9. Correspondence Analysis (CA)

Task E

Author

AJ Smit

1 Task E

How would you explain the patterns seen in the last four panels in the Correspondence Analysis Chapter?
Apply approaches taken from the analysis in the Correspondence Analysis Chapter to these datasets:
1. bird communities along elevation gradient in Yushan Mountain, Taiwan;
2. alpine plant communities in Aravo, France.
Discuss the patterns observed, and explain the ordination diagrams with particular reference to how the species are influenced by the major environmental drivers.
(Bonus) For bonus marks that could earn you 120/100, please see if you can recreate the bottom right figure for the species ‘Cogo’ using ggplot2. This will require digging deep into the ordination and ordisurf objects, creating dataframes for each layer of data, and assembling the graph manually.

2 Assessment Criteria

This Task is not formally assessed.

Reuse

CC BY-NC-SA 4.0

Citation

BibTeX citation:

@online{smit,_a._j.,
  author = {Smit, A. J., and Smit, AJ},
  title = {9. {Correspondence} {Analysis} {(CA)}},
  url = {http://tangledbank.netlify.app/BCB743/tasks/Task_E.html},
  langid = {en}
}

For attribution, please cite this work as:

Smit, A. J., Smit A 9. Correspondence Analysis (CA). http://tangledbank.netlify.app/BCB743/tasks/Task_E.html.

---
title: "9. Correspondence Analysis (CA)"
subtitle: "Task E"
author: 
  - "AJ Smit"
---

## Task E

1. How would you explain the patterns seen in the last four panels in the Correspondence Analysis Chapter?

2. Apply approaches taken from the analysis in the Correspondence Analysis Chapter to these datasets:
    i. [bird communities along elevation gradient in Yushan Mountain, Taiwan](https://www.davidzeleny.net/anadat-r/doku.php/en:data:ybirds);
    ii. [alpine plant communities in Aravo, France](https://www.davidzeleny.net/anadat-r/doku.php/en:data:aravo).

3. Discuss the patterns observed, and explain the ordination diagrams with particular reference to how the species are influenced by the major environmental drivers.

4. **(Bonus)** For bonus marks that could earn you 120/100, please see if you can recreate the bottom right figure for the species 'Cogo' using **ggplot2**. This will require digging deep into the ordination and ordisurf objects, creating dataframes for each layer of data, and assembling the graph manually.

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## Assessment Criteria

This Task is not formally assessed.