The analysis here uses two different methods (one is classification, the other is similarity) to compare the differences between estuaries. And the style differences between the two methods are compared. The estuaries with high similarity are those produced by similarity method, although this is partly due to the relative lack of experimental parameters for classification. Based on different treatment methods (classified treatment or semi-quantitative/qualitative treatment), the classification produced three groups: group 1 including Iberian estuary (Tahoe estuary, Aviro, Casey) and Loire River (with similar classification combination); The second group includes the Dutch Delta (Oosterschelde, Westerschelde, Voordelta) and the British estuaries (Foxe River, Tyne River, Humber River, mersey river River and Solway River), and the Elbe River; The third group connects the Eslu River with the Walden River in the Netherlands and Germany. Oslo Fjord is not single in treatment. The similarity rule is to add all the line information together, and it also produces three groups of results, among which the Solvi River (compared with other river basins) presents some slightly different characteristics. The first group has the highest similarity, including the Dutch Delta (Oosterschelde, Westerschelde, Voordelta) and Humber River. The second group includes the Wadden Sea (Netherlands and Germany), the English estuary (Foces, Tyne and mersey river) and Scandinavia (Eslu, Oslo Fjord), while the third group includes the Iberian and French estuaries. Among the two treatment methods, the largest one is the estuaries of the Netherlands and Britain, which are considered as a common combination of northwest and northern Europe. The diversity of fish species in the same area can be expressed as a function of the amount of edible food and the size of the area (woorron's paper was published in 1990). Therefore, similar to the results found here, the species richness in the larger Wadden Sea and Eslu Sea is the highest. Diversity also increases with the change of biogeographic factors, for example, in the marginal areas of biogeography, species have greater diversity. Some generated species classifications are the * * * interaction of Haikou feature similarity and sampling similarity.

Ps is a non-biological major, so there are some technical terms to be copied. I'm just doing my best.