Biology Data Analysis Project Example: Life in the Seas
Oyster reefs are complex intertidal communities that provide a habitat to the fish, annelid, and arthropod species. This ecosystem was restored along the Bronx River, and the impact on the crab population was observed over three summers. In this case, the two species of focus are Hemigrapsus sanguineus, an invasive species, and Rhithropanopeus harrisii, the native species (Wood et al., 2016). Get legit paper writing services on Biology Data Analysis projects!
Hemigrapsus sanguineus was labelled as opportunistic because it is an opportunistic omnivore and tends to tolerate a euryhaline and eurythermic. This biology data analysis project example hypothesized that the invasive species grew more in both size and population over the three seasons. The purpose of such a study would be to determine whether the invasive species had a negative impact on the native species after the restoration of the oyster reef.
Biology Data Analysis Project Example Table: Abundance of the Crab Species on a Restored Oyster Reef
|Season||Hemigrapsus sanguineus||Rhithropanopeus harrisii|
Having analyzed the data, it was found that Hemigrapsus sanguineus had a mean of 16.90, significantly larger than Rhithropanopeus harrisii, which was14.59. The size of the invasive species had more inconsistencies, as depicted by the variance of 27.24 compared to that of 12.35, the variance of the native species. Furthermore, the invasive species, Hemigrapsus sanguineus, of 48 was more abundant, as depicted by the count of the used sample.
The sample size of the native species was found to be 22. Having visualized the data, the researcher also observed that the population of the invasive species was increasing over the years while that of the native species, Rhithropanopeus harrisii, was on a decreasing trend, as depicted with a line graph.
Biology Data Analysis Project Example: Data visualization on the Abundance of the Crab Species on a Restored Oyster Reef
The researcher also hypothesized that the size of the invasive H. sanguineus was, on average larger than the native R.harrisii. Hypothesis testing on the size of the crab species live on a restored oyster reef, something that was measured with the use one-tailed T-test:
- H0: The invasive H. sanguineus was on average the same size or smaller than the native R.harrisii.
- HA: The invasive H. sanguineus was, on average larger than the native R.harrisii.
Biology Data Analysis Project Example: The critical value at the significance level (α) equals 0.05, and the degree of freedom is 21 equals 1.721 (Fowler et al., 2013).
The t-test statistic, 0.01707, is less than the critical value, which equals 1.721, within the acceptance region. Therefore, we do not reject the null hypothesis that invasive H. sanguineus was on average the same size or smaller than the native R.harrisii. The alternative hypothesis that invasive H. sanguineus was on average larger than the native R.harrisii is untrue. To sum up, the invasive H. sanguineus was larger and more abundant than the native R.harrisii; thus, the invasive species may threaten the existence of the native species (Jarvis & Clark, 2021).