Asexual Reproduction of Aurelia coerulea Polyps in situ on Settling Plates in Jiaozhou Bay,China  

作　　者：MI Tiezhu ZHU Jianbin ZHEN Yu WANG Guoshan WANG Jianyan 

机构地区：[1]Key Laboratory of Marine Environment and Ecology,Ministry of Education,College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China [2]Laboratory for Marine Ecology and Environmental Science,Qingdao Marine Science and Technology Center,Qingdao 266237,China [3]Frontiers Science Center for Deep Ocean Multispheres and Earth System,Ocean University of China,Qingdao 266100,China [4]National Marine Hazard Mitigation Service,Ministry of Natural Resources,Beijing 100194,China [5]Department of Life Sciences,National Natural History Museum of China,Beijing 100050,China

出　　处：《Journal of Ocean University of China》2024年第5期1371-1380,共10页中国海洋大学学报（英文版）

基　　金：supported by the Scientific and Technological Innovation Project of the Laoshan Laboratory(No.LSKJ202203700);the Beijing Natural Science Foundation(No.8232026).

摘　　要：Jellyfish blooms are increasingly prevalent coastal phenomena,with Aurelia coerulea being a significant contributor.The complex life history of jellyfish,featuring a sessile polyp stage,is a key factor in bloom formation,yet it is challenging to study in the field.This study aimed to describe the asexual reproduction of A.coerulea polyps in Jiaozhou Bay,China,and to assess their ability to form sedentary colonies and their relationship with environmental factors.Using settling plates,we observed polyps in situ and documented three asexual reproduction modes:budding,strobilation,and podocyst formation.Environmental parameters including temperature,salinity,dissolved oxygen(DO),chlorophyll a(Chl a),and the biomass of phytoplankton and zooplankton were monitored.Budding was the predominant reproductive method,featuring stolon budding in autumn and direct budding during the winter and spring seasons.Strobilation took place in the colder months,releasing ephyrae between April and May.Polyp abundance was positively correlated with seawater temperature and negatively correlated with DO concentration.Polyps at 1.0 m depth showed higher survivorship and proliferation over 8 months,whereas those at 2.0 m depth experienced a steady decline and died within 4 months.The study enhances our understanding of the life cycle and asexual reproduction strategies of A.coerulea polyps in the field,with implications for predicting and managing jellyfish blooms.The findings underscore the importance of temperature and DO in polyp survival and suggest that initial polyp population proliferation is crucial for long-term survival.

关 键 词：jellyfish bloom POLYPS BUDDING strobilation asexual reproduction 

分 类 号：Q958.8[生物学—动物学]