DOCSLIB.ORG

A Taphonomic Comparison Between the Strait of Magellan and the Beagle Channel Andean Geology, Vol

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
A Taphonomic Comparison Between the Strait of Magellan and the Beagle Channel Andean Geology, Vol Andean Geology ISSN: 0718-7092 [email protected] Servicio Nacional de Geología y Minería Chile Cárdenas, Javiera; Gordillo, Sandra Paleoenvironmental interpretation of late Quaternary molluscan assemblages from southern South América: A taphonomic comparison between the Strait of Magellan and the Beagle Channel Andean Geology, vol. 36, núm. 1, enero, 2009, pp. 81-93 Servicio Nacional de Geología y Minería Santiago, Chile Available in: http://www.redalyc.org/articulo.oa?id=173914379007 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Andean Geology 36 (1): 81-93. January, 2009 Andean Geology formerly Revista Geológica de Chile www.scielo.cl/rgch.htm Paleoenvironmental interpretation of late Quaternary molluscan assemblages from southern South America: A taphonomic comparison between the Strait of Magellan and the Beagle Channel Javiera Cárdenas1, 2, Sandra Gordillo3, 4 1 Fundación Centro de Estudios del Cuaternario (CEQUA), Av. Bulnes 01855, Punta Arenas, Chile. 2 Centro de Ciencias Ambientales EULA-Chile, Universidad de Concepción, Casilla 160-C, Barrio Universitario s/n, Concepción, Chile. [email protected] 3 Centro de Investigaciones en Ciencias de la Tierra, Consejo Nacional de Investigaciones Científicas y Técnicas (CICTERRA, CO- NICET), Av. Vélez Sársfield 1611, X5016GCA, 5000, Córdoba, Argentina. 4 Centro de Investigaciones Paleobiológicas (CIPAL), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, 5000, Córdoba, Argentina. [email protected] ABSTRACT. This study analyzes the Holocene molluscan assemblage in raised marine terraces along the coasts of the Strait of Magellan and the Beagle Channel. A total of 33 gastropods and 12 bivalves were identifi ed. They constitute the fi rst mollusk listing for deposits in the Strait of Magellan. Taphonomic analysis suggests a high energy environment with epifaunal elements in the Strait of Magellan and a low energy environment with the predominance of infaunal elements in the Beagle Channel. All the collected species are living taxa suggesting that postglacial climatic variations were not enough to alter the composition of the communities since at least 6,000 yr BP in the southern Chile-Argentina region. Keywords: Late Quaternary, Mollusks, Paleoecology, Taphonomy, Strait of Magellan, Beagle Channel, Chile, Argentina. RESUMEN. Interpretación paleoambiental de ensambles de moluscos del Cuaternario tardío del sur de América del Sur: una comparación tafonómica entre el Estrecho de Magallanes y el Canal Beagle. Este trabajo analiza los ensambles de moluscos del Holoceno de las terrazas marinas presentes a lo largo de las costas del Estrecho de Magallanes y del Canal Beagle. Un total de 33 especies de gastrópodos y 12 de bivalvos fueron identifi cados. Ellos constituyen un primer listado de moluscos para los depósitos del Estrecho de Magallanes. El análisis tafonómico sugiere un ambiente de alta energía con elementos epifaunales en el Estrecho de Magallanes y un ambiente de baja energía con el predominio de elementos infaunales para el Canal Beagle. Todas las especies colectadas son taxa vivientes, lo que sugiere que las variaciones climáticas postglaciales no fueron sufi cientes para alterar la composición de las comunidades desde al menos 6.000 años AP en el extremo austral de Chile-Argentina. Palabras claves: Cuaternario tardío, Moluscos, Paleoecología, Tafonomía, Estrecho de Magallanes, Canal Beagle, Chile, Argentina. 82 PALEOENVIRONMENTAL INTERPRETATION OF LATE QUATERNARY MOLLUSCAN ASSEMBLAGES FROM SOUTHERN SOUTH AMERICA... 