Detecting Alaria esculenta and Laminaria digitata (Laminariales, Phaeophyceae) gametophytes in red algae, with consideration of distribution patterns in the intertidal zone

Phycologia ◽  
2018 ◽  
Vol 57 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Trevor T. Bringloe ◽  
Charlotte A.B. Bartlett ◽  
Emma S. Bergeron ◽  
Katherine S.A. Cripps ◽  
Nicole J. Daigle ◽  
...  
Keyword(s):  
Red Algae ◽  
Intertidal Zone ◽  
Distribution Patterns ◽  
Laminaria Digitata ◽  
Alaria Esculenta

Factors influencing hydroids (Cnidaria: Hydrozoa) biodiversity and distribution in Arctic kelp forest

2008 ◽  
Vol 88 (8) ◽  
pp. 1567-1575 ◽  
Author(s):  
Marta Ronowicz ◽  
Maria Wlodarska-Kowalczuk ◽  
Piotr Kuklinski
Keyword(s):  
Kelp Forest ◽  
Distribution Patterns ◽  
Sediment Concentration ◽  
Saccharina Latissima ◽  
Kelp Forests ◽  
Laminaria Digitata ◽  
Alaria Esculenta ◽  
Algal Host ◽  
A Site ◽  
West Spitsbergen

The biodiversity and distribution patterns of epiphytic hydroids were studied in kelp forests (composed of Laminaria digitata, Saccharina latissima and Alaria esculenta) located in an Arctic glaciated fiord (Hornsund, west Spitsbergen). In total, twenty-eight species were found colonizing algae, stones connected to holdfast, and overgrowing the surface of other animals associated with kelps. The characteristics of the algal host (e.g. algae species, age, rhizoid volume or biomass) did not show any effect upon hydroid species richness or species composition. High hydroid biodiversity was strongly dependent on microsubstrate heterogeneity. The highest biodiversity as well as frequency of hydroid occurrence were noted at a site located furthest from the glacier and characterized by the lowest sediment concentration and sedimentation rate. Sexual reproduction also seemed to be inhibited by glacier-derived disturbance. Of ten fertile species found at the ‘clearest’ site only two were fertile at sites under the strong influence of such perturbations. Potential physical drivers of species occurrence were linked to the activity of tidal glaciers, particularly to high loads of mineral sedimentation and iceberg scouring.

A general method for determining translocation velocity in Laminariales

1981 ◽  
Vol 59 (2) ◽  
pp. 132-136 ◽  
Author(s):  
Richard G. Buggeln
Keyword(s):  
Pulse Method ◽  
Blade Surface ◽  
Laminaria Digitata ◽  
Incubation Chamber ◽  
Photoassimilate Translocation ◽  
Alaria Esculenta ◽  
Meristematic Region ◽  
Translocation Velocity ◽  
Distance Transport ◽  
General Method

The nondestructive pulse method for studying 14C-labelled photoassimilate translocation in Alaria esculenta has been adapted for species of Laminariales with flat, thick blades, in this case, Laminaria digitata. A 1-h pulse of [14C]bicarbonate(25 μCi) was applied to one side of the blade surface via a 12 mm diameter by 22 mm high, closed cylindrical incubation chamber. The upper 20-mm closed portion of the chamber was removed after the incubation period, the lower 2-mm open portion remained glued to the blade surface during the subsequent translocation period. A Geiger-Müller (G-M) detector probe with a 50 mm diameter end-window was used to measure the disappearance of radioactive organic matter from the pulsed region over the next 11–12 days. Accurate monitoring of the movement of 14C-labelled solutes through the cortex and into the medulla was confounded by changing absorption of radioactivity by the cortex. Uniform absorption was achieved once the translocatable radioactivity reached the medullary conducting cells (sieve filaments). Thus arrival and accumulation of 14C-labelled assimilate in the blade sink (meristem) was reliably measured with the G-M probe. For Laminaria digitata, the translocation velocity of the moving solute front was 1.7 cm∙h−1. The specific mass transfer of carbon was estimated at 0.4 mg C∙week−1∙mm−2 cross-sectioned medulla. Fifty-seven percent of assimilated carbon was exported in 10 days; 97% of the 14C remaining in the source was in insoluble matter and 3% was in soluble matter. Cutting sieve filaments on the sink side of the incubation chamber did not stop short distance transport through the cortex, but significant 14C-labelled photoassimilate was apparently unable to be re-routed around the cut as no radioactivity was detected in the sink area, the meristematic region at the base of the blade.

scholarly journals DISTRIBUTION AND ABUNDANCE OF MACROALGAE IN INTERTIDAL ZONE OF DRINI BEACH, GUNUNGKIDUL, DIY

2015 ◽  
Vol 2 (1) ◽  
pp. 514 ◽  
Author(s):  
Wiga Pratama ◽  
Shinta C. Dewi ◽  
Ihda Z.R. Sari ◽  
Anisa Hardiyati ◽  
Allan E. Wajong
Keyword(s):  
Data Analysis ◽  
Air Temperature ◽  
Red Algae ◽  
Intertidal Zone ◽  
Physicochemical Parameters ◽  
Temperature Data ◽  
Sampling Point ◽  
Percent Cover ◽  
Sampling Points ◽  
Water Temperature Data

