Li Ru-Zhong, Ye Zhou, Gao Su-di, Zheng Xia
School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China.
College of Civil and Environmental Engineering, Anhui Xinhua University, Hefei 230031, China.
Huan Jing Ke Xue. 2017 Aug 8;38(8):3235-3242. doi: 10.13227/j.hjkx.201702008.
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.
为揭示土地利用变化对城郊溪流底栖沉积物磷吸收的影响，选取了合肥市城市边缘的一条源头溪流，并于2016年6月至11月每月从选定的溪流河段采集一组底栖沉积物。采用孵化法探讨在强烈人为干扰情景下底栖沉积物中磷的生物和非生物吸收情况。结果表明，夏季磷的总吸收（包括生物和非生物吸收）和非生物吸收潜力均高于秋季。此外，与污水排放口相邻的第三个采样点的这两种吸收均明显高于其他采样点。对于所有六个采样点，夏季和秋季磷的生物吸收贡献率均显著大于非生物吸收贡献率。磷吸收潜力和贡献率的月度变化表明，土地利用变化导致的强烈人为干扰对城郊溪流底栖沉积物中磷的生物吸收有很大影响。
