DOCSLIB.ORG

Triphasic Life Histories :Terminology Post- Fertilization Events Distinguishing Between Orders of Florideophyceae

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Triphasic Life Histories :Terminology Post- Fertilization Events Distinguishing Between Orders of Florideophyceae Triphasic Life Histories :Terminology Post- fertilization Events Distinguishing between Orders of Florideophyceae Connecting filament or Ooblast filament = tube that carries the zygote nucleus from fertilized egg to internal auxiliary cell where it is cloned and differentiates into carpospores (in some Orders!) Auxiliary cell = vegetative cell (N) that receives the 2N zygote nucleus after fertilization (in some Orders!) cp Auxiliary cell present oo Gonimoblast = 2N filaments bearing carposporangia in the carposporophyte (ALL Auxiliary branch & carpogonial Auxiliary cell absent Florideophyceans have this) branch arise from same supporting cell Gominoblast initiated from carpogonium Auxiliary cell present Gonimoblast initiated from a fused carpogonium Ooblast filament transfers & auxiliary cell zygote nucleus to auxiliary cell Gonimoblast initiated from auxiliary cell Division: Rhodophyta- 7117 species 3.Class: Florideophyceae Auxiliary cell absent 3.Class: Florideophyceae-6767 species 1.Order Nemaliales Gominoblasts initiated from carpogonium Pit plugs characterized by 2 cap layers Order: 29 orders but we will focus on 5 2N carpospores 1. Nemaliales -273 species Spermatium on gonimoblast 2. Rhodomeniales-382 species filaments 3. Ceramiales- 2662 species Tricogyne 4. Gigartinales- 880 species Carpogonium 5. Corallinales- 725 species Carpogonial branch 1N female gametophyte 2N carposporophyte on 14 1N female gametophyte 1 3.Class: Florideophyceae 3.Class: Florideophyceae 2. Order Rhodomeniales Auxiliary cell formed before fertilization 1.Order Nemaliales Auxiliary branch & carpogonial branch arise Genus: Cumagloia from same supporting cell Gominoblast initiated from a fused carpogonium & auxiliary cell - cylindrical with branchlets -multiaxial Spermatium - saxicolous 2N carpospores - intertidal Carpogonium on goniblimoblast filaments Carpogonial branch S A S Auxiliary Cell Supporting Cell 2N carposporophyte on 1N female gametophyte 1N female gametophyte 3.Class: Florideophyceae 3.Class: Florideophyceae 2. OrderRhodomeniales 2. Order Rhodomeniales Genus: Rhodomenia Genus: Botryocladia -Subtidal, saxicolous - Mucus-filled sacs -Multiaxial - “sea grapes” -Subtidal, saxicolous - Associated with juvenile fish - Dichotomous branching -Multiaxial 2 3. Class: Florideophyceae 3.Class: Florideophyceae 3. Order: Ceramiales Auxiliary cell develops from supporting cell of 3. Order Ceramiales Genus: Ceramium carpogonial branch after fertilization Genus Polysiphonia Ooblast filament forms between carpogonium & auxiliary cell Gominoblast initiated from axiliary cell Spermatium After Tricogyne fertilization Carpogonium Carpogonial Branch - Prominent trichoblasts S S A S A which leave scars after they fall off. Ooblast filament - Number of pericentral Supporting cell trasfers 2N carpospores cells helps to identify to zygote nucleus on gonimoblast filaments species 1N female gametophyte 2N carposporophyte on 1N female gametophyte -Polysiphonous 3. Class: Florideophyceae 3.Class: florideophyceae 3. Order: Ceramiales 3. Order Ceramiales Genus: Ceramium Genus Microcladia - saxicolous or epiphytic - fully corticated -distichous -uniaxial - saxicolous or ephiphytic alternate - fully or partially corticated -uniaxial pectinate 3 3.Class: Florideophyceae 3.Class: Florideophyceae 4. Order Gigartinales 4. Order Gigartinales Genus Mazzaella Auxiliary cell present BEFORE fertilization but on a distant branch Ooblast filament transfers zygote nucleus to auxiliary cell Gominoblast initiated from auxiliary cell