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Reciprocal abundance shifts of the intertidal sea stars, Evasterias troschelii and Pisaster ochraceus, following sea star wasting disease.
Kay SWC
,
Gehman AM
,
Harley CDG
.
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Disease emergence occurs within the context of ecological communities, and disease driven declines in host populations can lead to complex direct and indirect ecological effects. Varying effects of a single disease among multiple susceptible hosts could benefit relatively resistant species. Beginning in 2013, an outbreak of sea star wasting disease (SSWD) led to population declines of many sea star species along the west coast of North America. Through field surveys and laboratory experiments, we investigated how and why the relative abundances of two co-occurring sea star species, Evasterias troschelii and Pisaster ochraceus, shifted during the ongoing wasting epidemic in Burrard Inlet, British Columbia, Canada. We hypothesized that Evasterias is competitively inferior to Pisaster but more resistant to SSWD. Thus, we predicted that SSWD-induced declines of Pisaster could mitigate the negative effects of SSWD on Evasterias, as the latter would experience competitive release. We document shifts in sea star abundance from 2008-2017: Pisaster abundance and mean size declined during the outbreak, while Evasterias abundance increased from relatively rare to numerically dominant within the intertidal. When exposed to symptomatic sea stars, Pisaster and Evasterias both showed signs of SSWD, but transmission and susceptibility was lower in Evasterias. Despite diet overlap documented in our field surveys, Evasterias was not outcompeted by Pisaster in laboratory trails conducted with the relatively small Pisaster available after the outbreak. Interference competition with larger Pisaster, or prey exploitation by Pisaster during the summer when Evasterias is primarily subtidal, may explain the rarity of Evasterias prior to Pisaster declines. Our results suggest that indirect effects mediated by competition can mask some of the direct effects of disease outbreaks, and the combination of direct and indirect effects will determine the restructuring of a community after disturbance.
Altizer,
Climate change and infectious diseases: from evidence to a predictive framework.
2013, Pubmed
Altizer,
Climate change and infectious diseases: from evidence to a predictive framework.
2013,
Pubmed
Bates,
Effects of temperature, season and locality on wasting disease in the keystone predatory sea star Pisaster ochraceus.
2009,
Pubmed
,
Echinobase
Bucci,
Sea Star Wasting Disease in Asterias forbesi along the Atlantic Coast of North America.
2017,
Pubmed
,
Echinobase
Cohen,
The thermal mismatch hypothesis explains host susceptibility to an emerging infectious disease.
2017,
Pubmed
Decaestecker,
Parasite and nutrient enrichment effects on Daphnia interspecific competition.
2015,
Pubmed
Eisenlord,
Ochre star mortality during the 2014 wasting disease epizootic: role of population size structure and temperature.
2016,
Pubmed
,
Echinobase
Gooding,
Elevated water temperature and carbon dioxide concentration increase the growth of a keystone echinoderm.
2009,
Pubmed
,
Echinobase
Gravem,
Shifts in intertidal zonation and refuge use by prey after mass mortalities of two predators.
2017,
Pubmed
,
Echinobase
Gudenkauf,
Metatranscriptomic Analysis of Pycnopodia helianthoides (Asteroidea) Affected by Sea Star Wasting Disease.
2015,
Pubmed
,
Echinobase
HARDIN,
The competitive exclusion principle.
1960,
Pubmed
Harley,
Color polymorphism and genetic structure in the sea star Pisaster ochraceus.
2006,
Pubmed
,
Echinobase
Harley,
Climate change, keystone predation, and biodiversity loss.
2011,
Pubmed
,
Echinobase
Harvell,
Disease epidemic and a marine heat wave are associated with the continental-scale collapse of a pivotal predator (Pycnopodia helianthoides).
2019,
Pubmed
,
Echinobase
Hatcher,
How parasites affect interactions between competitors and predators.
2006,
Pubmed
Hewson,
Densovirus associated with sea-star wasting disease and mass mortality.
2014,
Pubmed
,
Echinobase
Holdo,
A disease-mediated trophic cascade in the Serengeti and its implications for ecosystem C.
2009,
Pubmed
Hudson,
Competition mediated by parasites: biological and theoretical progress.
1998,
Pubmed
Kay,
Reciprocal abundance shifts of the intertidal sea stars, Evasterias troschelii and Pisaster ochraceus, following sea star wasting disease.
2019,
Pubmed
,
Echinobase
Keesing,
Effects of species diversity on disease risk.
2006,
Pubmed
Kohl,
Decreased Temperature Facilitates Short-Term Sea Star Wasting Disease Survival in the Keystone Intertidal Sea Star Pisaster ochraceus.
2016,
Pubmed
,
Echinobase
Lloyd,
Microbiome shifts with onset and progression of Sea Star Wasting Disease revealed through time course sampling.
2018,
Pubmed
,
Echinobase
Martin,
The effects of anthropogenic global changes on immune functions and disease resistance.
2010,
Pubmed
Menge,
Sea Star Wasting Disease in the Keystone Predator Pisaster ochraceus in Oregon: Insights into Differential Population Impacts, Recovery, Predation Rate, and Temperature Effects from Long-Term Research.
2016,
Pubmed
,
Echinobase
Miner,
Large-scale impacts of sea star wasting disease (SSWD) on intertidal sea stars and implications for recovery.
2018,
Pubmed
,
Echinobase
Montecino-Latorre,
Devastating Transboundary Impacts of Sea Star Wasting Disease on Subtidal Asteroids.
2016,
Pubmed
,
Echinobase
Moritsch,
Reduction and recovery of keystone predation pressure after disease-related mass mortality.
2018,
Pubmed
,
Echinobase
Nowakowski,
Infection risk decreases with increasing mismatch in host and pathogen environmental tolerances.
2016,
Pubmed
Paine,
Intertidal community structure : Experimental studies on the relationship between a dominant competitor and its principal predator.
1974,
Pubmed
,
Echinobase
Schultz,
Evidence for a trophic cascade on rocky reefs following sea star mass mortality in British Columbia.
2016,
Pubmed
,
Echinobase
Sutherland,
Shifting white pox aetiologies affecting Acropora palmata in the Florida Keys, 1994-2014.
2016,
Pubmed
Wood,
Does biodiversity protect humans against infectious disease?
2014,
Pubmed
Wood,
A world without parasites: exploring the hidden ecology of infection.
2015,
Pubmed
