DOCSLIB.ORG

Iglesiasv0513.Pdf (3.556Mb)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Iglesiasv0513.Pdf (3.556Mb) HOLOCENE CLIMATE-VEGETATION-FIRE LINKAGES ALONG THE PATAGONIAN FOREST/STEPPE ECOTONE (41 – 43˚S) by Virginia Iglesias A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Ecology and Environmental Sciences MONTANA STATE UNIVERSITY Bozeman, Montana January 2013 ©COPYRIGHT by Virginia Iglesias 2013 All Rights Reserved ii APPROVAL of a dissertation submitted by Virginia Iglesias This dissertation has been read by each member of the dissertation committee and has been found to be satisfactory regarding content, English usage, format, citation, bibliographic style, and consistency and is ready for submission to The Graduate School. Dr. Cathy Whitlock Approved for the Department of Earth Sciences Dr. David Mogk Approved for The Graduate School Dr. Ronald W. Larsen iii STATEMENT OF PERMISSION TO USE In presenting this dissertation in partial fulfillment of the requirements for a doctoral degree at Montana State University, I agree that the Library shall make it available to borrowers under rules of the Library. I further agree that copying of this dissertation is allowable only for scholarly purposes, consistent with “fair use” as prescribed in the U.S. Copyright Law. Requests for extensive copying or reproduction of this dissertation should be referred to ProQuest Information and Learning, 300 North Zeeb Road, Ann Arbor, Michigan 48106, to whom I have granted “the exclusive right to reproduce and distribute my dissertation in and from microform along with the non- exclusive right to reproduce and distribute my abstract in any format in whole or in part.” Virginia Iglesias January 2013 iv ACKNOWLEDGEMENTS I would like to express my deep gratitude and appreciation to my advisor and committee chair, Dr. Cathy Whitlock, for her guidance, advice and thoughtful critique throughout all stages of this project. Her support, understanding and encouragement proved to be invaluable. I would like to extend special thanks to Dr. Mark Greenwood, Dr. Bruce Maxwell, Dr. Shannon Moreaux and Dr. Ken Pierce for their valuable and constructive suggestions and for serving as members on my committee. I owe sincere thankfulness to the members of the Paleoecology research group and Bob Gresswell, Vera Markgraf, María Martha Bianchi, Gustavo Villarosa, Valeria Outes, Thomas Kitzberger and Diego Navarro for their friendship and assistance. Finally, I would like to thank my family and Sep Mulder-Rosi, who provided me with moral support, encouragement, motivation and inspiration throughout the course of my study. v TABLE OF CONTENTS 1. INTRODUCTION TO DISSERTATION ………………………………..………..…..………. 1 Objectives ………………………………………………………………………..…………..……….. 4 Overview of Dissertation …………….…...………...……………………….....………..………… 8 References ……….……...………………………………...………..……………………..………… 12 2. HOLOCENE CLIMATE VARIABILITY AND ENVIRONMENTAL HISTORY AT THE PATAGOANIAN FOREST/STEPPE ECOTONE: LAGO MOSQUITO AND LAGUNA DEL CONDOR …………………………..……..……………………..……………. 16 Contribution of Authors and Co-Authors ……………………..…………...…………………. 16 Manuscript Information Page ………………………………..………………………………….. 17 Abstract ………………………………………………………………………………………....…… 18 Introduction ……………………...………………………………………………………………….. 19 Modern Setting ……………………………………………………………..………………………. 21 Methods ……………………………………………………………………………………………… 24 Results ……………………………………………………………………………………………….. 31 Lithology …………………………………………..……………………………………….….. 31 The Pollen and Charcoal Records ………………………………..………………….…… 33 Discussion ……………………………………...…………………………………………………… 38 Early Holocene (>9000 cal yr BP) ………………………………..……………………... 39 Middle Holocene (9000 - 5250 cal yr BP) ……......……………………………………. 40 Late Holocene (5250 cal yr BP - Present) …………….……….…………...…………... 43 Conclusions ………...…....………………………………………………………...……………….. 45 Acknowledgements ……………………………………………………………………………….. 