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Silent Invasion: 200% Rise in Non-Native Molluscs in Brazil
2 Jul
Summary
- Non-native mollusc species in Brazil surged over 200% in just 15 years.
- Foreign species now include diverse groups like cephalopods and chitons.
- Invasive molluscs pose economic threats, clogging infrastructure and damaging crops.
Brazil's extensive river systems and coastal bays are facing a significant ecological disruption due to an alarming increase in non-native mollusc species. Recent studies reveal that the number of documented foreign mollusc species has exploded by over 200% in the past fifteen years, escalating from 26 to 82 distinct species.
This rapid biological takeover now encompasses a wider array of marine life, including not only gastropods and bivalves but also, for the first time, chitons and cephalopods. These adaptable invaders are establishing themselves in various environments, from inland agricultural canals to coastal ports.
The economic consequences are already substantial. Invasive species like the golden mussel cause millions in damages by encrusting and blocking essential infrastructure, such as hydroelectric power plant water intake pipes. In agricultural areas, foreign species like the Asian mantleslug are devastating valuable crops, impacting food production systems.
Scientists emphasize the need for enhanced environmental biosecurity measures, including improved early detection, stricter shipping regulations, and collaborative monitoring programs. These actions are crucial to manage the accelerating pace of biological introductions and mitigate future ecological and economic burdens.
