Assessment of Microalgal Diversity, Community Composition, and Environmental Drivers in Coral Reef and Mangrove Habitats of Sekotong Coastal, Lombok Island

Sri Puji Astuti; Moch. Affandi; Agoes Soegianto

doi:10.2991/978-94-6463-942-1_9

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Assessment of Microalgal Diversity, Community Composition, and Environmental Drivers in Coral Reef and Mangrove Habitats of Sekotong Coastal, Lombok Island

Authors

Sri Puji Astuti¹^{, 2}, Moch. Affandi³, Agoes Soegianto³^{, 4}^{, *}

¹Doctoral Program of Mathematics and Natural Sciences, Faculty of Science and Technology, Universitas Airlangga, Surabaya, Indonesia

²Department of Biology, Faculty of Mathematics and Natural Sciences, University of Mataram, Mataram, Indonesia

³Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya, Indonesia

⁴Research Group of Environmental Technology and Innovation, Faculty of Science and Technology, Universitas Airlangga, Surabaya, Indonesia

^*Corresponding author. Email: agoes_soegianto@fst.unair.ac.id

Corresponding Author

Agoes Soegianto

Available Online 29 December 2025.

DOI: 10.2991/978-94-6463-942-1_9 How to use a DOI?
Keywords: Bioindicators; Community composition; Environmental gradients; Microalgae; Lombok
Abstract: Coastal ecosystems such as mangroves and coral reefs support marine biodiversity and stability, with microalgae as primary producers and environmental sentinels. We present the first comparative assessment of microalgal diversity and environmental drivers across adjacent mangrove and reef habitats in Sekotong coastal waters, Lombok Island, Indonesia. Monthly sampling over four campaigns used 20 µm plankton nets at fixed, georeferenced stations, while in situ measurements recorded water temperature, salinity, dissolved oxygen (DO), current velocity, light intensity, pH, nitrate, and phosphate. Species were identified via an integrative morphological and database-validated approach. A total of 50 species were recorded: 30 shared, 12 mangrove-exclusive, and 8 reef-exclusive. Generalists (e.g., Amphipleura pellucida, Cerataulina smithii) showed broad tolerance, whereas specialists (e.g., Nitzschia sigma, Achnanthes brevipes) indicated habitat specificity. Mangroves exhibited greater salinity swings and lower DO/light, while reefs had stable, oxygen-rich, well-illuminated conditions (p < 0.05). Correlation analyses revealed significant inverse relationships between salinity and DO/light. Microalgal genera were classified into ten bioindicator categories, providing a novel framework for ecosystem monitoring. This work establishes baseline data and introduces a targeted bioindicator scheme for coastal management.
Open Access: Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title: Proceedings of the 3rd International Seminar on Fish and Fisheries Sciences (ISFFS 2025)
Series: Advances in Biological Sciences Research
Publication Date: 29 December 2025
ISBN: 978-94-6463-942-1
ISSN: 2468-5747
DOI: 10.2991/978-94-6463-942-1_9 How to use a DOI?
Open Access: Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

ris enw bib

TY  - CONF
AU  - Sri Puji Astuti
AU  - Moch. Affandi
AU  - Agoes Soegianto
PY  - 2025
DA  - 2025/12/29
TI  - Assessment of Microalgal Diversity, Community Composition, and Environmental Drivers in Coral Reef and Mangrove Habitats of Sekotong Coastal, Lombok Island
BT  - Proceedings of the 3rd International Seminar on Fish and Fisheries Sciences (ISFFS 2025)
PB  - Atlantis Press
SP  - 83
EP  - 100
SN  - 2468-5747
UR  - https://doi.org/10.2991/978-94-6463-942-1_9
DO  - 10.2991/978-94-6463-942-1_9
ID  - Astuti2025
ER  -

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