47 References …………………………………...……………………………………………………… 48 3. CLIMATIC AND LOCAL CONTROLS OF LONG-TERM VEGETATION DYNAMICS IN NORTHERN PATAGONIA (LAT. 41°S) ………..………………………………………….....…………………..……………... 56 Contribution of Authors and Co-Authors ……………..……………………………………… 56 Manuscript Information Page …………………………………..……………………………….. 57 Abstract ……………………………………………………………………………………………… 58 Introduction …………………………………………...…….……………...……………………….. 58 Study Area ……………..……………………………………………………………………………. 60 Methods ……………………………………………………………….…………...….…....………… 62 Results ……………………………...………………………………………….…………………….. 67 Lithology ………………………………………..…………………………………………….. 67 L. Huala Hué ………………………….............………………...…………………………… 67 vi TABLE OF CONTENTS – CONTINUED L. Padre Laguna …………………..………………………………………………...… 68 The Pollen and Charcoal Records ………………..……………………………………… 69 L. Huala Hué …………………………...……………………………………………… 69 L. Padre Laguna …………….………..…………………………...………………...… 73 Discussion ……………………………………...…………………………………………………… 76 Regional Vegetation and Fire History …………….…………………………….……... 76 Late-Glacial/Early-Holocene Transition (13,500-11,200 cal yr BP) …..…... 76 Early and Middle Holocene (11,200-4900 cal yr BP) ………………...………. 78 Late Holocene (4900 cal yr BP to Present) …………………………………..….. 80 Distal and proximal controls of late-Holocene vegetation history……….………... 83 Conclusions …………………………...…………………………………………………………….. 86 Acknowledgements ……………………………………………………………………………….. 87 References ……………………………………...…………………………………………………… 88 4. CLIMATE-VEGETATION-FIRE LINKAGES AT LOCAL TO REGIONAL SCALES ALONG THE PATAGONIAN FOREST-STEPPE ECOTONE (41 – 43˚S) ……………………..………………………….... 89 Contribution of Authors and Co-Authors …………………………..………………………… 93 Manuscript Information Page …………………………………..……………………………….. 93 Abstract ……………………………………………………………………………………………… 94 Introduction ………………………………...……………………………………………………….. 95 Study Sites and Regional Setting ………………………..………………….…………………. 96 Climate ……………………………………………..……………..…………………..………. 99 Modern Vegetation ………………………...……………..……………..………..……..… 102 Modern Fire Regime ……………..……………..………………………………..…..…… 104 Methods ……………..………………………………...…….…………………………...………… 106 Sample Collection ………………………...………………………………………………. 107 Lithological Analyses …………..…………………………..………………………..…… 107 Charcoal and Pollen Analyses ………………………..…………………...………..…… 108 Time-Series Analysis …………………..…..………………………………….……..…… 111 Results ………………………………………………………………………………………..…….. 115 Chronologies ……………………………….……………………………………………….. 115 Lithology …………………………………..…………………………………..…………….. 117 L. La Zeta ……………………………………………………………………………... 117 L. Theobald ….………………………………...……………………………………... 120 The Pollen and Charcoal Records ………………..………………………..…………… 122 Time-Series Analysis Results …………………………………………..……………..… 130 Discussion ………………………...…………………………..…………………………………… 134 Vegetation and Fire History of the Forest/Steppe Ecotone ..…….……...….……... 134 vii TABLE OF CONTENTS – CONTINUED Regional Trends in Vegetation and Fire at the Northern Patagonian Forest/Steppe Ecotone …………………...……….…….………………… 142 Vegetation Dynamics along the Forest/Steppe Ecotone ...……...….…… 142 Changes in the Fire Regime since the Last Glacial Maximum ..……..… 147 Fire and Human Activity along the Forest/Steppe Ecotone ……………... 150 Conclusions ………………..…………………………………………………..………………….. 151 Acknowledgements ……..……………………………………………………………………….. 155 References ………………….….……………………...…………………………………………… 156 5. CONCLUSIONS ……………………….……………………….…………………….…………. 167 Postglacial Environmental History along the Forest/Steppe Ecotone ...……...…..…… 168 Biogeography of Austrocedrus chilensis …….………....……….…….…………..….. 171 Climate-Vegetation-Fire Linkages along the Forest/Steppe Ecotone …...….......…..... 173 Vegetation Dynamics since the Last Glacial Maximum …………….……..…….... 173 Changes in the Fire Regime since the Last Glacial Maximum ………...…......….. 177 Final Remarks ……………………….………………………………………....