Compose a paragraph summarizing on point from the paper we read this week (it will be attached below named lizards.pdf)
- Read the paper.
- Use the point you identified and supporting evidence from the previous assignment to compose the paragraph.
- The point identified from the previous assignment: The title of the paper suggests that it will discuss the rapid evolution of a native species in response to the invasion of a closely related species. It implies that the native species underwent phenotypic changes following the invasion, indicating a potential evolutionary response. From the title and abstract, it is not possible to gather specific information about Figure 1. However, it can be inferred that Figure 1 likely presents some form of visual representation or data related to the observed phenotypic changes in the native lizard species (Anolis carolinensis) in response to the invasion by a closely related species (Anolis sagrei). The figure might include comparisons of toepad size or perch height between different generations or populations of Anolis carolinensis. The researchers likely made several key observations that led them to propose this experiment. Firstly, they probably noticed the invasion of Anolis sagrei, a congener (closely related species) to Anolis carolinensis, on small islands in Florida. Secondly, they might have observed that Anolis carolinensis individuals moved to higher perches in response to the invasion. Finally, they likely observed changes in the toepad size of Anolis carolinensis individuals over a relatively short period (20 generations), suggesting potential adaptive evolution. The research question the authors aimed to answer was whether negative interactions between closely related species can drive phenotypic divergence and lead to rapid evolutionary changes. Their hypothesis was that the invasion of Anolis sagrei, a congener, would lead to phenotypic divergence in Anolis carolinensis, specifically through the evolution of larger toepads as a response to increased competition for higher perches. Based on their hypothesis, the authors predicted that Anolis carolinensis populations on the islands invaded by Anolis sagrei would exhibit larger toepads compared to populations on islands without the invasion. The authors conducted an observational study in the natural habitat of the lizards. They likely observed and measured the toepad size of Anolis carolinensis individuals from different populations on invaded islands and compared them to populations on non-invaded islands. The key point from this article is that negative interactions between closely related species can lead to rapid evolutionary changes in response to competition. This finding supports the idea that strong natural selection can drive phenotypic divergence on observable time scales.Two pieces of evidence from the paper that support this point are:The researchers found that Anolis carolinensis individuals on invaded islands had significantly larger toepads compared to individuals on non-invaded islands. This difference suggests an evolutionary response to the invasion, as larger toepads are likely beneficial for competing for higher perches. The study also showed that the difference in toepad size between invaded and non-invaded islands increased with the number of generations since the invasion. This pattern indicates that the phenotypic divergence was occurring over a relatively short time span, supporting the notion of rapid evolutionary change.To make sense of the results explained above, someone who has not read the paper would need to understand the methods used to measure toepad size. This would include details about how the researchers captured and handled the lizards, as well as the specific measurements taken. Additionally, knowledge of the islands' characteristics, such as perch availability and density of Anolis sagrei, would provide context for interpreting the results and their implications.
Requirements:
- Your paragraph must include all the parts indicated here: thesis statement, supporting sentences and concluding sentences.
- Format your paragraph as indicated: Please use these color highlights to identify each component of your paragraph: Thesis statement (purple), Supporting statement (red), Explanation of the study (orange), Supporting results (green), Conclusion statement (blue).
- Every sentence in your paragraph must be completely paraphrased.
- Your paragraph must include at least one in-text citation plus the complete reference of the original article formatted according to these guidelines (the rubric will be attached below)