Common local species: •M. flaccida – yellow/green; mid to upper intertidal •M. splendens – red/purple; low intertidal Spermatium Iridescence • Proteinaceous cuticle • Multiple layers Ooblast filament • Alternating opaque and translucent layers trasfers • Layering produces light interference zygote nucleus patterns that give iridescent appearance when submerged Supporting A A • Adaptive advantage unknown Cell 2N carpospores Auxiliary on Cell gonimoblast filaments 2N carposporophyte on 1N female gametophyte 1N female gametophyte 3.Class: Florideophyceae 3.Class: Florideophyceae 4. Order Gigartinales 4. Order Gigartinales Genus Mazzaella Genus Mastocarpus species complex 2N carposporophytes on female gametophyte 1N gametophytes -multiaxial - filamentous medulla 2N tetrasporophyte Gametophyte Carposporophyte Tetrasporophyte 4 3. Class: Florideophyceae 3.Class: Florideophyceae 4. Order: Gigartinales 4. Order Gigartinales Genus: Constantinea Genus Endocladia -uniaxial - thallus covered with bumps (antiherbivory) - very high intertidal - saxicolous - cup and - can facilitate recruitment saucer algae of other algae (Fucoids) - intertidal to subtidal Other spp in Gigartinales are important for carageenan production 3. Class: Florideophyceae 3. Class: Florideophyceae 5. Order: Corallinales 5. Order: Corallinales • Isomorphic alternation of generations • Reproductive structures in conceptacles • Fossils from 500 million years ago • Cell walls impregnated with CaCO3 • A crustose coralline alga in AK is (i(anti-hbiherbivory) ~700 years old – oldest alga known • More calcified red algae than any on earth?!! other algae • Ecological importance: stabilize reefs, induce invert settlement • Especially sensitive to desiccation – occur IN tidepools (not nearby surfaces) 5 How do coralline algae become calcified? Coralline Algae and Global Warming What is known: Carbon reaction in seawater: • Sequestering of Calcium ions from the water column, synthesis 2 of calcium carbonate (CaC03) into cell wall CO2 + H20 H2C03 HCO3 + H+ CO3 + H+ • Synthesis of calcium carbonate (precipitation) requires high Carbonic acid Bicarbonate Carbonate pH (basic/alkaline) •Higgfpyh rates of photosynthesis correlate with hig gfh rates of more acidicIncreasing CO2 more basic pushes RXN in this calcification direction • Photosynthesis may raise the pH immediately outside cells • Calcification is 10x faster in the light than the dark • Global warming likely to lead to a lower in pH (raise in acidity of the world’s oceans • Highest in young tissue (growth at apices and intergenicula) • Acidic environment is bad for calcification process big (complicated) trouble for calcified critters and algae!! • Lots of current research on this 3. Class: Florideophyceae Geniculate corallines 5. Order: Corallinales Geniculum Supporting cell acts as an auxiliary cell (flexible joint) Carpogonial branches located in conceptacles •upright Gominoblast initiated from a fusion of cells in carpogonial branch •articulated Intergeniculum (hard part between genicula) 2N carpospores on gonimoblast Spermatium filaments Supporting Non-geniculate corallines Cell Crustose or Unattached Encrusting Branching Carpogonial Branch Tricogyne Carpogonium 2N carposporophyte on 1N female gametophyte 1N female gametophyte 6 3. Class: Florideophyceae 3. Class: Florideophyceae 5. Order: Corallinales 5. Order: Corallinales Genus Bossiella Genera Corallina - Common intertidaly - Intergenicula - Common intertidally typically “heart- -Conceppptacles on tips shaped” -Finely branched, more so than Bossiella or - Conceptacles in pairs Calliarthron on the face of a - Intergenicula are thin segment, not margins and tubular and smaller than those on Bossiella - Intergenicula are or Calliarthron larger than Corallina 3.Class: florideophyceae-6767 species 3. Class: