海藻力量：释放坦桑尼亚可持续增长和气候行动的潜力（英）2025

UNLOCKING TANZANIA’SPOTENTIAL FOR SUSTAINABLEGROWTH AND CLIMATE ACTIONPublic Disclosure Authorized Copy right©2025 International Bank for Reconstruction and Development / The World Bank1818 H Street NWWashington DC 20433Telephone: 202-473-1000 Internet: www.worldbank.org This work is a product of the staff of The World Bank with external contributions. The findings,interpretations, and conclusions expressed in this work do not necessarily reflect the views ofThe World Bank, its Board of Executive Directors, or the governments they represent. The World Bank does not guarantee the accuracy, completeness, or currency of the data included in this work anddoes not assume responsibility for any errors, omissions, or discrepancies in the information, or liability with respectto the use of or failure to use the information, methods, processes, or conclusions set forth. The boundaries, colors,denominations, and other information shown on any map in this work do not imply any judgment on the part of TheWorld Bank concerning the legal status of any territory or the endorsement or acceptance of such boundaries. Nothing herein shall constitute or be construed or considered to be a limitation upon or waiver ofthe privileges and immunities of The World Bank, all of which are specifically reserved. Rights and Permissions The material in this work is subject to copyright. Because The World Bank encourages dissemination of its knowledge, thiswork may be reproduced, in whole or in part, for noncommercial purposes as long as full attribution to this work is given. Any queries on rights and licenses, including subsidiary rights, should be addressed to World Bank Publications, The WorldBank Group, 1818 H Street NW, Washington, DC 20433, USA; fax: 202-522-2625; e-mail: pubrights@worldbank.org. Cover photo: © Vecteezy. Used with the permission of Vecteezy. Further permission required for reuse. Publication photos: © Revolutionary Government of Zanzibar and Vecteezy. Used with the permissionof Revolutionary Government of Zanzibar and Vecteezy. Further permission required for reuse. Cover design: Mariaan van Zyl SEAWEED POWER UNLOCKING TANZANIA’SPOTENTIAL FOR SUSTAINABLEGROWTH AND CLIMATE ACTION ACKNOWLEDGMENTS This report was prepared by Harshit Gupta (International Value Chain Expert) and Flower E. Msuya (NationalConsultant), under the supervision of Ernest Ruzindaza (Senior Agriculture Economist) and Mirko Serkovic (SeniorEnvironmental Specialist) from the World Bank office in Tanzania. The report benefited from contributions from the Ministry of Livestock and Fisheries (Tanzania Mainland), the Ministryof Blue Economy and Fisheries (Zanzibar), the Ministry of Trade and Industrial Development (Zanzibar), as well asvarious stakeholders involved in the seaweed sector from academia, non-governmental organizations, and the privatesector. The team would also like to thank colleagues who provided valuable input and guidance, including Christopher Ian Brett(Lead Agribusiness Specialist), Emma Isinika Modamba (Senior Agriculture Economist), Francisco Obreque (Lead RuralDevelopment Specialist), Frauke Jungbluth (Practice Manager), Harrison Charo Karisa (Senior Fisheries Specialist),Isabel Saldarriaga Arango (External Affairs Officer), Milena Stefanova (Operations Manager), Nathan Belete (DivisionDirector), Robert Peck (Senior Operations Officer, IFC), and Sarah Ruth Ochieng (Operations Officer, IFC). The teamextends its special appreciation to Clarity Global (editing) and Mariaan Zyl (Graphic Designer). This publication was made possible thanks to the PROBLUE Multi-Donor Trust Fund. EXECUTIVESUMMARY EXECUTIVE SUMMARY This report provides an analysis of the seaweed sector in Tanzania, examining its historical evolution, currentdynamics, and vast potential to drive sustainable economic growth, climate resilience, and socioeconomicdevelopment. Introduced in 1989, seaweed farming now supportsaround 30,000 farmers in Tanzania, 80percent ofwhom are women. The sector primarily cultivatesEucheuma denticulatum(spinosum) andKappaphycusalvarezii(cottonii). These species are used to producecarrageenan, an additive used to thicken, emulsify, andstabilize foods and drinks. In Tanzania, production peakedat 17,900 metric tons (MT) in 2015 and fell to 11,223 MT in2020 primarily due to challenges such as climate change.Production rebounded to 25,426 MT in 2023. The sectorgenerates over $6million in annual export revenue, but itprimarily relies on raw seaweed exports. Despite emergingvalue-addition initiatives, only 1percent of seaweed isprocessed domestically, limiting the sector’s potential forhigher-value market entry. Tanzania’s raw seaweed sells for an average of $386 perMT, significantly lower than the $1,236 per MT in Malaysiaand $3,000 per MT in Taiwan. Coordination mechanisms within the sector remainfragmented, but emerging initiatives highlight thepotential for transformative governance. There is no dedicated seaweed indust