节肢动物体内的总汞和甲基汞含量研究

Total and Methyl Mercury Contents in Arthropods

分析了汞污染区河流沿岸草本植物及节肢动物样品中的汞含量.结果表明,节肢动物飞蝗、中华蚱蜢总汞含量分别为0.032～0.402 mg·kg^-1、0.023～0.362 mg·kg^-1,高于非污染区1个数量级.飞蝗、中华蚱蜢甲基汞含量分别为0.003～0.031mg·kg^-1、0.004～0.015 mg·kg^-1,占总汞比例分别为3.5%～49.7%和2.0%～44.4%.飞蝗、中华蚱蜢体内（一级消费者）汞含量低于其食物草本植物,与未受污染地区不同;螳螂体内（二级消费者）汞明显累积.飞蝗体内总汞含量随着个体长度增长呈下降的趋势,在中华蚱蜢体内则先增长后下降,甲基汞随着个体长度增长呈上升趋势;节肢动物个体不同部位中汞含量明显不同,腹〉胸〉头.节肢动物体内汞和甲基汞可能导致野生鸟类、家禽、两栖类生态风险.

We researched mercury contents in plants and arthropods collected from the river banks in mercury polluted areas. The results show that total mercury （T-Hg） and methyl mercury （Me-Hg） in Locusta migratoria manilensis and Acrida chinensis are 0.032- 0.402mg·kg^-1, 0.023 ～0.362 mg·kg^-1 and 0.003 - 0.031 mg·kg^-1 ,0.004 - 0.015 mg·kg^-1 while the proportion of Me-Hg to T-Hg are 3.5% - 49.7% and 2.0% ～ 44.4%. T-Hg in arthropods is higher than that a magnitude in non-polluted areas. As primary consumers, mercury contents in Locusta migratoria manilensis and Acrida chinensis arc lower than plants they eat. That is not consistent with the non-polluted areas. Paratenodera sinensis is the second consumer and there is an obvious mercury accumulation in it. For Locusta migratoria manilensis, T-Hg decreased with the body length while for Acrida chinensis that increased following a decreasing. But Me-Hg in both increased with body length. Mercury contents in tissues of arthropods arc significantly different. The order is abdomen 〉 thorax 〉 head. Mercury and methyl mercury contents in arthropods would lead wild birds, fowls and amphibians in the ecologic risk condition.