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# Amazon mangrove soil function declined beyond the tree-cover map
- URL: https://intelligence.wildlandseco.com/2026-10-30-amazon-mangrove-soil-function-index-land-conversion/
- Published: 2026-10-30T13:27:32.000Z
- Updated: 2026-10-30T13:27:32.000Z
- Description: A site-specific index detected substantial differences between intact, adjacent and converted landscapes.
- Author: Benjamin Worlund
- Tags: amazon-mangrove, soil-function, land-conversion, Oceans, Land, Methods, #ecological-intelligence, #brief-2026-10-30, #global-radar, #peer-reviewed, #geo-latin-america-caribbean

Evidence

Peer-reviewed

Geography

Brazilian Amazon mangrove coast

System

Mangrove soils; aquaculture; biological functions

## WHAT THE EVIDENCE SAYS

A field study built a locally calibrated soil-health index comparing four land-use settings. Intact mangroves and mangroves neighboring shrimp farms scored 67% and 64% of the study's reference capacity, while converted shrimp-farm and pasture sites scored 52% and 32%. Detecting subtle neighboring degradation required more indicators than detecting severe conversion.

## WHY IT MATTERS / OUR READ

Belowground functions can change before mapped forest cover does. Managers should select monitoring indicators and reference states matched to local ecosystem processes.

## CAVEATS / UNCERTAINTY

These percentages are relative to this study's own indicator framework, not worldwide service-loss estimates or a universally validated mangrove-health scale.

## SOURCE

Wetlands — Mello et al., 26 June 2026  
[View original evidence ↗](https://doi.org/10.1007/s13157-026-02085-0?ref=intelligence.wildlandseco.com)

From the Morning Brief · 2026-10-30

[Read the full Morning Brief →](https://intelligence.wildlandseco.com/morning-brief-2026-10-30/)