2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2018 | 10:00 AM - 10:15 AM | PRIORITY EFFECTS IN A FRESHWATER CLEANING SYMBIOSIS | 420 A
PRIORITY EFFECTS IN A FRESHWATER CLEANING SYMBIOSIS
Colonization order affects community composition when early arrivers preempt resources or space and alter conditions for later arrivers, but the importance of priority effects on the assembly of symbiont communities is poorly understood. We conducted an experiment using a system of crayfish and 2 species of ectosymbiotic annelids, a large intra-guild predator that is dominant, but slow to colonize, and a small fugitive species, quick to colonize but readily consumed. We had 4 treatment levels: each species alone, and two mixed species treatments, one with each species as an early colonizer. Survivorship of the fugitive species decreased 40% relative to the fugitive-alone control with early colonization by the intraguild predator, and in the early fugitive colonization treatment, there was an intermediate level of survivorship. Unexpectedly, predatory symbiont also responded to colonization order with lower survivorship when it was the early colonist. There were also effects on the distribution of the fugitive species on the host crayfish body, with early colonization by the intraguild predator restricting its location. These results clearly demonstrate the potential of priority effects to influence the assembly of symbiont communities in complex ways.
- Trade-offs
- Biodiversity
- Predator-prey
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Presenters/Authors
Bryan Brown
(), Virginia Tech, stonefly@vt.edu;
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Lauren Krauss
(), Virginia Tech, falcon84@vt.edu;
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Spencer Bell
(), University of Alabama, obscurus@vt.edu;
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Robert Creed
(), Appalachian State Universtiy, creedrp@appstate.edu;
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