………………… 180 References ………….....……………………………...………………………...…………...…….. 182 REFERENCES CITED ....................................................................................................................... 187 viii LIST OF TABLES Table Page 2.1 Radiocarbon and calibrated radiocarbon dates from Lago Mosquito and Laguna del Condor ……………………...………………….. 39 3.1 Radiocarbon and calibrated radiocarbon dates from L. Huala Hué and L. Padre Laguna …………..……..………………………...…………... 65 4.1 Study site information ………………………..…………………………… 101 4.2 Radiocarbon and calibrated radiocarbon dates from Laguna La Zeta and Lago Theobald ………………..…………………...…………………. 106 4.3 Model selection results ……………………………………………………. 114 ix LIST OF FIGURES Figure Page 1.1 Study area and location of L. el Trébol, L. Padre Laguna, L. Huala Hué, L. Cóndor, L. Mosquito, L. La Zeta and L. Theobald .……………………..………………………………………………………... 7 2.1 Location of L. Mosquito and L. Cóndor ………………………...……...…………. 21 2.2 Age-depth model for a) L. Mosquito, and b) L. Cóndor ……..……………...…. 28 2.3 Lithologic, MS and LOI data, and sedimentation rates for the LC06A core ……..……………………...…………….……………………………... 32 2.4 a) K2O/Na2O vs SiO2 content of tephra layers (open symbols) in Lago Mosquito (MT) and L. Cóndor (CT-2) sediment cores, road-cuts in Los Alerces National Park (LAT), ashfall from the Chaitén 2008 eruption (CHA 08) and tephras from volcanoes from the study area. b) Chrondrite-normalized REE patterns for selected rhyolitic tephra samples from L. Mosquito and L. Cóndor cores and road-cuts along Los Alerces National Park ………………...……..……….……… 34 2.5 Lithology, selected pollen percentages, PAR, CHAR, background CHAR, local fire episodes and grass-to-total charcoal ratio for L. Mosquito, and L. Cóndor …………….………………..…… 38 2.6 Position of the
Load more

Recommended publications
  • The Timing, Dynamics and Palaeoclimatic Significance of Ice Sheet Deglaciation in Central Patagonia, Southern South America
    The timing, dynamics and palaeoclimatic significance of ice sheet deglaciation in central Patagonia, southern South America Jacob Martin Bendle Department of Geography Royal Holloway, University of London Thesis submitted for the degree of Doctor of Philosophy (PhD), Royal Holloway, University of London September, 2017 1 Declaration I, Jacob Martin Bendle, hereby declare that this thesis and the work presented in it are entirely my own unless otherwise stated. Chapters 3-7 of this thesis form a series of research papers, which are either published, accepted or prepared for publication. I am responsible for all data collection, analysis, and primary authorship of Chapters 3, 5, 6 and 7. For Chapter 4, I contributed datasets, and co-authored the paper, which was led by Thorndycraft. Detailed statements of contribution are given in Chapter 1 of this thesis, for each research paper. I wrote the introductory (Chapters 1 and 2), synthesis (Chapter 8) and concluding (Chapter 9) chapters of the thesis. Signed: ..................................................................................... Date:.............................. (Candidate) Signed: ..................................................................................... Date:.............................. (Supervisor) 2 Acknowledgements First and foremost, I am very grateful to my supervisors Varyl Thorndycraft, Adrian Palmer, and Ian Matthews, whose tireless support, guidance and, most of all, enthusiasm, have made this project great fun. Through their company in the field they have contributed greatly to this thesis, and provided much needed humour along the way. For always giving me the freedom to explore, but wisely guiding me when required, I am very thankful. I am indebted to my brother, Aaron Bendle, who helped me for five weeks as a field assistant in Patagonia, and who tirelessly, and without complaint, dug hundreds of sections – thank you for your hard work and great company.
