Current ionising radiation doses in the Chernobyl Exclusion Zone do not directly impact on soil biological activity.

Current ionising radiation doses in the Chernobyl Exclusion Zone do not directly impact on soil biological activity.
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DOI:
10.1371/journal.pone.0263600
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发表时间:
2022
期刊:
影响因子:
3.7
通讯作者:
Barnett CL
Barnett CL
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Beresford NA;Wood MD;Gashchak S;Barnett CL

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虽然土壤生物对生态系统的功能至关重要,但对辐射对高度污染场地土壤生物活动的影响的研究相对较少。2016年4月至5月,我们在切尔诺贝利禁区(CEZ)的研究地块进行了第一次大规模的诱饵层部署,以估计土壤生物(主要是土壤无脊椎动物)的原位摄食活动。在我们的53个研究地块中,估计土壤生物的加权吸收剂量率范围为0.7 μ戈伊·小时-1至1753 μ戈伊·小时-1。土壤生物摄食活性与估算的加权吸收剂量率之间没有显著的关系。土壤生物活性没有显着的关系,土壤水分含量,容重(作为土壤有机质的代理)和pH值。在红森林(针叶种植园区,树木死亡,因为高辐射照射在1986年)的地块土壤生物活性低,相比其他地方的CEZ地块。在红森林中观察到的较低的生物活性可能是1986年实际上严重高辐射照射的残余后果。
Although soil organisms are essential for ecosystem function, the impacts of radiation on soil biological activity at highly contaminated sites has been relatively poorly studied. In April-May 2016, we conducted the first largescale deployment of bait lamina to estimate soil organism (largely soil invertebrate) feeding activity in situ at study plots in the Chernobyl Exclusion Zone (CEZ). Across our 53 study plots, estimated weighted absorbed dose rates to soil organisms ranged from 0.7 μGy h-1 to 1753 μGy h-1. There was no significant relationship between soil organism feeding activity and estimated weighted absorbed dose rate. Soil biological activity did show significant relationships with soil moisture content, bulk density (used as a proxy for soil organic matter) and pH. At plots in the Red Forest (an area of coniferous plantation where trees died because of high radiation exposure in 1986) soil biological activity was low compared to plots elsewhere in the CEZ. It is possible that the lower biological activity observed in the Red Forest is a residual consequence of what was in effect an acute high exposure to radiation in 1986.
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