The genus Ellisolandia (Corallinaceae, Corallinales, Rhodophyta) in the Azores (NE Atlantic): character expression and taxonomic evaluation

Couto, Ruben P.; Rosas-Alquicira, Edgar; Rodrigues, Armindo; Neto, Ana I.

doi:10.11646/phytotaxa.190.1.3

Cited by 2 publications

(3 citation statements)

References 19 publications

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“…Dominance of Corallinales is consistent with these shallow water conditions (Braga and Martıń, 1988;Braga and Aguirre, 2001; Aguirre et al, 2017). Particularly interesting is the relative abundance of geniculate coralline algae, which dominate in high-energy intertidal, shallow-subtidal settings, both in the present day (Garbary and Johansen, 1982;Canals and Ballesteros, 1997;Couto et al, 2014) and in the fossil record (Scheibner et al, 2007;Quaranta et al, 2012;Brandano, 2017). In these settings, they are prone to disarticulation and breakage after death, thus, reducing their fossilization potential (Aguirre et al, 2000a;Aguirre et al, 2010;Basso, 2012).…”

Section: Paleoenvironmental Evolutionmentioning

confidence: 61%

Coralline Algae at the Paleocene/Eocene Thermal Maximum in the Southern Pyrenees (N Spain)

2022

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During the Paleocene/Eocene Thermal Maximum, ~55.6 Ma, the Earth experienced the warmest event of the last 66 Ma due to a massive release of CO2. This event lasted for ~100 thousands of years with the consequent ocean acidification (estimated pH = 7.8-7.6). In this paper, we analyze the effects of this global environmental shift on coralline algal assemblages in the Campo and Serraduy sections, in the south-central Pyrenees (Huesca, N Spain), where the PETM is recorded within coastal-to-shallow marine carbonate and siliciclastic deposits. In both sections, coralline algae occur mostly as fragments, although rhodoliths and crusts coating other organisms are also frequent. Rhodoliths occur either dispersed or locally forming dense concentrations (rhodolith beds). Distichoplax biserialis and geniculate forms (mostly Jania nummulitica) of the order Corallinales dominated the algal assemblages followed by Sporolithales and Hapalidiales. Other representatives of Corallinales, namely Spongites, Lithoporella as well as Neogoniolithon, Karpathia, and Hydrolithon, are less abundant. Species composition does not change throughout the Paleocene/Eocene boundary but the relative abundance of coralline algae as components of the carbonate sediments underwent a reduction. They were abundant during the late Thanetian but became rare during the early Ypresian. This abundance decrease is due to a drastic change in the local paleoenvironmental conditions immediately after the boundary. A hardground at the top of the Thanetian carbonates was followed by continental sedimentation. After that, marine sedimentation resumed in shallow, very restricted lagoon and peritidal settings, where muddy carbonates rich in benthic foraminifera, e.g., milioliids (with abundant Alveolina) and soritids, and eventually stromatolites were deposited. These initial restricted conditions were unfavorable for coralline algae. Adverse conditions continued to the end of the study sections although coralline algae reappeared and were locally frequent in some beds, where they occurred associated with corals. In Serraduy, the marine reflooding was also accompanied by significant terrigenous supply, precluding algal development. Therefore, the observed changes in coralline algal assemblages during the PETM in the Pyrenees were most likely related to local paleoenvironmental shifts rather than to global oceanic or atmospheric alterations.

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Section: Paleoenvironmental Evolutionmentioning

confidence: 61%

Coralline Algae at the Paleocene/Eocene Thermal Maximum in the Southern Pyrenees (N Spain)

2022

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“…One is Corallina ellongata (syn. Corallina mediterranea or Ellisolandia elongata) from Corallinaceae family, an autotrophic marine red alga which inhabits light rocks (photopile species) in calm water and is very tolerant to pollution (opportunistic species) [9]. The second alga, Gymnogongrus crenulatus from Phyllophoraceae family, is hung on rocks generally in shallow water [9].…”

Section: Introductionmentioning

confidence: 99%

“…Corallina mediterranea or Ellisolandia elongata) from Corallinaceae family, an autotrophic marine red alga which inhabits light rocks (photopile species) in calm water and is very tolerant to pollution (opportunistic species) [9]. The second alga, Gymnogongrus crenulatus from Phyllophoraceae family, is hung on rocks generally in shallow water [9]. The third alga is Pterocladia capillacea from Pterocladiaceae family, an autotrophic red-black alga that develops in the superficial rock faults of the infralittoral stage in dark, calm, semi-slaughtered mediterranean and atlantic environments [10].…”

Section: Introductionmentioning

confidence: 99%

Efficiency Evaluation of Anti-corrosion Treatment of Carbon Steel by Extracts of Red Algae Collected from Mediterranean Coast

Khoukhi¹,

Kebbouche-Gana²,

Djelali³

et al. 2021

Rev. Chim.

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The paper presents the assessment of inhibition effectiveness of biomolecules extracted from red seaweed against biocorrosion in the petroleum industry. The first objective of this study was to obtain extracts (A, B and C, prepared respectively from red algae species: Corallina ellongata, Gymnogongrus crenulatus and Pterocladia capillacea) by ethanol extraction method. The infrared spectra of the three extracts confirmed the presence of amine derivatives molecules known by their anti-corrosion inhibiting powers. The second objective was based on the identification of physico-chemical characteristics of the extracts and thus revealing their inhibitory and / or bactericidal power in bacterial corrosion of carbon steel in injection water contaminated with sulfato-reducing bacteria. Biological test of all extracts gave a concentration upto 10 germs/mL in contaminated water by sulfato-reducing bacteria during 28 days of incubation at 37�C. Evolution in time of the open-circuit potential showed a longer incubation time for electrolyte with extracts, whereas the stabilization time was shorter. Current corrosion density, polarization resistance, charge transfer resistance and double layer capacity were determined by using linear polarizarion resistance technique and electrochemical impedance spectroscopy. The corrosion protection efficiency of extract obtained from Gymnogongrus crenulatus (extract B) reached a maximum protective capacity of 99.69% at 5 ppm in the injection water.

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The genus Ellisolandia (Corallinaceae, Corallinales, Rhodophyta) in the Azores (NE Atlantic): character expression and taxonomic evaluation

Cited by 2 publications

References 19 publications

Coralline Algae at the Paleocene/Eocene Thermal Maximum in the Southern Pyrenees (N Spain)

Coralline Algae at the Paleocene/Eocene Thermal Maximum in the Southern Pyrenees (N Spain)

Efficiency Evaluation of Anti-corrosion Treatment of Carbon Steel by Extracts of Red Algae Collected from Mediterranean Coast

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