Thematische Bibliographien / Phymatolithon

Auswahl der wissenschaftlichen Literatur zum Thema „Phymatolithon“

Autor: Grafiati

Veröffentlicht am 27. Juli 2024

Zuletzt aktualisiert am 29. Juli 2024

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Zeitschriftenartikel zum Thema "Phymatolithon"

Costa, Iara Oliveira, Paulo Antunes Horta, Ellie R. Bergstrom und José Marcos De Castro Nunes. „Taxonomic study of crustose coralline algae off the northeastern Brazilian coast“. Phytotaxa 190, Nr. 1 (24.12.2014): 130. http://dx.doi.org/10.11646/phytotaxa.190.1.10.

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This work presents a detailed morphoanatomical study of crustose coralline algae species from the northeastern Brazilian coast, in the north of Bahia state. Nine species have been recognized: Sporolithon episporum, Lithophyllum stictaeforme, Spongites yendoi, Spongites sp., Mesophyllum erubescens, Phymatolithon masonianum, Phymatolithon calcareum, Lithothamnion crispatum and Lithothamnion brasiliense. Phymatolithon masonianum and Phymatolithon calcareum constitute the first record of these species for the northern coast of Brazil. An identification key, as well as descriptions, illustrations, comparisons with related taxa, and geographical distributions for Brazil as well as global geographic distributions are presented. Additionally, some ecological implications are discussed focusing the need of more studies about this neglected group of coralline red algae.

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Pardo, Cristina, Ignacio Bárbara, Rodolfo Barreiro und Viviana Peña. „Insights into species diversity of associated crustose coralline algae (Corallinophycidae, Rhodophyta) with Atlantic European maerl beds using DNA barcoding“. Anales del Jardín Botánico de Madrid 74, Nr. 2 (20.10.2017): 059. http://dx.doi.org/10.3989/ajbm.2459.

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DNA barcoding in combination with morpho-anatomical analysis was applied to study the diversity of crustose coralline algae associated to two maerl beds from two protected Atlantic European areas from Brittany and Galicia —France and Spain, respectively—. Given the records of gametophytes of the maerl species Phymatolithon calcareum under crustose growth-forms, and that associated crustose coralline algae appear to be involved in the recruitment of new maerl plants, we compared the species composition between the associated crustose coralline algae to Breton and Galician maerl beds with the maerl species identified in these beds in previous DNA barcoding surveys. Our molecular results revealed higher species diversity in associated crustose coralline algae than in maerl-forming species. Nine taxa of crustose coralline algae were found in both study areas: four in Brittany and five in Galicia. Three species from Brittany were identified as Phymatolithon calcareum, Phymatolithon lamii, and Lithophyllum hibernicum. The remaining six ones were assigned to the genera Phymatolithon and Mesophyllum, along with Lithothamnion and Lithophyllum. Morpho-anatomical examination of diagnostic characters corroborated our molecular identification. Our results showed that the most representative genus of crustose coralline algae in Brittany was Phymatolithon, while in Galicia was Mesophyllum. In Brittany, Phymatolithon calcareum was found under both growth-forms, maerl and crustose coralline algae, the latter assigned to the gametophyte stage by the presence of uniporate conceptacles. The recruitment of new maerl plants involving associated crustose coralline algae with maerl beds may occur, but only we can affirm it for Phymatolithon calcareum in Brittany. By contrast, the different species composition between both growth-forms in the Galician maerl beds would indicate that the fragmentation of own free-living maerl species appears to be the most common propagation mechanism.

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Wilks, KM, und WJ Woelkerling. „An account of southern Australian species of Phymatolithon (Corallinaceae, Rhodophyta) with comments on Leptophytum“. Australian Systematic Botany 7, Nr. 3 (1994): 183. http://dx.doi.org/10.1071/sb9940183.

