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All Journal Advances in Tropical Biodiversity and Environmental Sciences
Norma Aprilia Fanni
Lamongan Islamic University
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science Veterinary

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Analysis of Plankton Abundance and Status of Water Quality Fish Cultivation “Sawah Tambak” with Overtime System in Kalitengah Subdistrict, Lamongan Regency Agung Pamuji Rahayu; Moch Saad; Norma Aprilia Fanni
Advances in Tropical Biodiversity and Environmental Sciences Vol 5 No 1 (2021): ATBES
Publisher : Institute for Research and Community Services Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (570.81 KB) | DOI: 10.24843/ATBES.2021.v05.i01.p03

Abstract

The fish cultivation system in several villages in Kalitengah District uses an overtime system, namely a fish cultivation system that is carried out within 1 year (12 months) without passing rice planting. The research objective was to determine the abundance of plankton and the status of water quality fish cultivation “sawah tambak” with overtime system in Kalitengah District Lamongan. This is a quantitative research using descriptive methods. Based on the plankton abundance value at Station 1,2 and 3, the waters in the overtime system of ponds are in the Eutrooph category, with the abundance value > 12,000 Ind / L. Meanwhile station 4,5, and 6 are included in the Oligotrooph category since its abundance <10,000 Ind / L. The diversity value is within the range of 0.714267-1.823 which include in the category of small diversity and low community stability because the value of 0 <H '<1.5. All stations are in a moderate level of pollution which the diversity index value is within the range of 1 <H '<3. The Dominance Index (D) is in the range 0.212-1.224, Station 1 has a high dominance value because of the dominant species, namely Batrachospermum. Water quality parameters at all stations such asthe temperature ranges between 28.8-34.2 0C; the pH 8.5-9.2; Dissolved oxygen 4-10.44 mg / l; ammonia 0.009-0.17 mg / l; phosphate ranges from 0.025-2.3 mg / l. From the measurement results, water quality parameters show a good value for the growth of aquatic organisms.
Study Of Macrozoobentos Diversity In The Secondary Flow Of The Bengawan Solo River Agung Pamuji Rahayu; Norma Aprilia Fanni
Advances in Tropical Biodiversity and Environmental Sciences Vol 6 No 1 (2022): ATBES
Publisher : Institute for Research and Community Services Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (289.736 KB) | DOI: 10.24843/ATBES.2022.v06.i01.p05

Abstract

Macrozoobenthos are invertebrate animals that live on the bottom of the waters which are often used as an estimator of the imbalance in the physical, chemical, and biological environment of the waters. Polluted waters will affect the survival of macrozoobenthos organisms because they are easily affected by the presence of physical and chemical pollutants. This study aims to determine the diversity, abundance of macrozoobenthos as well as diversity index, evenness index, dominance index, and density index which can be used as a reference for determining the water quality of the Bengawan Solo River secondary flow in Tunjungmekar Village, Kalitengah District, Lamongan Regency. Researchers found 6 classes of gastropods, 1 class of bivalves, 1 class of crustaceans, 1 class of malacostraca, 1 class of clitella, from 10 types of macrozoobenthos. It is known that the diversity values ??of stations 1,2,3 and 4 are included in the low category, this is because the value of each station is <1. The evenness value of stations 1,2,3 and 4 is included in the low category because each station is <1. From the results of the dominance analysis, the highest value is at station 1 with a total of 0.59 because there are freshwater snail species that dominate at station 1. The highest value density is at station 1 with a value of (40.49) while the lowest value is at station 4 with a value of (2, 83). The highest density value is at station 1 with a value of (40.49) while the lowest value is at station 4 with a value of (2.83). The result water quality temperatures between 28.5-300C, brightness ranges from 19-21 cm, depth ranges from 0.5 - 2 m, the salinity of 0‰, pH from 8.5-8.8, dissolved oxygen (DO) ranged from 2.2 to 3.3 mg/L, nitrite ranged from 0.09-0.20 mg/l. The results of water quality measurements are still in good condition for the life of aquatic biota.
Co-Authors Agung Pamuji Rahayu Moch Saad