scholarly journals Potentially harmful Ostreopsis spp. in the coastal waters of Alexandria - Egypt

2012 ◽  
Vol 13 (2) ◽  
pp. 208 ◽  
Author(s):  
A. ISMAEL ◽  
Y. HALIM
Keyword(s):  
Green Algae ◽  
Coastal Waters ◽  
Red Algae ◽  
Brown Algae ◽  
Macroalgal Species ◽  
Prorocentrum Lima ◽  
Benthic Cyanobacteria ◽  
Lower Abundance ◽  
Benthic Dinoflagellates ◽  
First Time

Ostreopsis spp. has been reported for the first time from the Egyptian Mediterranean waters. Macroalgal samples were collected monthly between June 2005 and December 2007, from the rocks at Abu Qir, from less than 1.5 m depth, and their associated microalgae examined. Populations of two Ostreopsis morphotypes were found to occur in this location, east of Alexandria, viz., O. cf ovata Fukuyo and Ostreopsis morph1. The Ostreopsis spp. was abundant and dominant during the summer. They were more abundant as epiphytes of the brown algae Padina sp. and Sargassum sp., less abundant on the red algae Corallina sp., Jania sp., Laurencia sp. and even less so on the green algae Ulva spp. Ostreopsis cf. ovata was also identified during the summer months on the same macroalgal species, although in a much lower abundance. Ostreopsis spp. alternated in dominance with the benthic cyanobacteria Oscillatoria spp. and the diatom Licmophora sp. Other benthic dinoflagellates recorded at low abundance included Amphidinium carterae, Gymnodinium sp. and Prorocentrum lima.

scholarly journals ADICIONES A LAS MACROALGAS DE LOS ARRECIFES CORALINOS DE LAS ISLAS DEL ROSARIO, CON NUEVOS REGISTROS PARA EL CARIBE COLOMBIANO Y EL ATLANTICO

2016 ◽  
Vol 22 ◽  
Author(s):  
Germán Bula Meyer ◽  
Guillermo Díaz Pulido ◽  
Argemiro Celis Rincón
Keyword(s):  
Coral Reefs ◽  
Atlantic Ocean ◽  
Green Algae ◽  
Red Algae ◽  
Caribbean Sea ◽  
Macroalgal Species ◽  
Taxonomic Changes ◽  
Place Of Origin ◽  
First Time ◽  
Made In

Twenty macroalgal species are added to the flora of coral reefs of the Rosario Islands, Colombian Caribbean Sea. Four species of Chlorophyta, three species of Phaeophyta and thirteen of Rhodophyta. Among the mentioned species, the green algae Udotea caribaea Littler et Littler and Batophora oerstedii J. Agardh and the red algae Rhodogorgon ramosissima J. Norris et Bucher, Rhodogorgon carriebowensis J. Norris et Bucher, Hydrolithon borgesenii (Foslie) Foslie and Champia vieillardii Kützing, are reported for the first time for the Colombian Caribbean; and Lithophyllum brachiatum (Heydrich) Lemoine and Antithamnion percurrens Dawson for the Atlantic Ocean. Taxonomic changes are made in some species previously reported for the islands, and the probable place of origin and temporal presence of Sargassum fluitans Borgesen and Turbinaria turbinata (Linné) Kuntze are explained.

scholarly journals The biodiversity of macroalgae in the coastal waters of Kora-Kora, East Lembean Sub-District, Minahasa Regency

2019 ◽  
Vol 7 (2) ◽  
pp. 383
Author(s):  
Rene Ch. Kepel ◽  
Desy M. H. Mantiri
Keyword(s):  
Data Collection ◽  
Green Algae ◽  
Coastal Waters ◽  
Red Algae ◽  
Brown Algae ◽  
Morphological Studies ◽  
Survey Results

This study was carried out in coastal waters of Kora-Kora, East Lembean Sub-District, Minahasa Regency with an objective of knowing the taxa composition of macroalgae through morphological studies. Data collection used exploring survey. Results found 10 species that consisted 1 species of red algae (Rhodophyta), 6 species of brown algae (Phaeophyta), and 3 species of green algae (Chlorophyta).Keyword: Macroalgae, Kora-Kora. ABSTRAKPenelitian ini dilakukan di perairan pesisir Kora-Kora, Kecamatan Lembean Timur, Kabupaten Minahasa dengan tujuan untuk mengetahui komposisi taksa makroalga melalui pendekatan morfologi. Pengambilan data dilakukan dengan menggunakan metode survei jelajah. Hasil penelitian menemukan 10 spesies, yang terdiri dari 1 spesies alga merah (Rhodophyta), 6 spesies alga cokelat (Phaeophyta)) dan 3 spesies alga hijau (Chlorophyta).Kata Kunci: makroalga, Kora-Kora.

