DOCSLIB.ORG

Phylogeography of Two Intertidal Seaweeds, Gelidium Lingulatum and G

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Phylogeography of Two Intertidal Seaweeds, Gelidium Lingulatum and G See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/318920887 Phylogeography of two intertidal seaweeds, Gelidium lingulatum and G. rex (Rhodophyta: Gelidiales), along the... Article in Marine Biology · September 2017 DOI: 10.1007/s00227-017-3219-5 CITATIONS READS 0 124 8 authors, including: Boris A López Florence Tellier Universidad de Los Lagos Universidad Catolica de la Santisima Concep… 31 PUBLICATIONS 149 CITATIONS 129 PUBLICATIONS 316 CITATIONS SEE PROFILE SEE PROFILE Erasmo C Macaya Fadia Tala University of Concepción Universidad Católica del Norte (Chile) 77 PUBLICATIONS 649 CITATIONS 50 PUBLICATIONS 587 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Trait-Based structure of reef fishes: towards an understanding of assembly rules across biogeographic scales View project Analysis of Life-History Traits in a Sex-Changing Marine Shrimp (Decapoda: Caridea: Rhynchocinetidae) View project All content following this page was uploaded by Boris A López on 22 August 2017. The user has requested enhancement of the downloaded file. Mar Biol (2017) 164:188 DOI 10.1007/s00227-017-3219-5 ORIGINAL PAPER Phylogeography of two intertidal seaweeds, Gelidium lingulatum and G. rex (Rhodophyta: Gelidiales), along the South East Pacifc: patterns explained by rafting dispersal? Boris A. López1,2 · Florence Tellier3,4 · Juan C. Retamal‑Alarcón3 · Karla Pérez‑Araneda3,4 · Ariel O. Fierro3 · Erasmo C. Macaya5,6,7 · Fadia Tala8,9 · Martin Thiel6,8,10 Received: 31 October 2016 / Accepted: 4 August 2017 © Springer-Verlag GmbH Germany 2017 Abstract Rafting on foating seaweeds facilitates disper- respectively) were characterized using a mitochondrial sal of associated organisms, but there is little information marker (COI) and, for a subset, using a chloroplastic marker on how rafting afects the genetic structure of epiphytic (rbcL). Gelidium lingulatum had higher genetic diversity, seaweeds. Previous studies indicate a high presence of sea- but its genetic structure did not follow a clear geographic weeds from the genus Gelidium attached to foating bull kelp pattern, while G. rex had less genetic diversity with a shal- Durvillaea antarctica (Chamisso) Hariot. Herein, we ana- low genetic structure and a phylogeographic break coincid- lyzed the phylogeographic patterns of Gelidium lingulatum ing with the phylogeographic discontinuity described for (Kützing 1868) and G. rex (Santelices and Abbott 1985), this region (29°S–33°S). In G. lingulatum, no isolation- species that are partially co-distributed along the Chilean by-distance was observed, in contrast to G. rex. The phy- coast (28°S–42°S). A total of 319 individuals from G. lin- logeographic pattern of G. lingulatum could be explained gulatum and 179 from G. rex (20 and 11 benthic localities, mainly by rafting dispersal as an epiphyte of D. antarctica, although other mechanisms cannot be completely ruled out (e.g., human-mediated dispersal). The contrasting pattern Responsibile Editor: O. Puebla. observed in G. rex could be attributed to other factors such as intertidal distribution (i.e., G. rex occurs in the lower Reviewed by Undisclosed experts. zone compared to G. lingulatum) or diferential efciency of recruitment after long-distance dispersal. This study indi- Electronic supplementary material The online version of this article (doi:10.1007/s00227-017-3219-5) contains supplementary cates that rafting dispersal, in conjunction with the intertidal material, which is available to authorized users. 