    [Show full text]
  • Post-Glacial Fire History of Horsetail Fen and Human-Environment Interactions in the Teanaway Area of the Eastern Cascades, Washington
    Central Washington University ScholarWorks@CWU All Master's Theses Master's Theses Winter 2019 Post-Glacial Fire History of Horsetail Fen and Human-Environment Interactions in the Teanaway Area of the Eastern Cascades, Washington Serafina erriF Central Washington University, [email protected] Follow this and additional works at: https://digitalcommons.cwu.edu/etd Part of the Environmental Education Commons, Environmental Monitoring Commons, Natural Resources and Conservation Commons, Other Environmental Sciences Commons, and the Sustainability Commons Recommended Citation Ferri, Serafina, "Post-Glacial Fire History of Horsetail Fen and Human-Environment Interactions in the Teanaway Area of the Eastern Cascades, Washington" (2019). All Master's Theses. 1124. https://digitalcommons.cwu.edu/etd/1124 This Thesis is brought to you for free and open access by the Master's Theses at ScholarWorks@CWU. It has been accepted for inclusion in All Master's Theses by an authorized administrator of ScholarWorks@CWU. For more information, please contact [email protected]. POST-GLACIAL FIRE HISTORY OF HORSETAIL FEN AND HUMAN-ENVIRONMENT INTERACTIONS IN THE TEANAWAY AREA OF THE EASTERN CASCADES, WASHINGTON __________________________________ A Thesis Presented to The Graduate Faculty Central Washington University ___________________________________ In Partial Fulfillment of the Requirements for the Degree Master of Science Resource Management ___________________________________ by Serafina Ann Ferri February 2019 CENTRAL WASHINGTON UNIVERSITY Graduate Studies
    [Show full text]
  • 168 2Nd Issue 2015
    ISSN 0019–1043 Ice News Bulletin of the International Glaciological Society Number 168 2nd Issue 2015 Contents 2 From the Editor 25 Annals of Glaciology 56(70) 5 Recent work 25 Annals of Glaciology 57(71) 5 Chile 26 Annals of Glaciology 57(72) 5 National projects 27 Report from the New Zealand Branch 9 Northern Chile Annual Workshop, July 2015 11 Central Chile 29 Report from the Kathmandu Symposium, 13 Lake district (37–41° S) March 2015 14 Patagonia and Tierra del Fuego (41–56° S) 43 News 20 Antarctica International Glaciological Society seeks a 22 Abbreviations new Chief Editor and three new Associate 23 International Glaciological Society Chief Editors 23 Journal of Glaciology 45 Glaciological diary 25 Annals of Glaciology 56(69) 48 New members Cover picture: Khumbu Glacier, Nepal. Photograph by Morgan Gibson. EXCLUSION CLAUSE. While care is taken to provide accurate accounts and information in this Newsletter, neither the editor nor the International Glaciological Society undertakes any liability for omissions or errors. 1 From the Editor Dear IGS member It is now confirmed. The International Glacio­ be moving from using the EJ Press system to logical Society and Cambridge University a ScholarOne system (which is the one CUP Press (CUP) have joined in a partnership in uses). For a transition period, both online which CUP will take over the production and submission/review systems will run in parallel. publication of our two journals, the Journal Submissions will be two­tiered – of Glaciology and the Annals of Glaciology. ‘Papers’ and ‘Letters’. There will no longer This coincides with our journals becoming be a distinction made between ‘General’ fully Gold Open Access on 1 January 2016.
