2019:groups:g4:start
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2019:groups:g4:start [2018/12/11 20:21] – [Under construction] lemos | 2019:groups:g4:start [2024/01/09 18:45] (current) – external edit 127.0.0.1 | ||
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**Group 4** | **Group 4** | ||
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If you are a group member login to edit this page, create new pages from it, and upload files. | If you are a group member login to edit this page, create new pages from it, and upload files. | ||
+ | ===== Introduction ===== | ||
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+ | Facilitative interactions are defined as the " | ||
+ | Facilitation was first described as a phenomena occurring between plant species, where the presence of the facilitator species enhances the likelihood of recruitment and establishment of the facilitated species. Interestingly, | ||
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+ | Recently, Li //et al.// (2018) described a non-intuitive reciprocal facilitation between ants and cattle. In a grassland in China, bovids (//Bos taurus//) are the predominant large vertebrate in the area, and ants from the genus //Lasius// are the predominant below ground invertebrate. Through experiments, | ||
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+ | {{ : | ||
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+ | ===== Assignment ===== | ||
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+ | The authors propose a few mechanisms to explain how these two phylogenetically distant species might facilitate each other in nature. Develop a model that allows you to untangle the underlying mechanisms of facilitation between ants and bovids. | ||
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+ | ===== Suggested questions ===== | ||
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+ | * Based on your model, what changes would you expect in the dynamics of the system (in terms of species densities, community composition and coexistence) if the facilitation were not reciprocal? In other words, if the interaction is neutral for one of the species, does it affect populational patterns found in the model in which facilitation is reciprocal? From that, can you infer which species is most affected by the interaction? | ||
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+ | * The authors argue that the interaction is a facultative facilitation. In the absence of cattle, the effects provoked by ants (i.e., enhancement of soil nutrients increasing plant quantity and quality) could feedback negatively on its own population, altering the micro-habit that favors the construction of ant nests. How could this feedback influence long-term population densities and stability of the system? | ||
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+ | ===== References ===== | ||
+ | **Reciprocal facilitation between large herbivores and ants in a semi-arid grassland** Xiaofei Li, Zhiwei Zhong, Dirk Sanders, Christian Smit, Deli Wang, Petri Nummi, Yu Zhu, Ling Wang, Hui Zhu and Nazim Hassan1 //PRSB// (2018) [[https:// | ||
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+ | **The Princeton Guide to Ecology** Levin, Simon A., et al., eds. //Princeton University Press// (2009) | ||
- | Facilitation interactions are defined as the " | + | **data from the paper** [[https:// |
2019/groups/g4/start.1544559662.txt.gz · Last modified: 2024/01/09 18:45 (external edit)