Abstract
Macro algae is a part of marine plants whose whole body is called the "thallus". Macro algae are widespread in tropical and sub-tropical waters. The purpose of this study was to determine the composition of the macro algae species, the width of the micro-habitat niches, and the overlapping of the micro-habitat niches in the intertidal zone of the waters of Sibu Island, Oba Utara District, Tidore Islands City. The data was collected using survey method using belt transects and squares measuring 1x1 m2 which are placed systematically in zigzags along the tansek belt. In this study, 20 species of macro algae were found in the waters of the island of Sibu, consisting of Halimeda macroloba, Halimeada opuntia forma chordata, Halimeda incrassata, Halimeda opuntia forma renschii, Chaetamorpha sp, Eucheuma cottonii, Sargassum duplicatum, S.polycestum, Turbina ornata, T. conoides, Padina boergesenii, Dictyota dichotoma, Amphiroa fragilissima, Acanthopora spicifera, Eucheuma denticulatum, E. spinosum, Glacilaria salicornia, Hypnea nidulans, Galaxaura apiculata. The results of the analysis of the width of the recesses showed that the macro algae species with the largest recess width were Eucheuma denticulatum with a value of 0.905, while Galaxura apiculata had the narrowest recess widths with a value of 0.200. Furthermore, based on the results of overlapping analysis of microhabitat niches, it shows that the overlap of microbaitate niches is quite large by Sargassum polycestum against Galaxaura apiculata with a value of 0.337, while the lowest was carried out by Halimeda macroloba against Galaxaura apiculata, Halimeda opuntia forma chordata against Galaxaura apiculata with a value of 0.337, while the lowest was carried out by Halimeda macroloba against Galaxaura apiculata, Halimeda opuntia forma chordata against Galaxaura apiculata, Eucheuma spinosum against Galaxaura apiculata with a value of 0.000.
Highlights
Alga merupakan bagian terbesar dari tumbuhan laut yang digolongkan sebagai tumbuhan tingkat rendah karena tidak memiliki akar batang serta daun, walaupun tampak berbeda, namun secara keseluruhan struktur tubuh alga hanya terdiri dari batang yang disebut “Thallus”, sehingga dimaskkan kedalam tumbuhan yang tidak berpembuluh (Trainor, 1978 ; Landau, 1992 : Yulianto, 1996))
Macro algae is a part of marine plants whose whole body is called the
The purpose of this study was to determine the composition of the macro algae species
Summary
Pulau Sibu meliputi 3 divisi yaitu (Chlorophyta, Phaeophyta, Rhodophyta), 3 kelas (Chlorophyceae, Phaeophyceae, Rhodophyceae), 7 ordo (Bryopsidales, Ulotrichales, Gigartinales, Fucales, Dictyotales, Ceramiales, Nemaliales), 9 famili (Halimedaceae, Ulotrichaceae, Solieraceae, Sargassaceae, Dictyotaceae, Rhodomelaceae, Glacilariaceae, Hypneaceae, Galaxauraceae), 12 genus (Halimeda, Chaetamorpha, Eucheuma, Sargassum, Turbinaria, Padina, Dictyota, Amphiroa, Acanthopora, Glacilaria, Hypnea, Galaxaura), dan 20 jenis (Halimeda macroloba, H.opuntia forma chordate, Halimeda incrassata, H. opuntia forma renschii, Chaetamorpha sp, Eucheuma cottonii, Sargassum duplicatum, Sargassum polycestum,Turbina ornata, Turbinaria conoides, Padina australis, Padina boergesenii, Dictyota dichotoma, Amphiroa fragilissima, Acanthhopora spicifera, Eucheuma denticulatum, Eucheuma spinosum, Glacilaria salicornia, Hypnea nidulans, Galaxaura apiculata). Spesies H. macroloba H.opuntia (forma chordate) H. incrassata H. opuntia (forma renschii) Chaetamorpha sp S. duplicatum S. polycestum T. ornate T. conoides D. dichotoma P. australis P. boergesenii A. fragilissima. 3. Lebar Relung Mikrohabitat Makroalga jenis makroalga yang mempunyai lebar relung terlebar adalah Eucheuma denticulatum dengan nilai 0,905, dikuti oleh Halimeda opuntia formarenschii, Halimeda incrassata, Eucheuma spinosum, Halimeda macroloba, Halimeda opuntia forma chordata, Sargassum polycestum, Glacilaria Salicornia, Dictyota dichotoma, Padina australis, Padina boergesenii, Sargassum duplicatum, Turbinaria conoides, Amphiroa fragilissima, Acanthophora spicifera, Chaetamorpha sp, Eucheuma cottoni, Hypnea nidulans, Turbinaria ornata. 4. Tumpang Tindih Relung Mikrohabitat Makroalga Tumpah tindih relung mikrohabit cukup besar dilakukan oleh makroalga jenis Sargassum polycestum terhadap Galaxaura apiculata sebesar 0,337, sedangkan tumpah tindih relung sedikit atau kecil terdapat pada makroalga jenis Halimeda macroloba terhadap Galaxaura apiculata, Halimeda opuntia forma chordata terhadap Galaxaura apiculata Halimeda incrassata terhadap Galaxaura apiculata, Eucheuma spinosum terhadap Galaxaura apiculata dengan nilai 0,000. Hi 0,200 0,203 - 0,119 0,036 0,031 0,071 0,051 0,017 0,059 0,065 0,063 0,091 0,050 0,092 0,152 0,201 0,086 0.034 0 Hof 0,122 0,122 0,121 - 0,251 0,250 0,242 0,193 0,242 0,240 0,225 0,229 0,220 0,230 0,239 0,148 0,126 0,220 0,252 0,283 Csp 0,014 0,016 0,017 0,113 - 0,200 0,176 0,142 0,201 0,181 0,166 0,169 0,150 0,173 0,168 0,055 0,018 0,151 0,202 0,245 Ec 0,012 0,013 0,014 0,111 0,198 - 0,174 0,138 0,198 0,178 0,162 0,167 0,146 0,175 0,160 0,056 0,016 0,149 0,199 0,239 Sd 0,040 0,042 0,041 0,137 0,220 0,221 - 0,158 0,218 0,201 0,186 0,190 0,169 0,196 0,185 0,081 0,043 0,171 0,222 0,263 Sp 0,046 0,045 0,044 0,164 0,267 0,264 0,239 - 0,274 0,244 0,230 0,230 0,208 0,220 0,243 0,088 0,046 0,201 0,270 0,337
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