Efek Kromium Heksavalen terhadap Komunitas Alga Perifiton di Perairan Air Tawar = Effects of Hexavalent Chromium on Freshwater Periphytic Algal communities
| Main Author: | Puspitasari, Priscila Erma |
|---|---|
| Other Authors: | Sucahyo, Nugroho, Rully Adi |
| Format: | Thesis application/pdf |
| Bahasa: | ind |
| Terbitan: |
Program Studi Biologi FB-UKSW
, 2017
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| Subjects: | |
| Online Access: |
http://repository.uksw.edu/handle/123456789/9232 |
Daftar Isi:
- The entry of chromium in the waters can have an impact on aquatic organisms, including periphytic algae. Periphytic algae is a group of an alga which lives attachted on the substrate and has a role as a primary producers, oxygen producers, and as bio-indicators in aquatic ecosystems. The aims of this study is to determine the effect of chromium (VI) to freshwater periphytic algal communities, base on the amount of chlorophyll a, density, species richness, index of species diversity, evenness index, and index of dominance. Aquarium was filled with a liter of water from Rawa Pening lake and which was enriched by foliar fertilizer (0,6 mg/l). The solution of chromium (VI) with concentrations of 0, 0.05, 0.1, 0.2, 0.4, 0.8 mg/l was added into the aquariums and illuminated with 1,522 lux. Object glasses were used as artificial substrates placed in the bottom of the aquarium. The object glasses were taken on the 7th and 14th day after treatment. Measured parameters were the amount of chlorophyll-a, density, species richness, index of species diversity, evenness index, and index of dominance. The data obtained were analyzed using Two Way ANOVA with α 5% and followed by Tukey posterior test to determine the effect of chromium (VI) on the parameters measured. The results of this study indicated that there is an interaction effect of concentrationchromium (VI) and the length of time exposure to the amount of chlorophyll a, density, species richness, evenness index, and dominance index of periphytic algae, but this interaction does not affect on the value of index diversity periphytic algae. Toxicity of chromium (VI) and the length of time exposure affect to the decrease of chlorophyll number, density, and species richness.