Bioremediation using Gracilaria lemaneiformis to manage the nitrogen and phosphorous balance in an integrated multi-trophic aquaculture system in Yantian Bay, China

Zhangliang Wei; Jiaguo You; Hailong Wu; Fangfang Yang; Lijuan Long; Qiao Liu; Yuanzi Huo; Peimin He

doi:10.1016/j.marpolbul.2017.04.034

Bioremediation using Gracilaria lemaneiformis to manage the nitrogen and phosphorous balance in an integrated multi-trophic aquaculture system in Yantian Bay, China

Mar Pollut Bull. 2017 Aug 15;121(1-2):313-319. doi: 10.1016/j.marpolbul.2017.04.034. Epub 2017 Jun 13.

Authors

Zhangliang Wei¹, Jiaguo You², Hailong Wu³, Fangfang Yang⁴, Lijuan Long⁴, Qiao Liu³, Yuanzi Huo⁵, Peimin He³

Affiliations

¹ College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, PR China; Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; Maine Scientific Research Institute, Shanghai Ocean University, Shanghai 201306, PR China.
² National Breeding &Husbandry Farm of Donggang City, Donggang, Liaoning Province 118300, PR China.
³ College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, PR China; Maine Scientific Research Institute, Shanghai Ocean University, Shanghai 201306, PR China.
⁴ Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China.
⁵ College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, PR China; Maine Scientific Research Institute, Shanghai Ocean University, Shanghai 201306, PR China. Electronic address: yzhuo@shou.edu.cn.

PMID: 28622987
DOI: 10.1016/j.marpolbul.2017.04.034

Abstract

To reduce negative environmental impacts from human aquaculture activities, the red alga Gracilaria lemaneiformis was co-cultured with the fish Pseudosciaena crocea in an integrated multi-trophic aquaculture (IMTA) system for 35d in Yantian Bay. The eutrophication index value decreased from 14.5 to 8.4 after seaweeds were co-cultured in cage farming areas, which indicated that the eutrophic water column in Yantian Bay could be mediated by IMTA. Total DIN and DIP of the tidal input and output were 9.23kg, 0.19kg and 11.08kg, and 0.27kg, respectively. Total 5.24kg of dissolved N and 0.81kg of dissolved P were released from IMTA system. These results indicate that G. lemaneiformis co-cultured in IMTA system could not completely remove all excess nutrients. In theory, at least 324.48kg of seaweed seedlings would be required to balance excess nutrients generated from fish cages.

Keywords: Bioremediation; Eutrophication; Fish cages; Gracilaria lemaneiformis; Integrated multi-trophic aquaculture (IMTA); Sansha Bay.

MeSH terms

Animals
Aquaculture
Bays
Biodegradation, Environmental*
China
Denitrification
Fishes
Gracilaria*
Nitrogen / metabolism*
Phosphorus / metabolism*

Substances

Phosphorus
Nitrogen