Kelp Forest Ecosystems and the Welfare of Fish and Invertebrates Within Them

Kelp forests are among the most biodiverse marine ecosystems. The welfare of the animals within them is shaped by ecosystem health, predation and human impacts.

Key Facts

Kelp forests support hundreds of species including fish, sea urchins, sea otters, seals and seabirds.
Sea otter predation on urchins is crucial for preventing urchin barrens that replace healthy kelp.
Climate change and marine heatwaves have caused widespread kelp forest collapse globally.
Animals in degraded kelp forests face food scarcity, increased predation risk and habitat loss.
Recreational and commercial fishing directly affects population dynamics within kelp ecosystems.
Restoration projects replanting kelp canopy have shown promising recovery in some regions.

Welfare Considerations

Wild animal welfare in kelp forests is mediated by ecosystem dynamics. When kelp cover declines, fish lose shelter from predators, increasing chronic stress and injury rates. Urchin population explosions following otter decline create barren seafloors where few animals can thrive. Restoring keystone species and reducing eutrophication and sedimentation from land runoff improves conditions for the billions of animals that depend on kelp habitat. Conservation of these ecosystems is therefore simultaneously a welfare and biodiversity intervention.

What You Can Do

Support marine protected areas that include kelp forest habitat.
Advocate for sea otter reintroduction in regions where they have been lost.
Reduce nutrient runoff from your property by limiting fertiliser use near waterways.
Choose sustainably sourced seafood to reduce fishing pressure on kelp ecosystem species.
Donate to kelp restoration projects working to replant degraded coastal areas.