Agroecología, El Colegio de la Frontera Sur, Unidad Campeche, Av Polígono s/n, Cd. Industrial, Lerma, Campeche, Mexico.
Soil Physics and Land Management Group, Wageningen University & Research, Droevendaalsesteeg 4, 6708PB, Wageningen, The Netherlands.
Sci Rep. 2017 Oct 26;7(1):14071. doi: 10.1038/s41598-017-14588-2.
Although plastic pollution happens globally, the micro- (<5 mm) and macroplastic (5-150 mm) transfer of plastic to terrestrial species relevant to human consumption has not been examined. We provide first-time evidence for micro- and macroplastic transfer from soil to chickens in traditional Mayan home gardens in Southeast Mexico where waste mismanagement is common. We assessed micro- and macroplastic in soil, earthworm casts, chicken feces, crops and gizzards (used for human consumption). Microplastic concentrations increased from soil (0.87 ± 1.9 particles g), to earthworm casts (14.8 ± 28.8 particles g), to chicken feces (129.8 ± 82.3 particles g). Chicken gizzards contained 10.2 ± 13.8 microplastic particles, while no microplastic was found in crops. An average of 45.82 ± 42.6 macroplastic particles were found per gizzard and 11 ± 15.3 macroplastic particles per crop, with 1-10 mm particles being significantly more abundant per gizzard (31.8 ± 27.27 particles) compared to the crop (1 ± 2.2 particles). The data show that micro- and macroplastic are capable of entering terrestrial food webs.
尽管塑料污染是全球性的，但微塑料（<5 毫米）和大塑料（5-150 毫米）向与人类食用相关的陆地物种的转移尚未得到研究。我们首次提供了证据，证明在墨西哥东南部传统玛雅家庭花园中，土壤中的微塑料和大塑料可以转移到鸡体内，而这些地区普遍存在废物管理不善的情况。我们评估了土壤、蚯蚓粪、鸡粪、农作物和鸡肫（用于人类食用）中的微塑料和大塑料。微塑料浓度从土壤（0.87±1.9 个颗粒/克）增加到蚯蚓粪（14.8±28.8 个颗粒/克），再到鸡粪（129.8±82.3 个颗粒/克）。鸡肫中含有 10.2±13.8 个微塑料颗粒，而农作物中则没有发现微塑料。鸡肫中平均每克含有 45.82±42.6 个大塑料颗粒，每克农作物中含有 11±15.3 个大塑料颗粒，且每克鸡肫中大塑料颗粒（1-10 毫米）的含量明显高于农作物（1±2.2 个颗粒）。这些数据表明，微塑料和大塑料都有可能进入陆地食物网。
