哲帕拉长岛水域人工底质上硅藻浮游生物的生长情况

Syauqina Nashihi Aufar, Agus Sabdono, Diah Permata Wijayanti, M. Munasik
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引用次数: 0

摘要

潘章岛海水的退化日益加剧,导致底栖栖生物大量繁殖。采购硬基质作为人工鱼礁的材料,是在显微镜下观察底栖生物演替模式的努力之一。本研究的目的是确定土工聚合物混凝土和普通混凝土底质中硅藻数量和组成的差异。采用的方法是现场实验法,将不同的混凝土基质,即土工聚合物混凝土(BA)和普通混凝土(BT),浸泡在潘庄岛 3 米深的海水中 2 个月。使用扫描电子显微镜(SEM)方法在显微镜下观察浮游植物在基质上的生长情况。观察时间分别为 1 天(T1)、7 天(T2)、14 天(T3)、28 天(T4)和 56 天(T5)。结果表明,土工聚合物(BA)和普通混凝土(BT)基质在硅藻的发育方面存在差异。在这两种基质上,从浸泡 1 天开始就发现有浮游生物生长。BA 底质上的浮游生物密度和多样性均高于 BT 底质,密度分别为 2535 cells cm-2 和 73 cell cm-2,H'Shanon Wiener 的多样性分别为 4.07 和 0.33。这项研究的益处在于确定人工基质上生物膜形成的初始演替,作为珊瑚礁修复计划中人工珊瑚礁的建筑材料,尤其是在边缘珊瑚礁条件下。 在Pulau Panjang岛进行的珊瑚礁退化研究(Degradasi perairan laut di Pulau Panjang semakin meningkat mengakibatkan produksi perifiton bentik yang tinggi)。基质材料作为一种可持续发展的材料,可提供最有效的解决方案,用于在水稻田中生产高产优质的水稻。 本研究的目的是在地球藻和偏球藻基质上获得硅藻的分布和组成。实验方法是一种实验圈测法,在 Panjangdi 岛上的 2 个大年初一至初三的海拔 3 米范围内,对地聚合物饵料(BA)和生物饵料(BT)的饵料基质进行研究。用扫描电子显微镜(SEM)测量基底的厚度。 检测时间分别为 1 天(T1)、7 天(T2)、14 天(T3)、28 天(T4)和 56 天(T5)。在土工聚合物基质(BA)和生物质基质(BT)上都有硅藻栖息地。对每种基质的硅藻围岩在 1 个月内都能达到一定的密度。BA基质的密度和粒径与BT基质相当,密度分别为2535 sel cm-2 和73 sel cm-2,粒径分别为4.07和0.33。这表明,生物膜在基质中的生长速度是水生植物生长的基础,是水生植物边际生境修复计划的基础。
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Perkembangan Diatom Perifiton Pada Substrat Buatan di Perairan Pulau Panjang, Jepara
Degradation of marine waters in Panjang Island is increasing resulting in high production of benthic periphyton. Procurement of hard substrate as material for artificial reefs is one of the efforts to see the succession pattern of benthic periphyton microscopically. The purpose of this study was to determine the differences in the abundance and composition of diatoms in geopolymer concrete and ordinary concrete substrates. The method used is the field experimental method, immersing different concrete substrates, namely geopolymer concrete (BA) and ordinary concrete (BT) in the sea waters of Panjang Island at a depth of 3 m for 2 months. Periphyton growth on the substrate was observed microscopically using the Scanning Electronic Microscope (SEM) method. Observations were made at immersion time of 1 day (T1), 7 days (T2), 14 days (T3), 28 days (T4), and 56 days (T5). The results showed that there were differences in the development of Periphyton Diatoms between geopolymer (BA) and ordinary concrete (BT) substrates. On both substrates, periphyton growth was found starting from the observation of soaking for 1 day. The density and diversity of periphyton on the BA substrate was higher than that of the BT substrate, with a density of 2535 cell cm-2 and 73 cell cm-2, respectively, and the diversity of H'Shanon Wiener was 4.07 and 0.33. The benefit of this research is to determine the initial succession of biofilm formation on artificial substrates as a building material for artificial reefs for coral reef restoration programs, especially in marginal reef conditions.  Degradasi perairan laut di Pulau Panjang semakin meningkat mengakibatkan produksi perifiton bentik yang tinggi. Pengadaan substrat keras sebagai bahan terumbu buatan menjadi salah satu upaya untuk melihat pola suksesi perifiton bentik secara mikroskopis.  Tujuan dilakukannya penelitian ini untuk mengetahui perbedaan kelimpahan dan komposisi diatom pada substrat beton geopolimer dan beton biasa. Metode yang digunakan yaitu metode eksperimental lapangan, dilakukan perendaman substrat beton yang berbeda yaitu beton geopolymer (BA) dan beton biasa (BT) di perairan laut pulau Panjangdi pada kedalaman 3 m selama 2 bulan. Pertumbuhan perifiton pada substrat diamati secara mikroskopis menggunakan metode Scanning Electronic Microscope (SEM).  Pengamatan dilakukan pada lama perendaman 1 hari (T1), 7hari (T2), 14 hari (T3), 28 hari (T4), dan 56 hari (T5). Hasil penelitian menunjukkan ada perbedaan Perkembangan Diatom Perifiton antara substrat geopolymer (BA) dan beton biasa (BT). Pada ke dua substrat dijumpai pertumbuhan perifiton mulai pengamatan perendaman selama 1 hari. Densitas dan keragaman perifiton pada substrat BA lebih tinggi daripada substrat BT yaitu masing-masing dengan densitas 2535 sel cm-2 dan 73 sel cm-2, dan keragaman H’Shanon Wiener  sebesar 4,07 dan 0,33. Manfaat dari penelitian ini adalah untuk mengetahui suksesi awal pembentukan biofilm pada substrat buatan sebagai bahan penyusun terumbu buatan untuk program restorasi terumbu karang khususnya pada kondisi terumbu marginal.
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