Document Type : Original Article
Authors
1
1Environmental Science Doctoral Department, Postgraduate Program, Udayana University, St. Kampus Unud, Badung 80361, Bali, Indonesia. 2Department of Aquatic Resources Management, Faculty of Marine Science and Fisheries, Udayana University.
2
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Udayana. Udayana University. St. Kampus Unud, Badung 80361, Bali, Indonesia.
3
Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University. St. Kampus Unud, Badung 80361, Bali, Indonesia.
4
Department of Aquatic Resources Management, Faculty of Marine Science and Fisheries, Udayana University. St. Kampus Unud, Badung 80361, Bali, Indonesia.
Abstract
The open waters of Southeast Bali are influenced by Indian Ocean currents and nutrient influx, supporting diverse marine life, including macroalgae. Macroalgae serve as effective indicators of environmental health due to their community structure and species composition. This study aimed to characterize the community structure and composition of macroalgal species in Southeast Bali waters. Purposive sampling was conducted using quadrat transects at three stations: Serangan, Benoa Bay, and Gunung Payung coast. A total of 80 macroalgal species were identified, comprising 21 Chlorophyta, 17 Ochrophyta, and 42 Rhodophyta species. Percent cover of macroalgae ranged from 12.86 to 48.54% for Rhodophyta, 0.09 to 10.89% for Ochrophyta, and 30.08 to 63.37% for Chlorophyta. The average diversity index (H') was 2.346, indicating moderate diversity; the evenness index (E) averaged 0.642, reflecting high species evenness; and the dominace index (C) was 0.213, indicating low dominance. These results demonstrate a high composition and diversity of macroalgal communities in Southeast Bali waters, suggesting favorable environmental conditions that support macroalgal growth.
Keywords
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