Journal of Tropical Oceanography ›› 2018, Vol. 37 ›› Issue (6): 120-132.doi: 10.11978/2017130CSTR: 32234.14.2017130

• Marine Biology • Previous Articles     Next Articles

Grazing of three common protozoan on brown tide alga Aureococcus anophagefferens

Yao CHEN(), Xilu YANG, Xuejia HE()   

  1. Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Research Center of Harmful Algae and Marine Biology, Jinan University, Guangzhou 510632, China
  • Received:2017-12-13 Online:2018-11-20 Published:2018-05-15
  • Supported by:
    Natural Science Foundation of Guangdong Province (2017A030313217);Fundamental Research Funds for the Central Universities (21617450);National Marine Public Welfare Industry Research Project (201305003)

Abstract:

With the increase of marine plastic waste, marine microplastics have attracted more and more attention as a new type of marine pollution. At present, studies of the source, distribution and analytical approach of microplastics are well recognized. Most research focuses on plastic ingestion by marine organisms, and on the effects of microplastics adsorbing and releasing toxic chemicals. However, the role of microplastics as a vector for pelagic microorganism, phytoplankton and micozooplankton is poorly understood. In this review, we address three functions of microplastics as a biological vector. 1) Aggregation, it is easy for biofilms to form a microbial community on the surface of microplastics, which provide the means for horizontal transfer of organisms and genes, and may lead to the transformation or transduction of pathogenic gene, antibiotic resistance gene (ARGs), called genetic exchange. 2) Dispersal, the spread of harmful algal species, pathogenic bacteria and drug-resistant bacteria as well as other microorganisms may happen when the microplastics are freshly from the waste water flow, which potentially poses a risk of invasion when arriving in a new habitat with favorable condition. 3) A feeding enhancement concept, we propose this concept because a piece of microplastics is full of the attached biofilms, nutrients and organisms, which may attract large grazers or predators and can also improve their predation efficiency. As a result, these grazers/predators may seek pieces of microplastic as foods, which may cause more serious toxicological effects. The review focuses on the ecological effects of “microplastic + biology”.

Key words: brown tide, A. anophagefferens, protozoan, grazing, EPS

CLC Number: 

  • Q178.53