1. Introduction occupied by outlet glaciers of an expanded southern Andean ice cap during successive Pleistocene gla- The southern tip of South America, Tierra ciations (Porter et al., 1992; Kilian et al., 2007). del Fuego, experienced the combined effects of Today, the strait is dominated by an indented rocky glaciations, changes in the sea level and inter- shoreline and characterized by semi-diurnal and rupted connectivity between the Atlantic and the heterogeneous tides with mean amplitudes ranging Pacifi c Ocean. Given that this area lies between both from 1.2 m on the west coast to 9 m in the Atlantic oceans, it is a critical region for the evaluation of inlet of the east coast (Andrade, 1991). paleoenvironmental changes and the interpretation Brambati et al. (1998) recognized four orders of faunal distributions in the Magellan Region (Gor- of marine terraces: I, II, III and IV order; with their dillo et al., 2008). Previous research in the Strait age estimations based on radiometric dating of fossil of Magellan and the Beagle Channel revealed that macrofauna. The selected localities for paleonto- marine events during the Pleistocene and Holocene logical samples correspond to fi ve sites previously are represented by marine terraces with altitudinal dated by Brambati et al. (1998): Bahía Porvenir differences resulting from glacio-isostatic effects (BP), Puerto del Hambre (PH), Punta Palo (PP), and the neotectonic uplift which occurred after the Punta Zeger (PZ) and Seno Otway (SO) (Table 1). Last Glacial Maximum (LGM) (Brambati et al., Beagle Channel . The Beagle Channel is located in 1998; Rabassa et al., 2000). the seismically active tectonic area of the Fuegian Quaternary marine deposits containing mainly Andes and was covered during the Last Glacial mollusks are extensively distributed along the Maximum. This channel is a glacial Andean valley, coasts of the Strait of Magellan and the Beagle occupied by the sea since 8,000 yr BP (Rabassa Channel (Rabassa et al., 1986; Gordillo et al., 1992; et al., 1986). It extends for 180 km long in a W-E Brambati et al., 1998). Previous studies along the trend linking the Atlantic and Pacifi c oceans along southern Tierra del Fuego coastline show that mol- the southern coast of Tierra del Fuego. The northern lusks are a key to reconstruct Holocene paleocom- Beagle Channel is characterized by a Holocene te- munities (Gordillo, 1999) and to evaluate changes rrace system with at least 3 orders of terraces at 10-8 in faunal composition after the LGM (Gordillo et m, 6-4 m and 3-1.5 m (Gordillo et al., 1992). Today, al., 2005). Interspecies variations existing in the the Beagle Channel, is dominated by an indented, fossil record are the result of a combination of rocky shoreline, with pocket gravel beaches. Tides life habits, intrinsic shell properties and habitat. are semi-diurnal with mean amplitudes of one me- In this way, taphonomic analyses may constitute a ter (e.g., 1.1 m at Ushuaia) (Gordillo et al., 1992). powerful tool for paleoenvironmental analyses of The selected study localities for paleontological Quaternary marine deposits (Brandt, 1989; Nielsen samples correspond to sites previously dated (Table and Funder, 2003). 1): Alakush (AK), Bahía Brown (BB, two levels), The objective of this study is to compare the Harberton (HA), Isla Gable (IG), Lago Roca (LR) Holocene molluscan assemblages located along and Ushuaia (US). the Strait of Magellan and the Beagle Channel coastlines by means of taxonomic, paleoecologic 2.2. Material studied and taphonomic analyses. 