6 * Florence Tellier Millennium Nucleus Ecology and Sustainable Management [email protected] of Oceanic Island (ESMOI), Coquimbo, Chile 7 1 Centro FONDAP de Investigaciones en Dinámica de Doctorado en Biología y Ecología Aplicada, Universidad Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Católica del Norte, Coquimbo, Chile Chile 2 Departamento de Acuicultura y Recursos Agroalimentarios, 8 Departamento de Biología Marina, Facultad de Ciencias del Universidad de Los Lagos, Osorno, Chile Mar, Universidad Católica del Norte, Coquimbo, Chile 3 Departamento de Ecología, Facultad de Ciencias, 9 Centro de Investigación y Desarrollo Tecnológico en Algas Universidad Católica de la Santísima Concepción, (CIDTA), Universidad Católica del Norte, Coquimbo, Chile Concepción, Chile 10 4 Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Centro de Investigación en Biodiversidad y Ambientes Coquimbo, Chile Sustentables (CIBAS), Universidad Católica de la Santísima Concepción, Concepción, Chile 5 Laboratorio de Estudios Algales ALGALAB, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográfcas, Universidad de Concepción, Concepción, Chile Vol.:(0123456789)1 3 188 Page 2 of 19 Mar Biol (2017) 164:188 distribution, can modulate the phylogeographic patterns of of foating species, but also of their epibiont communities seaweeds. (Thiel and Haye 2006). Only a few studies have evaluated the efects of rafting on the genetic diversity and structure of epibionts (also called Introduction secondary rafters), focusing mostly on animals associated with foating kelps (see Nikula et al. 2010, 2011a, b, 2013; The dispersal ability of marine species is a major trait deter- Cumming et al. 2014). In their recent review of phylogeo- mining the genetic structure of their benthic populations graphic studies on non-buoyant seaweeds associated with (Weersing and Toonen 2009; Selkoe and Toonen 2011; Haye foating substrata, Macaya et al. (2016) have shown that most et al. 2014). In general, species with high dispersal ability of these epibionts present low genetic structure and high (i.e., presence of planktonic larvae, swimming or crawling genetic connectivity among populations. Nevertheless, in structures in adults) tend to have lower genetic structure due most cases the authors of the genetic studies only suggested to higher gene fow between geographically distant popula- this connectivity via rafting of foating seaweeds and could tions compared to species with direct development (absence not completely exclude other vectors of dispersal (e.g., foat- of larvae) or low mobility (e.g., Dawson et al. 2014; Haye ing marine litter, see Kiessling et al. 2015). et al. 2014). However, other factors such as oceanographic, A good choice to study the phylogeography of epibionts geological, geographical and ecological features can also is conducting research in areas where there is extensive prior afect connectivity, and therefore, the distribution of genetic information about abundances and environmental factors diversity (Palumbi 1994). In particular, on rocky shores, the that could afect the persistence of foating substrata, espe- tidal height where the organisms are distributed might infu- cially detached seaweeds. In particular, one of the oceans ence the genetic structure of local populations, with species where there have been several studies on rafting and phylo- from medium and high tidal levels having greater genetic geography of seaweeds is the South East Pacifc coast (SEP, structure than species from the low intertidal or subtidal ~14°S to 56°S) (Thiel and Gutow 2005b; Fraser et al. 2010; zone (Kelly and Palumbi 2010). This is frequently assumed Macaya and Zuccarello 2010a, b; see also for review Guil- to be due to the patchiness and greater variety of environ- lemin et al. 2016a). In this zone, phylogeographic studies of mental stresses in the high- to mid-intertidal zones that may benthic species (invertebrates and