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Eutrophication governs predator-prey interactions and temperature effects in Aedes aegypti populations

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Eutrophication governs predator-prey interactions and temperature effects in Aedes aegypti populations. / Krol, Louie; Gorsich, Erin E.; Hunting, Ellard R.; Govender, Danny; Van Bodegom, Peter M.; Schrama, Maarten.

In: Parasites and Vectors, Vol. 12, No. 1, 179, 24.04.2019.

Research output: Contribution to journalArticle

Harvard

Krol, L, Gorsich, EE, Hunting, ER, Govender, D, Van Bodegom, PM & Schrama, M 2019, 'Eutrophication governs predator-prey interactions and temperature effects in Aedes aegypti populations', Parasites and Vectors, vol. 12, no. 1, 179. https://doi.org/10.1186/s13071-019-3431-x

APA

Krol, L., Gorsich, E. E., Hunting, E. R., Govender, D., Van Bodegom, P. M., & Schrama, M. (2019). Eutrophication governs predator-prey interactions and temperature effects in Aedes aegypti populations. Parasites and Vectors, 12(1), [179]. https://doi.org/10.1186/s13071-019-3431-x

Vancouver

Krol L, Gorsich EE, Hunting ER, Govender D, Van Bodegom PM, Schrama M. Eutrophication governs predator-prey interactions and temperature effects in Aedes aegypti populations. Parasites and Vectors. 2019 Apr 24;12(1). 179. https://doi.org/10.1186/s13071-019-3431-x

Author

Krol, Louie ; Gorsich, Erin E. ; Hunting, Ellard R. ; Govender, Danny ; Van Bodegom, Peter M. ; Schrama, Maarten. / Eutrophication governs predator-prey interactions and temperature effects in Aedes aegypti populations. In: Parasites and Vectors. 2019 ; Vol. 12, No. 1.

Bibtex

@article{e0fc100344444a828a98127d45309f4f,
title = "Eutrophication governs predator-prey interactions and temperature effects in Aedes aegypti populations",
abstract = "Background: Mosquito population dynamics are driven by large-scale (e.g. climatological) and small-scale (e.g. ecological) factors. While these factors are known to independently influence mosquito populations, it remains uncertain how drivers that simultaneously operate under natural conditions interact to influence mosquito populations. We, therefore, developed a well-controlled outdoor experiment to assess the interactive effects of two ecological drivers, predation and nutrient availability, on mosquito life history traits under multiple temperature regimes. Methods: We conducted a temperature-controlled mesocosm experiment in Kruger National Park, South Africa, with the yellow fever mosquito, Aedes aegypti. We investigated how larval survival, emergence and development rates were impacted by the presence of a locally-common invertebrate predator (backswimmers Anisops varia Fieber (Notonectidae: Hemiptera), nutrient availability (oligotrophic vs eutrophic, reflecting field conditions), water temperature, and interactions between each driver. Results: We observed that the effects of predation and temperature both depended on eutrophication. Predation caused lower adult emergence in oligotrophic conditions but higher emergence under eutrophic conditions. Higher temperatures caused faster larval development rates in eutrophic but not oligotrophic conditions. Conclusions: Our study shows that ecological bottom-up and top-down drivers strongly and interactively govern mosquito life history traits for Ae. aegypti populations. Specifically, we show that eutrophication can inversely affect predator-prey interactions and mediate the effect of temperature on mosquito survival and development rates. Hence, our results suggest that nutrient pollution can overrule biological constraints on natural mosquito populations and highlights the importance of studying multiple factors.",
keywords = "Anthropogenic pressures, Biodiversity decline, Ecological drivers, Interaction effects, Temperature, Vector-borne",
author = "Louie Krol and Gorsich, {Erin E.} and Hunting, {Ellard R.} and Danny Govender and {Van Bodegom}, {Peter M.} and Maarten Schrama",
year = "2019",
month = "4",
day = "24",
doi = "10.1186/s13071-019-3431-x",
language = "English",
volume = "12",
journal = "Parasites and Vectors",
issn = "1756-3305",
publisher = "BioMed Central",
number = "1",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Eutrophication governs predator-prey interactions and temperature effects in Aedes aegypti populations

AU - Krol, Louie

AU - Gorsich, Erin E.

