Cold Dome Affects Mesozooplankton Communities during the Southwest Monsoon Period in the Southeast East China Sea

In order to better understand the cold dome influence on zooplankton community structure, samples were collected during southwest monsoon prevailing period from southeast waters of East China Sea. To reduce bias caused by different sampling months, in June 2018 and 2019. An obvious activity was proven images remote sensing satellites cruise. contrast, research area much affected open sea high temperature water masses 2019 Significant differences conditions demonstrated surface seawater temperature, salinity, dissolved oxygen concentrations between two cruises. Nevertheless, no significant observed concerning mesozooplankton general, copepods, large crustaceans, other pelagic molluscs However, mean abundance gelatinous plankton significantly with 1213.08 ± 850.46 (ind./m3) 2955.93 1904.42 2019, respectively. Noteworthy, a lower meroplankton, 60.78 47.32 (ind./m3), identified compared 464.45 292.80 Pearson’s correlation analysis also showed highly positive meroplankton (p < 0.01). The variation salinity negative 0.05), Only 0.05). copepod communities separated groups which consistent cruises Based specificity occupancy Macrosetella gracilis, Oithona rigida, Cosmocalanus darwinii, Paracalanus parvus, Calocalanus pavo selected as indicator species for effect study 2018, whereas warm impact Calanopia elliptica, Subeucalanus pileatus, aculeatus, Acrocalanus gibber