The next section of for the widely distributed native and non-native article is the materials where they first talk about the species they have selected for this and from what sources they were gathering the information from, followed by the traits that were relevant to the distribution of the species being observed. Finally, it mentions the trait interaction model which is used to determine the frequency of grid-cells a species occupied in connection to the train they have and interactions. This section went from broad to specific, from what species down to the specific trait interactions. The purpose of this section is to let the audience know where and how they were going about this problem or hypothesis so the audience could try to get the same results with the same sources and therefore data that the author used in this. The first paragraph of this section is used to give the audience the understanding of where they are gathering their main data from, from which outside database they used to get the data broad numbered data.
The article on the Baltic Sea have the same purpose for this section although it doesn’t explicitly administer that is the materials and methods. However, it still includes what is used in this section. It is also structured the same way by first mentioning how the non-native species were brought into the Baltic, then going into the rate of invasion currently and the number of species and their dispersal rate. The first paragraph in this section is used to give the origin of the problem, in contrast with the first article I mentioned, this article gives an even broader start to the problem, beginning with how this started.
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