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In order to understand the community structure dynamics of fish eggs and larvae in the estuarine waters, four surveys were conducted in the coastal waters of the Huanghe River Estuary in June of 2014, 2015, 2017, and 2018. According to the species composition and quantitative distribution of fish eggs and larvae, the resource distribution of fish eggs and larvae in this water area was comprehensively studied by using the methods of biodiversity index, R software clustering and Pearson correlation matrix analysis. The results showed that a total of 3 829 fish eggs and 234 larvae were collected during the four surveys by horizontal trawl with plankton net. The obtained fish eggs and larvae belonged to 7 orders, 14 families and 15 genera. The dominant species of eggs were Engraulis japonicus and Cynoglossus joyeri. The dominant species of larvae were Konosirus punctatus and Gobiidae sp. All biodiversity indexes were the highest in 2015 and the lowest in 2018. Used the R language to cluster the similarity of the species composition between fish eggs and larvae, and divided the 4 survey years into 3 groups, each grouping the main divergent species were E. japonicus. The results of Pearson correlation matrix showed that salinity was closely related to the biodiversity of fish eggs and larvae. The analysis showed that the annual variation characteristics of community distribution and diversity of fish eggs and larvae in the Huanghe River Estuary and adjacent waters reflected the response of fish to environmental variation.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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