DOCSLIB.ORG

Effect of Wild-Harvest on a Commercially Important Seaweed: a Case Study of Mazzaella Laminarioides (Rodophyta, Gigartinaceae) I

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Effect of Wild-Harvest on a Commercially Important Seaweed: a Case Study of Mazzaella Laminarioides (Rodophyta, Gigartinaceae) I EFFECT OF WILD-HARVEST ON A COMMERCIALLY IMPORTANT SEAWEED: A CASE STUDY OF MAZZAELLA LAMINARIOIDES (RODOPHYTA, GIGARTINACEAE) IN SOUTH-CENTRAL, CHILE A DISSERTATION SUBMITTED TO THE GRADUATE DIVISION OF THE UNIVERSITY OF HAWAI‘I AT MĀNOA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN BOTANY AUGUST 2019 By Gioconda Lopez Vargas Dissertation Committee: Tamara Ticktin, Chairperson Celia Smith Jaime Ortiz Orou Gaoue Theodore Radovich Keywords: Seaweeds, Mazzaella laminarioides, ethnobotany, harvest, population ecology, antioxidants ACKNOWLEDGEMENTS Throughout the development and completion of this dissertation I have received huge support and help from many people. First, I would like to thank my supervisor, Dr Tamara Ticktin, whose guidance, support and encouragement where crucial for the completion and enjoyment of this process. I would also like to thank my thesis committee -Celia Smith, Theodore Radovich, Jaime Ortiz and Orou Gaoue- for their valuable feedback. I specially would like to acknowledge Dr Celia Smith, for teaching me algal ecology and inspire me with her passion for limu. I would also like to thanks Jaime Ortiz and his lab for providing the knowledge, space and materials to carry out chemical analyses. Additionally, I am thankful for all the advice, materials and support offered by Alejandra Gonzales, who shared her experience on Chilean algae ecology with me. Thank to the many people whose generosity and hospitality made this process possible and enjoyable. I would like to thank the botany department of the University of Hawai‘I, classmates, officemates, and especially I want to acknowledge the diverse, inspiring, and always positive members of Ticktin Lab, past and present. Thank to the community members and the seaweed gatherers of Matanzas, Isla Santa Maria and Isla Mocha for their uninterested participation, help and hospitality during my field work. I am grateful to my family and friends for their endless support and love, and to my boyfriend Patrick for his immense patience, support and also for his help editing the document. Lastly I want to thank the institutions that funded my studies and research. My PhD was funded by Becas Chile fellowship from the National Commission for Scientific and Technological Research, CONICYT, Chile. My research was supported by the Beatrice Krauss Fellowship Fund in Botany, Department of Botany, University of Hawaiʻi; and funds donated by the consultant company Econetwork, Chile. And my assistant to the Phycological Society of America meeting in 2019 was funded by the PSA Hoshaw Award. ii ABSTRACT To characterize the uses of seaweed, and investigate the socio-economical and ecological impact of harvest form wild-stocks, I focused on a case-study of Mazzaella laminarioides in South- Central Chile. First, I carried out a literature review and ethnobotanical surveys to compile lists of the species of seaweeds used in Chile and in South-Central Chile. I recorded that just 3% of the species of seaweeds present in Continental Chile had traditional and/or contemporary use, and nine of them are currently used for production of polysaccharides. Then I used chemical analyses to test if species used for food and medicine have high nutritional values and antioxidant potential. The results showed high nutritional values and antioxidant content for the species studied, especially for the species Pyropia columbina, which presented high values of proteins, minerals and antioxidants. I also described the international and local context of intensification of seaweed extraction and the socioeconomic changes related to the polysaccharides market in South-Central Chile, I found changes in harvester demography, incorporation of new technologies, and increasing intensity and frequency of harvest. Then, I used manipulative harvest experiments and chemical analyses to evaluate how environmental factors and harvest affect the antioxidant potential of Mazzaella laminarioides; and I found no significant effects of abiotic, biotic predictors, or harvesting, on antioxidant potential. I also recorded a tendency for a negative relationship between temperature and total phenolic compounds. iii Lastly, I used a manipulative experiment to test the effects of harvest strategies on population size and reproductive potential of a population of M. laminarioides from South-Central Chile. During one harvesting season, I monitored the effects of harvest treatment on variables related to population size and reproductive potential. By the end of the experiment, the treatment that showed a recovery for most of the variables studied, particularly for population size, was hand- pull once. However none of the treatments recovered for total number of reproductive fronds, which can have negative effects on the population at long term. The results of the study suggest that the most sustainable strategy would be pulling fronds by hand, rotating harvesting areas and waiting longer to revisit the same spot. This would provide more and bigger fronds, and reduce the negative impact of harvest on the population. iv TABLE OF CONTENTS ACKNOWLEDGEMENTS .......................................................................................................................... ii ABSTRACT ................................................................................................................................................. iii TABLE OF CONTENTS .............................................................................................................................. v LIST OF TABLES ...................................................................................................................................... vii LIST OF FIGURES ...................................................................................................................................... x Chapter 1: INTRODUCTION ....................................................................................................................... 