2.2.1. Taxa composition and paleoecology 2. Materials and Methods Fossil mollusks were collected from selected terraces in the Strait of Magellan and the Beagle 2.1. Study area Channel. Three samples of 10 dm3 bulk of sediment and biologic material were obtained from each terra- The coastal area examined in this study consists ce; samples were sieved in the fi eld using 1 mm and of 11 localities, with a total of 14 marine terraces 0.05 mm sieves to reduce volume. All specimens along the Strait of Magellan and the Beagle Channel were sorted, counted and identifi ed to the species le- (Fig. 1, Table 1). vel in the laboratory. Taxonomic and paleoecologic Strait of Magellan. The Strait of Magellan separates aspects of the mollusks were studied and examined. Patagonia from Tierra del Fuego. It was repeatedly The autoecological characterization of the fossil Cárdenas and Gordillo/ Andean Geology 36 (1): 81-93, 2009 83 Punta Zeger; PZ: Punta Palo; PP: Puerto del Hambre; PH: Ushuaia. Bahía Porvenir; US: BP: Lago Roca; LR: Isla Gable; IG: Harberton; HA: les from Strait of Magellan and Beagle Channel. fi Bahía Brown; BB: Alakush; AK: Seno Otway; SO: FIG. 1. Map of the localities sampled and stratigraphic pro 84 PALEOENVIRONMENTAL INTERPRETATION OF ATE UATERNARY MOLLUSCAN ASSEMBLAGES FROM SOUTHERN OUTH MERICA L Q S A ... (5) (4) (3) (1) (2) (3) (3) (6) cur- te cor- lled with fresh- fi 1986; (6) Gordillo, 1990. et al., Characteristics of the sampling sites References 1992; (4) Gordillo, 1991; (5) Rabassa et al., Ushuaia Peninsula. at present it is a freshwater lake disconnected from the open sea. nel into two branches forming its narrowest part. rent coast. It is constituted by a sandy substrate. land, constituted by southeast-trending bedrock ridges formed gravel. drumlin channel. responds to sand and gravel. are constituted mainly by gravel. order, Both deposits, III and IV gravelly and sandy deposits. that is also disconnected from the open sea at present. It is formed by a series of low, that is also disconnected from the open sea at present. It formed by a series of low, rounded bedrock hills, surrounded by interconnected depressions water. 8.0 This is a small embayment open to the east and protected from sea by 6.4 Although in the recent past this lake was part of a marine archipelago, 5.0 This 9 km long-island is located 70 east of Ushuaia and divides the Beagle Chan- 4.0 This bay is located about 50 km east of Ushuaia. 2.3 This deposit is located 9 km west of Estancia Harberton, lying on an ancient inter- 2.6 5.0Archipelago) This site is a raised beach located in an area (the so-called Cormoranes (m a.s.l.) Elevation AECV-876c AC-1060 AECV-648c 4,000-5,000 1.5The rocky coast of the main- Arenas.
Load more

Recommended publications
  • Land Use Policy from the Holocene to the Anthropocene
    Land Use Policy 27 (2010) 148–160 Contents lists available at ScienceDirect Land Use Policy journal homepage: www.elsevier.com/locate/landusepol From the Holocene to the Anthropocene: A historical framework for land cover change in southwestern South America in the past 15,000 years Juan J. Armesto a,b,∗, Daniela Manuschevich a,b, Alejandra Mora a, Cecilia Smith-Ramirez a, Ricardo Rozzi a,c,d, Ana M. Abarzúa a,e, Pablo A. Marquet a,b a Instituto Milenio de Ecología & Biodiversidad, Casilla 653, Santiago, Chile b CASEB, Departamento de Ecología, Pontificia Universidad Católica de Chile, Alameda 340, Casilla 114-D, Santiago, Chile c Universidad de Magallanes, Punta Arenas, Chile d Department of Philosophy, University of North Texas, Denton, TX 76201, USA e Instituto de Geociencias, Universidad Austral de Chile, Valdivia, Chile article info abstract Article history: The main forest transitions that took place in south-central Chile from the end of the last glaciation to the Received 15 September 2008 present are reviewed here with the aim of identifying the main climatic and socio-economic drivers of land Received in revised form 10 July 2009 cover change. The first great transition, driven primarily by global warming, is the postglacial expansion Accepted 15 July 2009 of forests, with human populations from about 15,000 cal. yr. BP, restricted to coastlines and river basins and localized impact of forest fire. Charcoal evidence of fire increased in south-central Chile and in global Keywords: records from about 12,000 to 6000 cal. yr. BP, which could be attributed at least partly to people.
