Komunitas Algae Epilitik Sebagai Indikator Biologis Di Sungai Batang Ombilin, Sumatera Barat
Abstract: A study about
community of epilithic algae was conducted on April until August 2014. The
objective of this study was to clarify composition and structure of epilithic
algae in Ombilin River and
water quality of
Ombilin River based
on community of
epilithic algae. Samples were collected by survey and brushing method and the research station was
choosed 6 stations purposively. The results showed that totally 72 genera had
been found with total
density of epilithic
algae was 388.92ind/cm2to 2139.04
ind/cm2. The highest density
of epilithic algae
was found in
station III (Talawi)
and the lowest
in station II (Lubuk
Pinang). The dominant
epilithic algae were
Cocconeis, Synedra, Navicula,
Denticula and Gomphonema (Baccilariophyta), Stigeoclonium (Chlorophyta), Phormidium and
Calothrix (Cyanophyta), Ceratium
(Dinophyta) and Audouinella (Rhodophyta). Diversity
index was 1.50
to 2.48, where
the highest was
observed at station II (Lubuk
Pinang) and the lowest one at station III (Talawi). Equitability index was 0.42
to 0.68. Similarity index was 50 to 74.70%. Saphrobic coefficient was 0.61–1. The result
also showed that
Ombilin Riverwere polluted
slightly byorganic and inorganic materials in β-mesosaprobic
phase.
Penulis: Indah Yusliga Sari
Purba, Izmiarti dan Solfiyeni
Kode Jurnal: jpbiologidd150635