2 Chapter 2: ETHNOBOTANY OF CHILEAN SEAWEEDS: TRADITIONAL AND CONTEMPORARY USES OF SEAWEEDS IN SOUTH-CENTRAL CHILE. ......................................................... 9 2.1 Abstract ....................................................................................................................................... 9 2.2 Introduction ............................................................................................................................... 10 2.3 Methodology ............................................................................................................................. 15 2.4 Results and Discussion ............................................................................................................. 21 Chapter 3: EFFECTS OF HARVESTING AND ENVIRONMENTAL FACTORS ON ANTIOXIDANT PRODUCTION OF MAZZAELLA LAMINARIOIDES ......................................................... 49 3.1 Abstract ..................................................................................................................................... 49 3.2 Introduction ............................................................................................................................... 51 3.3 Methodology ............................................................................................................................. 56 3.4 Results ....................................................................................................................................... 61 3.5 Discussion ................................................................................................................................. 66 Chapter 4: ECOLOGICAL EFFECTS OF SEAWEED HARVESTING: A CASE STUDY OF HARVESTING AND POPULATION DYNAMICS OF MAZZAELLA LAMINARIOIDES IN MATANZAS, CHILE ......................................................................................................... 68 4.1 Abstract ..................................................................................................................................... 68 4.2 Introduction ............................................................................................................................... 69 4.3 Methodology ............................................................................................................................. 77 4.4 Results ....................................................................................................................................... 82 4.5 Discussion ................................................................................................................................. 99 Chapter 5: CONCLUSIONS ..................................................................................................................... 105 Appendix A: UNIVERSITY OF HAWAIʻI COMMITTEE ON HUMAN SUBJECTS' RESEARCH EXEMPTION ......................................................................................................................... 113 Appendix B: SUPPLEMENTARY INFORMATON OF TRADITIONAL AND CONTEMPORARY USES OF SEAWEEDS. ......................................................................................................... 120 v Appendix C: DETAIL OF RESULTS AND MODELS USED TO ASSESS EFFECTS OF HARVESTING AND ENVIRONMENTAL FACTORS ON ANTIOXIDANT POTENTIAL ................................................................................................................................................ 121 Appendix D: DETAIL OF RESULTS AND
Load more

Recommended publications
  • Intertidal and Subtidal Benthic Seaweed Diversity of South Georgia
    Intertidal and Subtidal Benthic Seaweed Diversity of South Georgia Report for the South Georgia Heritage Trust Survey September 2011 Shallow Marine Survey Group E Wells1, P Brewin and P Brickle 1 Wells Marine, Norfolk, UK Executive Summary South Georgia is a highly isolated island with its marine life influenced by the circumpolar currents. The local seaweed communities have been researched sporadically over the last two centuries with most species collections and records documented for a limited number of sites within easy access. Despite the harsh conditions of the shallow marine environment of South Georgia a unique and diverse array of algal flora has become well established resulting in a high level of endemism. Current levels of seaweed species diversity were achieved along the north coast of South Georgia surveying 15 sites in 19 locations including both intertidal and subtidal habitats. In total 72 species were recorded, 8 Chlorophyta, 19 Phaeophyta and 45 Rhodophyta. Of these species 24 were new records for South Georgia, one of which may even be a new record for the Antarctic/sub-Antarctic. Historic seaweed studies recorded 103 species with a new total for the island of 127 seaweed species. Additional records of seaweed to the area included both endemic and cosmopolitan species. At this stage it is unknown as to the origin of such species, whether they have been present on South Georgia for long periods of time or if they are indeed recent additions to the seaweed flora. It may be speculated that many have failed to be recorded due to the nature of South Georgia, its sheer isolation and inaccessible coastline.