seaweeds) have focused generate diferential natural selection than in lower zones on testing the concordance between the proposed biogeo- where the conditions tend to be more homogeneous. Sev- graphic boundaries (at 30°S and 42°S) and phylogeographic eral studies have reported this pattern, which tends to be breaks (for recent reviews see Haye et al. 2014; Guillemin more prevalent in seaweeds and sessile invertebrates (Engel et al. 2016a). In particular, seaweed species with low dis- et al. 2004; Billard et al. 2005; Valero et al. 2011; Krueger- persal ability presented notorious phylogeographic breaks, Hadfeld et al. 2013; Robuchon et al. 2014). suggesting that evolutionary lineages constitute distinct Seaweeds from intertidal or shallow subtidal habitats are phylogenetic species, as in the intertidal macroalgae Les- considered good models for phylogeographic studies (Hu sonia nigrescens (now separated into L. berteroana and L. et al. 2016). This is due to the complex reproductive cycles spicata; Tellier et al. 2009; González et al. 2012) and Maz- (alternation of haploid and diploid phases) of numerous spe- zaella laminarioides (Montecinos et al. 2012). On the other cies from all seaweed divisions that may afect the genetic hand, seaweeds with high dispersal ability have shallow structure of their populations (Krueger-Hadfeld and Hoban phylogeographic breaks and a low genetic structure, such 2016), coupled with the low dispersal capacity of spores as the foating kelp Macrocystis pyrifera (Macaya and Zuc- (Santelices 1980; Destombe et al. 1992). However, other carello 2010a, b). A distinct phylogeographic pattern (i.e., mechanisms such as rafting permit dispersal over long dis- strong genetic structure and high values of genetic diversity) tances (Thiel and Haye 2006; Muhlin et al. 2008; Fraser has been reported for the bull kelp Durvillaea antarctica, a et al. 2009a; 2010; Coyer et al. 2011a, b). For example, species with a high dispersal potential by rafting,
Load more

Recommended publications
  • The Prostrate System of the Gelidiales: Diagnostic and Taxonomic Importance
    Article in press - uncorrected proof Botanica Marina 49 (2006): 23–33 ᮊ 2006 by Walter de Gruyter • Berlin • New York. DOI 10.1515/BOT.2006.003 The prostrate system of the Gelidiales: diagnostic and taxonomic importance Cesira Perrone*, Gianni P. Felicini and internal rhizoidal filaments (the so-called hyphae, rhi- Antonella Bottalico zines, or endofibers) (Feldmann and Hamel 1934, 1936, Fan 1961, Lee and Kim 2003) and a triphasic isomorphic life history, whilst the family Gelidiellaceae (Fan 1961) is Department of Plant Biology and Pathology, University based on 1) the lack of hyphae and 2) the lack of sexual of Bari-Campus, Via E. Orabona 4, 70125 Bari, Italy, reproduction. Two distinct kinds of tetrasporangial sori, e-mail: [email protected] the acerosa-type and the pannosa-type, were described * Corresponding author in the genus Gelidiella J. Feldmann et Hamel (Feldmann and Hamel 1934, Fan 1961). Very recently, the new genus Parviphycus Santelices (Gelidiellaceae) has been pro- Abstract posed to accommodate those species previously assigned to Gelidiella that bear ‘‘pannosa-type’’ tetra- Despite numerous recent studies on the Gelidiales, most sporangial sori and show sub-apical cells under- taxa belonging to this order are still difficult to distinguish going a distichous pattern of division (Santelices 2004). when in the vegetative or tetrasporic state. This paper Gelidium J.V. Lamouroux and Pterocladia J. Agardh, describes in detail the morphological and ontogenetic two of the most widespread genera (which have been features of the prostrate system of the order with the aim confused) of the Gelidiaceae, are separated only by basic of validating its diagnostic and taxonomic significance.