Florideophyceae 5. Order Corallinales- 725 species 5. Order: Corallinales Genus Caliarthron Genus Lithothamnion •rhodolith •unattached -Common intertidally • free-living • non- geniculate form -Inngnuypytergenicula typically • biogenic habitat for lots of inverts! “wingnut-shaped” - Conceptacles mainly on margins of segments - Calcareous sections are larger than Corallina 7 Distributional Limits World Rhodolith Distribution •Depth -light limited in deep, dessicated in shallows •Water motion-need intermediate amount of hydraulic energy •Sedimentation -smothered by fine sediments DISTURBANCE low high Rhodolith Beds New Report Foster 2001 buried by ‘intact’ ‘reduced’ sand siltation rhodolith size, cover bed Biogenic Ecosystems – Foundation Species Rhodolith beds, reefs that rock and roll Kelp Forests Coral Reefs Seagrass Meadows Rhodolith Beds 8 What are other important features of rhodolith beds? Rhodolith Bed Community Form complex habitat for a Cryptofauna/Infauna Epifauna/Epiflora variety of orgamisms Cover extensive ares of • hard bottom species the seafloor, globally • soft bottom species distributed Seasonal Macroalgal Species Halymenia hollenbergii Scinaia confusa Sporochnus bolleanus Kallymenia pertursa 9 Growth Rate Internal Banding L. muellerii 0.6 mm/yr L. margaritae 5.6 mm/yr S. trichotomum 7-8 mm/yr New Catalina rhodoliths growth 1.6 mm/yr Coralline algae as global palaeothermometers Baja California Banding reflects sea surface temperature signal using SrCO3 and MCOMgCO3 They are found in Pleistocene and Pleiocene fossil deposits Lithothamnion glaciale Kamenos et al. 2008 10 Post-fertilization in a nutshell auxiliary cell? Yes No Nemaliales – Gonimoblasts from carpegonium Before After Corallinales – Ceramiales – Fusion of Ooblast? (has ooblast) Yes. Gigartinales – carpegonium with Auxiliary cell is anywhere carpegonial in thallus branch * Supporting cell acts No. Rhodymeniales – as auxiliary cell Fusion with carpegonium 11.
Load more

Recommended publications
  • The Red Alga Polysiphonia (Rhodomelaceae) in the Northern Gulf of California
    The Red Alga Polysiphonia (Rhodomelaceae) in the Northern Gulf of California GEORGE J. HOLLENBERG ' • ,. • •a and JAMES N. NORRIS SMITHSONIAN CONTRIBUTIONS TO THE MARINE SCIENCES SERIES PUBLICATIONS OF THE SMITHSONIAN INSTITUTION Emphasis upon publication as a means of "diffusing knowledge" was expressed by the first Secretary of the Smithsonian. In his formal plan for the Institution, Joseph Henry outlined a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge." This theme of basic research has been adhered to through the years by thousands of titles issued in series publications under the Smithsonian imprint, commencing with Smithsonian Contributions to Knowledge in 1848 and continuing with the following active series: Smithsonian Contributions to Anthropology Smithsonian Contributions to Astrophysics Smithsonian Contributions to Botany Smithsonian Contributions to the Earth Sciences Smithsonian Contributions to the Marine Sciences Smithsonian Contributions to Paleobiology Smithsonian Contributions to Zoology Smithsonian Studies in Air and Space Smithsonian Studies in History and Technology In these series, the Institution publishes small papers and full-scale monographs that report the research and collections of its various museums and bureaux or of professional colleagues in the world cf science and scholarship. The publications are distributed by mailing lists to libraries, universities, and similar institutions throughout the world. Papers or monographs submitted for series publication are received by the Smithsonian Institution Press, subject to its own review for format and style, only through departments of the various Smithsonian museums or bureaux, where the manuscripts are given substantive review.
