Wu Rongjun¹ Li Ruixiang^2,3 Zhu Mingyuan^2,3, ¹College of Marine Life, Ocean University of Qingdao,Qingdao 266003, ²First Institute of Oceanography, SOA, Qingdao 266061, ³Key Laboratory of Science and Engineering of Marine Ecology and Environment, SOA,Qingdao, 266061

Abstract

In recent decades, there are more events of harmful algae blooms(HABs), which cause severe effect to marine ecosystem d delay the sustainable development of marine industries. Mesocosm ecosystem with sea water enclosed is not affected by the tidal current and horizontal disturbing, and it can reflect better marine ecosystem than laboratory research methods. At the mean time, the hydrodynamics process is relatively simple and the reflections of results are good. So mesocosm experiment is a valid method to study the occurrence and mechanism of algae blooms. This paper summarizes studies of occurrence and its mechanism of HAB during the past decades: (1) The relationship of environmental factors and occurrence of HAB in mesocosm ecosystem, and especially the effects of eutrophication for the occurrence of algae blooms; (2)The changes of community structure, biomass and growth rate of causative organisms of HAB in mesocosm ecosystem; (3) The numerical simulation model of occurrence of algae blooms in mesocosm ecosystem .

Key words: Mesocosm experiment, Harmful Algae Blooms, Eutrophication