    [Show full text]
  • Marine Macroalgal Biodiversity of Northern Madagascar: Morpho‑Genetic Systematics and Implications of Anthropic Impacts for Conservation
    Biodiversity and Conservation https://doi.org/10.1007/s10531-021-02156-0 ORIGINAL PAPER Marine macroalgal biodiversity of northern Madagascar: morpho‑genetic systematics and implications of anthropic impacts for conservation Christophe Vieira1,2 · Antoine De Ramon N’Yeurt3 · Faravavy A. Rasoamanendrika4 · Sofe D’Hondt2 · Lan‑Anh Thi Tran2,5 · Didier Van den Spiegel6 · Hiroshi Kawai1 · Olivier De Clerck2 Received: 24 September 2020 / Revised: 29 January 2021 / Accepted: 9 March 2021 © The Author(s), under exclusive licence to Springer Nature B.V. 2021 Abstract A foristic survey of the marine algal biodiversity of Antsiranana Bay, northern Madagas- car, was conducted during November 2018. This represents the frst inventory encompass- ing the three major macroalgal classes (Phaeophyceae, Florideophyceae and Ulvophyceae) for the little-known Malagasy marine fora. Combining morphological and DNA-based approaches, we report from our collection a total of 110 species from northern Madagas- car, including 30 species of Phaeophyceae, 50 Florideophyceae and 30 Ulvophyceae. Bar- coding of the chloroplast-encoded rbcL gene was used for the three algal classes, in addi- tion to tufA for the Ulvophyceae. This study signifcantly increases our knowledge of the Malagasy marine biodiversity while augmenting the rbcL and tufA algal reference libraries for DNA barcoding. These eforts resulted in a total of 72 new species records for Mada- gascar. Combining our own data with the literature, we also provide an updated catalogue of 442 taxa of marine benthic
    [Show full text]
  • Advances in Cultivation of Gelidiales
    Advances in cultivation of Gelidiales Michael Friedlander Originally published in the Journal of Applied Phycology, Vol 20, No 5, 1–6. DOI: 10.1007/s10811-007-9285-1 # Springer Science + Business Media B.V. 2007 Abstract Currently, Gelidium and Pterocladia (Gelidiales) Introduction are collected or harvested only from the sea. Despite several attempts to develop a cultivation technology for Gelidium, As far as I know there is no current commercial cultivation no successful methodology has yet been developed. Initial of Gelidiales. Despite several attempts to develop a steps towards developmental efforts in Portugal, Spain, cultivation technology for Gelidium and Pterocladia, so far South Africa and Israel have been published. More no successful methodology has been developed. Because of developments have probably been performed but have not the proprietary nature of commercial cultivation, a success- been published. Two different technological concepts have ful technology may have been developed but has remained been tested for Gelidium cultivation: (1) the attachment of unpublished. Gelidium and Pterocladia (or Pterocladiella) Gelidium fragments to concrete cylinders floating in the are currently only collected or harvested, as opposed to sea, and (2) free-floating pond cultivation technology. other useful seaweeds for which cultivation technology has These vegetative cultivation technologies might be partially been developed. The reasons for this situation are discussed optimized by controlling physical, chemical and biological in this review, including all important variables affecting growth factors. The pond cultivation technology is the Gelidium and Pterocladia growth. This review will rely much more controllable option. The effects of all factors are mostly on Gelidium studies since most of the relevant discussed in detail in this review.
    [Show full text]
  • Rhodophyta, Gelidiales) from Japan
    Phycological Research 2000; 48: 95–102 New records of Gelidiella pannosa, Pterocladiella caerulescens and Pterocladiella caloglossoides (Rhodophyta, Gelidiales) from Japan Satoshi Shimada* and Michio Masuda Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan 1991; Price and Scott 1992), only one species, Geli- SUMMARY diella acerosa (Forsskål) Feldmann et Hamel, has been recorded from the Yaeyama Islands, where numerous Three gelidialean species, Gelidiella pannosa (Feld- tropical algae are known (Yamada and Tanaka 1938; mann) Feldmann et Hamel, Pterocladiella caerulescens Segawa and Kamura 1960; Akatsuka 1973; Ohba and (Kützing) Santelices et Hommersand and Pterocladiella Aruga 1982). In the present paper, three tropical caloglossoides (Howe) Santelices, are newly reported species, Gelidiella pannosa (Feldmann) Feldmann et from Japan, and their characteristic features are des- Hamel, Pterocladiella caerulescens (Kützing) San- cribed. Monoecious plants of P. caerulescens produce telices et Hommersand and Pterocladiella caloglos- spermatangial sori on: (i) fertile cystocarpic branchlets; soides (Howe) Santelices, are newly reported from the (ii) special spermatangial branchlets on a cystocarpic Yaeyama Islands. Their phylogenetic positions within axis; and (iii) branchlets of a special spermatangial axis. the order Gelidiales are discussed with the aid of mol- The latter two are newly reported in this species. Geli- ecular phylogenetic study using nuclear-encoded small diella pannosa has numerous unicellular independent subunit ribosomal DNA (SSU rDNA) sequences and points of attachment, whereas P. caerulescens and secondary rhizoidal attachments. P. caloglossoides have the peg type of secondary rhizoidal anchorage. In the molecular phylogenetic study using small subunit ribosomal DNA sequences, MATERIALS AND METHODS G. pannosa is included in the Gelidiella clade with Specimens examined were collected at localities shown 100% bootstrap support in neighbor-joining (NJ) analy- in Table 1.