    [Show full text]
  • Chapter 10 RIPOSTE and REPRISE
    Chapter 10 RIPOSTE AND REPRISE ...I have given the name of the Strait of the Mother of God, to what was formerly known as the Strait of Magellan...because she is Patron and Advocate of these regions....Fromitwill result high honour and glory to the Kings of Spain ... and to the Spanish nation, who will execute the work, there will be no less honour, profit, and increase. ...they died like dogges in their houses, and in their clothes, wherein we found them still at our comming, untill that in the ende the towne being wonderfully taynted with the smell and the savour of the dead people, the rest which remayned alive were driven ... to forsake the towne.... In this place we watered and woodded well and quietly. Our Generall named this towne Port famine.... The Spanish riposte: Sarmiento1 Francisco de Toledo lamented briefly that ‘the sea is so wide, and [Drake] made off with such speed, that we could not catch him’; but he was ‘not a man to dally in contemplations’,2 and within ten days of the hang-dog return of the futile pursuers of the corsair he was planning to lock the door by which that low fellow had entered. Those whom he had sent off on that fiasco seem to have been equally, and reasonably, terrified of catching Drake and of returning to report failure; and we can be sure that the always vehement Pedro Sarmiento de Gamboa let his views on their conduct be known. He already had the Viceroy’s ear, having done him signal if not too scrupulous service in the taking of the unfortunate Tupac Amaru (above, Ch.
    [Show full text]
  • (Approx) Mixed Micro Shells (22G Bags) Philippines € 10,00 £8,64 $11,69 Each 22G Bag Provides Hours of Fun; Some Interesting Foraminifera Also Included
    Special Price £ US$ Family Genus, species Country Quality Size Remarks w/o Photo Date added Category characteristic (€) (approx) (approx) Mixed micro shells (22g bags) Philippines € 10,00 £8,64 $11,69 Each 22g bag provides hours of fun; some interesting Foraminifera also included. 17/06/21 Mixed micro shells Ischnochitonidae Callistochiton pulchrior Panama F+++ 89mm € 1,80 £1,55 $2,10 21/12/16 Polyplacophora Ischnochitonidae Chaetopleura lurida Panama F+++ 2022mm € 3,00 £2,59 $3,51 Hairy girdles, beautifully preserved. Web 24/12/16 Polyplacophora Ischnochitonidae Ischnochiton textilis South Africa F+++ 30mm+ € 4,00 £3,45 $4,68 30/04/21 Polyplacophora Ischnochitonidae Ischnochiton textilis South Africa F+++ 27.9mm € 2,80 £2,42 $3,27 30/04/21 Polyplacophora Ischnochitonidae Stenoplax limaciformis Panama F+++ 16mm+ € 6,50 £5,61 $7,60 Uncommon. 24/12/16 Polyplacophora Chitonidae Acanthopleura gemmata Philippines F+++ 25mm+ € 2,50 £2,16 $2,92 Hairy margins, beautifully preserved. 04/08/17 Polyplacophora Chitonidae Acanthopleura gemmata Australia F+++ 25mm+ € 2,60 £2,25 $3,04 02/06/18 Polyplacophora Chitonidae Acanthopleura granulata Panama F+++ 41mm+ € 4,00 £3,45 $4,68 West Indian 'fuzzy' chiton. Web 24/12/16 Polyplacophora Chitonidae Acanthopleura granulata Panama F+++ 32mm+ € 3,00 £2,59 $3,51 West Indian 'fuzzy' chiton. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F+++ 44mm+ € 5,00 £4,32 $5,85 Caribbean. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F++ 35mm € 2,50 £2,16 $2,92 Caribbean. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F+++ 29mm+ € 3,00 £2,59 $3,51 Caribbean.
    [Show full text]
  • Long-Distance Dispersal in Higher Latitude Sub-Antarctic Siphonaria
    Unexpected absence of island endemics: Long-distance dispersal in higher latitude sub-Antarctic Siphonaria (Gastropoda: Euthyneura) species Claudio González-Wevar, Nicolás Segovia, Sebastián Rosenfeld, Jaime Ojeda, Mathias Hüne, Javier Naretto, Thomas Saucède, Paul Brickle, Simon Morley, Jean-Pierre Feral, et al. To cite this version: Claudio González-Wevar, Nicolás Segovia, Sebastián Rosenfeld, Jaime Ojeda, Mathias Hüne, et al.. Unexpected absence of island endemics: Long-distance dispersal in higher latitude sub-Antarctic Siphonaria (Gastropoda: Euthyneura) species. Journal of Biogeography, Wiley, 2018, 45 (4), pp.874- 884. 10.1111/jbi.13174. hal-01698422 HAL Id: hal-01698422 https://hal.archives-ouvertes.fr/hal-01698422 Submitted on 15 May 2018 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. DOI: 10.1111/jbi.13174 ORIGINAL ARTICLE Unexpected absence of island endemics: Long-distance dispersal in higher latitude sub-Antarctic Siphonaria (Gastropoda: Euthyneura) species Claudio A. Gonzalez-Wevar 1,2 | Nicolas I. Segovia2 | Sebastian Rosenfeld1,2 | Jaime Ojeda1,2 | Mathias Hune€ 2 | Javier Naretto2 | Thomas Saucede 3 | Paul Brickle4,5 | Simon Morley6 | Jean-Pierre Feral 7 | Hamish G. Spencer8 | Elie Poulin2 1Laboratorio de Ecosistemas Marinos Antarticos y sub-Antarticos (LEMAS), Abstract Universidad de Magallanes, Punta Arenas, Aim: We assess biogeographical patterns, population structure and the range of Chile species in the pulmonate genus Siphonaria across the sub-Antarctic.