<p>Macroalgae is a macroscopic algae living in the intertidal zone. Based on the dominant pigment algae can be divided into 3 groups, there are Chlorophyta (green algae), Phaeophyta (brown algae), and Rhodophyta (red algae). Macroalgae have ecological and economic roles that are beneficial for humans. This research aims to study of distribution and abundance of macroalgae in the intertidal zone of Drini Beach, Gunungkidul, Yogyakarta. The study was conducted on June 8, 2013. Data were collected using plot method with 100 x 100 cm2 quadratic plot at 17 sampling points. Measurement of physicochemical parameters in each sampling point including salinity, air temperature and water temperature. Data analysis was performed by calculating the percent cover of each type macroalgae. The results showed that macroalgae were found consist of 9 types of Rhodophyta, 7 types of Chlorophyta and 2 types of Phaeophyta. The highest abundance of macroalgae was Rhodophyta (50,76%), followed by Chlorophyta (43,37%) and the lowest one was Phaeophyta (5,88%). The highest abundance of macroalgae species is Chaetomorpha crassa (26,91%) and the lowest one is Gigartina sp. (0,02%). <br /><strong></strong></p><p><strong>Keywords</strong>: Distribution, Abundance, Macroalgae, Intertidal</p>

Seasonal changes in the intertidal algal communities of Sanya Bay (Hainan Island, China)

2014 ◽  
Vol 94 (5) ◽  
pp. 879-893 ◽  
Author(s):  
Eduard A. Titlyanov ◽  
Tamara V. Titlyanova ◽  
Xiubao Li ◽  
Gayle I. Hansen ◽  
Hui Huang
Keyword(s):  
Red Algae ◽  
Intertidal Zone ◽  
Rainy Season ◽  
Dominant Species ◽  
Hainan Island ◽  
Dry Season ◽  
Splash Zone ◽  
Intertidal Zones ◽  
Species Numbers ◽  
Sanya Bay

A floristic study of marine macrophytic algae and Cyanobacteria in the splash and intertidal zones at Luhuitou reef, Sanya Bay, Hainan Island, China, was conducted during the rainy and dry seasons of 2008−2012 utilizing 148 of the most common species. Macrophytic algal diversity increased from the splash zone to the low intertidal zone, while cyanobacterial diversity decreased. In the upper and middle intertidal zones, the dominant species (primarily highly productive ephemerals) changed frequently throughout each year. In the low intertidal zone, the dominant species (mainly annual fleshy, foliose and coriaceous forms) also changed. In the dry season, species numbers were 33% higher than in the rainy season. During the rainy season, Cyanobacteria dominated the splash zone, while green and red algae dominated in increasing numbers from the upper to the low intertidal zones. During the dry season the splash zone was devoid of all macrophytic algae, and only one species of Cyanobacteria survived. In the upper intertidal, Cyanobacteria and red algae prevailed, while in the mid and low zones, red and green algae were the most diverse. In spite of heavy pollution in Sanya Bay, there was no evidence of dramatic changes in species numbers or composition, and the marine flora was similar to that of unpolluted regions in the Indo-Pacific.

scholarly journals Pola sebaran jenis makroalga di zona intertidal perairan Malang Rapat Kecamatan Gunung Kijang, Kabupaten Bintan, Kepulauan Riau, Indonesia

2020 ◽  
Vol 4 (2) ◽  
pp. 65
Author(s):  
Amilia Jamilatun ◽  
Febrianti Lestari ◽  
Susiana Susiana
Keyword(s):  
Intertidal Zone ◽  
Environmental Parameters ◽  
Distribution Patterns ◽  
Quality Parameters ◽  
Research Station ◽  
Factors Affecting ◽  
Line Transects ◽  
Different Characteristics ◽  
Macro Algae

This study aims to determine the distribution patterns, and environmental parameters of macro algae waters in the Intertidal Zone of Malang Rapat waters Gunung Kijang District, Bintan Regency. This research was conducted in October-December 2019. The purposive sampling method was applied to 5 research station based on the different characteristics of each station that found macro algae. Macro algae sampling was carried out at each observation station using line transects. Placing transect lines at every station to collect 3 macro algae along 50 m, the determination of the first plot is based on the first point of finding macro algae that are drawn perpendicular to the coastline with a distance between the lines of 30 m. The results found 8 species of macro algae (seaweed) from 3 divisions namely Caulerpa serrulate, Halimeda opuntia, Chaetomorpha crassa, Sargassum polycystum, Sargassum cristaefolium, Padina australis, Gracilaria salicornia, Galaxaura fastigiate. Distribution patterns of macro algae in the waters of Malang Rapat between -4,212 - 1,708 with the category grouping at station 1 and equivalent at station 2, 3, 4, 5. Each station is dominated by brown algae with the genus Sargassum. Factors affecting the distribution of macro algae in intertidal zone are lights, temperature, pH, current and substrate. All water quality parameters fulfilled the optimum growth requirements of seaweed.

