Warming impact on herbivore population composition affects top-down control by predators

Abstract Understanding warming impact on herbivores facilitates predicting plant/crop dynamics in natural/agricultural systems. However, it remains unclear how warming will affect herbivore population size and population composition, consequently altering herbivore colonization in a tri-trophic syst...

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Autores principales:	Ying-Jie Wang, Takefumi Nakazawa, Chuan-Kai Ho
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b37aebd48eea4710a20d905224733ebb
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spelling	oai:doaj.org-article:b37aebd48eea4710a20d905224733ebb2021-12-02T16:06:03ZWarming impact on herbivore population composition affects top-down control by predators10.1038/s41598-017-01155-y2045-2322https://doaj.org/article/b37aebd48eea4710a20d905224733ebb2017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01155-yhttps://doaj.org/toc/2045-2322Abstract Understanding warming impact on herbivores facilitates predicting plant/crop dynamics in natural/agricultural systems. However, it remains unclear how warming will affect herbivore population size and population composition, consequently altering herbivore colonization in a tri-trophic system (plant-herbivore-predator or crop-pest-biocontrol agent). We studied a soybean-aphid-lady beetle system, by conducting (1) a laboratory warming experiment to examine warming impact (+2 °C or +4 °C) on the aphid population size and composition (alate proportion), and (2) a field colonization experiment to examine whether the warming-induced effect subsequently interacts with predators (lady beetles) in affecting aphid colonization. The results showed that warming affected the initial aphid population composition (reduced alate proportion) but not population size; this warming-induced effect strengthened the top-down control by lady beetles and slowing aphid colonization. In other words, biocontrol on crop pests by predators could improve under 2–4 °C warming. Furthermore, aphid colonization was affected by an interaction between the alate proportion and predator (lady beetle) presence. This study suggests that warming affects herbivore population composition and likely mediates top-down control on herbivore colonization by predators. This mechanism may be crucial but underappreciated in climate change ecology because population composition (wing form, sex ratio, age/body size structure) shifts in many species under environmental change.Ying-Jie WangTakefumi NakazawaChuan-Kai HoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ying-Jie Wang Takefumi Nakazawa Chuan-Kai Ho Warming impact on herbivore population composition affects top-down control by predators
description	Abstract Understanding warming impact on herbivores facilitates predicting plant/crop dynamics in natural/agricultural systems. However, it remains unclear how warming will affect herbivore population size and population composition, consequently altering herbivore colonization in a tri-trophic system (plant-herbivore-predator or crop-pest-biocontrol agent). We studied a soybean-aphid-lady beetle system, by conducting (1) a laboratory warming experiment to examine warming impact (+2 °C or +4 °C) on the aphid population size and composition (alate proportion), and (2) a field colonization experiment to examine whether the warming-induced effect subsequently interacts with predators (lady beetles) in affecting aphid colonization. The results showed that warming affected the initial aphid population composition (reduced alate proportion) but not population size; this warming-induced effect strengthened the top-down control by lady beetles and slowing aphid colonization. In other words, biocontrol on crop pests by predators could improve under 2–4 °C warming. Furthermore, aphid colonization was affected by an interaction between the alate proportion and predator (lady beetle) presence. This study suggests that warming affects herbivore population composition and likely mediates top-down control on herbivore colonization by predators. This mechanism may be crucial but underappreciated in climate change ecology because population composition (wing form, sex ratio, age/body size structure) shifts in many species under environmental change.
format	article
author	Ying-Jie Wang Takefumi Nakazawa Chuan-Kai Ho
author_facet	Ying-Jie Wang Takefumi Nakazawa Chuan-Kai Ho
author_sort	Ying-Jie Wang
title	Warming impact on herbivore population composition affects top-down control by predators
title_short	Warming impact on herbivore population composition affects top-down control by predators
title_full	Warming impact on herbivore population composition affects top-down control by predators
title_fullStr	Warming impact on herbivore population composition affects top-down control by predators
title_full_unstemmed	Warming impact on herbivore population composition affects top-down control by predators
title_sort	warming impact on herbivore population composition affects top-down control by predators
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b37aebd48eea4710a20d905224733ebb
work_keys_str_mv	AT yingjiewang warmingimpactonherbivorepopulationcompositionaffectstopdowncontrolbypredators AT takefuminakazawa warmingimpactonherbivorepopulationcompositionaffectstopdowncontrolbypredators AT chuankaiho warmingimpactonherbivorepopulationcompositionaffectstopdowncontrolbypredators
_version_	1718385170319409152

Warming impact on herbivore population composition affects top-down control by predators

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