    [Show full text]
  • Cnidaria, Hydrozoa: Latitudinal Distribution of Hydroids Along the Fjords Region of Southern Chile, with Notes on the World Distribution of Some Species
    Check List 3(4): 308–320, 2007. ISSN: 1809-127X NOTES ON GEOGRAPHIC DISTRIBUTION Cnidaria, Hydrozoa: latitudinal distribution of hydroids along the fjords region of southern Chile, with notes on the world distribution of some species. Horia R. Galea 1 Verena Häussermann 1, 2 Günter Försterra 1, 2 1 Huinay Scientific Field Station. Casilla 462. Puerto Montt, Chile. E-mail: [email protected] 2 Universidad Austral de Chile, Campus Isla Teja. Avenida Inés de Haverbeck 9, 11 y 13. Casilla 467. Valdivia, Chile. The coast of continental Chile extends over and Cape Horn. Viviani (1979) and Pickard almost 4,200 km and covers a large part of the (1971) subdivided the Magellanic Province into southeast Pacific. While the coastline between three regions: the Northern Patagonian Zone, from Arica (18°20' S) and Chiloé Island (ca. 41°30' S) Puerto Montt to the Peninsula Taitao (ca. 46°–47° is more or less straight, the region between Puerto S), the Central Patagonian Zone to the Straits of Montt (ca. 41°30' S) and Cape Horn (ca. 56° S) is Magellan (ca. 52°–53° S), and the Southern highly structured and presents a large number of Patagonian Zone south of the Straits of Magellan. islands, channels and fjords. This extension is A recent study, including a wide set of formed by two parallel mountain ranges, the high invertebrates from the intertidal to 100 m depth Andes on Chile’s eastern border, and the coastal (Lancellotti and Vasquez 1999), negates the mountains along its western edge which, in the widely assumed faunal break at 42° S, and area of Puerto Montt, drop into the ocean with proposes a Transitional Temperate Region between their summits, forming the western channels and 35° and 48° S, where a gradual but important islands, while the Andes mountain range change in the species composition occurs.
    [Show full text]
  • O Estreito De Magalhães Redescoberto: CIÊNCIA, POLÍTICA E COMÉRCIO NAS EXPEDIÇÕES DE EXPLORAÇÃO NAS DÉCADAS DE 1820 E 1830 Antíteses, Vol
    Antíteses ISSN: 1984-3356 [email protected] Universidade Estadual de Londrina Brasil Passetti, Gabriel O Estreito de Magalhães redescoberto: CIÊNCIA, POLÍTICA E COMÉRCIO NAS EXPEDIÇÕES DE EXPLORAÇÃO NAS DÉCADAS DE 1820 E 1830 Antíteses, vol. 7, núm. 13, enero-junio, 2014, pp. 254-276 Universidade Estadual de Londrina Londrina, Brasil Disponível em: http://www.redalyc.org/articulo.oa?id=193331342013 Como citar este artigo Número completo Sistema de Informação Científica Mais artigos Rede de Revistas Científicas da América Latina, Caribe , Espanha e Portugal Home da revista no Redalyc Projeto acadêmico sem fins lucrativos desenvolvido no âmbito da iniciativa Acesso Aberto DOI: 10.5433/1984-3356.2014v7n13p254 O Estreito de Magalhães redescoberto: CIÊNCIA, POLÍTICA E COMÉRCIO NAS EXPEDIÇÕES DE EXPLORAÇÃO NAS DÉCADAS DE 1820 E 1830 Strait of Magellan rediscovered: science, politics, commerce and the exploring expeditions during the 1820’s and 1830’s Gabriel Passetti 1 RESUMO Este artigo discute o crescente interesse das potências ocidentais no Estreito de Magalhães, Patagônia e Terra do Fogo nas primeiras décadas do século XIX. São conectados os objetivos estratégicos dos governos aos comerciais de companhias de caça e comércio para a compreensão do financiamento de expedições oficiais de exploração e mapeamento da região. São analisados os relatos de dois comandantes britânicos a serviço da Marinha Real que percorreram aquela região e procuraram conciliar ciência e interesses pessoais na publicação de relatos de suas viagens, descrevendo descobertas, aventuras, a desconstrução de lendas e os tensos e conflituosos contatos com os indígenas locais. Palavras-chave: Estreito de Magalhães. Relatos de viagens. Expedições científicas de mapeamento.