AU - Hunting, Ellard R.

AU - Govender, Danny

AU - Van Bodegom, Peter M.

AU - Schrama, Maarten

PY - 2019/4/24

Y1 - 2019/4/24

N2 - Background: Mosquito population dynamics are driven by large-scale (e.g. climatological) and small-scale (e.g. ecological) factors. While these factors are known to independently influence mosquito populations, it remains uncertain how drivers that simultaneously operate under natural conditions interact to influence mosquito populations. We, therefore, developed a well-controlled outdoor experiment to assess the interactive effects of two ecological drivers, predation and nutrient availability, on mosquito life history traits under multiple temperature regimes. Methods: We conducted a temperature-controlled mesocosm experiment in Kruger National Park, South Africa, with the yellow fever mosquito, Aedes aegypti. We investigated how larval survival, emergence and development rates were impacted by the presence of a locally-common invertebrate predator (backswimmers Anisops varia Fieber (Notonectidae: Hemiptera), nutrient availability (oligotrophic vs eutrophic, reflecting field conditions), water temperature, and interactions between each driver. Results: We observed that the effects of predation and temperature both depended on eutrophication. Predation caused lower adult emergence in oligotrophic conditions but higher emergence under eutrophic conditions. Higher temperatures caused faster larval development rates in eutrophic but not oligotrophic conditions. Conclusions: Our study shows that ecological bottom-up and top-down drivers strongly and interactively govern mosquito life history traits for Ae. aegypti populations. Specifically, we show that eutrophication can inversely affect predator-prey interactions and mediate the effect of temperature on mosquito survival and development rates. Hence, our results suggest that nutrient pollution can overrule biological constraints on natural mosquito populations and highlights the importance of studying multiple factors.

AB - Background: Mosquito population dynamics are driven by large-scale (e.g. climatological) and small-scale (e.g. ecological) factors. While these factors are known to independently influence mosquito populations, it remains uncertain how drivers that simultaneously operate under natural conditions interact to influence mosquito populations. We, therefore, developed a well-controlled outdoor experiment to assess the interactive effects of two ecological drivers, predation and nutrient availability, on mosquito life history traits under multiple temperature regimes. Methods: We conducted a temperature-controlled mesocosm experiment in Kruger National Park, South Africa, with the yellow fever mosquito, Aedes aegypti. We investigated how larval survival, emergence and development rates were impacted by the presence of a locally-common invertebrate predator (backswimmers Anisops varia Fieber (Notonectidae: Hemiptera), nutrient availability (oligotrophic vs eutrophic, reflecting field conditions), water temperature, and interactions between each driver. Results: We observed that the effects of predation and temperature both depended on eutrophication. Predation caused lower adult emergence in oligotrophic conditions but higher emergence under eutrophic conditions. Higher temperatures caused faster larval development rates in eutrophic but not oligotrophic conditions. Conclusions: Our study shows that ecological bottom-up and top-down drivers strongly and interactively govern mosquito life history traits for Ae. aegypti populations. Specifically, we show that eutrophication can inversely affect predator-prey interactions and mediate the effect of temperature on mosquito survival and development rates. Hence, our results suggest that nutrient pollution can overrule biological constraints on natural mosquito populations and highlights the importance of studying multiple factors.

KW - Anthropogenic pressures

KW - Biodiversity decline

KW - Ecological drivers

KW - Interaction effects

KW - Temperature

KW - Vector-borne

UR - http://www.scopus.com/inward/record.url?scp=85064873733&partnerID=8YFLogxK

U2 - 10.1186/s13071-019-3431-x

DO - 10.1186/s13071-019-3431-x

M3 - Article

VL - 12

JO - Parasites and Vectors

JF - Parasites and Vectors

SN - 1756-3305

IS - 1

M1 - 179

ER -