    [Show full text]
  • RED ALGAE · RHODOPHYTA Rhodophyta Are Cosmopolitan, Found from the Artic to the Tropics
    RED ALGAE · RHODOPHYTA Rhodophyta are cosmopolitan, found from the artic to the tropics. Although they grow in both marine and fresh water, 98% of the 6,500 species of red algae are marine. Most of these species occur in the tropics and sub-tropics, though the greatest number of species is temperate. Along the California coast, the species of red algae far outnumber the species of green and brown algae. In temperate regions such as California, red algae are common in the intertidal zone. In the tropics, however, they are mostly subtidal, growing as epiphytes on seagrasses, within the crevices of rock and coral reefs, or occasionally on dead coral or sand. In some tropical waters, red algae can be found as deep as 200 meters. Because of their unique accessory pigments (phycobiliproteins), the red algae are able to harvest the blue light that reaches deeper waters. Red algae are important economically in many parts of the world. For example, in Japan, the cultivation of Pyropia is a multibillion-dollar industry, used for nori and other algal products. Rhodophyta also provide valuable “gums” or colloidal agents for industrial and food applications. Two extremely important phycocolloids are agar (and the derivative agarose) and carrageenan. The Rhodophyta are the only algae which have “pit plugs” between cells in multicellular thalli. Though their true function is debated, pit plugs are thought to provide stability to the thallus. Also, the red algae are unique in that they have no flagellated stages, which enhance reproduction in other algae. Instead, red algae has a complex life cycle, with three distinct stages.
    [Show full text]
  • Thallus Structure of Polysiphonia • the Thallus Is Filamentous, Red Or Purple Red in Colour
    Algae: Ectocarpus Dr. Animesh Mondal Dept. of Botany B B College, Asansol-03 Ectocarpus Fritsch (1945) Class-Phaeophyceae; Order-Ectocarpales; Family- Ectocarpaceae; Genus – Ectocarpus Lee (1999) Phylum-Phaeophyta; Class-Phaeophyceae; Order- Ectocarpales; Family- Ectocarpaceae; Genus - Ectocarpus Occurrence • Ectocarpus is a brown alga. It is abundantly found throughout the world in cold waters. A few species occur in fresh waters. The plant grows attached to rocks and stones along coasts. Some species are epiphytes on other algae like members of Fucales and Laminaria. Ectocarpus fasciculatus grows on the fins of certain fish (epizoic) in Sweden. Ectecarpus dermonemcnis is endophytic. Ectocarpus carver and Ectocarpus spongiosus are free- floating. Indian spp. E. filife E. enhali E. coniger E. rhodochortonoides Plant Body • Genetically the thalli may be haploid or diploid. But both the types are morphologically alike. The thallus consists of profusely branched uniseriate filaments. It shows heterotrichous habit. There are two systems of filaments. These are prostrate and projecting system. The filaments of the projecting system arise from the filaments of prostrate system • a) Prostate system: The prostrate system consists of creeping, leptate, irregularly branched filaments. These filaments are attached to the substratum with the help of rhizoids. This system enters the host tissues in epiphytic conditions. Prostrate system is poorly developed in free floating species. • b) Projecting system: The projecting system arises from the prostrate system. It consists of well branched filaments. Each branch arises beneath the septa. The main axis and the branches of the projecting system are uniseriate. In this case, rans are Joined end to end in a single series.