    [Show full text]
  • Archivo Histórico
    ARCHIVO HISTÓRICO DOI: http://dx.doi.org/10.11565/arsmed.v38i1.94 El presente artículo corresponde a un archivo originalmente publicado en Ars Medica, revista de estudios médicos humanísticos, actualmente incluido en el historial de Ars Medica Revista de ciencias médicas. El contenido del presente artículo, no necesariamente representa la actual línea editorial. Para mayor información visitar el siguiente vínculo: http://www.arsmedica.cl/index.php/MED/about/su bmissions#authorGuidelines El Viaje1 Dr. Pedro Martínez Sanz Profesor Titular Facultad de Medicina Pontificia Universidad Católica de Chile Resumen Las exploraciones hidrográficas y geográficas siempre han sido necesarias para Inglaterra,muy consciente de su condición insular. El marino Robert Fitz Roy participa en dos de ellas incorporando a Charles Darwin en la segunda, quien a los 22 años era bachiller en Teología, Filosofía y Artes en Cambridge. Además se había preparado en geología e historia natural.Gran observador y capaz de llegar a conclusiones generales desde los detalles visibles. Ése viaje duró casi 5 años, tanto por mar como por las exploraciones por tierra que efectúo Darwin. Reconoció el bosque húmedo, los glaciares y fue testigo de erupciones volcánicas, maremotos y terremotos. En las Islas Galápagos hizo sus observaciones zoológicas que dieron base a sus postulados sobre el origen de las especies y la supervivencia de las más aptas. De vuelta en Inglaterra sus observaciones serán maduradas por él y sus seguidores, por décadas, tarea que continúa en la actualidad. palabras clave: Beagle, Patagonia; canales chilotes, bosque húmedo; fósiles; origen de las especies; selección natural. THE VOYAGE Hydrographical and geographic knowledge have been essential for England, an insular nation.
    [Show full text]
  • The False Limpet Siphonaria Gigas, a Simultaneous Hermaphrodite, Lives in Pairs in Rock Fissures on the Pacific Coast of Panama
    The false limpet Siphonaria gigas, a simultaneous hermaphrodite, lives in pairs in rock fissures on the Pacific coast of Panama Roberto C. Lombardo, John H. Christy & Roberto Cipriani Marine Biology International Journal on Life in Oceans and Coastal Waters ISSN 0025-3162 Mar Biol DOI 10.1007/s00227-012-2127-y 1 23 Your article is protected by copyright and all rights are held exclusively by Springer- Verlag (outside the USA). This e-offprint is for personal use only and shall not be self- archived in electronic repositories. If you wish to self-archive your work, please use the accepted author’s version for posting to your own website or your institution’s repository. You may further deposit the accepted author’s version on a funder’s repository at a funder’s request, provided it is not made publicly available until 12 months after publication. 1 23 Author's personal copy Mar Biol DOI 10.1007/s00227-012-2127-y ORIGINAL PAPER The false limpet Siphonaria gigas, a simultaneous hermaphrodite, lives in pairs in rock fissures on the Pacific coast of Panama Roberto C. Lombardo • John H. Christy • Roberto Cipriani Received: 4 September 2012 / Accepted: 10 November 2012 Ó Springer-Verlag (outside the USA) 2012 Abstract The pulmonate limpet Siphonaria gigas,a Introduction simultaneous hermaphrodite, lives in the mid- to upper- intertidal zone on rocky shores in the tropical Eastern The scale of non-random patterns of distribution and Pacific. Samples along five transects taken in June–July, abundance of intertidal organisms frequently indicates the 2004, on Culebra Point (88540Nto798310W), Republic of nature of the process responsible for them (Underwood and Panama, showed that 71 % of the population occurred in Chapman 1996).
