Abstract
Phytoplankton as a producers and natural food for fish have an important role in aquatic ecosystems, thus indirectly affecting the availability of fish catches. The research was conducted at Siantan Island Coastal Area Anambas Islands District Riau Islands Province. This coastal area is one of the fishing grounds in Anambas Island. This study aims to analyze the community structure of phytoplankton at Siantan Island Coastal Area Anambas Islands District Riau Islands Province. Sampling was conducted during March and April 2012. Community structure parameters analyzed include Species Diversity Level, Species Uniformity Level, and Species Dominance Level. Data were analyzed spatially and temporally. Similarity between the sampling locations was conduted by Multivariate Analysis - Cluster. Results of data analysis showed that the phytoplankton of Bacillariophyceae Class found in the most abundant amount. Diversity Index Value indicates that the level of phytoplankton plankton community in a state of moderate. Species Uniformity Index Value and Species Dominance Index Value indicates that phytoplankton in the three sampling locations are generally in a state of uniform and no one dominates. All three sampling locations have relatively the same condition and between sampling times (morning, afternoon, and evening) are also not very different condition. Keywords: phytoplankton, coastal, Anambas Islands
Highlights
Phytoplankton as a producers and natural food for fish have an important role in aquatic ecosystems, indirectly affecting the availability of fish catches
This study aims to analyze the community structure of phytoplankton at Siantan Island Coastal Area Anambas Islands District Riau Islands Province
Illustrations of the Marine Plankton of Japan
Summary
Fitoplankton disebut juga plankton nabati, merupakan organisme mikroskopis yang dapat melakukan fotosintesis seperti halnya tumbuhan dan hidup melayanglayang di perairan. 2. Tujuan Penelitian Penelitian ini bertujuan untuk menganalisis struktur komunitas fitoplankton di Perairan Pulau Siantan Kabupaten Kepulauan Anambas Provinsi Kepulauan Riau. Hasil penelitian ini diharapkan dapat bermanfaat sebagai bahan rujukan bagi berbagai pihak, seperti Dinas Perikanan dan Kelautan serta kelompok nelayan di Kabupaten Kepulauan Anambas. Lokasi Penelitian Penelitian ini dilaksanakan di perairan Pulau Siantan Kabupaten Kepulauan Anambas Provinsi Kepulauan Riau. Pengambilan sampel dilakukan di 3 lokasi sampling, yaitu: perairan Tanjung Lambai, perairan Tanjung Momong, dan perairan Air Asuk. Perairan Tanjung Momong dan Air Asuk merupakan perairan yang berhadapan dengan kawasan hinterlands dan merupakan perairan tertutup; sedangkan perairan Tanjung Lambai merupakan perairan laut lepas. Pada perairan Tanjung Lambai dan Tanjung Momong ditetapkan 4 stasiun sampling, yaitu: Stasiun I (50 meter dari tepi pantai), Stasiun II (100 meter dari tepi pantai), Stasiun III (150 meter dari tepi pantai), dan Stasiun IV (200 meter dari tepi pantai). Dan bahan-bahan yang digunakan dalam penelitian ini adalah: es silica dan larutan lugol 4%
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