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Indexed by:期刊论文

Date of Publication:2015-01-01

Journal:3rd Asia-Pacific Conference on Engineering Technology (APCET)

Included Journals:SCIE、CPCI-S

Volume:47

Issue:4

Page Number:1175-1181

ISSN No.:0324-1130

Key Words:Bioturbation; nitrogen; phosphorus; Perinereis aibuhitensis

Abstract:Eutrophication in sediment is harmful to the marine ecology system. Polychaetes are important marine benthic animal populations; their bioturbation can promote the release of nutrients to the upper water. In the current study, using a simple, self-made test device, we studied the influence of P. aibuhitensis on the regular release of nitrogen and phosphorus from the sediments. The experiment was designed in three groups: low concentration (354 ind/m(2), 293. 8 1 g/m(2)), high density (708 ind/m(2), 587.61 g/m(2)) and control group. The results of a test in a 10-day experimental period showed that released concentrations of NH4+-N, NO3--N, and PO43--P in worms' sediment were significantly higher than those in the control group. Among them, the change of NH4+-N and PO43--P was the most significant. The NH4+-N concentration reached the highest value at the sixth day in the high density group (708 ind/m(2)) and its value was 11.4365 mg/L. The released concentration of PO43--P reached a peak at the third day with a value of 0.1574 mg/L. The experimental results proved that P. aibuhitensis could improve the sediment quality.