    [Show full text]
  • Skye: a Landscape Fashioned by Geology
    SCOTTISH NATURAL SKYE HERITAGE A LANDSCAPE FASHIONED BY GEOLOGY SKYE A LANDSCAPE FASHIONED BY GEOLOGY SCOTTISH NATURAL HERITAGE Scottish Natural Heritage 2006 ISBN 1 85397 026 3 A CIP record is held at the British Library Acknowledgements Authors: David Stephenson, Jon Merritt, BGS Series editor: Alan McKirdy, SNH. Photography BGS 7, 8 bottom, 10 top left, 10 bottom right, 15 right, 17 top right,19 bottom right, C.H. Emeleus 12 bottom, L. Gill/SNH 4, 6 bottom, 11 bottom, 12 top left, 18, J.G. Hudson 9 top left, 9 top right, back cover P&A Macdonald 12 top right, A.A. McMillan 14 middle, 15 left, 19 bottom left, J.W.Merritt 6 top, 11 top, 16, 17 top left, 17 bottom, 17 middle, 19 top, S. Robertson 8 top, I. Sarjeant 9 bottom, D.Stephenson front cover, 5, 14 top, 14 bottom. Photographs by Photographic Unit, BGS Edinburgh may be purchased from Murchison House. Diagrams and other information on glacial and post-glacial features are reproduced from published work by C.K. Ballantyne (p18), D.I. Benn (p16), J.J. Lowe and M.J.C. Walker. Further copies of this booklet and other publications can be obtained from: The Publications Section, Cover image: Scottish Natural Heritage, Pinnacle Ridge, Sgurr Nan Gillean, Cullin; gabbro carved by glaciers. Battleby, Redgorton, Perth PH1 3EW Back page image: Tel: 01783 444177 Fax: 01783 827411 Cannonball concretions in Mid Jurassic age sandstone, Valtos. SKYE A Landscape Fashioned by Geology by David Stephenson and Jon Merritt Trotternish from the south; trap landscape due to lavas dipping gently to the west Contents 1.
    [Show full text]
  • Calcification of the Arctic Coralline Red Algae Lithothamnion Glaciale in Response to Elevated CO2
    Vol. 441: 79–87, 2011 MARINE ECOLOGY PROGRESS SERIES Published November 15 doi: 10.3354/meps09405 Mar Ecol Prog Ser OPENPEN ACCESSCCESS Calcification of the Arctic coralline red algae Lithothamnion glaciale in response to elevated CO2 Jan Büdenbender*, Ulf Riebesell, Armin Form Leibniz Institute of Marine Sciences (IFM-GEOMAR), University of Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany ABSTRACT: Rising atmospheric CO2 concentrations could cause a calcium carbonate subsatura- tion of Arctic surface waters in the next 20 yr, making these waters corrosive for calcareous organ- isms. It is presently unknown what effects this will have on Arctic calcifying organisms and the ecosystems of which they are integral components. So far, acidification effects on crustose coralline red algae (CCA) have only been studied in tropical and Mediterranean species. In this work, we investigated calcification rates of the CCA Lithothamnion glaciale collected in northwest Svalbard in laboratory experiments under future atmospheric CO2 concentrations. The algae were exposed to simulated Arctic summer and winter light conditions in 2 separate experiments at opti- mum growth temperatures. We found a significant negative effect of increased CO2 levels on the net calcification rates of L. glaciale in both experiments. Annual mean net dissolution of L. glaciale was estimated to start at an aragonite saturation state between 1.1 and 0.9 which is projected to occur in parts of the Arctic surface ocean between 2030 and 2050 if emissions follow ‘business as usual’ scenarios (SRES A2; IPCC 2007). The massive skeleton of CCA, which consist of more than 80% calcium carbonate, is considered crucial to withstanding natural stresses such as water move- ment, overgrowth or grazing.
    [Show full text]
  • Aragonite Infill in Overgrown Conceptacles of Coralline Lithothamnion Spp
    J. Phycol. 52, 161–173 (2016) © 2016 Phycological Society of America DOI: 10.1111/jpy.12392 ARAGONITE INFILL IN OVERGROWN CONCEPTACLES OF CORALLINE LITHOTHAMNION SPP. (HAPALIDIACEAE, HAPALIDIALES, RHODOPHYTA): NEW INSIGHTS IN BIOMINERALIZATION AND PHYLOMINERALOGY1 Sherry Krayesky-Self,2 Joseph L. Richards University of Louisiana at Lafayette, Lafayette, Louisiana 70504-3602, USA Mansour Rahmatian Core Mineralogy Inc., Lafayette, Louisiana 70506, USA and Suzanne Fredericq University of Louisiana at Lafayette, Lafayette, Louisiana 70504-3602, USA New empirical and quantitative data in the study of calcium carbonate biomineralization and an All crustose coralline algae belonging in the Coral- expanded coralline psbA framework for linales, Hapalidiales, and Sporolithales (Rhodo- phylomineralogy are provided for crustose coralline phyta) are characterized by the presence of calcium red algae. Scanning electron microscopy (SEM) and carbonate in their cell walls, which is often in the energy dispersive spectrometry (SEM-EDS) form of highly soluble high-magnesium-calcite (Adey pinpointed the exact location of calcium carbonate 1998, Knoll et al. 2012, Adey et al. 2013, Diaz-Pulido crystals within overgrown reproductive conceptacles et al. 2014, Nelson et al. 2015). Besides the in rhodolith-forming Lithothamnion species from the Rhodogorgonales (Fredericq and Norris 1995), a sis- Gulf of Mexico and Pacific Panama. SEM-EDS and ter group of the coralline algae in the Corallinophy- X-ray diffraction (XRD) analysis confirmed the cidae (Le Gall and Saunders 2007) whose members elemental composition of these calcium carbonate also precipitate calcite, all other calcified red and crystals to be aragonite. After spore release, green macroalgae deposit calcium carbonate in the reproductive conceptacles apparently became form of aragonite (reviewed in Adey 1998, Nelson overgrown by new vegetative growth, a strategy that 2009).
