海洋碎片通过缠结或通过生物体摄取来威胁生物多样性。Coastal waters are deteriorating due to nutrient loading and following eutrophication – a phenomenon expected to affect 20% of large marine ecosystems by 2050. Important habitats are under pressure and as an example, about 20% of the world’s coral reefs have today been destroyed and nearly 50% of remaining reefs are under imminent risk of collapse through human pressures.