Volume 8 Issue 2
Apr.  2015
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Article Navigation >  Water Science and Engineering  > 2015  >  8(2): 127-131
Xiu-feng Zhang, Xue-ying Mei. 2015: Effects of benthic algae on release of soluble reactive phosphorus from sediments: a radioisotope tracing study. Water Science and Engineering, 8(2): 127-131. doi: 10.1016/j.wse.2015.04.008
Citation: Xiu-feng Zhang, Xue-ying Mei. 2015: Effects of benthic algae on release of soluble reactive phosphorus from sediments: a radioisotope tracing study. Water Science and Engineering, 8(2): 127-131. doi: 10.1016/j.wse.2015.04.008
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Effects of benthic algae on release of soluble reactive phosphorus from sediments: a radioisotope tracing study

doi: 10.1016/j.wse.2015.04.008
  • a.

    Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou 510632, PR China

  • b.

    College of Resources and Environment, Anhui Agricultural University, Hefei 230036, PR China

Funds:  This work was supported by the National Natural Science Foundation of China (Grant No. 31100339) and the Special Program of the China Postdoctoral Science Foundation (Grant No. 2012T50494).
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  • Corresponding author: Xue-ying Mei
  • Received Date: 2013-12-10
  • Rev Recd Date: 2015-03-17
    Abstract
  • To evaluate the effect of benthic algae on soluble reactive phosphorus (SRP) release from sediments in shallow lakes, experiments on SRP release with and without benthic algae in sediment cores and an experiment on SRP uptake by benthic algae were conducted using the radioisotope (32P) tracing method. The dissolved oxygen (DO) concentration in sediment cores was also investigated. The results show that benthic algae effectively reduce the release of SRP from sediments to overlying water. The uptake of SRP by benthic algae, which is the direct way in which benthic algae affect the SRP release from sediments, is low in filtered water and increases with the SRP concentration. However, in the experiment, the increased uptake rate lasted for a short time (in one hour), and after that it returned to a low rate. Benthic algae make the DO concentration and the oxic layer thickness increased, which can indirectly reduce the SRP release from sediments. These findings indicate that benthic algae can reduce the SRP release from sediments in both direct and indirect ways. It seems that the indirect way also plays an important role in reducing the SRP release from sediments.

     

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