    [Show full text]
  • Dorset and East Devon Coast for Inclusion in the World Heritage List
    Nomination of the Dorset and East Devon Coast for inclusion in the World Heritage List © Dorset County Council 2000 Dorset County Council, Devon County Council and the Dorset Coast Forum June 2000 Published by Dorset County Council on behalf of Dorset County Council, Devon County Council and the Dorset Coast Forum. Publication of this nomination has been supported by English Nature and the Countryside Agency, and has been advised by the Joint Nature Conservation Committee and the British Geological Survey. Maps reproduced from Ordnance Survey maps with the permission of the Controller of HMSO. © Crown Copyright. All rights reserved. Licence Number: LA 076 570. Maps and diagrams reproduced/derived from British Geological Survey material with the permission of the British Geological Survey. © NERC. All rights reserved. Permit Number: IPR/4-2. Design and production by Sillson Communications +44 (0)1929 552233. Cover: Duria antiquior (A more ancient Dorset) by Henry De la Beche, c. 1830. The first published reconstruction of a past environment, based on the Lower Jurassic rocks and fossils of the Dorset and East Devon Coast. © Dorset County Council 2000 In April 1999 the Government announced that the Dorset and East Devon Coast would be one of the twenty-five cultural and natural sites to be included on the United Kingdom’s new Tentative List of sites for future nomination for World Heritage status. Eighteen sites from the United Kingdom and its Overseas Territories have already been inscribed on the World Heritage List, although only two other natural sites within the UK, St Kilda and the Giant’s Causeway, have been granted this status to date.
    [Show full text]
  • 2015 Clathromorphum.Pdf
    J. Phycol. 51, 189–203 (2015) © 2014 Phycological Society of America DOI: 10.1111/jpy.12266 DNA SEQUENCING, ANATOMY, AND CALCIFICATION PATTERNS SUPPORT A MONOPHYLETIC, SUBARCTIC, CARBONATE REEF-FORMING CLATHROMORPHUM (HAPALIDIACEAE, CORALLINALES, RHODOPHYTA) Walter H. Adey,2 Jazmin J. Hernandez-Kantun Botany Department, National Museum of Natural History, Smithsonian Institution, Washington, D.C., USA Gabriel Johnson Laboratory of Analytical Biology, National Museum of Natural History, Smithsonian Institution, Washington, D.C., USA and Paul W. Gabrielson Department of Biology and Herbarium, University of North Carolina, Chapel Hill, North Carolina, USA For the first time, morpho-anatomical characters under each currently recognized species of that were congruent with DNA sequence data were Clathromorphum and Neopolyporolithon. used to characterize several genera in Hapalidiaceae Key index words: anatomy; Callilithophytum; ecology; — the major eco-engineers of Subarctic carbonate evolution; Leptophytum; Melobesioideae; Neopolypor- ecosystems. DNA sequencing of three genes (SSU, olithon; psbA; rbcL; SSU rbcL, ribulose-1, 5-bisphosphate carboxylase/ oxygenase large subunit gene and psbA, photosystem Abbreviations: BI, Bayesian inference; BP, bootstrap II D1 protein gene), along with patterns of cell value; GTR, general time reversible; MCMC, Mar- division, cell elongation, and calcification supported kov Chain Monte Carlo; ML, maximum likelihood; a monophyletic Clathromorphum. Two characters psbA, Photosystem II D1 protein gene; rbcL, ribu- were diagnostic for this genus: (i) cell division, lose-15-bisphosphate carboxylase/oxygenase large elongation, and primary calcification occurred only subunit gene in intercalary meristematic cells and in a narrow vertical band (1–2 lm wide) resulting in a “meristem split” and (ii) a secondary calcification of interfilament crystals was also produced.
