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The Status and Distribution of Freshwater Biodiversity in the Eastern Himalaya

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The Status and Distribution of Freshwater Biodiversity in the Eastern Himalaya THE S THE STATUS AND DISTRIBUTION T A OF FRESHWATER BIODIVERSITY T U S IN THE EASTERN HIMALAYA AND D.J. Allen, S. Molur and B.A. Daniel (Compilers) D I S T R IBU T I ON OF F R E S H WA T E R B I ODIVER S I T Y I N T H E E A S T IN TERNATIONAL UNION FOR CONSERVATION OF NATURE HIMALAYA EASTERN E RN WORLD HEADQUARTERS Rue Mauverney 28 H 1196 Gland I Switzerland MALAYA Tel: + 41 22 999 0000 Fax: + 41 22 999 0020 www.iucn.org/species www.iucnredlist.org The IUCN Red List of Threatened SpeciesTM Supported by A Ubout I CN IU CN Red List of Threatened Species™ – Regional Assessment Projects IUCN, International Union for Conservation of Nature, helps the world find pragmatic solutions to our most pressing environment and development Africa challenges. The Status and Distribution of Freshwater Biodiversity in Eastern Africa. Compiled by William R.T. Darwall, Kevin IUCN works on biodiversity, climate change, energy, human livelihoods and greening the world economy by supporting scientific research, managing G. Smith, Thomas Lowe, Jean-Christophe Vié, 2005. field projects all over the world, and bringing governments, NGOs, the UN and companies together to develop policy, laws and best practice. The Status and Distribution of Freshwater Biodiversity in Southern Africa. Compiled by William R.T. Darwall, IUCN is the world’s oldest and largest global environmental organization, Kevin G. Smith, Denis Tweddle and Paul Skelton, 2009. with more than 1,000 government and NGO members and almost 11,000 volunteer experts in some 160 countries. IUCN’s work is supported by over The Status and Distribution of Freshwater Biodiversity in Western Africa. Compiled by Smith, K.G., Diop, M.D., 1,000 staff in 60 offices and hundreds of partners in the public, NGO and private sectors around the world. Niane, M. and Darwall, W.R.T. 2009. www.iucn.org The Status and Distribution of Freshwater Biodiversity in Northern Africa. Compiled by N. Garcia, A Cuttelod, and D. Abdul Malak. 2010. IUCN – The Species Survival Commission The Status and Distribution of Freshwater Biodiversity in Central Africa. Compiled by Emma G.E. Brooks, David The Species Survival Commission (SSC) is the largest of IUCN’s six J. Allen and Darwall, W.T. 2010. volunteer commissions with a global membership of 7,000 experts. SSC advises IUCN and its members on the wide range of technical and scientific aspects of species conservation and is dedicated to securing a future for biodiversity. SSC has significant input into the international agreements Mediterranean dealing with biodiversity conservation. The Status and Distribution of Freshwater Fish Endemic to the Mediterranean Basin. Compiled by Kevin G. www.iucn.org/themes/ssc Smith and William R.T. Darwall, 2006. The Status and Distribution of Reptiles and Amphibians of the Mediterranean Basin. Compiled by Neil Cox, IUCN – Species Programme Janice Chanson and Simon Stuart, 2006. The IUCN Species Programme supports the activities of the IUCN Species Survival Commission and individual Specialist Groups, as well Overview of the Cartilaginous Fishes (Chondrichthyans) in the Mediterranean Sea. Compiled by Rachel D. as implementing global species conservation initiatives. It is an integral part of the IUCN Secretariat and is managed from IUCN’s international Cavanagh and Claudine Gibson, 2007. headquarters in Gland, Switzerland. The Species Programme includes a number of technical units covering Species Trade and Use, the IUCN Red The Status and Distribution of Dragonflies of the Mediterranean Basin.Compiled by Elisa Riservato, Jean-Pierre List Unit, Freshwater Biodiversity Unit (all located in Cambridge, UK), the Global Biodiversity Assessment Initiative (located in Washington DC, USA) Boudot, Sonia Ferreira, Milos Jovi c´ , Vincent J. Kalkman, Wolfgang Schneider and Boudjema Samraoui, 2009. and the Marine Biodiversity Unit (located in Norfolk, Virginia, USA). The Status and Distribution of Mediterranean Mammals. Compiled by Helen J, Temple and Annabelle www.iucn.org/species Cuttelod, 2009. Europe The Status and Distribution of European Mammals. Compiled by Helen J. Temple and Andrew Terry, 2007. European Red List of Amphibians. Compiled by Helen J. Temple and Neil Cox, 2009. European Red List of Reptiles. Compiled by Neil Cox and Helen J. Temple, 2009. European Red List of Saproxylic Beetles. Compiled by Ana Nieto and Keith N.A. Alexander, 2010. European Red List of Butterflies.Compiled by Chris van Swaay, Annabelle Cuttelod, Sue Collins, Dirk Maes, Miguel Lopez Munguira, Martina Šaši c´ , Josef Settele, Rudi Verovnik, Theo Verstrael, Martin Warren, Martin Wiemers and Irma Wynhoff, 2010. European Red List of Dragonflies.Compiled by Vincent J. Kalkman, Jean-Pierre