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Phymatolithon (Corallinaceae, Rhodophyta) is represented in southern Australia by two species: P. repandum, previously recorded from the region, and P. masonianum sp. nov. Detailed morphological, anatomical and taxonomic accounts are provided along with comparisons to the type species of the genus, P. calcareum. A critical evaluation of the at least 16 characters previously used to delimit species within Phymatolithon has shown that only three are useful in delimiting southern Australian species, but five new features have also been found to have value in species delimitation. Four of the above eight relate to vegetative features and four to tetra/bisporangial conceptacle features. The latter can also serve to distinguish southern Australian species from the type species. Characters recently proposed to delimit Leptophytum from Phymatolithon have been found to be unsatisfactory, and Leptophytum is reaffirmed as a genus in need of further evaluation. Southern Australian species ascribed at some stage to Leptophytum have been found to belong to Phymatolithon. A short historical introduction is also provided along with keys to southern Australian species, information on distribution, seasonality and habitat, nomenclature and synonymy and concluding remarks.

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Woelkerling, W. J., G. Furnari und M. Cormaci. „Leptophytum (Corallinaceae, Rhodophyta): To be or not to be?—That is the question, but what is the answer?“ Australian Systematic Botany 15, Nr. 5 (2002): 597. http://dx.doi.org/10.1071/sb02002.

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The question of whether or not Leptophytum (Corallinaceae, Rhodophyta) should be recognised as a distinct genus has been addressed using new data generated from type and other specimens combined with analyses of previously published data from various authors. The results have shown that none of the criteria proposed to separate Leptophytum from Phymatolithon are reliable at generic level. Some lead to the exclusion of type species from genera, others are impossible to assess because information is lacking for virtually all included species, others have character states that intergrade and thus are unsuitable and still others appear to be useful for separating species but not genera. Most of the character states proposed as diagnostic of Leptophytum are unknown or are not present in most of the species that were explicitly included in the recent proposed re-instatement of the genus and, in some cases, species included in Leptophytum show the opposing character state for Phymatolithon. No serious conflict occurs between the holotype fragments of Leptophytum laeve (the type species of Leptophytum) and the designated epitype and the designation of an epitype is fully justified because all of the characters evident in the holotype are demonstrably ambiguous and could apply to more than one species. Moreover, new evidence supports the probable conspecificity of the holotype and the designated epitype and reinforces the conclusion that Leptophytum should not be recognised as a genus distinct from Phymatolithon. Nomenclaturally, the correct authorship of the name of the type species of Leptophytum is L. laeve Adey and not L. laeve (Str�mfelt) Adey or L. laeve (Foslie in Rosenvinge) Adey, and for purposes of priority, the name Leptophytum laeve dates from 1966.

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Carro, Belén, Lua Lopez, Viviana Peña, Ignacio Bárbara und Rodolfo Barreiro. „DNA barcoding allows the accurate assessment of European maerl diversity: a Proof-of-Concept study“. Phytotaxa 190, Nr. 1 (24.12.2014): 176. http://dx.doi.org/10.11646/phytotaxa.190.1.12.

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Two non-geniculate coralline red algae (Lithothamnion corallioides and Phymatolithon calcareum) are partially protected under the assumption that they are the main components of maerl beds in Atlantic Europe. However, what we know about the composition of maerl relies mainly on morphology-based identifications that are notoriously difficult due to a lack of diagnostic features, convergence, and widespread phenotypic plasticity. Now, this state of affairs can be improved with new alternatives that, unlike morphology, allow the unambiguous partition of a large number of rhodoliths into species regardless of their size, shape, and condition (fertile or sterile). Here, we report the first DNA barcoding assessment of the relative abundance of maerl-forming algae. The plastidial gene psbA was sequenced for 1140 rhodoliths from 15 maerl beds scattered along 2000 km from the British Isles to South Portugal; rhodoliths were randomly collected along linear transects to obtain quantitative estimates of species composition. Most (97%) of our collections belonged to three, rather than two, species that often appeared intermixed along a single transect. Lithothamnion corallioides and P. calcareum dominated in the British Isles and Brittany (NW France), but they were gradually replaced by Phymatolithon sp3 in Galicia (NW Spain) and became extremely rare in Algarve (S Portugal). Morphology (rhodolith size and shape, branch diameter, habit) varied considerably between and within beds but the three species converged to a remarkably similar habit when living in sympatry. Still, P. calcareum and L. corallioides seemed to perform best in Brittany while Phymatolithon sp3 produced the largest rhodoliths with thickest branches in Algarve. Altogether, our study shows that the replacement of species of maerl seen in northern latitudes continues to the south along the coasts of Iberia. It also serves as a proof-of-concept of the benefits of DNA barcoding for ecological and biogeographic research of these taxonomically challenging taxa.

