How much plastic is too much for marine birds, mammals, turtles?, Pg14

Key Highlights:

• A study of over 10,000 necropsies found that 35% of seabirds, 12% of marine mammals, and 47% of sea turtles had ingested plastic.
• Ingested plastic led to death in 1.6% of seabirds, 0.7% of marine mammals, and 4.4% of sea turtles.
• Ingesting 6 to 405 pieces of macroplastic leads to a 90% mortality rate in marine species.
• Rubber is most fatal for seabirds, soft plastics and fishing debris for marine mammals, and hard and soft plastics for sea turtles.

Detailed Insights:

• The study analyzed data from 57 sources to quantify the impact of plastic ingestion on marine animals' gastrointestinal tracts.
• Common marine mammal victims include the striped dolphin, sperm whale, South American fur seal, and Florida manatee.
• Among birds, the albatross, gull, and tern are frequently affected, along with all seven species of sea turtles.
• Sea turtles face the highest risk, with nearly 50% of samples showing plastic ingestion, followed by seabirds (35%) and marine mammals (12%).
• The research supports policies to reduce plastic pollution, particularly targeting dangerous plastics like plastic bags.
• Quantifying the risk of macroplastic ingestion poses challenges compared to microplastics due to difficulties in conducting laboratory experiments.

Key Concepts Involved:

• Necropsy: A post-mortem examination performed on an animal to determine the cause of death.
• Macroplastic: Large plastic debris visible to the naked eye, posing entanglement and ingestion risks to wildlife.
• Microplastic: Small plastic particles less than 5mm in size, often ingested by marine organisms and entering the food chain.