    [Show full text]
  • Algologielgologie 2020 ● 41 ● 8 DIRECTEUR DE LA PUBLICATION / PUBLICATION DIRECTOR : Bruno DAVID Président Du Muséum National D’Histoire Naturelle
    cryptogamie AAlgologielgologie 2020 ● 41 ● 8 DIRECTEUR DE LA PUBLICATION / PUBLICATION DIRECTOR : Bruno DAVID Président du Muséum national d’Histoire naturelle RÉDACTRICE EN CHEF / EDITOR-IN-CHIEF : Line LE GALL Muséum national d’Histoire naturelle ASSISTANTE DE RÉDACTION / ASSISTANT EDITOR : Audrina NEVEU ([email protected]) MISE EN PAGE / PAGE LAYOUT : Audrina NEVEU RÉDACTEURS ASSOCIÉS / ASSOCIATE EDITORS Ecoevolutionary dynamics of algae in a changing world Stacy KRUEGER-HADFIELD Department of Biology, University of Alabama, 1300 University Blvd, Birmingham, AL 35294 (United States) Jana KULICHOVA Department of Botany, Charles University, Prague (Czech Repubwlic) Cecilia TOTTI Dipartimento di Scienze della Vita e dell’Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona (Italy) Phylogenetic systematics, species delimitation & genetics of speciation Sylvain FAUGERON UMI3614 Evolutionary Biology and Ecology of Algae, Departamento de Ecología, Facultad de Ciencias Biologicas, Pontifi cia Universidad Catolica de Chile, Av. Bernardo O’Higgins 340, Santiago (Chile) Marie-Laure GUILLEMIN Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia (Chile) Diana SARNO Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli (Italy) Comparative evolutionary genomics of algae Nicolas BLOUIN Department of Molecular Biology, University of Wyoming, Dept. 3944, 1000 E University Ave, Laramie, WY 82071 (United States) Heroen VERBRUGGEN School of BioSciences,
    [Show full text]
  • Rhodomelaceae, Rhodophyta) Based on Molecular Analyses and Morphological Observations of Specimens from the Type Locality in Western Australia
    Phytotaxa 324 (1): 051–062 ISSN 1179-3155 (print edition) http://www.mapress.com/j/pt/ PHYTOTAXA Copyright © 2017 Magnolia Press Article ISSN 1179-3163 (online edition) https://doi.org/10.11646/phytotaxa.324.1.3 The phylogenetic position of Polysiphonia scopulorum (Rhodomelaceae, Rhodophyta) based on molecular analyses and morphological observations of specimens from the type locality in Western Australia JOHN M. HUISMAN1, BYEONGSEOK KIM2 & MYUNG SOOK KIM2* 1Western Australian Herbarium, Department of Biodiversity, Conservation and Attractions, Locked Bag 104, Bentley Delivery Centre, Western Australia 6983, Australia; and School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia 6150, Australia 2Department of Biology, Jeju National University, Jeju 63243, Korea *Author for correspondence. Email: [email protected] Abstract Considerable uncertainty surrounds the phylogenetic position of Polysiphonia scopulorum, a species with an apparently cos- mopolitan distribution. Here we report, for the first time, molecular phylogenetic analyses using plastid rbcL gene sequences and morphological observations of P. scopulorum collected from the type locality, Rottnest Island in Western Australia. Mor- phological characteristics of the Rottnest Island specimens allowed unequivocal identification, however, the sequence analy- ses uncovered discrepancies in previous molecular studies that included specimens identified as P. scopulorum from other locations. The phylogenetic evidence clearly revealed that P. scopulorum from Rottnest Island formed a sister clade with P. caespitosa from Spain (JX828149 as P. scopulorum) with moderate support, but that it differed from specimens identified as P. scopulorum from the U.S.A. (AY396039, EU492915). In light of this, we suggest that P. scopulorum be considered an endemic species with a distribution restricted to Australia.