    [Show full text]
  • The Bladed Bangiales (Rhodophyta) of the South Eastern Pacific: Molecular Species Delimitation Reveals Extensive Diversity Q
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/282253048 Una nueva mirada sobre la diversidad y el endemismo de las Bangiales foliosas a lo largo de la costa de Chile Conference Paper · April 2014 CITATIONS READS 0 236 8 authors, including: Marie-Laure Guillemin Juliet Brodie Universidad Austral de Chile Natural History Museum, London 109 PUBLICATIONS 979 CITATIONS 182 PUBLICATIONS 3,169 CITATIONS SEE PROFILE SEE PROFILE María Eliana Ramírez Erasmo C Macaya University of Concepción 30 PUBLICATIONS 286 CITATIONS 108 PUBLICATIONS 1,476 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Clonix View project Taxonomy and phylogenetics of the Bangiales (Rhodophyta) View project All content following this page was uploaded by Loretto Contreras-Porcia on 24 March 2017. The user has requested enhancement of the downloaded file. Molecular Phylogenetics and Evolution 94 (2016) 814–826 Contents lists available at ScienceDirect Molecular Phylogenetics and Evolution journal homepage: www.elsevier.com/locate/ympev The bladed Bangiales (Rhodophyta) of the South Eastern Pacific: Molecular species delimitation reveals extensive diversity q Marie-Laure Guillemin a,b, Loretto Contreras-Porcia c,d, María Eliana Ramírez c,e, Erasmo C. Macaya f,g, ⇑ Cristian Bulboa Contador c, Helen Woods h,i, Christopher Wyatt j,k, Juliet Brodie h, a Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile,
    [Show full text]
  • Redalyc.Lista Sistemática De Los Moluscos Marinos Y Estuarinos Del
    Comunicaciones de la Sociedad Malacológica del Uruguay ISSN: 0037-8607 [email protected] Sociedad Malacológica del Uruguay Uruguay Clavijo, Cristhian; Scarabino, Fabrizio; Rojas, Alejandra; Martínez, Sergio Lista sistemática de los moluscos marinos y estuarinos del cuaternario de Uruguay Comunicaciones de la Sociedad Malacológica del Uruguay, vol. 9, núm. 88, 2005, pp. 381-411 Sociedad Malacológica del Uruguay Montevideo, Uruguay Disponible en: http://www.redalyc.org/articulo.oa?id=52408804 Cómo citar el artículo Número completo Sistema de Información Científica Más información del artículo Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Página de la revista en redalyc.org Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto Comunicaciones de la Sociedad Malacológica del Uruguay ISSN 0037- 8607 9 (88): 381 – 411. 2005 LISTA SISTEMÁTICA DE LOS MOLUSCOS MARINOS Y ESTUARINOS DEL CUATERNARIO DE URUGUAY Cristhian Clavijo § , Fabrizio Scarabino § , Alejandra Rojas * & Sergio Martínez * R ESUMEN Hasta el momento han sido citadas 142 especies de moluscos marinos y estuarinos para el Cuaternario de Uruguay. Esta fauna está compuesta taxonómicamente de la siguiente forma: Polyplacophora (2 especies), Scaphopoda (1), Gastropoda (66) y Bivalvia (73). PALABRAS CLAVE: Holoceno, Pleistoceno, Polyplacophora, Scaphopoda, Gastropoda, Bivalvia, Atlántico Sudoccidental. A BSTRACT Systematic list of the marine and estuarine molluscs from the Quaternary of Uruguay. Until now 142 species of marine and estuarine molluscs have been recorded from the Quaternary of Uruguay. This fauna is taxonomically composed as follows: Polyplacophora (2 species), Scaphopoda (1), Gastropoda (66) and Bivalvia (73). KEY WORDS: Holocene, Pleistocene, Polyplacophora, Scaphopoda, Gastropoda, Bivalvia, Southwestern Atlantic. INTRODUCCIÓN pobremente estudiados, constituyendo un particular ejemplo de los desafíos a superar.
