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Haemosporidian Infection Risk Variation Across an Urban Gradient in a Songbird.

Wilmer Stanley Amaya-Mejia1, Lillian Ma1, Sara Freimuth1

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Summary
This summary is machine-generated.

Urbanization reduces avian parasite biodiversity, favoring generalist pathogens. Local habitat features, not broad urbanization, influenced Plasmodium infections in dark-eyed juncos.

Keywords:
avian infectious disease ecologydark‐eyed juncosurban ecologyvector ecology

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Area of Science:

  • Ecology
  • Parasitology
  • Urban Biology

Background:

  • Urbanization drives environmental changes and avian community shifts.
  • The impact of urbanization on avian disease ecology and parasite communities is understudied.
  • Understanding these impacts is crucial for avian health and disease transmission.

Purpose of the Study:

  • To investigate how urbanization influences avian parasite diversity and infection prevalence.
  • To compare the effects of urbanization on host-generalist (Plasmodium) and host-specialist (Haemoproteus) parasites.
  • To assess the role of local habitat characteristics and vector abundance in urban disease ecology.

Main Methods:

  • Comparative analysis of Plasmodium and Haemoproteus diversity and infection in dark-eyed juncos across an urbanization gradient.
  • Assessment of host-generalist vs. host-specialist parasite responses to urbanization.
  • Monitoring of vector abundance (Culex tarsalis) in relation to urbanization and rainfall.

Main Results:

  • Fewer Haemoproteus infections were observed in urban habitats, indicating increased homogenization of specialist parasites.
  • Plasmodium infections showed no correlation with urbanization but increased with rainfall.
  • Local biotic factors (wing chord length, human presence) influenced Plasmodium infections, while local habitat characteristics had limited effects.

Conclusions:

  • Urbanization decreases avian parasite biodiversity, favoring generalist pathogen lineages.
  • Local habitat characteristics play a role in shaping Plasmodium infection dynamics.
  • Further research into urban disease transmission and vector ecology is warranted.