2017:groups:g8:start
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**Group 8** | **Group 8** | ||
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Wiki site of the practical exercise of the [[http:// | Wiki site of the practical exercise of the [[http:// | ||
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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 feedback between chironomids and algae creates net mutualism between benthic primary consumers and producers. Ecology. doi: | ||
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+ | ===== Results ===== | ||
+ | |||
+ | * [[http:// | ||
2017/groups/g8/start.1484106269.txt.gz · Last modified: 2024/01/09 18:45 (external edit)