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Ecological Intelligence / Subject

mangrove carbon

Peer-reviewed Asia

Three Philippine mangrove stands told different stories about biodiversity and carbon

Evidence
Peer-reviewed
Geography
Talabaan, Victoria and Great Sta. Cruz Island, Zamboanga City, Philippines
System
Mangrove forests; species composition; aboveground biomass and carbon stocks

WHAT THE EVIDENCE SAYS

Field surveys across three mangrove stands and 72 quadrats identified 15 mangrove species, with Rhizophora taxa common. Diversity varied among sites, and the mature Great Sta. Cruz Island stand had the highest estimated aboveground carbon stock at 41.61 tonnes of carbon per hectare. Reforested sites contributed vegetation cover but did not show identical measured diversity or estimated carbon levels.

WHY IT MATTERS / OUR READ

Restoration projects need metrics beyond planting area. Stand age, species composition, biomass and the hydrologic setting all matter when comparing planted mangroves with protected natural stands; sampling can reveal tradeoffs hidden by a satellite-green coastline.

CAVEATS / UNCERTAINTY

These are snapshots of three sites, not a controlled before-after comparison or whole-ecosystem carbon budget. Estimates are aboveground biomass carbon, not demonstrated rates of sequestration or storm-protection performance.

SOURCE

Epan et al. · Biodiversitas · Zamboanga mangrove field assessment
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Zamboanga field plots separate surviving mature forest condition from tree-cover restoration activity.

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Mangrove carbon increased along a seaward chronosequence—but total-stock differences were not statistically clear

Evidence
Peer-reviewed chronosequence field study
Geography
Southern China
System
Seaward-expanding mangrove forest

WHAT THE EVIDENCE SAYS

Across a seaward-expanding mangrove chronosequence, mean ecosystem carbon stocks increased from younger to older stands, while depth profiles and labile carbon fractions also shifted. The reported total carbon-stock differences among age classes, however, were not statistically significant.

WHY IT MATTERS / OUR READ

Carbon accumulation can change internally before a headline stock estimate separates cleanly among stand ages. Monitoring only total carbon may miss changes in where carbon is stored and how stable or labile those pools are.

CAVEATS / UNCERTAINTY

Chronosequences substitute space for time, and the work represents one mangrove setting. Sample size and local sediment dynamics limit generalization; higher mean carbon in older stands is not evidence that every planted or expanding mangrove will follow the same trajectory.

SOURCE

Fundamental Research
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A southern China chronosequence showed older mangrove stands with higher mean carbon stocks and changing carbon fractions, while total-stock differences among ages remained statistically uncertain.

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