    [Show full text]
  • Defence on Surface of Rhodophyta Halymenia Floresii
    THESE DE DOCTORAT DE UNIVERSITE BRETAGNE SUD ECOLE DOCTORALE N° 598 Sciences de la Mer et du littoral Spécialité : Biotechnologie Marine Par Shareen A ABDUL MALIK Defence on surface of Rhodophyta Halymenia floresii: metabolomic fingerprint and interactions with the surface-associated bacteria Thèse présentée et soutenue à « Vannes », le « 7 July 2020 » Unité de recherche : Laboratoire de Biotechnologie et Chimie Marines Thèse N°: Rapporteurs avant soutenance : Composition du Jury : Prof. Gérald Culioli Associate Professor Président : Université de Toulon (La Garde) Prof. Claire Gachon Professor Dr. Leila Tirichine Research Director (CNRS) Museum National d’Histoire Naturelle, Paris Université de Nantes Examinateur(s) : Prof. Gwenaëlle Le Blay Professor Université Bretagne Occidentale (UBO), Brest Dir. de thèse : Prof. Nathalie Bourgougnon Professor Université Bretagne Sud (UBS), Vannes Co-dir. de thèse : Dr. Daniel Robledo Director CINVESTAV, Mexico i Invité(s) Dr. Gilles Bedoux Maître de conferences Université Bretagne Sud (UBS), Vannes Title: Systèmes de défence de surface de la Rhodophycée Halymenia floresii : Analyse metabolomique et interactions avec les bactéries épiphytes Mots clés: Halymenia floresii, antibiofilm, antifouling, métabolomique, bactéries associées à la surface, quorum sensing, molecules de défense Abstract : Halymenia floresii, une Rhodophycée présente Vibrio owensii, ainsi que son signal C4-HSL QS, a été une surface remarquablement exempte d'épiphytes dans les identifié comme pathogène opportuniste induisant un conditions de l'Aquaculture MultiTrophique Intégrée (AMTI). blanchiment. Les métabolites extraits de la surface et Ce phénomène la présence en surface de composés actifs de cellules entières de H. floresii ont été analysés par allélopathiques. L'objectif de ce travail a été d'explorer les LC-MS.
    [Show full text]
  • Multiple Interaction of Factors in the Distribution of Some Hawaiian Gelidiales (Rhodophyta)!
    Pacific Science (1978), vol. 32, no. 2 © 1978 by The University Press of Hawaii. All rights reserved Multiple Interaction of Factors in the Distribution of Some Hawaiian Gelidiales (Rhodophyta)! B. SANTELICES 2 ABSTRACT: The biomass distribution of the three most common species of Gelidiales on three reefs of Oa'hu wa's found to form zones parallel to the shore correlated with the changing values of light intensity and water move­ ment. Pterocladia caerulescens was restricted to the nearshore margin of reefs, tolerating intermediate intensities of water movement and some 30 to 100 percent of the incident light. Gelidiella acerosa occurred on the central part of the reefs, and while having similar light tolerances had a lower water movement optimum. Toward the seaward edge of the reef P. capillacea was restricted to areas with high water movement and much lower incident light (down to 6 percent). Thallus size and horizontal distribution of the two species of Pterocladia and biomass of all-three species had a seasonal cycle with a maxi­ mum during December and a minium in May. All the biological cycles cor­ related significantly with seasonal changes in light intensity and water move­ ment but did not relate to the seasonal changes of water temperature and salinity. Laboratory experiments tested: the' effects of five single factors and nine types of interactions on the growth and bleaching of the three species of Gelidiales. Results indicate that water movement and light intensity are indeed the factors regulating growth and bleaching of these algae in the field. Salinity and temperature attained statistically significant effects only at values exceeding those found in the field.
