A checklist of the benthic marine algae of the Northern Arabian Sea coast of the Sultanate of Oman

2018 ◽  
Vol 61 (5) ◽  
pp. 481-498
Author(s):  
Michael J. Wynne
Keyword(s):  
Green Algae ◽  
Red Algae ◽  
Brown Algae ◽  
Arabian Sea ◽  
Marine Algae ◽  
Sultanate Of Oman ◽  
Northern Arabian Sea ◽  
New Ideas ◽  
Sea Coast

Abstract An updated checklist of the benthic marine algae (seaweeds) of the Northern Arabian Sea coast of the Sultanate of Oman is presented, with a total of 402 taxa, consisting of 75 taxa of brown algae (Phaeophyceae), 238 taxa of red algae (Rhodophyta), and 89 taxa of green algae (Chlorophyta). Obsolete names and taxonomic synonyms as well as information on mis-identified names are provided. The classification in many instances reflects new ideas derived from the results of molecular-based phylogenetics. A total of 18 taxa of benthic marine algae are newly reported for Oman.

Martensia incipiens (Delesseriaceae, Rhodophyta), a newly recognized species of red algae from the Sultanate of Oman

Phytotaxa ◽  
2019 ◽  
Vol 419 (2) ◽  
pp. 203-208
Author(s):  
MICHAEL J. WYNNE
Keyword(s):  
Red Algae ◽  
Morphological Feature ◽  
Arabian Sea ◽  
Novel Species ◽  
Living Condition ◽  
Type Locality ◽  
Sultanate Of Oman ◽  
Northern Arabian Sea ◽  
Cross Links ◽  
Made In

Martensia incipiens sp. nov. is described from the Sultanate of Oman, based upon collections made in the Governate of Dhofar, Northern Arabian Sea. The type locality is Sadah. The delicate blades display a dazzling iridescence with pink to lilac colors in the living condition. The distinguishing morphological feature of this novel species is that the latticework is confined to a very narrow marginal fringe, consisting of vertical files of only six to nine cells in length and without any cross-links between the vertical files. Putative young tetrasporangial sori have a scattered arrangement over the blades.

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 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 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.

Length-weight relationships, sex ratio and growth estimates for five sympatric sillaginids (Pisces) from the northern Arabian Sea coast

2017 ◽  
Vol 33 (3) ◽  
pp. 637-639 ◽  
Author(s):  
S. K. Panhwar ◽  
N. Qamar ◽  
M. Mairaj ◽  
W. Shaikh ◽  
N. Habib ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Arabian Sea ◽  
Northern Arabian Sea ◽  
Sea Coast

scholarly journals PHOTOSYNTHETIC ACTION SPECTRA OF MARINE ALGAE

1950 ◽  
Vol 33 (4) ◽  
pp. 389-422 ◽  
Author(s):  
F. T. Haxo ◽  
L. R. Blinks
Keyword(s):  
Absorption Spectra ◽  
Green Algae ◽  
Red Algae ◽  
Marine Algae ◽  
Monochromatic Light ◽  
Action Spectrum ◽  
Water Soluble ◽  
Good Correspondence ◽  
Oxygen Determination ◽  
Action Spectra

A polarographic oxygen determination, with tissue in direct contact with a stationary platinum electrode, has been used to measure the photosynthetic response of marine algae. These were exposed to monochromatic light, of equal energy, at some 35 points through the visible spectrum (derived from a monochromator). Ulva and Monostroma (green algae) show action spectra which correspond very closely to their absorption spectra. Coilodesme (a brown alga) shows almost as good correspondence, including the spectral region absorbed by the carotenoid, fucoxanthin. In green and brown algae, light absorbed by both chlorophyll and carotenoids seems photosynthetically effective, although some inactive absorption by carotenoids is indicated. Action spectra for a wide variety of red algae, however, show marked deviations from their corresponding absorption spectra. The photosynthetic rates are high in the spectral regions absorbed by the water-soluble "phycobilin" pigments (phycoerythrin and phycocyanin), while the light absorbed by chlorophyll and carotenoids is poorly utilized for oxygen production. In red algae containing chiefly phycoerythrin, the action spectrum closely resembles that of the water-extracted pigment, with peaks corresponding to its absorption maxima (495, 540, and 565 mµ). Such algae include Delesseria, Schizymenia, and Porphyrella. In the genus Porphyra, there is a series P. nereocystis, P. naiadum, and P. perforata, with increasingly more phycocyanin and less phycoerythrin: the action spectra reflect this, with increasing activity in the orange-red region (600 to 640 mµ) where phycocyanin absorbs. In all these red algae, photosynthesis is almost minimal at 435 mµ and 675 mµ, where chlorophyll shows maximum absorption. Although the chlorophylls (and carotenoids) are present in quantities comparable to the green algae, their function is apparently not that of a primary light absorber; this role is taken over by the phycobilins. In this respect the red algae (Rhodophyta) appear unique among photosynthetic plants.

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>

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