scholarly journals Diversity and Distribution of Polychaetes Associated with Macroalgae along the Alexandria Coast, Egypt

2018 ◽  
Vol 28 (2) ◽  
pp. 67-79
Author(s):  
Rasha Hamdy Rasha Hamdy
Keyword(s):  
Green Algae ◽  
Red Algae ◽  
Brown Algae ◽  
Algal Species ◽  
Polychaete Species ◽  
Macroalgal Species ◽  
The Relationship ◽  
Benthic Macroalgae

The relationship between benthic macroalgae and associated polychaetes was studied monthly from October 2014 to October 2015 along the Alexandria coast, Egypt. A total of 56 polychaete species were found among 28 macroalgal species, which belonging to green, brown and red algae. The red algae hosted pronouncedly higher number of polychaete species than the brown and green algae, particularly during winter and spring, while green algae were associated with higher number of polychaete species in January, April, August and October 2015. In contrast, the average count of polychaete individuals associated with the green algae was higher in winter and autumn than that recorded with the red algae, while low with both red and green algae in spring and summer, and very poor within the brown algae. The present study revealed that the structure of algal species my affect the diversity and abundance of the associated polychaetes and the diversity of these worms varied among the hosting algal species.

scholarly journals DELAYED LIGHT ACTION SPECTRA OF SEVERAL ALGAE IN VISIBLE AND ULTRAVIOLET LIGHT

1958 ◽  
Vol 42 (2) ◽  
pp. 243-250 ◽  
Author(s):  
G. C. McLeod
Keyword(s):  
Green Algae ◽  
Red Algae ◽  
Brown Algae ◽  
Light Emission ◽  
Incident Light ◽  
Ultraviolet Region ◽  
Blue Green Algae ◽  
Action Spectra ◽  
Light Production ◽  
Carotenoid Absorption

Action spectra for delayed light production by several algae were determined from 250 to 750 mµ incident light. In the visible portion of the spectrum the action spectra resemble those reported by previous workers for photosynthesis and light emission. Blue-green algae had a maximum at 620 mµ, red algae at 550 mµ, whereas green and brown algae have action spectra corresponding to chlorophyll and carotenoid absorption. In the ultraviolet portion of the spectrum delayed light is emitted by algae down to 250 mµ incident light. The action spectra of the different algae are not alike in the ultraviolet portion of the spectrum. This indicates that pigments other than chlorophyll must be sensitizing or shielding the algae in the ultraviolet region.

scholarly journals KEKAYAAN DAN POTENSI SENYAWA BIOAKTIF MAKROALGA DI PESISIR ATEP OKI, KABUPATEN MINAHASA, SULAWESI UTARA

2020 ◽  
Vol 8 (3) ◽  
pp. 7
Author(s):  
Silsia Dorkas Winowoda ◽  
Marina Flora Oktavine Singkoh ◽  
Ratna Siahaan
Keyword(s):  
Green Algae ◽  
Bioactive Compounds ◽  
Red Algae ◽  
Brown Algae ◽  
North Sulawesi ◽  
Sampling Locations

This study aims to analyze the richness and potential of macroalgae bioactive compounds on the Atep Oki Coast, District of Minahasa, North Sulawesi Province. This research was conducted in October 2019 until January 2020. Sampling used the roaming method in a predetermined location that is Atep Oki tidal/ intertidal coast. Sampling locations are spread over six coordinate points. Macroalgae found on the Atep Oki Coast assessed ten species belonging to three phyla, namely Chlorophyta (green algae), Ochrophyta (brown algae) and Rhodophyta (red algae). Chlorophyta members mean six species. Ochrophyta has members of three species and members of Rhodophyta only one species. The types of macroalgae found on the Atep Oki Coast provide bioactive compounds. Keywords : Macroalgae, Bioactive Compounds, Atep Oki Minahasa CoastAbstrak Penelitian ini bertujuan untuk menganalisis kekayaan jenis dan potensi senyawa bioaktif makroalga di Pesisir Atep Oki, Kabupaten Minahasa, Provinsi Sulawesi Utara. Penelitian ini telah dilaksanakan pada bulan Oktober 2019 sampai Januari 2020. Pengambilan sampel menggunakan metode jelajah di lokasi yang telah ditentukan yaitu pesisir pasang surut/intertidal Atep Oki. Lokasi pengambilan sampel tersebar di enam titik-titik koordinat. Makroalga yang ditemukan di Pesisir Atep Oki berjumlah sepuluh species yang tergolong ke dalam tiga filum yaitu Chlorophyta (alga hijau), Ochrophyta (alga cokelat) dan Rhodophyta (alga merah). Anggota Chlorophyta berjumlah enam species. Ochrophyta memiliki anggota tiga species dan anggota Rhodophyta hanya satu species. Jenis-jenis makroalga yang ditemukan di Pesisir Atep Oki berpotensi menghasilkan senyawa bioaktif. Kata kunci : Makroalga, Senyawa Bioaktif, Pesisir Atep Oki Minahasa

