Abundance and Diversity of Phytoplankton as Determinants of Waters Quality of Lake Ngade Ternate, North Maluku, Indonesia | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 134, Volume 29, Issue 4, July and August 2025, Page 2483-2498 PDF (500.91 K) | ||||
| DOI: 10.21608/ejabf.2025.446024 | ||||
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| Author | ||||
| Yuliana et al. | ||||
| Abstract | ||||
| Lake Ngade holds significant potential as a source of fisheries resources and ecotourism in Ternate City. At present, the lake is utilized by the local community for various activities, including fish rearing using floating net cage systems, tourism, and fishing. This research aimed to analyze the abundance and diversity of phytoplankton in Lake Ngade, assess its water quality, and examine the relationship between phytoplankton abundance and the physicochemical parameters of the lake. The study was conducted from March to April 2023 at five sampling stations. Sampling was carried out four times at two-week intervals. Phytoplankton specimens were collected using the filtering method. The results revealed 64 genera of phytoplankton, representing five classes: Bacillariophyceae, Chlorophyceae, Cyanophyceae, Dinophyceae, and Euglenophyceae. Phytoplankton abundance ranged from 23,649 to 212,181 cells per liter. The ecological index values showed a diversity index (H') ranging from 0.9086 to 2.8132, an evenness index (E) ranging from 0.3542 to 0.8354, and a dominance index (D) ranging from 0.0900 to 0.5419. Based on the diversity index values, Lake Ngade is classified as mesotrophic, indicating moderate fertility. These conditions suggest that the lake is ecologically suitable for fish farming activities. | ||||
| Keywords | ||||
| Ecological indices; Lake Ngade; Phytoplankton | ||||
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