The changing hydro-ecological dynamics of rivers and deltas of the Western Indian Ocean: Anthropogenic and environmental drivers, local adaptation and policy response

Duvail, Stéphanie; Hamerlynck, Olivier; Paron, Paolo; Hervé, Dominique; Nyingi, Wanja Dorothy; Leone, Michele

doi:10.1016/j.crte.2017.09.004

Cited by 16 publications

(19 citation statements)

References 43 publications

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“…Tanzania's NAWAPO and WRM Act provide the legal provisions for assessment and implementation of environmental flows, and there is high national capacity for flow-ecology research among Tanzanian scientists. Nevertheless, there is opportunity for expanding environmental flow assessments to include greater consideration of social relations and increased public participation, and to move beyond the current focus on securing only minimum flows [10,47]. These advances are in line with the revised Brisbane Declaration and Global Action Agenda on environmental flows, which recognized that social and cultural dimensions of environmental flow management warrant far more attention [45].…”

Section: Recommendations For Future Effortsmentioning

confidence: 96%

“…Downstream, the deltas of many Eastern Arc-origin rivers-notably the Rufiji and Ruvuma-are recognised as areas of ecological and social importance in the Western Indian Ocean. These rivers export high loads of sediments from Eastern Arc Mountain blocks, which form and maintain floodplain areas in lower gradient parts of their basins near the Indian Ocean coastline, in combination with tidal influences [10]. Connecting the mainland to the coast, riverine floodplains, and deltas contain nursery areas for aquatic biota, act as sinks for carbon, offer defence against storms, and provide innumerable ecosystem services to human populations [10,11].…”

Section: Framework For River Conservation and Managementmentioning

confidence: 99%

“…The dam will be located on the Rufiji River within the Selous Game Reserve, a popular tourist destination and a UNESCO World Heritage site [70]. Construction of the dam will require clearing 2.6 million trees to inundate 1200 sq km of land that includes habitat for black rhinoceroses, elephants, and other species, while threatening the livelihoods of tens of thousands of downstream users who depend on the naturally dynamic flooding regimes of the Rufiji for agriculture and fisheries [10,66,71].…”

Section: River Alterations and Damsmentioning

confidence: 99%

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Conserving Rivers and Their Biodiversity in Tanzania

Seeteram

Hyera²,

Kaaya

et al. 2019

Water

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The United Republic of Tanzania (Tanzania) is rich in freshwater resources and biodiversity. In this article, we highlight the importance of Tanzanian rivers and make a case for the conservation of the freshwater and terrestrial species that rely on these rivers. We provide an overview of current knowledge on Tanzanian rivers and discuss progress towards implementation of the National Water Policy (2002) and Water Management Act (2009), two legislative instruments that have motivated environmental flow assessments on at least six major rivers and offer legal backing for river conservation. We examine major challenges that pose significant threats to water security for river ecosystems and humans in Tanzania, among those: (1) human population growth, (2) agricultural expansion, (3) river flow alterations, (4) industrialization, (5) introduced species, and (6) climate change. We conclude by offering recommendations for future river conservation efforts in Tanzania.

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Section: Recommendations For Future Effortsmentioning

confidence: 96%

Section: Framework For River Conservation and Managementmentioning

confidence: 99%

Section: River Alterations and Damsmentioning

confidence: 99%

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Conserving Rivers and Their Biodiversity in Tanzania

Seeteram

Hyera²,

Kaaya

et al. 2019

Water

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“…The Ruvuma and Tana Rivers also have much smaller but important deltas. The mangroves in the estuaries of western Madagascar share the same characteristics (Duvail et al 2017).…”

Section: Deltaic Fish-based Farming Subsystemmentioning

confidence: 99%

Farming Systems and Food Security in Africa

2019

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Knowledge of Africa's complex farming systems, set in their socio-economic and environmental context, is an essential ingredient to developing effective strategies for improving food and nutrition security.This book systematically and comprehensively describes the characteristics, trends, drivers of change and strategic priorities for each of Africa's fifteen farming systems and their main subsystems. It shows how a farming systems perspective can be used to identify pathways to household food security and poverty reduction, and how strategic interventions may need to differ from one farming system to another. In the analysis, emphasis is placed on understanding farming systems drivers of change, trends and strategic priorities for science and policy.Illustrated with full-colour maps and photographs throughout, the volume provides a comprehensive and insightful analysis of Africa's farming systems and pathways for the future to improve food and nutrition security. The book is an essential follow-up to the seminal work Farming Systems and Poverty by Dixon and colleagues for the Food and Agriculture Organization (FAO) of the United Nations and the World Bank, published in 2001.

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“…Despite long-standing environmental and social concerns (Hoag and Ohman, 2008;Duvail et al, 2014), construction of the Magufuli mega-dam project began in July 2019 on the Rufiji River at Stiegler's Gorge, in the Selous Game Reserve. Given inadequate plans for managed water release, impacts on downstream ecosystems and communities may be severe, and compounded by climate change, deforestation, and other drivers of change (Duvail et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Trading Fast and Slow: Fish Marketing Networks Provide Flexible Livelihood Opportunities on an East African Floodplain

Moreau

Garaway

2021

Front. Sustain. Food Syst.

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Domestic marketing networks in inland small-scale fisheries (SSF) provide food and income to millions of the rural poor globally. Yet these contributions remain undervalued, as most trade is informal and unmonitored, and inland fisheries overlooked in research and policy. Taking a commodity chain approach, we provide a case study of access arrangements governing how people come to enter and benefit from the freshwater fish trade on Tanzania's Rufiji River floodplain. We conducted a repeat market survey, interviews, and participant observation with actors at all levels of the district trade over 15 months. Gender, age, and social capital structured participation patterns, with younger men dominating the more lucrative but riskier fresh trade, older men prioritizing steady income from smoked fish, and women culturally constrained to selling a “cooked” product (i.e., fried fish). Nearly all participants were local, with traders drawing on a complex web of relationships to secure supplies. The majority of market vendors cited the trade as their household's most important income source, with women's earnings and consumption of unsold fish likely to have substantial benefits for children's well-being. Our findings reveal a resilient and pro-poor trade system where, starting with small initial investments, people overcame considerable environmental, financial, regulatory, and infrastructural challenges to reliably deliver fish to rural and urban consumers. Preserving the ecological integrity of Rufiji wetlands in the face of hydro-power development and climate change should be a priority to safeguard the livelihoods and well-being of local inhabitants.

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The changing hydro-ecological dynamics of rivers and deltas of the Western Indian Ocean: Anthropogenic and environmental drivers, local adaptation and policy response

Cited by 16 publications

References 43 publications

Conserving Rivers and Their Biodiversity in Tanzania

Conserving Rivers and Their Biodiversity in Tanzania

Farming Systems and Food Security in Africa

Trading Fast and Slow: Fish Marketing Networks Provide Flexible Livelihood Opportunities on an East African Floodplain

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