scholarly journals Marine benthic algal flora of Ascension Island, South Atlantic

2014 ◽  
Vol 97 (4) ◽  
pp. 681-688 ◽  
Author(s):  
Konstantinos Tsiamis ◽  
Akira F. Peters ◽  
Dawn M. Shewring ◽  
Aldo O. Asensi ◽  
Pieter Van West ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Red Algae ◽  
Brown Algae ◽  
South Atlantic ◽  
Marine Macroalgae ◽  
Algal Flora ◽  
Red Macroalgae ◽  
Ascension Island ◽  
Infraspecific Taxa ◽  
First Time

This paper provides a comprehensive checklist of the marine benthic macroalgal flora of Ascension Island (tropical South Atlantic Ocean), based on both new collections and previous literature. 82 marine macroalgae were identified from our work, including 18 green algae (Ulvophyceae), 15 brown algae (Phaeophyceae) and 49 red algae (Rhodophyta). Among our collections, 38 species and infraspecific taxa are reported for the first time from Ascension Island, including seven green, three brown and 28 red macroalgae, raising the total number of seaweeds recorded in Ascension so far to 112 taxa in species and infraspecific level. No seagrasses have been recorded at Ascension Island.

scholarly journals Inventory and Historical Changes in the Marine Flora of Tomioka Peninsula (Amakusa Island), Japan

Diversity ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 158
Author(s):  
Eduard A. Titlyanov ◽  
Tamara V. Titlyanova ◽  
Mutsunori Tokeshi ◽  
Xiubao Li
Keyword(s):  
Green Algae ◽  
Red Algae ◽  
Brown Algae ◽  
Cold Water ◽  
Current Data ◽  
Temperate Region ◽  
Tropical Regions ◽  
Marine Flora ◽  
The Tropics ◽  
Warm Temperate

Intensive algal sampling was conducted from 2012 to 2017 in the Tomioka Peninsula, Amakusa-Shimoshima Island (the East China Sea, Japan), yielding a total of 293 benthic macroalgal taxa, of which 63% were red algae, 16% were brown algae, and 19% were green algae. The majority (69%) of species were previously recorded only for the tropics and/or subtropics, whereas 31% of species were recorded for temperate latitudes. Among all species of algae found from 2012 to 2017 in the Tomioka Peninsula, 163 species (56%) were newly identified species for Amakusa-Shimoshima Island, including six taxa, which were recorded in Japan for the first time. Comparison of the current data from the Amakusa-Shimoshima Island with those of nearby tropical regions suggested that the recent marine flora of the Amakusa-Shimoshima Island was more closely affiliated with the flora of a warm-temperate region. Moreover, we found that the benthic flora of the Tomioka Peninsula was significantly changed between the 1950s (Segawa & Yoshida 1961) and 2012–2017. For example, the species diversity was increased by two times, mainly at the expense of red and green algae, and the biogeographic status of the benthic flora was changed from the flora of a cold-temperate region to the flora of a warm-temperate region, which could be attributed to an introduction of red algae from the tropics of South East Asia and widespread opportunistic green algae, as well as the disappearance of cold-water brown algae. Collectively, our data suggested that these changes were driven by the global warming effect on the ocean.

scholarly journals Elemental accumulation in the black sea brown algae cystoseira studied by neutron activation analysis

2014 ◽  
Vol 21 (1) ◽  
pp. 9-23 ◽  
Author(s):  
Alexandra Kravtsova ◽  
Nataliya Milchakova ◽  
Marina Frontasyeva
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Black Sea ◽  
Coastal Waters ◽  
Brown Algae ◽  
The Black Sea ◽  
Cystoseira Barbata ◽  
Elemental Accumulation ◽  
First Time

