Seasonal variation of tintinnid communities in Changjiang River estuary and Dachenlsland sea area
We investigated the variation of tintinnid communities in Changjiang River estuary in Jun.,2019 and Dec.,2020),and Dachen Island sea area in Nov.,2020 and Apr.,2021.A total of 83 sam-ples were collected.(1)Eighteen tintinnid species belonging to 9 genera were observed,and the total a-bundance ranged from 0 to 618 ind./L.(2)Lorica oral diameter(LOD)of the 18 tintinnid species var-ied between 14.5 and 96.4 pm,and were grouped into 8 size classes.(3)Tintinnid abundance in Dachen Island sea area was significantly and positively correlated to temperature and chlorophyll a con-centration(p＜0.01)but significantly and negatively to salinity(p＜0.01).(4)There were more re-dundant species and LOD size classes in Dachen Island sea area than in Changjiang River estuary.The existence of redundant species should increase the capability of a community to exploit changes in condi-tions,leading to the speculation of more stable tintinnid communities in Dachen Island sea area.Our findings provided basic data for further studies on the microbial ecology of Changjiang River estuary and its adjacent areas.
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万方数据
