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人为扰动背景下城郊溪流底质磷的生物-非生物吸收潜力分析
摘要点击 1880  全文点击 689  投稿时间:2017-02-03  修订日期:2017-03-17
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中文关键词  磷的生物-非生物吸收  底质  人为扰动  城郊溪流  土地利用变化
英文关键词  biotic and abiotic uptake of phosphorus  benthic sediments  human disturbance  suburban stream  land use change
作者单位E-mail
李如忠 合肥工业大学资源与环境工程学院, 合肥 230009 Lrz1970@163.com 
叶舟 合肥工业大学资源与环境工程学院, 合肥 230009  
高苏蒂 安徽新华学院土木与环境工程学院, 合肥 230031  
郑侠 合肥工业大学资源与环境工程学院, 合肥 230009  
中文摘要
      为揭示土地利用变化对城郊溪流底质磷吸收的影响,2016年6~11月在合肥市城市边缘某一源头溪流逐月采集溪流底质样,利用实验培养法分析人为扰动背景下溪流底质磷的生物与非生物吸收潜力及其变化特征. 结果表明:底质磷的总吸收潜力和非生物吸收潜力都表现为夏季高于秋季;毗邻排污口的3号采样点沉积物磷的总吸收潜力和非生物吸收潜力明显高于其它各采样点;无论是夏季还是秋季,6个采样点位底质磷的生物吸收贡献率都低于相应的非生物吸收贡献率,而且彼此之间差异十分明显;各采样点底质磷的吸收潜力、吸收贡献率的逐月变化态势,表明土地利用变化引发的强烈人为扰动对溪流底质磷的生物吸收影响很大.
英文摘要
      To reveal the impact of land use change on the phosphorus uptake in benthic sediments of suburban streams, a headwater stream in the urban fringe of Hefei City was selected and a set of benthic sediments was collected monthly from the chosen stream reach from June to November 2016. An incubation method was applied to explore the biotic and abiotic uptake of phosphorus in benthic sediments under intense human disturbance scenario. Results showed that the uptake potentials in summer were higher than those in autumn, both for total (including biotic and abiotic) and abiotic uptake of phosphorus. Furthermore, both of these uptakes were distinctly higher for the third sampling site, which is adjacent to the sewage outlet, than those for the other sites. For all six sampling sites, the contribution rate of biotic uptake of phosphorus was significantly greater than that of abiotic uptake, both in summer and autumn. The monthly variations in potentials and contribution rates of phosphorus uptake indicated that intense human disturbance via land use change had a great impact on the biotic uptake of phosphorus in benthic sediments of the suburban stream.

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