    [Show full text]
  • 2004 University of Connecticut Storrs, CT
    Welcome Note and Information from the Co-Conveners We hope you will enjoy the NEAS 2004 meeting at the scenic Avery Point Campus of the University of Connecticut in Groton, CT. The last time that we assembled at The University of Connecticut was during the formative years of NEAS (12th Northeast Algal Symposium in 1973). Both NEAS and The University have come along way. These meetings will offer oral and poster presentations by students and faculty on a wide variety of phycological topics, as well as student poster and paper awards. We extend a warm welcome to all of our student members. The Executive Committee of NEAS has extended dormitory lodging at Project Oceanology gratis to all student members of the Society. We believe this shows NEAS members’ pride in and our commitment to our student members. This year we will be honoring Professor Arthur C. Mathieson as the Honorary Chair of the 43rd Northeast Algal Symposium. Art arrived with his wife, Myla, at the University of New Hampshire in 1965 from California. Art is a Professor of Botany and a Faculty in Residence at the Jackson Estuarine Laboratory of the University of New Hampshire. He received his Bachelor of Science and Master’s Degrees at the University of California, Los Angeles. In 1965 he received his doctoral degree from the University of British Columbia, Vancouver, Canada. Over a 43-year career Art has supervised many undergraduate and graduate students studying the ecology, systematics and mariculture of benthic marine algae. He has been an aquanaut-scientist for the Tektite II and also for the FLARE submersible programs.
    [Show full text]
  • Pyropia Orbicularis Sp. Nov. (Rhodophyta, Bangiaceae) Based
    Pyropia orbicularis sp. nov. (Rhodophyta, Bangiaceae) based on a population previously known as Porphyra columbina from the central coast of Chile Maria-Eliana Ramirez, Loretto Contreras-Porcia, Marie-Laure Guillemin, Juliet Brodie, Catalina Valdivia, María Rosa Flores-Molina, Alejandra Núñez, Cristian Bulboa Contador, Carlos Lovazzano To cite this version: Maria-Eliana Ramirez, Loretto Contreras-Porcia, Marie-Laure Guillemin, Juliet Brodie, Catalina Val- divia, et al.. Pyropia orbicularis sp. nov. (Rhodophyta, Bangiaceae) based on a population previously known as Porphyra columbina from the central coast of Chile. Phytotaxa, Magnolia Press 2014, 158 (2), pp.133-153. hal-01138605 HAL Id: hal-01138605 https://hal.archives-ouvertes.fr/hal-01138605 Submitted on 17 Apr 2015 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. 1 Pyropia orbicularis sp. nov. (Rhodophyta, Bangiaceae) based on a 2 population previously known as Porphyra columbina from the central 3 coast of Chile 4 MARÍA ELIANA RAMÍREZ1, LORETTO CONTRERAS-PORCIA2,*, MARIE-LAURE 5 GUILLEMIN3,*,
    [Show full text]
  • Article PHYTOTAXA Copyright © 2012 Magnolia Press ISSN 1179-3163 (Online Edition)
    Phytotaxa 54: 1–12 (2012) ISSN 1179-3155 (print edition) www.mapress.com/phytotaxa/ Article PHYTOTAXA Copyright © 2012 Magnolia Press ISSN 1179-3163 (online edition) A new species of Pyropia (Rhodophyta, Bangiaceae), from the Pacific coast of Mexico, based on morphological and molecular evidence LUZ ELENA MATEO-CID1*, ANGELA CATALINA MENDOZA-GONZÁLEZ1, JHOANA DÍAZ- LARREA2, ABEL SENTÍES2, FRANCISCO F. PEDROCHE3 & JUAN DIEGO SÁNCHEZ HEREDIA4 1 Departamento de Botánica, Escuela Nacional de Ciencias Biológicas, IPN. Carpio y Plan de Ayala s/n. Mexico, D.F. 11340. 2 Departamento de Hidrobiología. Universidad Autónoma Metropolitana-Iztapalapa. A.P. 55-535, Mexico, D.F. 09340, Mexico. 3 Departamento de Ciencias Ambientales. Universidad Autónoma Metropolitana-Lerma, Mexico. 4 Facultad de Biología. Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico. * Corresponding author: E-mail: [email protected] Abstract Pyropia raulaguilarii sp. nov. is described from Michoacán, tropical Mexican Pacific, on basis of comparative morphology and nrSSU, rbcL sequence analysis. It is distinguished from other Pyropia species by the foliose and lanceolate gametophyte, a monoecious thallus and the zygotosporangia in packets of 2x2x4. The phylogenetic analysis showed that the two Pacific Mexican samples, from Caletilla and Carrizalillo (Michoacán), were almost identical and formed a distinctive and well supported clade segregated from other species of Pyropia from Brazil, USA and Mexico. The Mexican entity is morphologically and genetically distinct from other Pyropia species, suggesting that this species should be assigned to a new taxon. Key words: Bangiales, molecular phylogeny, nrSSU, rbcL, marine red algae. Introduction Species of Porphyra C.Agardh have few characters for distinguishing species, however, these characters alone have proved to be misleading based on the discovery, using molecular sequences, of many cryptic taxa among species with very similar morphologies (e.g.