    [Show full text]
  • Impact of the 1960 Major Subduction Earthquake in Northern Patagonia (Chile, Argentina)
    ARTICLE IN PRESS Quaternary International 158 (2006) 58–71 Impact of the 1960 major subduction earthquake in Northern Patagonia (Chile, Argentina) Emmanuel Chaprona,b,Ã, Daniel Arizteguic, Sandor Mulsowd, Gustavo Villarosae, Mario Pinod, Valeria Outese, Etienne Juvignie´f, Ernesto Crivellie aRenard Centre of Marine Geology, Ghent University, Ghent, Belgium bGeological Institute, ETH Zentrum, Zu¨rich, Switzerland cInstitute F.A. Forel and Department of Geology and Paleontology, University of Geneva, Geneva, Switzerland dInstituto de Geociencias, Universidad Austral de Chile, Valdivia, Chile eCentro Regional Universitario Bariloche, Universidad Nacional del Comahue, Bariloche, Argentina fPhysical Geography,Universite´ de Lie`ge, Lie`ge, Belgium Available online 7 July 2006 Abstract The recent sedimentation processes in four contrasting lacustrine and marine basins of Northern Patagonia are documented by high- resolution seismic reflection profiling and short cores at selected sites in deep lacustrine basins. The regional correlation of the cores is provided by the combination of 137Cs dating in lakes Puyehue (Chile) and Frı´as (Argentina), and by the identification of Cordon Caulle 1921–22 and 1960 tephras in lakes Puyehue and Nahuel Huapi (Argentina) and in their catchment areas. This event stratigraphy allows correlation of the formation of striking sedimentary events in these basins with the consequences of the May–June 1960 earthquakes and the induced Cordon Caulle eruption along the Liquin˜e-Ofqui Fault Zone (LOFZ) in the Andes. While this catastrophe induced a major hyperpycnal flood deposit of ca. 3 Â 106 m3 in the proximal basin of Lago Puyehue, it only triggered an unusual organic rich layer in the proximal basin of Lago Frı´as, as well as destructive waves and a large sub-aqueous slide in the distal basin of Lago Nahuel Huapi.
    [Show full text]
  • Climate and Terrestrial Ecosystem Change in the U.S. Rocky Mountains and Upper Columbia Basin Historical and Future Perspectives for Natural Resource Management
    National Park Service U.S. Department of the Interior Natural Resource Program Center Climate and Terrestrial Ecosystem Change in the U.S. Rocky Mountains and Upper Columbia Basin Historical and Future Perspectives for Natural Resource Management Natural Resource Report NPS/GRYN/NRR—2010/260 ON THE COVER Grinnell Glacier, Glacier National Park NPS photo by Doug McMains Climate and Terrestrial Ecosystem Change in the U.S. Rocky Mountains and Upper Columbia Basin Historical and Future Perspectives for Natural Resource Management Natural Resource Report NPS/GRYN/NRR—2010/260 David B. McWethy Gregory T. Pederson Department of Earth Sciences U.S. Geological Survey Montana State University Northern Rocky Mountain Science Center Bozeman, MT 59717 Bozeman, MT 59715 Stephen T. Gray Andrea J. Ray Water Resource Data System NOAA Earth System Research Lab University of Wyoming Boulder, CO 80305 Laramie, WY 82071 Cathy Whitlock Philip E. Higuera Department of Earth Sciences Department of Forest Resources Montana State University University of Idaho Bozeman, MT 59717 Moscow, ID 83844 Jeremy S. Littell Climate Impacts Group University of Washington Seattle, WA 98195 October 2010 U.S. Department of the Interior National Park Service Natural Resource Program Center Fort Collins, Colorado ClimateTitle of andReport Ecosystem Change in the U.S. Rocky Mountains and Upper Columbia Basin Contents The National Park Service, Natural Resource Program Center publishes a range of reports that address natural resource topics of interest and applicability to a broad audience in the National Park Service and others in natu- ral resource management, including scientists, conservation and environmental constituencies, and the public. The Natural Resource Report Series is used to disseminate high-priority, current natural resource management information with managerial application.
