Biodiversity of algae potentially HABS (Harmfull Algae Blooms) in reservoir Mrica, Banjarnegara

Andriyani, Nuraina; Mahdiana, Arif; Dewi, Rose; Subagyo, Yusuf; Siregar, Asrul Sahri; Junaidi, Teuku; Harisam, Taufan

doi:10.1051/e3sconf/20184703001

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…The high NH 3 -N concentration in the dry season in the Cirata Reservoir was related to dense floating cages. The deposition of uneaten pellets disturbed aerobic and anaerobic bacteria activity, thus the incompletely degraded pellets produced NH 3 -N, which is dangerous for aquatic organisms [39]. A large number of floating cages in the Cirata Reservoir also caused oxygen depletion in the water [8], and it potentially caused fish deaths.…”

Section: Water Quality Dynamics In the Dry Seasonmentioning

confidence: 99%

“…The pho-tosynthesis processes of aquatic autotrophs are the main source of increasing oxygen levels in the water [43]. In addition, the accumulation of incompletely degraded pellets increases NH 3 -N in the water [39]. Generally, NH 3 -N is alkaline [44] and, therefore, increases the pH in the Cirata Reservoir.…”

Section: Water Quality Dynamics In the Dry Seasonmentioning

confidence: 99%

“…The floating cage aquaculture and water current increased phosphate and nitrate levels in the sediment. The uneaten pellet deposits increase the sedimentation of organic material containing nitrogen and PO 4 onto the reservoir floor [7,39,41]. The water current can push sediment resuspension to quickly redeposit it around the reservoir floor [33], and the uneaten pellet deposits also spread to almost the entire reservoir bottom.…”

Section: Water Quality Dynamics In the Dry Seasonmentioning

confidence: 99%

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Characteristics and Changes in Water Quality Based on Climate and Hydrology Effects in the Cirata Reservoir

Wiranegara,

Sunardi,

Sumiarsa

et al. 2023

Water

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This research aimed to identify water quality changes in the Cirata Reservoir and the factors affecting them in terms of hydrology and climate. The sampling was carried out in both the rainy and dry seasons at 12 locations in the Cirata Reservoir. The Mann–Whitney U-test (different test) results showed that salinity, total suspended solids (TSS), the potential of hydrogen (pH), nitrate (NO3-N), phosphate (PO4), nitrate and phosphate content in the sediment were significantly different (α < 0.05) between the rainy and dry seasons. The principal component analysis (PCA) results showed that the water quality characteristics in the Cirata Reservoir in the dry season were influenced by environmental conditions in the reservoir, especially by the floating cage aquaculture and climate conditions. The high solar radiation, low rainfall, and floating cage aquaculture increased the pH and amounts of dissolved oxygen (DO), ammonia (NH3-N), PO4, nitrate and phosphate in the sediment while decreasing transparency, salinity, TSS, and NH3-N. During the rainy season, the high runoff from Citarum Watershed controlled the water quality characteristics of the Cirata Reservoir. In this season, transparency, salinity, pH, DO, NH3-N, PO4, nitrate and phosphate in the sediment increased, while TSS tended to be low. In general, the water volume addition decreased the nutrition and salinity concentration in the water body. However, a distinct phenomenon occurred in the Cirata Reservoir. The runoff from agriculture, settlement, livestock, and the Citatah Karst in the Upper Citarum Watershed increased nutrition and salinity in the reservoir. Land use in the Citarum Watershed and floating cage aquaculture had an important role in the reservoir water quality.

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Section: Water Quality Dynamics In the Dry Seasonmentioning

confidence: 99%

Section: Water Quality Dynamics In the Dry Seasonmentioning

confidence: 99%