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Microplastics (MPs) pollution, as a global environmental problem, has been recognized as a serious threat to aquatic ecosystems and the health of wild fish. The characteristics and influencing factors of microplastic pollution were analyzed in 11species of wild fish from Baiyangdian. The results indicated that the detection rate of MPs in these 11species was 100%, with an average abundance of (26.54±3.69) MPs per individual. The majority of the detected MPs were identified as transparent and black fibrous particles, with sizes predominantly less than 0.5mm, and their polymer composition was found to be diverse. The accumulation of MPs in Baiyangdian fish was influenced by multiple factors: the biological characteristics of the fish (body length and weight) were shown to determine the probability of MPs intake; the trophic level was observed to affect the biomagnification effect; feeding habits were found to regulate exposure probability; and habitat characteristics (such as the vertical distribution of MPs in the water column) were demonstrated to constrain exposure levels. The interaction of these factors resulted in significant variations in MPs accumulation among different fish individuals, revealing the complex mechanisms underlying MPs bioaccumulation. The findings of this study are expected to provide valuable data support for assessing the status and risks of MPs pollution in Baiyangdian fish populations.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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