    [Show full text]
  • Population Genetics and Desiccation Stress of Porphyra Umbilicalis Kützing in the Gulf of Maine
    University of New Hampshire University of New Hampshire Scholars' Repository Doctoral Dissertations Student Scholarship Winter 2018 POPULATION GENETICS AND DESICCATION STRESS OF PORPHYRA UMBILICALIS KÜTZING IN THE GULF OF MAINE Yuanyu Cao University of New Hampshire, Durham Follow this and additional works at: https://scholars.unh.edu/dissertation Recommended Citation Cao, Yuanyu, "POPULATION GENETICS AND DESICCATION STRESS OF PORPHYRA UMBILICALIS KÜTZING IN THE GULF OF MAINE" (2018). Doctoral Dissertations. 2429. https://scholars.unh.edu/dissertation/2429 This Dissertation is brought to you for free and open access by the Student Scholarship at University of New Hampshire Scholars' Repository. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of University of New Hampshire Scholars' Repository. For more information, please contact [email protected]. POPULATION GENETICS AND DESICCATION STRESS OF PORPHYRA UMBILICALIS KÜTZING IN THE GULF OF MAINE BY YUANYU CAO B.A., Jimei University, Xiamen, Fujian, Peoples Republic of China, 2008 M. S., Jimei University, Xiamen, Fujian, Peoples Republic of China, 2013 DISSERTATION Submitted to the University of New Hampshire in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Genetics December 2018 This dissertation has been examined and approved in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Genetics by: Dissertation Dir. Anita S. Klein, Assoc. Professor of Biological Sciences Estelle M. Hrabak, Assoc. Professor of Molecular, Cellular, & Biomedical Sci. Matthew D. MacManes, Asst. Professor of Molecular, Cellular, & Biomedical Sci. Arthur Mathieson, Professor of Plant Biology W. Kelley Thomas, Professor of Molecular, Cellular, & Biomedical Sci. On September 13, 2018 ii DEDICATION To my husband, Mengmeng.
    [Show full text]
  • Short-Term Effects of Solar UV Radiation and NO Supply on the Accumulation of Mycosporine-Like Amino Acids in Pyropia Columbina
    DOI 10.1515/bot-2013-0090 Botanica Marina 2014; 57(1): 9–20 Nelso P. Navarro, Andrés Mansilla, Félix L. Figueroa, Nathalie Korbee, Jocelyn Jofre and Estela Plastino* - Short-term effects of solar UV radiation and NO3 supply on the accumulation of mycosporine-like amino acids in Pyropia columbina (Bangiales, Rhodophyta) under spring ozone depletion in the sub-Antarctic region, Chile Abstract: Short-term variations of mycosporine-like amino Introduction acids (MAAs) in Pyropia columbina (Montage) W.A. Nelson exposed to nitrate (NO -) enrichment under different out- 3 One of the most recognized atmospheric changes during door light treatments during the spring ozone depletion the last few decades has been the thinning of the strato- of 2008 in Punta Arenas (Chile) were investigated. Seg- spheric ozone layer (Kirchhoff et al. 1997). This phenom- ments of P. columbina thalli were cultivated under three enon has resulted in increasing levels of ultraviolet B treatments of solar radiation without or with NO - supply 3 radiation (UVB: 280–315 nm) (Seckmeyer and McKenzie (0.38 mmol l-1): PAR (P), PAR+UVA (PA), and PAR+UVA+UVB 1992). Even though the concentration of ozone-depleting (PAB). Samples were taken at 8:00 h (initial value), 9:30, substances in the atmosphere is decreasing, the full recov- 12:30, 15:30, and 18:00 h on November 8 and at 9:00 h on ery of the ozone layer to the 1980s levels is still far from November 9 (recovery period). A complex dynamic of MAAs complete. There is greater uncertainty about the future affected by light quality and NO - supply was observed.
