MO4 D01

glass frog

General Information for the case study: if you would like access to this data set, please email your country office via the contact page

WRL reference M04 D01
Module M04 Ecosystems – Tropical Rainforests
Data Set D01 Prevalence of chytrid in two critically endangered species of tree frog in Cusuco National Park, Honduras
Research questions
  1. What is the overall proportion of the sample that was infected with chytrid for each species and which species appears to be most negatively affected by chytrid?
  2. How does the proportion of infected individuals vary between each of the survey sites for each of the two species and why might sample size be an important factor to consider when interpreting these results?
Keywords Amphibian; conservation; data; DNA; endangered; forest; global; habitat; invasive; IUCN; sampling; species; disease; PCR.
Potential Curriculum links AP Biology 1.C.1, 1.C.3, 4.B.3, 4.B.4,
AP Env Sci VII Global Change C
IB Biology C.1, C.2
IB Ess 4.2.1
AQA 3.4.6, 3.4.7, 3.7.4, 3.8.4, MS, AT, PS, practical 12
edexcel A – 4.4, 4.16, 6.4 B – 7.1, 10.1 Maths A
OCR A – 4.1.1, 4.2.1, 6.1.3, 6.3.1, 6.3.2, B – 5.1.3 – M, PAG, HSW
SQA FH2G 1 (a) (ii), FH2J 3 (b) (c) (i) (ii) (iii) (iv)
CCEA  1.3.1
WJEC C1-5, C2 -1, C2- 7, App B, Pract.req.
Summary

This data set investigates the prevalence of infections chytrid fungus amongst amphibian populations in Cusuco National Park, Honduras. Individuals of two tree frog species were collected from various sites throughout the forest, and swab samples taken for genetic analysis to identify which individuals were infected. The exercise involves analysing the data and then plotting two simple bar charts to show differences between species and between locations.

Difficulty: 6/10