Rats drove out seabirds, reshaping an entire reef food chain
A new study reveals that invasive rats on tropical islands are decimating seabird populations, which in turn disrupts the nutrient cycle for surrounding coral reefs. This ecological shift alters the food chain, favoring small invertebrates over specific fish species.
Why it matters
Understanding these interconnected ecosystems is vital for conservation efforts, as invasive species can have cascading effects on marine biodiversity far beyond the islands themselves.
Ecosystems work with each other no matter how far or disconnected they are. Animals and birds have impacts on each other's lives and deaths. According to a new study, invasive rats on tropical islands are creating winners and losers among tiny underwater animals near the bottom of the food chain that inhabit surrounding coral reefs. Now, scientists are saying the resultant changes can rewire food chains on the reefs.Tiny fish and invertebrates that live at the bottom of the sea on coral reefs are known collectively as 'cryptofauna'.
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