Iron-coupled inactivation of phosphorus in sediments by macrozoobenthos (chironomid larvae) bioturbation: Evidences from high-resolution dynamic measurements
Iron-coupled inactivation of phosphorus in sediments by macrozoobenthos (chironomid larvae) bioturbation: Evidences from high-resolution dynamic measurements
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大型底栖动物（摇蚊幼虫）生物扰动对沉积物中磷的铁耦合失活：来自高分辨率动态测量的证据
DOI：
10.1016/j.envpol.2015.04.031
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发表时间：
2015-09-01
影响因子：
8.9
通讯作者：
Zhang, Chaosheng
中科院分区：
文献类型：
--
作者：
Chen, Musong;Ding, Shiming;Zhang, Chaosheng
通过140 d的沉积物培养，研究了摇蚊幼虫生物扰动对沉积物中磷不稳定性的影响。高分辨率透析（HR-窥视器）和扩散梯度薄膜（DGT）技术被应用于获得可溶性和不稳定的P/Fe分布在毫米分辨率，分别。幼虫bioturliation降低浓度的可溶性/不稳定的P和Fe的控制超过一半的沉积物深度的影响，分别为70和90毫米。这些影响持续了116天，并在第140天由于摇蚊幼虫的羽化而消失。不稳定磷与不稳定铁高度相关，而可溶性磷与可溶性铁之间相关性较弱。得出的结论是，Fe（II）氧化及其增强的吸附是导致可溶性和不稳定P减少的主要机制。（C）2015 Elsevier Ltd.保留所有权利。
The effects of chironomid larvae bioturbation on the lability of phosphorus (P) in sediments were investigated through sediment incubation for 140 days. High-resolution dialysis (HR-Peeper) and diffusive gradients in thin films (DGT) techniques were applied to obtain soluble and labile P/Fe profiles at a millimeter resolution, respectively. The larvae bioturliation decreased concentrations of soluble/labile P and Fe by up to over half of the control at the sediment depths of influence up to 70 and 90 mm respectively. These effects continued over 116 days and disappeared on the 140th days due to eclosion of chironomid larvae. Labile P was highly correlated with labile Fe, while a weak correlation was observed between soluble P and soluble Fe. It was concluded that Fe(II) oxidation and its enhanced adsorption were the major mechanisms responsible for the decreases of soluble and labile P. (C) 2015 Elsevier Ltd. All rights reserved.