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Irvine, Linda M., und Wm J. Woelkerling. „(843) Proposal to Conserve Phymatolithon against Apora (Rhodophyta: Corallinaceae)“. Taxon 35, Nr. 4 (November 1986): 731. http://dx.doi.org/10.2307/1221631.

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Rebelo, Ana Cristina, Michael Rasser, Rafael Riosmena-Rodríguez, Ana Isabel Neto und Sérgio Ávila. „Rhodolith forming coralline algae in the Upper Miocene of Santa Maria Island (Azores, NE Atlantic): a critical evaluation“. Phytotaxa 190, Nr. 1 (24.12.2014): 370. http://dx.doi.org/10.11646/phytotaxa.190.1.22.

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The Late Miocene Malbusca outcrop is located in the southeastern coast of Santa Maria Island (Azores, NE Atlantic), interspersed in volcanic formations. At ~20 meters above present sea level, a prominent discontinuous layer of rhodoliths seizes with an extension of ~250 meters. This paper presents the first taxonomic record of fossil rhodolith forming coralline algae for the Miocene of the Azores. The preserved taxonomic features used were the following: (1) arrangement of basal filaments, (2) epithallial cells (when observable), (3) presence of cell fusions, (4) conceptacle type, (5) number of cells layers which conceptacle chamber floors are situated below the surrounding thallus surface and (6) for the sporangial pores, the orientation of the filaments around the conceptacle pores. Based on these characters, six taxa were identified encompassing three Corallinaceae (Lithophyllum prototypum, Lithophyllum sp., Spongites sp. and Hydrolithon sp.) and one Hapalidaceae (Phymatolithon calcareum and cf. Phymatolithon sp.). An unidentified coaxial thallus was also present, the coaxial construction ascribing the specimens to the genus Mesophyllum or Neogoniolithon. Taxonomic accounts for the identified taxa are described, illustrated and an identification key is provided. The report of L. prototypum represents the first Miocene record and the preservation of the specimens is very good. Miocene coralline algae seem very consistent among deposits but some species are relevant for particular areas, like in the Azores.

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Jeong, So Young, Guillermo Diaz-Pulido, Boo Yeon Won und Tae Oh Cho. „Phymatolithon atlanticum sp. nov. (Hapalidiales, Rhodophyta) from the northeast Atlantic Ocean“. Phycologia 60, Nr. 3 (24.03.2021): 200–209. http://dx.doi.org/10.1080/00318884.2021.1885197.

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Jeong, So Young, Boo Yeon Won, Kristian Hassel und Tae Oh Cho. „Revision of Phymatolithon purpureum (Hapalidiales, Rhodophyta) based on ultrastructural and molecular data“. European Journal of Phycology 54, Nr. 3 (20.05.2019): 326–41. http://dx.doi.org/10.1080/09670262.2018.1563217.

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Adey, Walter H., Jazmin J. Hernandez-Kantun, Paul W. Gabrielson, Merinda C. Nash und Lee-Ann C. Hayek. „Phymatolithon (Melobesioideae, Hapalidiales) in the Boreal–Subarctic Transition Zone of the North Atlantic“. Smithsonian Contributions to Marine Sciences, Nr. 41 (06.04.2018): 2–90. http://dx.doi.org/10.5479/si.1943-667x.41.

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Dissertationen zum Thema "Phymatolithon"

Shulika, Al'ona. „Effects of high CO2 on growth, photosynthesis and respiration of Phymatolithon calcareum“. Master's thesis, 2014. http://hdl.handle.net/10400.1/7325.