    [Show full text]
  • Glaciological Research Project in Patagonia : Studies at Glaciar
    Bulletin of Glaciological Research,3 ( ,*++ ) ++1ῌ 1 ῌJapanese Society of Snow and Ice Glaciological Research Project in Patagonia,**0ῌ ,**3 : Studies at Glaciar Perito Moreno, Hielo Patagónico Sur, in area of Hielo Patagónico Norte, and along the Pacific Coast Masamu ANIYA+,-. , Pedro SKVARCA , Shin SUGIYAMA , Tatsuto AOKI , Takane MATSUMOTO/0 , Ryo ANMA , Nozomu NAITO 1 , Hiroyuki ENOMOTO 2 , Kazuaki HORI3 , Sebastián MARINSEK , , Keiko KONYA +* , Takayuki NUIMURA ++ , Shun TSUTAKI+, , Kenta TONE +, and Gonzalo BARCAZA +- +Professor Emeritus, University of Tsukuba, Ibaraki -*/ῌ 2/1, , Japan ,Instituto Antártico Argentino, Cerrito +,.2 , C +*+* AAZ, Buenos Aires, Argentina - Institute of Low Temperature Science, Hokkaido University, Sapporo*0*ῌ *2+3 , Japan .College of Natural Sciences, Kanazawa University, Kanazawa 3,*ῌ ++3, , Japan / Centro de Investigación en Ecosistemas de la Patagonia, Coyhaique, Chile 0 Graduate School of Life and Environmental Sciences, University of Tsukuba, Ibaraki-*/ῌ 2/1, , Japan 1 Department of Global Environment Studies, Hiroshima Institute of Technology, Hiroshima1-+ῌ /+3- , Japan 2 Department of Civil Engineering, Kitami Institute of Technology, Kitami*3*ῌ 2/*1 , Japan 3 Department of Environmental Science and Technology, Meijo University, Nagoya.02ῌ 2/*, , Japan +* Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka,-1ῌ **0+ , Japan ++ Graduate Student, Graduate School of Environmental Studies, Nagoya University, Nagoya.0.ῌ 20*+ , Japan +, Graduate Student, Graduate School of Earth Environmental Sciences, Hokkaido University, Sapporo*0*ῌ *2+* , Japan +- Dirección de Aguas, Ministerio de Obras Públicas, Santiago, Chile (Received November+2 , ,*+* ; Revised manuscript accepted February . , ,*++ ) Abstract The Glaciological Research Project in Patagonia (GRPP),**0ῌ ,**3 was carried out with several objectives at Glaciar Perito Moreno of the Hielo Patagónico Sur (HPS), in the area of the Hielo Patagónico Norte (HPN) and along the Pacific coast.
    [Show full text]
  • Dating Glacial Landforms I: Archival, Incremental, Relative Dating Techniques and Age- Equivalent Stratigraphic Markers
    TREATISE ON GEOMORPHOLOGY, 2ND EDITION. Editor: Umesh Haritashya CRYOSPHERIC GEOMORPHOLOGY: Dating Glacial Landforms I: archival, incremental, relative dating techniques and age- equivalent stratigraphic markers Bethan J. Davies1* 1Centre for Quaternary Research, Department of Geography, Royal Holloway University of London, Egham Hill, Egham, Surrey, TW20 0EX *[email protected] Manuscript Code: 40019 Abstract Combining glacial geomorphology and understanding the glacial process with geochronological tools is a powerful method for understanding past ice-mass response to climate change. These data are critical if we are to comprehend ice mass response to external drivers of change and better predict future change. This chapter covers key concepts relating to the dating of glacial landforms, including absolute and relative dating techniques, direct and indirect dating, precision and accuracy, minimum and maximum ages, and quality assurance protocols. The chapter then covers the dating of glacial landforms using archival methods (documents, paintings, topographic maps, aerial photographs, satellite images), relative stratigraphies (morphostratigraphy, Schmidt hammer dating, amino acid racemization), incremental methods that mark the passage of time (lichenometry, dendroglaciology, varve records), and age-equivalent stratigraphic markers (tephrochronology, palaeomagnetism, biostratigraphy). When used together with radiometric techniques, these methods allow glacier response to climate change to be characterized across the Quaternary, with resolutions from annual to thousands of years, and timespans applicable over the last few years, decades, centuries, millennia and millions of years. All dating strategies must take place within a geomorphological and sedimentological framework that seeks to comprehend glacier processes, depositional pathways and post-depositional processes, and dating techniques must be used with knowledge of their key assumptions, best-practice guidelines and limitations.