    [Show full text]
  • Gastrópodos Prosobranquios Del Extremo Sur De Chile
    Boletín tlel Museo Nacional de Historia Natural, Chile, 48: 37-49 ( 1999) GASTRÓPODOS PROSOBRANQUIOS DEL EXTREMO SUR DE CHILE CECILIA OSORIO R. Departamento de Ciencias Ecológicas, Facultad de Ciencias Universidad de Chile. Casilla 653. Santiago, Chile email: [email protected] RESUMEN Durante la campaña científica realizada en 1994 por B/I alemán Victor Hensen en el Estrecho de Maga- llanes, Canales al Sur del Estrecho y alrededores del Beagle, en 24 estaciones a profundidades entre 15 y 664 m de profundidad se obtuvieron Moluscos Prosobranquios. Se registraron 12 familias, 23 géneros y 38 especies. De estas cinco son nuevos registros geográficos para el área (Margarella jason, Margarella tropidophoroides, Clilanidota densesculpta, Falsilunatia soluta y Xymenopsis muriciformis). Estos nue- vos hallazgos ratifican los procesos de intercambio de especies desde la Antàrtica hacia las áreas de más al norte. También fue posible observar el fenómeno contrario desde el norte al sur del continente como es el caso de Capulus ungaricoides. Palabras claves: Moluscos bentónicos. Archipiélago austral de Chile. ABSTRACT Twelve families, 23 genera and 38 species of prosobranchs molluscs obtained in 24 stations between 15 to 664 m, during the scientific campaign in 1994 by the german B/I Victor Hensen in the Straits of Magellan, channels to the south o f the Strait and around the Beagle Canal are informed. Of these, five are new geo- graphic registrations for the area (Margarella jason, Margarella tropidophoroides, Chlanidola denses- culpta, Falsilunatia soluta and Xymenopsis muriciformis). These new findings confirm the species ex- change process between Antarctica and areas towards the north. It was also possible to observe the oppo- site phenomenon from the north to the south o f the continent as is the case of Capulus ungaricoides.
    [Show full text]
  • CAMUS PATRICIO.Pmd
    Revista de Biología Marina y Oceanografía Vol. 48, Nº3: 431-450, diciembre 2013 DOI 10.4067/S0718-19572013000300003 Article A trophic characterization of intertidal consumers on Chilean rocky shores Una caracterización trófica de los consumidores intermareales en costas rocosas de Chile Patricio A. Camus1, Paulina A. Arancibia1,2 and M. Isidora Ávila-Thieme1,2 1Departamento de Ecología, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Casilla 297, Concepción, Chile. [email protected] 2Programa de Magister en Ecología Marina, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Casilla 297, Concepción, Chile Resumen.- En los últimos 50 años, el rol trófico de los consumidores se convirtió en un tópico importante en la ecología de costas rocosas de Chile, centrándose en especies de equinodermos, crustáceos y moluscos tipificadas como herbívoros y carnívoros principales del sistema intermareal. Sin embargo, la dieta y comportamiento de muchos consumidores aún no son bien conocidos, dificultando abordar problemas clave relativos por ejemplo a la importancia de la omnivoría, competencia intra-e inter-específica o especialización individual. Intentando corregir algunas deficiencias, ofrecemos a los investigadores un registro dietario exhaustivo y descriptores ecológicos relevantes para 30 especies de amplia distribución en el Pacífico sudeste, integrando muestreos estacionales entre 2004 y 2007 en 4 localidades distribuidas en 1.000 km de costa en el norte de Chile. Basados en el trabajo de terreno y laboratorio,
    [Show full text]
