中国黑龙江省3处森林内鼩鼱骨组织中的镉、汞、铅生物积累
Bioaccumulation of Cadmium, Mercury, and Lead in Bone Tissue of Shrews in Three Forests in Heilongjiang Province, China
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摘要: 通过超级微波消解-电感耦合等离子体质谱法，对中国黑龙江省3处森林中107只鼩鼱科动物的骨组织的镉、汞和铅的生物累积进行了定量分析。分析表明，整体污染水平凤凰山森林最高，其次是横道河子森林，松岭森林的污染水平最低。值得注意的是，凤凰山森林和横道河子森林的镉平均浓度均较高：(0.57±0.16) mg·kg-1(干质量)和(0.19±0.17) mg·kg-1(干质量)。这表明这2处森林的鼩鼱栖息地存在潜在的生态风险。在3年的时间里(2016年、2017年和2022年)，横道河子森林的镉和汞的浓度均呈下降的趋势，而铅浓度则保持稳定，未发现明显上升或下降的趋势。具体而言，从2017年到2022年，远东鼩鼱的镉浓度降低了74.34%(P=0.010)，汞浓度降低了61.45%(P=0.004)。同样，对于中鼩鼱来说，2022年的镉浓度比2017年下降了64.75%(P=0.027)。这表明横道河子森林的鼩鼱栖息地的潜在生态风险在2022年明显降低。总之，本研究对中国黑龙江省3处森林的鼩鼱骨组织中的镉、汞和铅积累进行了定量评估，为小型哺乳动物种群的生态毒理学研究提供了理论支持，对黑龙江省森林重金属污染进行了生物监测和潜在生态风险的评估。Abstract: Through the utilization of super microwave digestion coupled with inductively coupled plasma mass spectrometry, we quantified the bioaccumulation of cadmium (Cd), mercury (Hg), and lead (Pb) in the bone tissues of 107 shrews across three forests in Heilongjiang Province, China. Our analysis revealed that the Fenghuangshan Forest exhibited the highest overall contamination level, followed by the Hengdaohezi Forest, with the lowest concentration observed in the Songling Forest. Notably, both the Fenghuangshan and Hengdaohezi forests demonstrated elevated average concentrations of Cd: (0.57±0.16) mg·kg-1 (dry weight), (0.19±0.17) mg·kg-1 (dw) suggesting potential ecological risks within the shrews’ habitats in these areas. Over a three-year period (2016, 2017, 2022), concentrations of Cd and Hg displayed a decreasing trend in the Hengdaohezi Forest, while Pb concentrations remained stable without significant fluctuations. Specifically, among the Sorex isodon, Cd concentrations decreased by 74.34% (P=0.010) and Hg concentrations decreased by 61.45% (P=0.004) from 2017 to 2022. Similarly, for Sorex caecutiens, Cd concentrations in 2022 compared to 2017 decreased by 64.75% (P=0.027), indicating a significant reduction in potential ecological risks within the Hengdaohezi Forest. In summary, our study provides quantitative assessments of Cd, Hg, and Pb accumulation in shrew bone tissues across three forests in Heilongjiang Province, China. These findings offer theoretical support for ecotoxicological investigations of small mammal populations and contribute to the monitoring and evaluation of potential ecological risks associated with heavy metal pollution in forest ecosystems within Heilongjiang Province.
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Key words:
- cadmium /
- mercury /
- lead /
- heavy metal pollution /
- animal bone tissue /
- shrews
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