Response of microalgae to large-seaweed cultivation as revealed by particulate organic matter from an integrated aquaculture off Nan'ao Island, South China

Large seaweed cultivation has proven an effective means to inhibit harmful microalgae at experimental scales and battle eutrophication in Chinese coastal waters, but essentially there is a lack of field-scale studies to explore the underlying mechanism. Here we present a 1.5-year-long time series of...

Full description

Saved in:
Bibliographic Details
Published in:Marine pollution bulletin 2018-08, Vol.133, p.137-143
Main Authors: Zhang, Anhong, Wen, Xu, Yan, Hongyu, He, Xiufang, Su, Hong, Tang, Hongqu, Jordan, Richard W., Wang, Yang, Jiang, Shijun
Format: Article
Language:English
Subjects:
Aquaculture
Bioremediation
China
Chinese coastal waters
Eutrophication
Gracilaria lemaneiformis
Integrated multi-trophic aquaculture
Islands
Microalgae
Microalgae - growth & development
Particulate Matter - analysis
Rhodophyta
Seaweed
Water Pollutants - analysis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Large seaweed cultivation has proven an effective means to inhibit harmful microalgae at experimental scales and battle eutrophication in Chinese coastal waters, but essentially there is a lack of field-scale studies to explore the underlying mechanism. Here we present a 1.5-year-long time series of particulate organic matter (POM) and settling particulate matter (SPM) concentrations from an integrated aquaculture of Gracilaria lemaneiformis off the coast of Nan'ao Island, South China from April 2014 to August 2015. The microscopic examination and geochemical characteristics show that the POM mainly consisted of microalgae. The mean POM concentration increased 99.8%, 71.2%, 45.8% and 111.9% at the four sampling sites during the non-cultivation period, while decreased 25.5%, 17.3%, 12.2% and 20.3%, respectively, during the seaweed cultivation period. These results suggest that the large scale seaweed cultivation can remove excess nutrients and inhibit microalgal growth, thereby contributing to the improvement of coastal marine aquaculture environment. [Display omitted] •A 1.5-year-long particulate organic matter and settling particulate matter record•Particulate organic matter (POM) mainly consists of microalgae.•POM concentration decreases during large seaweed cultivation period.•POM concentration increases when during non-seaweed cultivation period.•Large seaweed cultivation helps improve coastal aquaculture environment.
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2018.05.026