Zonation patterns, composition and diversity of macroalgal communities in the eastern coasts of Qeshm Island, Persian Gulf, Iran

Abstract

This study investigates the spatial and temporal variation of intertidal macroalgae along the eastern coasts of Qeshm Island, Persian Gulf, Iran. Monthly sampling of abundance, biomass, richness and diversity of macroalgae at three intertidal levels was carried out at two different sites during 1 year. The samples were collected every month using quadrats (0.5 × 0.5 m) from October 2012 to September 2013. The species dry weight was applied to examine changes in biomass and assemblage composition of intertidal macroalgae using univariate and multivariate analyses. A total of 42 seaweed species (10 Chlorophyta, 9 Phaeophyceae, and 23 Rhodophyta) were identified. The results confirmed a temporal pattern in the growth of the algal species which also showed a biomass zonation pattern from upper to lower intertidal. The annual mean biomass of macroalgae was highest in winter (29.3 ± 9.8 g dry wt m−2 ) and the lowest in autumn (17.3 ± 13.5 g dry wt m−2 ). The annual dominant species by biomass was Padina sp. followed by Padina australis. The most common species in the area, during the sampling period include Ulva intestinalis, Ulva lactuca, Palisada perforata and Padina sp. According to the similarity percentages analysis (SIMPER), the species Ulva intestinalis, Dictyosphaeria cavernosa (Chlorophyta), Padina australis (Phaeophyceae), Champia spp., Centroceras clavulatum and Palisada perforata (Rhodophyta) were responsible for the most dissimilarity of species composition between four seasons during the sampling period. BIOENV analysis indicated that the main environmental factors structuring macroalgal community at the study area were TDS and pH. The simple macroalgae community on the eastern coast of Qeshm Island and absence of slow-growing perennial macroalgae, such as members of the Sargassaceae, known from the lower shore at other intertidal localities along the island's coast might relate to the predominantly unsuitable sandy-stony substrates unsuitable for their colonization and the unfavourable impact upon them of urbanization.

STANDING-STOCK BIOMASS AND DIVERSITY OF Caulerpa (Chlorophyta) IN SOLONG-ON, SIQUIJOR ISLAND, PHILIPPINES

“…Although sampling was done for only three months. In contrast to other studies done elsewhere, which showed temporal variation (Tribollet & Vroom, 2007;Mendoza & Soliman, 2013;Kokabi et al 2016), the present study do not. The homogeneity of the environmental variables may have also accounted for this result.…”

Green synthesis of zinc oxide nanoparticles using Seaweed aqueous extract and evaluation of antibacterial and ecotoxicological activity

“…Hypnea musciformis is a red macroalgae belonging to the Cystocloniaceae family. It is fast-growing opportunistic seaweed that dominated the macroalgal communities in some eastern coasts of Qeshm Island from April to May (Kokabi et al 2016). This species is a carrageenan yielding seaweed commercially cultivated throughout the world (Vadlapudi and Amanchy 2017).…”

Struktur Komunitas Makroalga Di Perairan Temajuk Kecamatan Paloh Kalimantan Barat

“…Padina terdistribusi secara luas di perairan tropis dan subtropis [46]. Genus tersebut merupakan kelompok yang paling umum ditemukan di lingkungan perairan dan menjadi spesies dominan [51][52] [53] dan selalu dapat ditemukan di semua musim [54]. Jenis Padina memiliki holdfast yang menyerupai cakram sehingga mampu menempel pada substrat keras dan dapat bertahan di perairan dengan kondisi arus dan gelombang kuat [55].…”

“…Di Kalimantan Barat, Sargassum banyak ditemukan di perairan Pulau Lemukutan [12], Pulau Kabung [10][31], Singkawang [63], Pulau Temajok Kabupaten Mempawah. Keberadaan dan kelimpahan makroalga sangat berkaitan erat dengan kondisi lingkungan perairan [64], seperti musim [51][65] [66], kedalaman [67], suhu [36], dan karakteristik substrat dasar [35][68].…”