    [Show full text]
  • Refining the Late Quaternary Tephrochronology for Southern
    Quaternary Science Reviews 218 (2019) 137e156 Contents lists available at ScienceDirect Quaternary Science Reviews journal homepage: www.elsevier.com/locate/quascirev Refining the Late Quaternary tephrochronology for southern South America using the Laguna Potrok Aike sedimentary record * Rebecca E. Smith a, , Victoria C. Smith a, Karen Fontijn b, c, A. Catalina Gebhardt d, Stefan Wastegård e, Bernd Zolitschka f, Christian Ohlendorf f, Charles Stern g, Christoph Mayr h, i a Research Laboratory for Archaeology and the History of Art, 1 South Parks Road, University of Oxford, OX1 3TG, UK b Department of Earth Sciences, University of Oxford, OX1 3AN, UK c Department of Geosciences, Environment and Society, Universite Libre de Bruxelles, Belgium d Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, D-27568, Bremerhaven, Germany e Department of Physical Geography, Stockholm University, SE-10691 Stockholm, Sweden f University of Bremen, Institute of Geography, Geomorphology and Polar Research (GEOPOLAR), Celsiusstr. 2, D-28359, Bremen, Germany g Department of Geological Sciences, University of Colorado, Boulder, CO, 80309-0399, USA h Institute of Geography, Friedrich-Alexander-Universitat€ Erlangen-Nürnberg, Wetterkreuz 15, 91058 Erlangen, Germany i Department of Earth and Environmental Sciences & GeoBio-Center, Ludwig-Maximilians-Universitat€ München, Richard-Wagner-Str. 10, 80333 München, Germany article info abstract Article history: This paper presents a detailed record of volcanism extending back to ~80 kyr BP for southern South Received 12 March 2019 America using the sediments of Laguna Potrok Aike (ICDP expedition 5022; Potrok Aike Maar Lake Received in revised form Sediment Archive Drilling Project - PASADO). Our analysis of tephra includes the morphology of glass, the 29 May 2019 mineral componentry, the abundance of glass-shards, lithics and minerals, and the composition of glass- Accepted 2 June 2019 shards in relation to the stratigraphy.
    [Show full text]
  • Late Glacial and Holocene Paleogeographical and Paleoecological Evolution of the Seno Skyring and Otway Fjord Systems in the Magellan Region
    Anales Instituto Patagonia (Chile), 2013. 41(2):5-26 5 LATE GLACIAL AND HOLOCENE PALEOGEOGRAPHICAL AND PALEOECOLOGICAL EVOLUTION OF THE SENO SKYRING AND OTWAY FJORD SYSTEMS IN THE MAGELLAN REGION EVOLUCIÓN PALEOGEOGRÁFICA Y PALEOECOLÓGICA DEL SISTEMA DE FIORDOS DEL SENO SKYRING Y SENO OTWAY EN LA REGIÓN DE MAGALLANES DURANTE EL TARDIGLACIAL Y HOLOCENO Kilian, R.1, Baeza, O.1, Breuer, S., Ríos, F.1, Arz, H.2, Lamy, F.3, Wirtz, J.1, Baque, D.1, Korf, P.1, Kremer, K.1, Ríos, C.4, Mutschke, E.5, Simon, M.1, De Pol-Holz, R.6, Arevalo, M.7, Wörner, G.8, Schneider, C.9 & Casassa, G.10 RESUMEN Los sistemas de terrazas evidencian que el Seno Otway y Skyring y el fiordo de Última Esperanza, formaron el mayor sistema lacustre proglacial interconectado de la Patagonia Austral (5.700 km2) durante la deglaciación temprana (< 18 a 14 ka BP). Este sistema drenaba por el este del Seno Otway hacia el Atlántico. El retroceso de los glaciares desde el Canal Jerónimo alrededor de 14,0 cal kyr causó un mega evento de desagüe (320 km3), que bajó 95 metros el nivel lacustre en el Seno Otway e inició una transgresión marina, así como una intensa erosión a largo plazo de las líneas de costa que quedaron expuestas alrededor del Seno Otway. Entre 11 a 10 ka BP se produjo una transgresión marina más limitada en el sector oriental del Seno Skyring, probablemente a través del Canal Gajardo. Esto fue causado por el retroceso de los glaciares alrededor del Gran Campo Nevado (GCN) durante el Máximo Termal del Holoceno Temprano en el Hemisferio Sur (después de 12 ka BP).
