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# Retention patches protect some habitat while creating new forest edges
- URL: https://intelligence.wildlandseco.com/2026-10-17-aggregated-forest-retention-edge-tradeoffs/
- Published: 2026-10-17T14:05:37.000Z
- Updated: 2026-10-17T14:05:37.000Z
- Description: A landscape model quantifies why the geometry of retained forest matters as well as the retained percentage.
- Author: Benjamin Worlund
- Tags: forest retention, edge effects, landscape design, Land, Wildlife, Methods, #ecological-intelligence, #brief-2026-10-17, #priority-read, #peer-reviewed, #geo-north-america

Evidence

Peer-reviewed

Geography

Modeled managed forest landscapes, North America

System

Forest harvesting; aggregate retention; edge effects

## WHAT THE EVIDENCE SAYS

Researchers used approximately 105,000 simulated managed-landscape configurations to examine aggregated retention under fixed harvested-area assumptions. The simulations found that placing 20 percent of harvested stands into retention could increase the area influenced by forest edges by roughly four to 30 percent per harvested area, depending on the chosen edge-distance definition.

## WHY IT MATTERS / OUR READ

Keeping live forest inside a working landscape has value, but a stand-level retention percentage is not a landscape design. Patch shapes, connected cores and exposure of neighboring stands can materially change which ecological conditions remain.

## CAVEATS / UNCERTAINTY

These are geometric model outcomes, not measured wildlife, carbon or forest-growth responses. Edge-effect distances and harvesting assumptions determine the estimates; no universal prescription follows from this calculation.

## SOURCE

Landscape Ecology · forest retention and edge-modeling study  
[View original evidence ↗](https://doi.org/10.1007/s10980-026-02398-9?ref=intelligence.wildlandseco.com)

From the Morning Brief · 2026-10-17

[Read the full Morning Brief →](https://intelligence.wildlandseco.com/morning-brief-2026-10-17/)