochaete and Melanoides tuberculata was the dominant species from mollusks.
The significant high number of A. piqueti was probably due to its preference on
the habitat with the abundance of aquatic plants. Shannon Index Diversity of
benthic organism community was low (<1.50), and it seemed to be related to the
extreme condition of floodplain area environment. The distribution of benthic
organisms did not show homogenous pattern which was also related to floodplain
area condition.
Kata Kunci: Lake Semayang, Lake Melintang, floodplain, benthic organism,
diversity index, distribution pattern
Penulis: Lukman, T Chrismadha, Muhammad Fakhrudin, J
Sudarso
Kode Jurnal: jpbiologidd090077