scholarly journals Diversity, Distribution Pattern, Morphometric of Box Mussel Septifer bilocularis (Linnaeus, 1758) on the Reef Flat in Cape Lampangi, South Minahasa

2014 ◽  
Vol 2 (1) ◽  
pp. 8 ◽  
Author(s):  
Grace Mustamu ◽  
Lawrence J. L Lumingas ◽  
Anneke V. Lohoo
Keyword(s):  
Intertidal Zone ◽  
Reef Flat ◽  
Sampling Method ◽  
Distribution Patterns ◽  
Average Density ◽  
Suspension Feeder ◽  
Total Weight ◽  
Dead Coral ◽  
Weight Index ◽  
Maximum Shell Length

Septifer bilocularis (Linnaeus, 1758) is a suspension feeder organisms which are found live clustered on dead coral . This study aims to estimate the average density, analyzes the distribution patterns and analyze morphometric aspects of a long-high (thick) relation, length-total weight relation and length-weight index without shell  relation of S. bilocularis at that location. Sampling method using transect squares method, with the length of each line is 50m, on each transect placed 10 squares (measuring 1m x 1m). Based on the data analysis of the average density in both transect was 214 individuals with a clustered deployment pattern, with a maximum shell length of 29,64mm. The relation between length and high of shell shows that the growth is allometri negative, length and total weight shell relationships is allometri negative, where the contents of the weight index does not increase with increasing length but declined. Box mussel Septifier bilocularis live clustered with very dense aggregations in intertidal reef flat area on the intertidal zone are exposed at the lowest tide at Cape Lampangi.   Keywords : box mussel, morphometric, Cape Lampangi, South Minahasa   ABSTRAK Septifer bilocularis (Linnaeus, 1758) merupakan organisme pemakan suspensi yang banyak ditemukan hidup secara mengelompok pada rataan terumbu karang mati. Penelitian ini bertujuan untuk menduga kepadatan rata-rata, menganalisis indeks dispersi atau pola sebaran dan menganalisis aspek morfometrik berupa hubungan panjang-tinggi (tebal), panjang-berat dan panjang-indeks berat tubuh tanpa cangkang dari S. bilocularis di lokasi tersebut. Pengambilan sampel menggunakan metode transek kuadrat, dengan panjang setiap garis 50 meter, pada masing-masing transek diletakkan 10 kuadrat (berukuran 1m x 1m). Berdasarkan analisis data kepadatan rata-rata secara keseluruhan (kedua transek) adalah 214 individu dengan pola penyebaran mengelompok, dengan panjang cangkang maksimum 29,64mm. Hubungan pertumbuhan panjang dan tinggi cangkang ‘allometri negatif’, hubungan panjang cangkang dan berat total ‘allometri negatif’, di mana pertambahan indeks isi tidak sejalan dengan pertambahan panjang tetapi menurun. Kerang kotak Septifier bilocularis hidup mengelompok dengan agregasi yang sangat padat di daerah intertidal rataan terumbu pada zona intertidal yang terekspos pada saat surut terendah di Tanjung Lampangi.   Kata kunci : karang kotak, morfometrik, Tanjung Lampangi, Minahasa Selatan

scholarly journals MACROZOOBENTHOS COMMUNITY STRUCTURE IN INTERTIDAL ZONE OF SAMBUNGO VILLAGE PESISIR SELATAN REGENCY OF WEST SUMATERA PROVINCE

2021 ◽  
Vol 4 (2) ◽  
pp. 106-111
Author(s):  
Bob Anggara ◽  
Afrizal Tanjung ◽  
Syafruddin Nasution
Keyword(s):  
Community Structure ◽  
Distribution Pattern ◽  
Intertidal Zone ◽  
Diversity Index ◽  
Distribution Patterns ◽  
Dominance Index ◽  
West Sumatra ◽  
Index Value ◽  
The Village

This research was conducted in the village of Sambungo, Silaut District, Pesisir Selatan Regency, West Sumatra Province in August 2020. The purpose of this study was to determine the structure of the macrozoobenthos community which includes: type, density, diversity, uniformity, dominance and distribution patterns. Sampling was done randomly at 3 stations, each station consists of 3 transects and each transect consists of 3 plots, namely in the upper middle and lower in the intertidal zone. The results of the study found 5 classes of macrozoobenthos with 9 species. The abundance values ​​obtained ranged from 3.33 - 5.11 ind/m2. The diversity index value ranges from 1.18-1.54 which is classified as moderate, while the dominance index value ranges from 0.39-0.52, namely there was no species that dominate, the uniformity index value ranges from 0.03-0.06 which is not balanced and the value of the distribution pattern ranges from 2.81 to 3.76 with the pattern of distribution in groups

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