Abstract For the first time the concentration of 26 macro- and microelements (Na, Mg, Al, Cl, K, Ca, Sc, V, Mn, Fe, Co, Ni, Zn, As, Br, Rb, Sr, Sb, I, Cs, Ba, Sm, Nd, Ag, Au, and U) in the thalli of brown algae Cystoseira barbata C. Ag. and Cystoseira crinita (Desf.) Bory was determined by instrumental neutron activation analysis (INAA), Sevastopol region, south-western Crimea, the Black Sea. The observed peculiarities of the elemental accumulation showed that Cystoseira spp. can be used as a biomonitor of coastal waters pollution in the study area.

scholarly journals SESSILE ORGANISMS COLONISATION ON CONCRETE SUBSTRATE “CRYPTO” AT DIFFERENT DEPTH IN THE PATCH REEF OF PRAMUKA ISLAND

2017 ◽  
Vol 9 (1) ◽  
pp. 393
Author(s):  
Genadi Algadri ◽  
Beginer Subhan ◽  
Dondy Arafat ◽  
Ahmad Taufik Ghozali ◽  
Prakas Santoso ◽  
...  
Keyword(s):  
Green Algae ◽  
Red Algae ◽  
Brown Algae ◽  
Patch Reef ◽  
Artificial Reef ◽  
Concrete Block ◽  
Test Results ◽  
Rehabilitation Process ◽  
The Media ◽  
Sessile Organisms

<p class="Paragraf"><em>Acceleration of the process of recovery of damaged reefs require rehabilitation, management and supervision of well-planned and sustainable. One of the rehabilitation process is to create artificial reef. This study aims to look at the rate of attachment of sessile organisms on cement media called “crypto”. A total of </em><em>270 cement media at each shelf. The size of cement media is 5x5x1 cm. The cement media were deployed at a depth of 6 meters and 10 meters. The rate of attachment of sessile organisms was compared between the upper and lower of the media side at each depth and between depths. Different organisms was observed colonized concrete media such as shells, sponges, worms, green algae, red algae, and brown algae. Percentage of coverage </em><em>of sessile biota at a depth of 6 meters </em><em>was significantly </em><em>higher than 10 meters</em><em>. Percentage of coverage</em><em> of sponges at a depth of 6 meters and 10 meters, showed no significantly different (P = 0.0670).</em><em> </em><em>The other sessile biota, value of the test results showed significant differences between depths, such as the brown algae (P&lt; 0.0001), red algae (P = 0.0003), and  green algae (P = 0.0022). The </em><em>type </em><em>succession occurs in this research </em><em>was likely a</em><em> primary succession.</em><em></em></p><p class="Paragraf"><em>                                                        </em></p><p><strong><em>Keywords</em></strong><em>: sessile biota, biodiversity, rehabilitation, concrete block,                         colonization, succession</em></p>

scholarly journals The biodiversity of macroalgae in the coastal waters of Blongko Village, Sub-District of Sinonsayang, District of South Minahasa

2018 ◽  
Vol 6 (1) ◽  
pp. 174
Author(s):  
Rene Charles Kepel ◽  
Desy M. H. Mantiri ◽  
Anton Rumengan ◽  
. Nasprianto
Keyword(s):  
Data Collection ◽  
Green Algae ◽  
Coastal Waters ◽  
Brown Algae ◽  
Morphological Studies ◽  
Survey Results

This study was carried out in coastal waters of Blongko Vilage, Sub-District of Sinonsayang, District of South Minahasa with an objective of knowing the taxa composition of macroalgae through morphological studies. Data collection used exploring survey. Results found 14 species that consisted 8 species of green algae, 2 species of brown algae, and 4 species of red algae.Keyword: Macroalgae, Blongko.  Abstrak Penelitian ini dilakukan di perairan pesisir Blongko, Kecamatan Sinonsayang, Kabupaten Minahasa Selatan dengan tujuan untuk mengetahui komposisi taksa makroalga melalui pendekatan morfologi. Pengambilan data dilakukan dengan menggunakan metode Survei Jelajah. Hasil penelitian menemukan 14 spesies, yang terdiri dari 8 spesies alga hijau, 2 spesies alga cokelat dan 4 spesies alga merah.Kata Kunci: makroalga, Blongko.

Sign in / Sign up

Export Citation Format

Share Document