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All Journal Jurnal Biologi Tropis Jurnal Pijar MIPA
Munawaroh, Anggi Nurhardiyanti
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Immunology & microbiology Mathematics Physics

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Phytoplankton Diversity as a Bioindicator for Coastal Water Quality of Kecinan Beach North Lombok Regency Shofiana, Dwi Auliya; Candri, Dining Aidil; Japa, Lalu; Setyaningrum, Tri Wahyu; Munawaroh, Anggi Nurhardiyanti
Jurnal Pijar Mipa Vol. 20 No. 1 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i1.7507

Abstract

Kecinan Beach is one of the beaches on Lombok Island with many tourism activities. The activities in Kecinan Beach can influence the water quality, as the waters may receive waste from surrounding areas, leading to potential pollution or a decline in water quality. Phytoplankton are living organisms that can indicate whether a water body is polluted, which can be marked by changes in the community structure of phytoplankton, particularly in abundance and diversity. Water quality based on phytoplankton diversity as a bioindicator in Kecinan Beach has not been reported. This study was conducted to analyze the water quality of Kecinan Beach based on phytoplankton diversity as a bioindicator. Samplings were carried out in 9 sites in 3 stations during the month of March to June 2024. Samples were collected using a plankton net of 20µm mesh size. Samples were preserved in 4% formalin preservation and laboratory observation was conducted in the biology laboratory of FMIPA University of Mataram. The study identified 56 species from  3 classes, 21 families and 30 phytoplankton genera. The phytoplankton abundance in the coastal waters of Kecinan Beach was 126.667 ind/L. The species dominance index of phytoplankton of coastal waters of Kecinan Beach was 0.258, indicating no species dominance to each other. Rhabdonema arcuatum was identified as the highest (158%) species importance value. The species diversity index of phytoplankton of the coastal waters of Kecinan Beach was a moderate category. Based on the species diversity index, it can be said that the waters of Kecinan Beach are not polluted.
Mangrove Species Composition in The Mangrove Forest of Cendi Manik Village, Sekotong, West Lombok Regency Martha, Eriko Thopan; Candri, Dining Aidil; Ahyadi, Hilman; Ghazali, Mursal; Munawaroh, Anggi Nurhardiyanti
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i2.9189

Abstract

The mangrove forest in Cendi Manik Village, West Lombok Regency, consists of both natural and rehabilitated areas, the latter of which has been developed into the Bagek Kembar Mangrove Ecotourism site. While the growth of ecotourism has increased public and governmental attention toward the rehabilitated zone, concern for the natural mangrove forest has declined. This study aims to identify mangrove species composition and analyze vegetation density and diversity in the Cendi Manik mangrove area. The research was conducted from February to March 2024 using vegetation analysis methods across 15 plots distributed along three transects. The results identified six main mangrove species: Avicennia marina, A. alba, Rhizophora apiculata, R. mucronata, R. stylosa, and Sonneratia alba, with Rhizophora mucronata being the most dominant species, having the highest tree density of 440 individuals/ha. The total tree density reached 1,373.34 individuals/ha, which is categorized as dense according to Indonesian Ministry of Environment Regulation No. 201/2004. The species diversity index (H’) ranged from 1.54 to 1.61, indicating moderate to high diversity levels. The dominance of muddy substrates in the area supports the optimal growth of Rhizophora species. These findings highlight the ecological importance of conserving the remaining natural mangrove forests in Cendi Manik Village, given their vital role in coastal protection, carbon storage, and habitat provision for coastal biota. This research serves as a foundation for more comprehensive and sustainable conservation strategies in the region.
Co-Authors Dining Aidil Candri, Dining Aidil Hilman Ahyadi Lalu Japa, Lalu Martha, Eriko Thopan Shofiana, Dwi Auliya Tri Wahyu Setyaningrum, Tri Wahyu