    [Show full text]
  • Identificação E Caraterização Da Flora Algal E Avaliação Do
    “A língua e a escrita não chegam para descrever todas as maravilhas do mar” Cristóvão Colombo Agradecimentos Aqui agradeço a todas as pessoas que fizeram parte deste meu percurso de muita alegria, trabalho, desafios e acima de tudo aprendizagem: Ao meu orientador, Professor Doutor Leonel Pereira por me ter aceite como sua discípula, guiando-me na execução deste trabalho. Agradeço pela disponibilidade sempre prestada, pelos ensinamentos, conselhos e sobretudo pelo apoio em altura mais complicadas. Ao Professor Doutor Ignacio Bárbara por me ter auxiliado na identificação e confirmação de algumas espécies de macroalgas. E ao Professor Doutor António Xavier Coutinho por me ter cedido gentilmente, diversas vezes, o seu microscópio com câmara fotográfica incorporada, o que me permitiu tirar belas fotografias que serviram para ilustrar este trabalho. Ao meu colega Rui Gaspar pelo interesse demonstrado pelo meu trabalho, auxiliando-me sempre que necessário e também pela transmissão de conhecimentos. Ao Sr. José Brasão pela paciência e pelo auxílio técnico no tratamento das amostras. Em geral, a todos os meus amigos que me acompanharam nesta etapa de estudante de Coimbra e que me ajudaram a sê-lo na sua plenitude, e em particular a três pessoas: Andreia, Rita e Vera pelas nossas conversas e pelo apoio que em determinadas etapas foram muito importantes e revigorantes. Às minhas últimas colegas de casa, Filipa e Joana, pelo convívio e pelo bom ambiente “familiar” que se fazia sentir naquela casinha. E como os últimos são sempre os primeiros, à minha família, aos meus pais e à minha irmã pelo apoio financeiro e emocional, pela paciência de me aturarem as “neuras” e pelo acreditar sempre que este objectivo seria alcançado.
    [Show full text]
  • Mycosporine-Like Amino Acids (Maas) Profile of Two Marine Red Macroalgae, Gelidium Sp
    A. Pandey et al. (2017) Int. J. Appl. Sci. Biotechnol. Vol 5(1): 12-21 DOI: 10.3126/ijasbt.v5i1.16568 Research Article Mycosporine-Like Amino Acids (MAAs) Profile of Two Marine Red Macroalgae, Gelidium sp. and Ceramium sp. Abha Pandey, Shruti Pandey, Rajneesh, Jainendra Pathak, Haseen Ahmed, Vidya Singh Shailendra P. Singh and Rajeshwar P. Sinha* Laboratory of Photobiology and Molecular Microbiology, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi-221005, India *Corresponding author: Prof. Dr. Rajeshwar P. Sinha Laboratory of Photobiology and Molecular Microbiology, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi-221005, India emails: [email protected]; [email protected] Tel.: +91 542 2307147; Fax: +91 542 2366402 Abstract Macroalgae have evolved different strategies to mitigate the damaging effects of solar ultraviolet radiation (UVR), including accumulation of photoprotective compounds such as mycosporine-like amino acids (MAAs). MAAs are secondary metabolites, synthesized by a large variety of organisms including macroalgae, phytoplanktons, cyanobacteria, lichen, fungi and some marine animals. MAAs act as photoprotectants and antioxidants. In the present investigation, MAAs profile of methanolic extracts of two marine red algae Gelidium sp. and Ceramium sp., collected from their natural environment, was studied. High-performance liquid chromatography (HPLC) and UV-Vis spectrometry analyses were used to reveal different MAAs profile in the extracts obtained from these two red algae. The MAAs isolated by HPLC were identified as shinorine (λmax= 333.5 nm), porphyra-334 (λmax=332.3 nm) and palythine (λmax=317.9 nm) having retention times (RT) 1.26, 2.12 and 3.64 min, respectively, in the extract obtained from Gelidium sp.
