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Ecological Intelligence

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Ecological Intelligence / Subject

Livelihoods

Gambia’s oyster fishery is an ecological system, a women’s livelihood and a governance system at the same time

Evidence
Peer-reviewed
Geography
Tanbi Wetland Complex and Foni Bullock, The Gambia
System
Mangrove–oyster fishery

WHAT THE EVIDENCE SAYS

A qualitative case study interviewed 60 female oyster harvesters and conducted two focus groups across an urban and rural harvesting system. Participants described detailed ecological knowledge of tides, seasons, oyster availability and mangrove condition, mostly transmitted through families. They also reported increasing harvesting pressure and declining oyster abundance alongside growing use of seasonal closures, restrictions and collective monitoring as commercialization expanded.

WHY IT MATTERS / OUR READ

The study is useful because it treats ecological condition, knowledge, markets and institutions as one system rather than separate problems. For conservation practice, stronger rules without attention to women’s livelihood strategies, local knowledge and market access can miss the mechanisms that actually determine harvesting behavior.

CAVEATS / UNCERTAINTY

Declining oyster abundance is participant-reported rather than an independent ecological abundance trend, and the evidence comes from two sites and a qualitative sample. The findings support social-ecological interpretation, not a basin-wide estimate of stock condition or governance effectiveness.

SOURCE

Journal of Ethnobiology and Ethnomedicine — qualitative case study
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Interviews with 60 female oyster harvesters show how tidal knowledge, family-transmitted practice, commercialization and formal closures are interacting inside two mangrove–oyster social-ecological systems.

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Bonga’s charcoal supply chain translated into measurable forest loss and emissions

Evidence
Peer-reviewed
Geography
Kafa Biosphere Reserve / Bonga, southwestern Ethiopia
System
Tropical forest / forest-energy supply chain

WHAT THE EVIDENCE SAYS

A 2020 study combining household surveys, interviews and daily charcoal-supply monitoring estimated that Bonga Town consumed roughly 5,449 tonnes of charcoal per year, requiring about 27,244 tonnes of dry wood and affecting an estimated 895 hectares; two of the three most preferred tree species were endemic.

WHY IT MATTERS / OUR READ

Energy demand can be translated into landscape exposure when supply-chain quantities, species preferences and conversion assumptions are made explicit, creating a stronger basis for targeted forest and livelihood interventions.

CAVEATS / UNCERTAINTY

The estimates come from one town and depend on wood-to-charcoal, tree and area conversion assumptions. They should not be extrapolated to the whole biosphere reserve or nationally without additional supply-chain data.

SOURCE

Discover Sustainability
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EvidencePeer-reviewedGeographyKafa Biosphere Reserve / Bonga, southwestern EthiopiaSystemTropical forest / forest-energy supply chain WHAT THE EVIDENCE SAYS A 2020 study combining household surveys, interviews and daily charcoal-supply monitoring estimated that

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