2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/07/2017 | 10:15 AM - 10:30 AM | DETERMINING HOW INVASION AFFECTS NATIVE HOSTS AND THEIR SYMBIONTS: A TALE OF CRAYFISH AND THEIR SYMBIOTIC WORMS | 305A
DETERMINING HOW INVASION AFFECTS NATIVE HOSTS AND THEIR SYMBIONTS: A TALE OF CRAYFISH AND THEIR SYMBIOTIC WORMS
A lot of attention has been directed towards understanding introduced species and their impacts on invaded systems. Less well studied is how invasion affects native hosts and their symbionts. Holarctic crayfish host diverse assemblages of symbiotic worms known as Branchiobdellida. These leach-like annelids are cleaning symbionts of crayfish with no free-living life stage, requiring a crayfish host for reproduction and dispersal. These assemblages vary based on crayfish genera. Species in the genus Cambarus derive health benefits from this symbiosis at intermediate worm abundance while many Orconectes species appear to be less tolerant of symbionts. Orconectes presence in crayfish communities has been shown to significantly reduce both Branchiobdellida density and richness. As many invasive crayfish species are Orconectes, differences in host symbiont tolerance may influence native symbiont diversity and abundance. To determine what effect invasion has had on both crayfish and Branchiobdellida communities, historic survey sites in the Mountain Lake region of Virginia were resampled. Combined with results from symbiont dispersal experiments, these results will help us to better understand a poorly studied aspect of invasion.
- C26 Invasive Species
- C03 Invertebrates
- S12 Challenges, insights, and opportunities in crayfish conservation and ecology
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Presenters/Authors
Spencer Bell
(), University of Alabama, obscurus@vt.edu;
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Robert Creed
(), Appalachian State Universtiy, creedrp@appstate.edu;
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Bryan Brown
(), Virginia Tech, stonefly@vt.edu;
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