Boudot, Rafał Bernard, Klaus- Jurgen Conze, Geert De Knijf, Elena Dyatlova, Sonia Ferreira, Miloš Jovi c´ , Jurgen Ott, Elisa Riservato and Goran Sahlen, 2010. THE STATUS AND DISTRIBUTION OF FRESHWATER BIODIVERSITY IN THE EASTERN HIMALAYA D.J. Allen, S. Molur and B.A. Daniel (Compilers) The designation of geographical entities in this book, and the presentation of material, do not imply the expression of any opinion whatsoever on the part of IUCN or other participating organizations, concerning the legal status of any country, territory, or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. The views expressed in this publication do not necessarily reflect those of IUCN or other participating organizations. Published by: IUCN, Cambridge, UK and Gland, Switzerland. Copyright: © 2010 International Union for Conservation of Nature and Natural Resources Reproduction of this publication for educational or other non-commercial purposes is authorized without prior written permission from the copyright holder provided the source is fully acknowledged. Reproduction of this publication for resale or other commercial purposes is prohibited without prior written permission of the copyright holder. Red List logo: © 2008 Citation: Allen, D.J., Molur, S., Daniel, B.A. (Compilers). 2010. The Status and Distribution of Freshwater Biodiversity in the Eastern Himalaya. Cambridge, UK and Gland, Switzerland: IUCN, and Coimbatore, India: Zoo Outreach Organisation. ISBN: 978-2-8317-1324-3 Cover design: NatureBureau Cover photo: © Oliver Crimmen. Fish market in Loikaw, Kayah State, Myanmar, just outside the Eastern Himalayas project area. Note the abundance in the catch of introduced Tilapia species. All photographs used in this publication remain the property of the original copyright holder (see individual captions for details). Photographs should not be reproduced or used in other contexts without written permission from the copyright holder. Layout by: NatureBureau, Newbury, UK Produced by: NatureBureau, Newbury, UK Printed by: Information Press, Oxford, UK Available from: IUCN (International Union for Conservation of Nature), Publications Services, 28 Rue Mauverney, 1196 Gland, Switzerland, Tel: + 41 22 999 0000, Fax: + 44 22 999 0020, Email: [email protected], www.iucn.org/publications A catalogue of IUCN publications is also available at www.iucn.org/publications. The text of this book is printed on 115 gsm Revive 50:50 Silk ii Contents Acknowledgments ..........................................................................................................................................................................................................vi Executive Summary ...................................................................................................................................................................................................... vii 1. Background ................................................................................................................................................................................................................3 1.1 Value of freshwater biodiversity ...........................................................................................................................................................................3 1.2 Global status of freshwater biodiversity .............................................................................................................................................................4 1.2.1 Species diversity .............................................................................................................................................................................................4 1.2.2 Major threats to freshwater biodiversity .................................................................................................................................................5 1.2.3 Species threatened status .............................................................................................................................................................................5 1.3 Situation analysis for the Eastern Himalaya region ........................................................................................................................................6 1.3.1 Regional threats .............................................................................................................................................................................................7 1.3.2 Regional use and value of wetlands and their biodiversity ............................................................................................................... 10 1.4 The precautionary approach to species conservation ..................................................................................................................................
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