  • Efecto De Cirripedios En El Reclutamiento De La Lapa Fissurella Picta (Gmelin) Ciencias Marinas, Vol
    Ciencias Marinas ISSN: 0185-3880 [email protected] Universidad Autónoma de Baja California México López, Daniel A.; González, María L.; Uribe, José M.; Martínez, Rodrigo I.; Vergara, Pedro A. Efecto de cirripedios en el reclutamiento de la lapa fissurella picta (gmelin) Ciencias Marinas, vol. 25, núm. 1, marzo, 1999, pp. 75-90 Universidad Autónoma de Baja California Ensenada, México Disponible en: http://www.redalyc.org/articulo.oa?id=48025105 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 Ciencias Marinas (1999), 25(1): 75–90 EFECTO DE CIRRIPEDIOS EN EL RECLUTAMIENTO DE LA LAPA Fissurella picta (GMELIN) EFFECT OF CIRRIPEDS ON THE RECRUITMENT OF THE KEYHOLE LIMPET Fissurella picta (GMELIN) Daniel A. López* María L. González José M. Uribe Rodrigo I. Martínez Pedro A. Vergara Laboratorio de Cultivos Marinos Universidad de Los Lagos Casilla 933 Osorno, Chile * E-mail: [email protected] Recibido en febrero de 1998; aceptado en septiembre de 1998 RESUMEN Utilizando protocolos correlacionales y experimentales, se puso a prueba la hipótesis de que en sus- tratos intermareales y submareales el reclutamiento de la lapa, Fissurella picta (Gmelin), está determi- nado por la colonización de cirripedios. En mediciones y experimentos realizados en Bahía Metri, se evidenció que la abundancia de juveniles de F. picta, de tamaño inferior a 20 mm, ocurre principalmente en zonas expuestas al oleaje, donde dominan especies de cirripedios.
    [Show full text]
  • AMICI MOLLUSCARUM Sociedad Malacológica De Chile Número 17
    Amici Molluscarum 2009 (17) AMICI MOLLUSCARUM Sociedad Malacológica de Chile Número 17 Año XVII 2009 Acanthina monodon fotografía de Roland Sánchez. Amici Molluscarum 2009 (17) AMICI MOLLUSCARUM Número 17 Año XVII 2009 Amici Molluscarum es una revista de publicación anual, editado por la Sociedad Malacológica de Chile (SMACH) desde el año 1992, con el patrocinio del Museo Nacional de Historia Natural de Chile (MNHNCL), que tiene el propósito de comunicar notas, conferencias y artículos científicos en el área de la Malacología. Comité editorial Director Gonzalo Collado (Universidad de Chile) Editores Cristian Aldea (Universidad de Magallanes) Felipe Briceño (Sociedad Malacológica de Chile) Laura Huaquín (Sociedad Malacológica de Chile) Christian Ibáñez (Universidad de Chile) Cecilia Osorio (Universidad de Chile) Sergio Letelier (Museo Nacional de Historia Natural) Sociedad Malacológica de Chile Casilla 787 ‐Santiago de Chile, http://www.smach.cl; [email protected] Amici Molluscarum 2009 (17) INDICE ARTÍCULOS 1 - 4 Breve historia de la Sociedad Malacológica de Chile Cecilia Osorio, Laura Huaquín & Sergio Letelier COMUNICACIONES BREVES 5 - 6 Dispersión y genética de poblaciones en Concholepas concholepas (Bruguiére 1789): efectos de eventos contemporáneos e históricos Leyla Cárdenas 7 - 8 Filogeografía a lo largo de la costa del Pacífico Sureste: restringido flujo genético, alta variación morfológica e influencia biogeográfica en el gastrópodo marino Acanthina monodon Roland Sánchez CONGRESOS 9 - 10 Cephalopod International Advisory Council, Vigo 2009 Christian Ibáñez & M. Cecilia Pardo-Gandarillas NOTICIAS 11 Congreso Latino Americano de Malacología (CLAMA) FICHA DE MOLUSCO 12 - 14 Fissurella nigra Lesson, 1831 Gonzalo A. Collado REVISIÓN DE LIBRO 15 Cefalópodos de aguas chilenas: sistemática y biogeografía Christian M.
    [Show full text]