Climate-driven variation in the phenology of juvenile Ixodes pacificus on lizard hosts
2024

How Climate Affects Tick Seasons in California

Sample size: 1527 publication Evidence: moderate

Author Information

Author(s): Sambado Samantha, Sparkman Amanda, Swei Andrea, MacDonald Andrew J, Young Hillary S, Salomon Jordan, Crews Arielle, Ring Kacie, Copeland Stephanie, Briggs Cheryl J

Hypothesis

Juvenile tick phenology varies across climates and influences pathogen transmission.

Conclusion

The study reveals significant regional variation in juvenile I. pacificus phenology across California, influenced by local climate.

Supporting Evidence

  • Mean tick abundance per lizard ranged from 0.17 to 47.21 across locations.
  • Peak nymphal abundance occurred 25 days earlier than peak larval abundance in the San Francisco Bay Area.
  • Higher temperatures and increased drought stress were linked to lower tick abundances.

Takeaway

Ticks are sensitive to climate changes, and this study shows how their seasons differ in California based on the weather.

Methodology

Ticks were removed from lizards at 45 locations and analyzed using Generalized Additive Models to assess climate effects.

Participant Demographics

Lizards were the primary hosts for juvenile ticks in California.

Digital Object Identifier (DOI)

10.21203/rs.3.rs-5671938

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