2017:groups:g8:start
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===== Introduction ===== | ===== Introduction ===== | ||
- | Ecological interactions are often classified as either negative (predation, parasitism) or positive (mutualism). However, species affect. Two of the most obvious examples | + | Mývatn is a lake located in the north of Iceland known for its rich fauna and high productivity despite low local temperatures. |
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+ | Lava island in lake Mývatn, Iceland. Photo credit: [[https:// | ||
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+ | {{ : | ||
+ | The spectacular landscape comes, however, with a feature that may not be so attractive to tourists: massive insect swarms emerging from the lake every summer (the photo of the swarm is from the [[http:// | ||
===== Assignment ===== | ===== Assignment ===== | ||
+ | Develop and analyze a simple mathematical model capturing both negative and positive interactions between chironomids and the algae they consume. | ||
- | Develop and analyze a simple mathematical model | ||
===== Questions & Suggestions ===== | ===== Questions & Suggestions ===== | ||
+ | * Do different mechanisms of positive interaction lead to different predictions at the level of the population? | ||
+ | * Chironomid populations fluctuate by several orders of magnitude on irregular periods of 4 to 7 years. Can the positive feedback suggested by Herren et al. 2017 help to explain these fluctuations? | ||
+ | * Suggestion: Taking the discussion section in Herren et al. 2017 as a starting point, debate which are the main factors that impose an upper limit to chironomid population sizes. Are these internal or external factors? How should this be incorporated in a model? | ||
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===== References ===== | ===== References ===== | ||
- | Herren, Cristina M., Kyle C. Webert, Michael D. Drake, M. Jake Vander Zanden, Árni Einarsson, Anthony R. Ives, and Claudio Gratton. 2017. “Positive | + | Herren, Cristina M., Kyle C. Webert, Michael D. Drake, M. Jake Vander Zanden, Árni Einarsson, Anthony R. Ives, and Claudio Gratton. 2017. Positive |
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+ | ===== Results ===== | ||
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+ | * [[http:// | ||
2017/groups/g8/start.1484106945.txt.gz · Last modified: 2024/01/09 18:45 (external edit)