    [Show full text]
  • Frond Dynamics of the Commercial Seaweed Gelidium Sesquipedale: Effects of Size and of Frond History
    MARINE ECOLOGY PROGRESS SERIES Vol. 107: 295-305, 1994 Published April 28 Mar. Ecol. Prog. Ser. Frond dynamics of the commercial seaweed Gelidium sesquipedale: effects of size and of frond history Rui Santos* Laboratorio Nacional de Engenharia e Tecnologia Industrial, Departamento de Estudos de Impacte Industrial. Estrada do Paqo do Lumiar, Azinhaga dos Lameiros, P-1600 Lisboa, Portugal ABSTRACT: Ge'dium sesquipedale (Clem.) Born. et Thur. is commercially exploited along the north- east Atlantic for the production of agar. Its frond dynamics were studied by tagging individual fronds in a typlcal, dense, monospecific G. sesquipedale stand located in a commercial bed off Cape Espichel, Portugal. Storms and commercial harvesting play a key role in the regulation of the species popula- tion dynamics. Frond mortality was relatively constant throughout the year, but peaked in August-September during harvest season. High probabilities of frond breakage and low frond mortal- ity during late fall and winter (periods coincident with severe storms) suggest that under natural dis- turbances, G. sesquipedale fronds break rather than detach. Frond elongation rate shows a distinct sea- sonal pattern: high during spring and summer and low In winter. The relat~onships among G. sesquipedalevital rates and both size and frond history (i.e. effects of frond length on mortality, growth and breakage, and effects of frond length, growth, breakage and presence of epiphytes on the next month's growth, breakage and mortality) were analysed using log-linear methods. Shorter fronds (S 10.1 cm) were less susceptible to breakage and had higher growth probability than longer fronds, while longer fronds showed higher elongation rates, particularly during the periods of faster growth (late spring and summer).
    [Show full text]
  • Aquatic Botany 119 (2014) 73–79
    Aquatic Botany 119 (2014) 73–79 Contents lists available at ScienceDirect Aquatic Botany jou rnal homepage: www.elsevier.com/locate/aquabot Genetic connectivity between trans-oceanic populations of Capreolia implexa (Gelidiales, Rhodophyta) in cool temperate waters of Australasia and Chile a b c,d e a,∗ Ga Hun Boo , Andres Mansilla , Wendy Nelson , Alecia Bellgrove , Sung Min Boo a Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea b Laboratory of Macroalgas Antárticas y Subantárticas (LMAS), Universidad de Magallanes, P.O. Box 113-D, Punta Arenas, Chile c National Institute of Water and Atmospheric Research, Private Bag 14-901, Wellington 6241, New Zealand d School of Biological Sciences, University of Auckland, Private Bag 92-019, Auckland 1142, New Zealand e Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Warrnambool, Victoria 3280, Australia a r t i c l e i n f o a b s t r a c t Article history: Capreolia is a monospecific genus of gelidioid red algae and has been considered to be endemic to Aus- Received 30 April 2014 tralasia. This is the first report on the occurrence of Capreolia implexa outside of Australasian waters, Received in revised form 5 August 2014 based on investigations of fresh collections in southern Chile as well as Australia and New Zealand. Accepted 7 August 2014 Thalli are prostrate and form entangled turfs, growing on high intertidal rocks at three locations in Chile. Available online 17 August 2014 Analyses of rbcL and cox1 revealed that C. implexa was of Australasian origin and also distinct from its relatives.