    [Show full text]
  • Cleaning by Beaching: Introducing a New Alternative for Hull Biofouling Management in Argentina
    Aquatic Invasions (2020) Volume 15, Issue 1: 63–80 Special Issue: Proceedings of the 10th International Conference on Marine Bioinvasions Guest editors: Amy Fowler, April Blakeslee, Carolyn Tepolt, Alejandro Bortolus, Evangelina Schwindt and Joana Dias CORRECTED PROOF Research Article Cleaning by beaching: introducing a new alternative for hull biofouling management in Argentina Karen Lidia Castro1,2,3,*, Clara Belen Giachetti1,2,4, Nicolás Battini1,2,4, Alejandro Bortolus1,5 and Evangelina Schwindt1,2 1Grupo de Ecología en Ambientes Costeros (GEAC), Argentina 2Instituto de Biología de Organismos Marinos (IBIOMAR-CONICET), Blvd. Brown 2915, Puerto Madryn (U9120ACD), Chubut, Argentina 3Centro Regional Universitario Bariloche, Universidad Nacional del Comahue (CRUB, UNCo), Argentina 4Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (FCEyN, UBA), Argentina 5Instituto Patagónico para el Estudio de los Ecosistemas Continentales (IPEEC-CONICET), Blvd. Brown 2915, Puerto Madryn (U9120ACD), Chubut, Argentina Author e-mails: [email protected] (KLC), [email protected] (CBG), [email protected] (NB), [email protected] (AB), [email protected] (ES) *Corresponding author Co-Editors’ Note: This study was first presented at the 10th International Conference Abstract on Marine Bioinvasions held in Puerto Madryn, Argentina, October 16–18, 2018 Recreational vessels favor the secondary spread of exotic marine species hosted on (http://www.marinebioinvasions.info). Since hull biofouling communities
    [Show full text]
  • Genetic and Morpho-Physiological Differentiation in a Limpet Population
    Nuñez et al. Helgol Mar Res (2018) 72:16 https://doi.org/10.1186/s10152-018-0519-1 Helgoland Marine Research ORIGINAL ARTICLE Open Access Genetic and morpho‑physiological diferentiation in a limpet population across an intertidal gradient Jesús Darío Nuñez*, Pedro Fernández Iriarte, Emiliano Hernán Ocampo, Enrique Madrid and Maximiliano Cledón Abstract Marine organism adaptive capacity to diferent environmental conditions is a research priority to understand what conditions are important in structuring the spatial distribution of natural populations. In this context, this study evalu- ates whether potential diferences in Siphonaria lessonii morphology (size and shell shape) and physiology (water loss regulation) at diferent shore heights are linked to genetically distinguishable individuals. To achieve this goal, we compared size-frequency distribution, morphometric, and genetic data (ISSR-PCR technique) of S. lessonii from the upper, middle and lower shore. We complemented these feld samplings with laboratory experiments on water loss and mortality. Genetic analysis showed diferent genetic composition for individuals from the upper and lower shore. This pattern was accompanied by morpho-physiological variations: the upper shore had fewer small limpets, lower shell shape dispersion (with a morphotype characterized by a higher shell), and less water loss and mortality related to air exposure than the lower shore. The results reported herein support the idea that the extreme and unpredict- able conditions of the upper shore may impose strong selection pressure on its inhabitants, leading to considerable morpho-physiological diferentiation consistent with diferent genetic composition. This probably plays an important role in structuring the spatial distribution of natural S. lessonii populations with a possible efect on size-structure distribution.
