Habitat Split Reduces Frogs' Natural Defense Against Deadly Fungus
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A new study finds frogs living in fragmented habitats host fewer skin microbes that fight a deadly fungal pathogen. This 'habitat split'—where forests and water sources are separated by human activity—is linked to localized frog extinctions in Brazil's Atlantic Forest.
Facts First
- Frogs in fragmented habitats have fewer protective skin microbes than those in connected landscapes.
- Habitat split, caused by activities like agriculture, separates forests from aquatic habitats.
- The fungus Batrachochytrium dendrobatidis (chytrid) has caused global amphibian declines.
- The study examined four frog species in Brazil's Atlantic Forest.
- Habitat split is a known driver of localized frog extinctions in the region.
What Happened
A study investigated the effect of 'habitat split' on the skin microbiome of four frog species in Brazil's Atlantic Forest. Habitat split occurs when human activities separate aquatic and terrestrial habitats. Frogs living in areas where these habitats are linked host more skin microbes that inhibit the fungal pathogen Batrachochytrium dendrobatidis (chytrid). Frogs in areas where habitats were split hosted fewer of these pathogen-fighting microbes.
Why this Matters to You
This research may help conservation efforts by identifying a specific mechanism—the loss of protective microbes—that makes frogs more vulnerable to disease in fragmented landscapes. Protecting or restoring habitat connectivity could be a strategy to bolster natural defenses against chytrid, a fungus responsible for large-scale declines of hundreds of amphibian species globally.
What's Next
The findings could inform land-use planning and conservation strategies aimed at mitigating habitat fragmentation. Further research may explore whether restoring habitat links can help rebuild protective microbial communities on frog skin.