    [Show full text]
  • Informe De La Subcuenca Del Río Deseado Superior Cuenca Del Río Deseado
    Informe de la subcuenca del río Deseado Superior Cuenca del río Deseado Provincia de Santa Cruz Vista panorámica de las nacientes del río Fénix Grande (Foto: L. Ferri) MINISTERIO DE AMBIENTE Y DESARROLLO SUSTENTABLE PRESIDENCIA DE LA NACIÓN Autoridad Nacional de Aplicación – Ley 26.639 – Régimen de Presupuestos Mínimos para la Preservación de los Glaciares y del Ambiente Periglacial Presidente de la Nación: Ing. Mauricio Macri Ministro de Ambiente y Desarrollo Sustentable: Rabino Sergio Bergman Unidad de Coordinación General: Dra. Patricia Holzman Secretario de Política Ambiental en Recursos Naturales: Lic. Diego Moreno Director Nacional de Gestión Ambiental del Agua y los Ecosistemas Acuáticos: Dr. Javier García Espil Coordinador de Gestión Ambiental del Agua: Dr. Leandro García Silva Responsable Programa Protección de Glaciares y Ambiente Periglacial: M.Sc. María Laila Jover IANIGLA – CONICET Inventario Nacional de Glaciares (ING) Director del IANIGLA: Dr. Fidel Roig Coordinador del ING: Ing. Gustavo Costa Director técnico: Lic. Laura Zalazar Profesional: Ing. Melisa Giménez Colaboradores: Lic. Lidia Ferri Hidalgo, Lic. Hernán Gargantini e Ing. Silvia Delgado Mayo 2018 La presente publicación se ajusta a la cartografía oficial, establecida por el PEN por ley N° 22963 -a través del IGN- y fue aprobada por expediente GG15 2241.3/5 del año 2016 Foto de portada: Manchón de nieve en las nacientes del río Fénix Grande (Foto: L. Ferri) ÍNDICE 1. Introducción .......................................................................................................................
    [Show full text]
  • Holocene Seasonal Variability Inferred from Multiple Proxy Records from Crevice Lake, Yellowstone National Park, USA
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Earth and Atmospheric Sciences, Department Papers in the Earth and Atmospheric Sciences of 2012 Holocene seasonal variability inferred from multiple proxy records from Crevice Lake, Yellowstone National Park, USA Cathy Whitlock Montana State University, [email protected] Walter E. Dean U.S. Geological Survey Sherilyn C. Fritz University of Nebraska-Lincoln, [email protected] Lora R. Stevens California State University–Long Beach, [email protected] Jeffery R. Stone University of Nebraska-Lincoln, [email protected] See next page for additional authors Follow this and additional works at: https://digitalcommons.unl.edu/geosciencefacpub Part of the Earth Sciences Commons Whitlock, Cathy; Dean, Walter E.; Fritz, Sherilyn C.; Stevens, Lora R.; Stone, Jeffery R.; Power, Mitchell J.; Rosenbaum, Joseph R.; Pierce, Kenneth L.; and Bracht-Flyr, Brandi B., "Holocene seasonal variability inferred from multiple proxy records from Crevice Lake, Yellowstone National Park, USA" (2012). Papers in the Earth and Atmospheric Sciences. 388. https://digitalcommons.unl.edu/geosciencefacpub/388 This Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Papers in the Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Authors Cathy Whitlock, Walter E. Dean, Sherilyn C. Fritz,
    [Show full text]
  • Yellowstone Science 22(1)
    EWS OTES trumpeter swans, and wolves can be N & N managed effectively only on an eco­ system scale, which generally encom­ They also authored the first chapter, passes public and private lands outside which explains the rationale and prin­ parks. Thus, effective management ciples behind ecological process man­ must link understanding of ecological agement, and the concluding chapter, process, wildlife population dynamics, in which they discuss its future “and and habitat relationships with social whether further transitions in policy and economic concerns.” may be needed.” Based on research Consequently, expectations that conducted in the Yellowstone area, the Yellowstone can be managed with a 14 intervening chapters address top­ minimum of human intervention and ics such as population dynamics and preserve conditions similar to those of interactions among species, migration the historical record “are daunting and and dispersal, the effects of exotic perhaps unattainable because ecosys­ organisms on native species, climate tems are continually changing, human Yellowstone’s Wildlife in change, vegetation phenology, and the impacts are widespread and accelerat­ Transition processes that sustain grassland and ing, and the goal of preserving natu­ riparian communities. ralness often conflicts with goals to White, P. J., R. A. Garrott, and G. E. The changes documented in preserve particularly valued species, Plumb, eds. 2013. Yellowstone’s Wildlife the book demonstrate that ecosys­ places or conditions.” Moreover, the in Transition. Harvard
    [Show full text]