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Climatic variability and landscape heterogeneity impact urban mosquito diversity and vector abundance and infection

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Title: Climatic variability and landscape heterogeneity impact urban mosquito diversity and vector abundance and infection
Authors: Chaves, Luis Fernando Browse this author →ORCID
Hamer, Gabriel L. Browse this author
Walker, Edward D. Browse this author
Brown, William M. Browse this author
Ruiz, Marilyn O. Browse this author
Kitron, Uriel D. Browse this author
Keywords: Chicago
entomological risk
habitat gradient
Rift Valley fever
Schmalhausen’s law
West Nile virus
Issue Date: 23-Jun-2011
Journal Title: Ecosphere
Volume: 2
Issue: 6
Start Page: art70
Publisher DOI: 10.1890/ES11-00088.1
Abstract: Urban habitat heterogeneity can modify interactions across species and lead to spatially fine grained differences in b-diversity patterns and their associated ecosystem services. Here, we study the impacts of landscape heterogeneity and climatic variability on: (1) the richness and diversity patterns of mosquitoes (Diptera: Culicidae) and (2) the abundance and West Nile virus infection rate of the house mosquito, Culex pipiens, in Chicago, USA. We conducted a four year long study (2005–2008) in 8 sites that captured a gradient of urban heterogeneities. We found a total of 19 mosquito species, a representative sample of mosquito species richness in the area, according to both model estimation (Chao2 +- S.E. = 20.50 +- 2.29) and faunal records for Chicago. We found that heterogeneity in the landscape was the best predictor of both mosquito species richness and diversity, with the most heterogeneous landscapes harboring the largest number of species. In general there were no changes in species richness over the years that could be associated with weather patterns and climatic variability (WPCV). In contrast, changes in diversity were associated with WPCV. Our results also showed that WPCV had major impacts on house mosquito abundance and West Nile virus mosquito infection rate (MIR) patterns. Although MIR was independent of mosquito diversity, it was associated with overall mosquito abundance, which had a convex association with species richness (i.e., abundance increases to a point after which it decreases as function of species richness). Finally, our results highlight the importance of considering dominant vector species as part of a community of vectors, whose biodiversity patterns can directly or indirectly impact the risk of infectious disease transmission.
Rights: Copyright by the Ecological Society of America
Type: article
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Luis Fernando CHAVES

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