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# The Florida Keys lost sponges—and several functions with them
- URL: https://intelligence.wildlandseco.com/2026-10-30-florida-keys-sponge-decline-ecosystem-function/
- Published: 2026-10-30T13:27:23.000Z
- Updated: 2026-10-30T13:27:23.000Z
- Description: Hardbottom comparisons connect depleted sponge habitat with changed soundscape, bottom conditions and filtration.
- Author: Benjamin Worlund
- Tags: sponge-decline, seafloor-function, florida-keys, Oceans, Wildlife, Climate, #ecological-intelligence, #brief-2026-10-30, #priority-read, #peer-reviewed, #geo-north-america

Evidence

Peer-reviewed

Geography

Florida Keys, Florida, USA

System

Marine hardbottom; sponge communities; filtration

## WHAT THE EVIDENCE SAYS

Comparing Florida Keys hardbottom surveys from 2002 through 2018, researchers report 66% lower sponge abundance and 34% lower species diversity; declines also occurred outside documented lethal cyanobacterial blooms. Additional site surveys and experiments implicate lost sponge function in filtration, settlement substrates, underwater sound and changing sediment conditions.

## WHY IT MATTERS / OUR READ

The mapped seafloor habitat can retain its category after the organisms that make it function have declined. Monitoring should test water filtration, larval settlement, acoustic conditions and substrate rather than stop at habitat cover.

## CAVEATS / UNCERTAINTY

Some functions are inferred through separate experiments or extrapolations, not measured as a long historical time series. Multiple coastal pressures prohibit attributing all change to one cause.

## SOURCE

Frontiers in Marine Science — Butler, 30 October 2026  
[View original evidence ↗](https://doi.org/10.3389/fmars.2026.1891588?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/)