Host and Parasite Populations After a Ten Year Flood:Manayunkia speciosaandCeratonova(synCeratomyxa)shastain the Klamath River

Alexander, Julie D.; Hallett, Sascha L.; Stocking, Richard W.; Xue, Lan; Bartholomew, Jerri L.

doi:10.3955/046.088.0305

Cited by 21 publications

(21 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overwintering mature (adult) polychaetes that consume myxospores in late fall or early winter are assumed to be the source of actinospores released in spring. The epidemiological model predicts that under future climate scenarios, numbers of infected polychaetes will be similar to the 2008 baseline (high), except under all maximum scenarios, when densities of infected polychaetes are predicted to be lower than the 2006 (low disease risk) baseline (Alexander et al 2014). This illustrates the importance of maximum discharge.…”

Section: Polychaete Hostsmentioning

confidence: 99%

Modeling the Effects of Climate Change on Disease Severity: A Case Study of Ceratonova (syn Ceratomyxa) shasta in the Klamath River

Ray

Alexander

Leenheer

et al. 2015

Myxozoan Evolution, Ecology and Development

Self Cite

View full text Add to dashboard Cite

Shifts in future temperature and precipitation patterns will have profound effects on host-parasite interactions and the dynamics of disease in freshwater systems. The aims of this chapter are to present an overview of myxozoan disease dynamics in the context of climate change, and to illustrate how these might be predicted over the next several decades by developing a case study of disease dynamics of Ceratonova (syn Ceratomyxa) shasta in the Klamath River, California USA. Our case study introduces a model ensemble for predicting changes in disease dynamics under different climate scenarios (warm/dry, moderate/median, and cool/wet) from 2020 to 2060. The ensemble uses Global Circulation Models (GCMs) and basin scaled models for the Klamath River to generate predictions for future water temperature and river discharge. The environmental data are used as inputs for a predictive model and a degree day model to simulate effects of climate change on polychaete host populations and on C. shasta spore viability, respectively. Outputs from these models were then used to parameterize an epidemiological model to predict changes in disease dynamics under each climate scenario. The epidemiological model outputs were measured against baselines established using real data for low (2006), high (2008) and intermediate (2011) disease risk years. In general, the epidemiological model predicts that except for infrequent high discharge years, C. shasta dynamics will be

show abstract

Section: Polychaete Hostsmentioning

confidence: 99%

Modeling the Effects of Climate Change on Disease Severity: A Case Study of Ceratonova (syn Ceratomyxa) shasta in the Klamath River

Ray

Alexander

Leenheer

et al. 2015

Myxozoan Evolution, Ecology and Development

Self Cite

View full text Add to dashboard Cite

show abstract

“…9). Higher temperatures can also lead to shifts in the invertebrate host distribution (Alexander et al, 2014) or in timing and duration of spore production and host-parasite interaction (Ray et al, 2015). Moreover, temperatures in Klamath River are already at the salmon's upper thermal limit (Ray et al, 2015), which makes the future of the salmon population in the river unclear.…”

Section: Climate Changementioning

confidence: 99%

“…It has been shown elsewhere that flow manipulation can be used for reducing the polychaete density (Alexander et al, 2014) or the spore concentration . Other management options, as for instance removing adult carcasses to reduce the myxospore input (Foott et al, 2016), have been shown to have little effect on the infection risk.…”

Section: Flow Manipulationmentioning

confidence: 99%

“…1016/j.ecocom.2019.100776 Received 4 April 2019; Received in revised form 30 July 2019; Accepted 31 July 2019 the disease has a high priority. Recent studies investigate the efficacy of removing adult carcasses to reduce the myxospore input into the system (Foott et al, 2016) and flow manipulation in order to reduce the polychaeta density (Alexander et al, 2014) or to reduce the spore concentration . The infection dynamics are greatly influenced by environmental factors such as temperature and water velocity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fish disease dynamics in changing rivers: Salmonid Ceratomyxosis in the Klamath River

Schakau

Hilker

Lewis

2019

Ecological Complexity

View full text Add to dashboard Cite

“…The construction of dams has tempered natural high flow events associated with winter precipitation and spring snow melt, and consequential scouring and movement of sediment rarely occurs. The resultant stable habitat favours the invertebrate host of C. shasta (Alexander et al 2014).…”

Section: Patterns and Dynamics Of Emerging Diseasesmentioning

confidence: 99%

Myxozoans on the Move: Dispersal Modes, Exotic Species and Emerging Diseases

Hallett

Hartigan

2015

Myxozoan Evolution, Ecology and Development

Self Cite

View full text Add to dashboard Cite

Increased global connectivity and shorter transportation times translate to a higher probability and frequency that hosts and their parasites will be introduced to foreign locations and will arrive viable. However, myxozoans are heteroxenous with two obligatory hosts and two free-living life stages, so even if a parasite is introduced, a myriad of factors must align for establishment to occur. Associated with successful introductions are ecological and economic impacts. Unless there is an established monitoring program, it is difficult to detect the emergence of a myxozoan before clinical signs become overt. In this chapter we examine features of myxozoan parasites that promote or impede dissemination and establishment. We present examples of modes of myxozoan introduction and dispersal, both natural and human-mediated. We review known and novel species responsible for emerging diseases, and recently identified species that have the potential to cause disease. We conclude by outlining strategies to understand and limit myxozoan introductions.

show abstract

Host and Parasite Populations After a Ten Year Flood:Manayunkia speciosaandCeratonova(synCeratomyxa)shastain the Klamath River

Cited by 21 publications

References 45 publications

Modeling the Effects of Climate Change on Disease Severity: A Case Study of Ceratonova (syn Ceratomyxa) shasta in the Klamath River

Modeling the Effects of Climate Change on Disease Severity: A Case Study of Ceratonova (syn Ceratomyxa) shasta in the Klamath River

Fish disease dynamics in changing rivers: Salmonid Ceratomyxosis in the Klamath River

Myxozoans on the Move: Dispersal Modes, Exotic Species and Emerging Diseases

Contact Info

Product

Resources

About