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How do local differences in saltmarsh ecology influence disease vector mosquito populations?

Citation

Rowbottom, R and Carver, S and Barmuta, LA and Weinstein, P and Allen, GR, How do local differences in saltmarsh ecology influence disease vector mosquito populations?, Medical and Veterinary Entomology, 34, (3) pp. 279-290. ISSN 0269-283X (2020) [Refereed Article]

Copyright Statement

Copyright 2020 The Royal Entomological Society

DOI: doi:10.1111/mve.12433

Abstract

Saltmarsh breeding mosquitoes are an important source of vectors for arboviral transmission. In southern Australia, the most prominent vector borne disease, Ross River virus (Togaviridae: Alphavirus) (RRV), is transmitted by the saltmarsh mosquito (Diptera: Culicidae) Aedes camptorhynchus (Thomson). However, the factors driving the abundance of this mosquito within and among saltmarshes are poorly understood. To predict the abundance of this mosquito within saltmarshes, the environmental conditions and aquatic invertebrate ecology of three temperate saltmarshes habitats were monitored over two seasons. Up to 44% of first‐instar mosquito numbers and 21% of pupal numbers were accounted for by environmental variables. Samphire vegetation cover was a common predictor of first‐instar numbers across sites although, between saltmarshes, aquatic factors such as high salinity, temperatures less than 22 C and water body volume were important predictors. The identified predictors of pupal numbers were more variable and included high tides, waterbody volume and alkalinity. The composition of invertebrate functional feeding groups differed between saltmarshes and showed that an increased diversity led to fewer mosquitoes. It was evident that apparently similar saltmarshes can vary markedly in invertebrate assemblages, water availability and conditions through tidal inundations, rainfall or waterbody permanency. The present study advances insight into predictors of vector mosquito numbers that drive the risk of RRV outbreaks.

Item Details

Item Type:Refereed Article
Keywords:Aedes camptorhynchus, functional feeding groups, habitat comparison, RRV, seasonal variability, Tasmania
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Community ecology (excl. invasive species ecology)
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Control of pests, diseases and exotic species in coastal and estuarine environments
UTAS Author:Rowbottom, R (Mrs Raylea Rowbottom)
UTAS Author:Carver, S (Dr Scott Carver)
UTAS Author:Barmuta, LA (Associate Professor Leon Barmuta)
UTAS Author:Allen, GR (Associate Professor Geoff Allen)
ID Code:137617
Year Published:2020
Deposited By:Agriculture and Food Systems
Deposited On:2020-02-24
Last Modified:2021-09-22
Downloads:0

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