    [Show full text]
  • Seaweeds of California Green Algae
    PDF version Remove references Seaweeds of California (draft: Sun Nov 24 15:32:39 2019) This page provides current names for California seaweed species, including those whose names have changed since the publication of Marine Algae of California (Abbott & Hollenberg 1976). Both former names (1976) and current names are provided. This list is organized by group (green, brown, red algae); within each group are genera and species in alphabetical order. California seaweeds discovered or described since 1976 are indicated by an asterisk. This is a draft of an on-going project. If you have questions or comments, please contact Kathy Ann Miller, University Herbarium, University of California at Berkeley. [email protected] Green Algae Blidingia minima (Nägeli ex Kützing) Kylin Blidingia minima var. vexata (Setchell & N.L. Gardner) J.N. Norris Former name: Blidingia minima var. subsalsa (Kjellman) R.F. Scagel Current name: Blidingia subsalsa (Kjellman) R.F. Scagel et al. Kornmann, P. & Sahling, P.H. 1978. Die Blidingia-Arten von Helgoland (Ulvales, Chlorophyta). Helgoländer Wissenschaftliche Meeresuntersuchungen 31: 391-413. Scagel, R.F., Gabrielson, P.W., Garbary, D.J., Golden, L., Hawkes, M.W., Lindstrom, S.C., Oliveira, J.C. & Widdowson, T.B. 1989. A synopsis of the benthic marine algae of British Columbia, southeast Alaska, Washington and Oregon. Phycological Contributions, University of British Columbia 3: vi + 532. Bolbocoleon piliferum Pringsheim Bryopsis corticulans Setchell Bryopsis hypnoides Lamouroux Former name: Bryopsis pennatula J. Agardh Current name: Bryopsis pennata var. minor J. Agardh Silva, P.C., Basson, P.W. & Moe, R.L. 1996. Catalogue of the benthic marine algae of the Indian Ocean.
    [Show full text]
  • Macroalgas Marinas Bentónicas Del Submareal Somero De La Ecorregión Subantártica De Magallanes, Chile
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/265293883 Macroalgas Marinas Bentónicas del Submareal Somero de la Ecorregión Subantártica de Magallanes, Chile Article in Anales del Instituto de la Patagonia · December 2013 DOI: 10.4067/S0718-686X2013000200004 CITATIONS READS 3 140 7 authors, including: Andres Omar Mansilla Marcela Avila University of Magallanes Arturo Prat University 175 PUBLICATIONS 604 CITATIONS 41 PUBLICATIONS 333 CITATIONS SEE PROFILE SEE PROFILE Jaime Ojeda University of Magallanes 36 PUBLICATIONS 89 CITATIONS SEE PROFILE Some of the authors of this publication are also working on these related projects: HISTORICAL AND RECENT BIOGEOGRAPHIC PATTERNS AND PROCESSES IN SOUTHERN OCEAN MARINE MOLLUSKS WITH CONTRASTING DEVELOPMENTAL MODES View project Phylogeography, population genetic structure and connectivity of the Subantarctic crab Halicarcinus planatus, the first alien marine invertebrate discovered in Antarctica View project All content following this page was uploaded by Sebastian Rosenfeld on 03 September 2014. The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately. Anales Instituto Patagonia (Chile), 2013. 41(2):49-62 49 MACROALGAS MARINAS BENTÓNICAS DEL SUBMAREAL SOMERO DE LA ECORREGIÓN SUBANTÁRTICA DE MAGALLANES, CHILE SHALLOW SUBTIDAL BENTHIC MARINE MACROALGAE FROM THE MAGELLAN SUBANTARCTIC ECOREGION, CHILE Andrés Mansilla1,4, Marcela Ávila2, María E. Ramírez3, Juan Pablo Rodriguez1,4, Sebastián Rosenfeld1,4,5, Jaime Ojeda1, & Johanna Marambio1,5 ABSTRACT The area of channels and fjords belonging to the Magellan subantarctic has a high diversity of macroalgae, in relation to the temperate areas of South America.
    [Show full text]