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Dissertação de mestrado, Biologia Marinha, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2014
Mäerl is a collective term for different species of non-jointed coralline red algae. Phymatolithon calcareum is a mäerl species which is widely distributed in Europe, from Norway to the Mediterranean including Portugal. In Portugal it is mostly present in the south along the coast of Algarve. This species forms highly productive marine benthic systems and is considered a priority species, protected by the European Directive 92/443/EEC - Annex V (Habitats directive). The increase of atmospheric CO2 concentration is currently leading to ocean acidification. This phenomenon is particularly worrisome for marine calcifying organism that form biogenic calcium carbonate deposits. For the present study P. calcareum was chosen as an example of calcifying species. The effect of high CO2 on the growth, photosynthesis and respiration of P. calcareum was conducted as part of a long-term mesocosm experiment. During a campaign aboard the ―Creoula‖, a search for mäerl habitats along the coast of Algarve was conducted, as a preliminary objective of this study. Three new spots were detected. The buoyant weight technique was chosen as a main method to measure growth rate. Weight increments decreased with CO2 and had a negative correlation with time. However, temperature did not had a significant effect on weight increments, neither on its own nor when combined with pCO2. At the same time, absolute growth rates were continually increasing with time and showed significant positive correlation. To investigate the effect of elevated CO2 on the photosynthesis and respiration rates of P. calcareum, light – response curves were determined in an oxygen electrode. Photosynthesis-irradiance (P-I) response curves were built up using Smiths‘ (1936) mathematical model. Photosynthesis was positively affected by elevated pCO2, while respiration increased with temperature but not with CO2.

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Bücher zum Thema "Phymatolithon"

Press, Smithsonian Institution Scholarly, Hrsg. Phymatolithon (Melobesioideae, Hapalidiales) in the Boreal--Subarctic Transition Zone of the North Atlantic: A correlation of plastid DNA markers with morpho-anatomy, ecology, and biogeography. Washington, D.C: Smithsonian Institution Scholarly Press, 2018.

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Lugilde Yáñez, Juan, Ignacio Bárbara und Viviana Peña. Algas coralinas (Corallinophycidae, Rhodophyta) de Galicia y norte de Portugal. 2022. Aufl. Servizo de Publicacións da UDC, 2022. http://dx.doi.org/10.17979/spudc.000004.

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Se muestra la diversidad de algas rojas coralinas del noroeste ibérico, mediante la integración de información de especies previamente conocidas con nuevos datos de trabajo experimental. La revisión bibliográfica y de material de herbario se combinó con la exploración del intermareal y submareal de 74 localidades en 6 provincias de Galicia y el norte de Portugal. Se seleccionaron 1300 especímenes, entre 2016 y 2020, que se procesaron mediante microscopía óptica, microscopía electrónica de barrido y análisis moleculares. Se han catalogado 46 especies de los órdenes Corallinales y Hapalidiales, que son descritas e ilustradas, aportando datos sobre morfología, reproducción, hábitat y distribución, así como una clave de identificación. Se aporta una introducción morfo-anatómica con los principales caracteres diagnóstico seleccionados para algas coralinas, además de información sobre la reproducción y hábitat de las especies en el área de estudio. Algunos géneros se han estudiado en detalle, como Jania y Phymatolithon, y se describen variaciones morfológicas para Jania longifurca, J. rubens, Phymatolithon lamii y P. lenormandii. Estudios moleculares permitieron detectar diversidad críptica en los géneros Lithophyllum, Lithothamnion, Phymatolithon y Mesophyllum. Finalmente, se plantean dudas sobre la existencia de seis especies en el noroeste ibérico (Boreolithon van-heurckii, Hydrolithon farinosum, Lithophyllum vickersiae, Leptophytum bisporum, Lithothamnion sonderi, Titanoderma cystoseirae).

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Buchteile zum Thema "Phymatolithon"

Parker, Terry, und J. McLachlan. „Relationship between cover of Chondrus crispus (Gigartinales, Rhodophyta) and Phymatolithon (Corallinales, Rhodophyta) on friable rock substrata“. In Thirteenth International Seaweed Symposium, 247–51. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2049-1_35.

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