    [Show full text]
  • Rediscovery of Gelidiella Ramellosa (Kiitzing) Feldmann Et Hamel (Gelidiales, Rhodophyta) from Near the Type Locality in Western Australia
    Cryptogamie, Algol., 2009, 30 (1): 3-16 © 2009 Adac. Tous droits reserves Rediscovery of Gelidiella ramellosa (Kiitzing) Feldmann et Hamel (Gelidiales, Rhodophyta) from near the type locality in Western Australia John M. HUISMANa*, Julia C. PHILLIPSb & D. Wilson FRESHWATERc a School of Biological Sciences and Biotechnology, Murdoch University, Murdoch, W.A. 6150, Australia and Western Australian Herbarium, Department of Environment and Conservation, George St., Kensington, W.A. 6151, Australia b CSIRO Marine & Atmospheric Research, Private Bag No. 5, Wembley, W.A. 6913, Australia c Center for Marine Science, University. of North Carolina at Wilmington, 5600 Marvin Moss Lane, Wilmington, NC 28409. U.S.A. (Received 4 July 2008, accepted 5 November 2008) Abstract- The poorly known red alga Gelidiella ramellosa (Ki.itzing) Feldmann et Hamel is described from specimens collected near the type locality in Western Australia. Plants occur as turfs to 1-2 em in height, with prostrate stolons attached by clusters of rhizoids to rock. Erect axes are irregularly pinnately branched and terete to slightly compressed. Structurally, the medulla is pseudoparenchymatous with no discernable central axis, and rhizines are absent. Spermatangia occur in surface sori. Tetrasporangia are borne in irregular whorls in terete, basally constricted stichidia that are lateral on erect axes. LSU nrDNA and rbcL sequence analyses clearly place G. ramellosa in a clade containing species of Gelidiella and Parviphycus, but are equivocal regarding its relationship with either genus. Gelidiella I Gelidiales I Parviphycus I Rhodophyta I RbcL I nrDNA LSU I Western Australia Resume - Redecouverte du Gelidiella ramellosa (Kiitzing) Feldmann et Hamel (Gelidiales, Rhodophyta) pres de Ia localite-type en Australie Occidentale.
    [Show full text]
  • Spectroscopic Characterization and Gel Properties of Agar from Two Gelidium Species from the Atlantic Coast of Morocco
    Article Volume 11, Issue 5, 2021, 12642 - 12652 https://doi.org/10.33263/BRIAC115.1264212652 Spectroscopic Characterization and Gel Properties of Agar from Two Gelidium Species from the Atlantic Coast of Morocco Zahira Belattmania 1,* , Fouad Bentiss 2,3 , Charafeddine Jama 3 , Amal Nadri 1, Abdeltif Reani 1 , Brahim Sabour 1 1 R.U. Phycology, Blue Biodiversity & Biotechnology—P3B, Laboratory of Plant Biotechnology, Ecology and Ecosystem Valorization, Faculty of Sciences, Chouaïb Doukkali University, P.O. Box 20, El Jadida M-24000, Morocco; [email protected] (Z.B.); [email protected] (A.N.); [email protected] (A.R.); [email protected] (B.S.); 2 Laboratory of Catalysis and Corrosion of Materials, Faculty of Sciences, Chouaïb Doukkali University, P.O. Box 20, El Jadida M-24000, Morocco; [email protected] (F.B.); 3 University of Lille, CNRS, INRAE, Centrale Lille, UMR 8207, UMET—Unité Matériaux et Transformations, F-59000 Lille, France; [email protected] (C.J.) ; * Correspondence: [email protected] (Z.B.) Scopus Author ID 56676284700 Received: 29.12.2020; Revised: 23.01.2021; Accepted: 25.01.2021; Published: 31.01.2021 Abstract: The commercial value of agar in the phycocolloid market depends mostly on the agar yield and quality. The present study investigates the agar content and characterization of two Gelidiales Gelidium corneum and Gelidium microdon from the Moroccan Atlantic coast. Spectroscopic and rheological characterization of extracted agar without and with alkali pretreatments were evaluated. The highest agar yield was detected for mild alkaline pretreatment (N2CO3). The native agar content in G.
    [Show full text]