在加拉帕戈斯群岛和加拉帕戈斯企食物网中对微塑料和纤维素颗粒的生态毒理学评估
Karly McMullen1, Paola Calle2, Omar Alvarado-Cadena2
1Ocean Pollution Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, British Columbia, Canada.
Environmental toxicology and chemistry
|May 2, 2024
概括
在加拉帕戈斯群岛存在微塑料污染.
科学领域:
- 海洋生物学 海洋生物学
- 环境科学 环境科学
- 生态毒理学 生态毒理学
背景情况:
- 联合国教科文组织列为世界遗产的加拉帕戈斯群岛面临微塑料污染的威胁.
- 危的加拉帕戈斯企 (Spheniscus mendiculus) 被用作哨兵物种来评估这种威胁.
研究的目的:
- 评估加拉帕戈斯群岛海洋食物网中的微塑料和人为纤维素度.
- 根据猎物消费,估计加拉帕戈斯企每天的微塑料摄入量.
主要方法:
- 收集的表面海水,动物浮游生物,企潜在的猎物 (鱼,鱼,牛奶鱼) 和企便样.
- 使用已确定的分析技术量化微塑料和纤维素.
- 基于猎物污染和饮食,计算了企每天潜在的微塑料摄入量.
主要成果:
- 在表面海水 (0.40 ± 0.32颗粒/L) 和各种猎物物品中检测到微塑料.
- 动物浮游生物,鱼,鱼和牛奶鱼的微塑料度从0.003到27个颗粒/个体不等.
- 企每天的微塑料摄入量估计在2881至9602个颗粒之间,但没有在便中发现任何颗粒.
结论:
- 在加拉帕戈斯海性食物网中确认了微塑料污染,并影响了危企.
- 调查结果强调了在加拉帕戈斯群岛和全球范围内需要制定政策来减轻塑料污染和保护海洋生物多样性.
相关概念视频
Sources of Food Contamination
Contamination of food by microbial agents and natural toxins poses significant risks to public health. These hazards can be introduced at various points across the food supply chain, ranging from environmental sources to processing and storage stages. Understanding these contamination pathways is critical for developing strategies to ensure food safety.Seafood is particularly vulnerable to contamination through both environmental exposure and microbial colonization. Toxins from harmful algal...
Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...