    [Show full text]
  • Geologia Croaticacroatica
    View metadata, citationGeologia and similar Croatica papers at core.ac.uk 61/2–3 333–340 1 Fig. 1 Pl. Zagreb 2008 333brought to you by CORE The coralline fl ora of a Miocene maërl: the Croatian “Litavac” Daniela Basso1, Davor Vrsaljko2 and Tonći Grgasović3 1 Dipartamento di Scienze Geologiche e Geotecnologie, Università degli Studi di Milano – Bicocca, Piazza della Scienza 4, 20126 Milano, Italy; ([email protected]) 2 Croatian Natural History Museum, Demetrova 1, HR-10000 Zagreb, Croatia; ([email protected]) 3 Croatian Geological Survey, Sachsova 2, HR-10000 Zagreb, Croatia; ([email protected]) GeologiaGeologia CroaticaCroatica AB STRA CT The fossil coralline fl ora of the Badenian bioclastic limestone outcropping in Northern Croatia is known by the name “Litavac”, shortened from “Lithothamnium Limestone”. The name was given to indicate that unidentifi ed coralline algae are the major component. In this fi rst contribution to the knowledge of the coralline fl ora of the Litavac, Lithoth- amnion valens seems to be the most common species, with an unattached, branched growth-form. Small rhodoliths composed of Phymatolithon calcareum and Mesophyllum roveretoi also occur. The Badenian benthic association is dominated by melobesioid corallines, thus it can be compared with the modern maërl facies of the Atlantic Ocean and Mediterranean Sea. Since L. valens still survives in the present-day Mediterranean, an analogy between the Badenian Litavac and the living L. valens facies of the Mediterranean is suggested. Keywor ds: calcareous Rhodophyta, Corallinales, rhodoliths, maërl, Badenian, Croatia 1. INTRODUCTION an overlying facies of fi ne-graded clastics: fi ne-graded sands, marls, clayey limestones and calcsiltites (VRSALJKO et al., Since Roman times, a building stone named “Litavac” has 2006, 2007a).
    [Show full text]
  • Some Considerations for Analyzing Biodiversity Using Integrative
    Some considerations for analyzing biodiversity using integrative metagenomics and gene networks Lucie Bittner, Sébastien Halary, Claude Payri, Corinne Cruaud, Bruno de Reviers, Philippe Lopez, Eric Bapteste To cite this version: Lucie Bittner, Sébastien Halary, Claude Payri, Corinne Cruaud, Bruno de Reviers, et al.. Some considerations for analyzing biodiversity using integrative metagenomics and gene networks. Biology Direct, BioMed Central, 2010, 5 (5), pp.47. 10.1186/1745-6150-5-47. hal-02922363 HAL Id: hal-02922363 https://hal.archives-ouvertes.fr/hal-02922363 Submitted on 26 Aug 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Bittner et al. Biology Direct 2010, 5:47 http://www.biology-direct.com/content/5/1/47 HYPOTHESIS Open Access Some considerations for analyzing biodiversity using integrative metagenomics and gene networks Lucie Bittner1†, Sébastien Halary2†, Claude Payri3, Corinne Cruaud4, Bruno de Reviers1, Philippe Lopez2, Eric Bapteste2* Abstract Background: Improving knowledge of biodiversity will benefit conservation biology, enhance bioremediation studies, and could lead to new medical treatments. However there is no standard approach to estimate and to compare the diversity of different environments, or to study its past, and possibly, future evolution.
    [Show full text]