General speaking, the snail density showed a decreasing trend from 2017 to 2021, as shown in Figure 2 .
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Identifying the Determinants of Distribution of <i>Oncomelania hupensis</i> Based on Geographically and Temporally Weighted Regression Model along the Yangtze River in China.
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The sentences
According to the results, Moran’s I index of live snail density in the survey region from 2017 to 2021 showed a decreasing trend and then an increasing trend, indicating spatial aggregation ( Table 2 ).