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Maine's Clams Vanish as Green Crabs Invade
16 Jun
Summary
- Warming Gulf of Maine waters fuel green crab population surge.
- Green crabs are causing a sharp decline in Maine's clam populations.
- El Niño's predicted warmer winter could worsen the green crab problem.
The waters of the Gulf of Maine are warming, creating ideal conditions for a significant surge in the population of green crabs. These invasive crustaceans are posing a severe threat to softshell clams, a vital part of Maine's coastal ecosystem and economy. Green crabs feed voraciously on clams, leading to a dramatic decrease in clam populations along the entire coast.
Efforts to control the green crab population have proven unsuccessful, making coexistence challenging for both marine life and human harvesters. Historically, Maine's cold winters acted as a natural check on green crab numbers. However, milder winters, potentially influenced by El Niño, could allow more green crabs to survive and thrive, intensifying the pressure on clam beds.
The projected warmer and wetter conditions for Maine in 2026, influenced by El Niño, could have a range of impacts beyond green crabs. Invasive seaweeds that thrive in warmer waters can clog aquaculture nets and create oxygen-deprived zones, further harming marine life. While some effects of El Niño might benefit clams, such as increased nutrients from rainfall, the overall trend points towards a challenging future for Maine's shellfish industry.
