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Running Head: Parasites Destabilize Host Populations 1 2 Parasites Destabilize Host Populations by Shifting Stage-structured Interactions 3 4
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hite, Jessica L. Penczykowski, Rachel M. Shocket, Marta S. Strauss, Alexander T. Orlando, Paul A. Duffy, Meghan A. Cáceres, Carla E. Hall, Spencer R. |
| Copyright Year | 2015 |
| Abstract | 25 Should parasites stabilize or destabilize consumer-resource dynamics? Recent theory 26 suggests that parasite-enhanced mortality may confer underappreciated stability to their hosts. 27 We tested this hypothesis using disease in zooplankton. Across both natural and experimental 28 epidemics, bigger epidemics correlated with larger — not smaller — host fluctuations. Thus, we 29 tested two mechanistic hypotheses to explain destabilization or apparent destabilization by 30 parasites. First, enrichment could in principle, simultaneously enhance both instability and 31 disease prevalence. In natural epidemics, destabilization was correlated with enrichment 32 (indexed by total phosphorous). However, an in-situ (lake enclosure) experiment did not support 33 these links. Instead, field and experimental results point to a novel destabilizing mechanism 34 involving host stage structure. Epidemics pushed hosts from relatively more stable host 35 dynamics with less synchronized juveniles and adults to less stable dynamics with more 36 synchronized juveniles and adults. Our results demonstrate how links between host stage 37 structure and disease can shape host/consumer-resource stability. 38 39 40 41 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.indiana.edu/~halllab/Publications/Hite_et.al_preprint.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
