Impact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio

Abstract In an assemblage of multiple predators sharing a single prey species, the combined effects of the component species may scale unpredictably because of emergent interspecific interactions. Prior studies suggest that chaotic but persistent community dynamics are induced by intra-/interspecifi...

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Autores principales:	Yao Zhuo Zhang, Zhengya Jin, James Rudolph Miksanek, Midori Tuda
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/871daab411a7449f9459f8b9d5e1901a
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spelling	oai:doaj.org-article:871daab411a7449f9459f8b9d5e1901a2021-12-05T12:12:40ZImpact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio10.1038/s41598-021-02713-12045-2322https://doaj.org/article/871daab411a7449f9459f8b9d5e1901a2021-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02713-1https://doaj.org/toc/2045-2322Abstract In an assemblage of multiple predators sharing a single prey species, the combined effects of the component species may scale unpredictably because of emergent interspecific interactions. Prior studies suggest that chaotic but persistent community dynamics are induced by intra-/interspecific interactions between native and nonnative parasitoids competing over a shared host. Here, we test the impact of the nonnative parasitoid Heterospilus prosopidis (Hymenoptera: Braconidae) on the intraspecific interference and offspring sex ratio of the native parasitoid Anisopteromalus calandrae (Hymenoptera: Pteromalidae). We found that the nonnative parasitoid reduced intraspecific interference among native parasitoids and decreased the proportion of female offspring produced by the native parasitoid (predicted under conditions of reduced host availability). At higher host densities, the nonnative parasitoid contributed less to the total proportion of hosts parasitized, as its innate saturating Type II response changed to a dome-shaped Type IV response with increasing density of the native parasitoid, while the native parasitoid retained its increasing Type I response. This inverse host-density-dependent response between the two parasitoids and associated competitive superiority can explain the observed changes in parasitism; at high host densities, the searching efficiency of the native parasitoid increases via host feeding while the nonnative parasitoid experiences egg limitation. These results highlight the importance of the complementary top-down effects of multiple consumers on a single resource.Yao Zhuo ZhangZhengya JinJames Rudolph MiksanekMidori TudaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yao Zhuo Zhang Zhengya Jin James Rudolph Miksanek Midori Tuda Impact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio
description	Abstract In an assemblage of multiple predators sharing a single prey species, the combined effects of the component species may scale unpredictably because of emergent interspecific interactions. Prior studies suggest that chaotic but persistent community dynamics are induced by intra-/interspecific interactions between native and nonnative parasitoids competing over a shared host. Here, we test the impact of the nonnative parasitoid Heterospilus prosopidis (Hymenoptera: Braconidae) on the intraspecific interference and offspring sex ratio of the native parasitoid Anisopteromalus calandrae (Hymenoptera: Pteromalidae). We found that the nonnative parasitoid reduced intraspecific interference among native parasitoids and decreased the proportion of female offspring produced by the native parasitoid (predicted under conditions of reduced host availability). At higher host densities, the nonnative parasitoid contributed less to the total proportion of hosts parasitized, as its innate saturating Type II response changed to a dome-shaped Type IV response with increasing density of the native parasitoid, while the native parasitoid retained its increasing Type I response. This inverse host-density-dependent response between the two parasitoids and associated competitive superiority can explain the observed changes in parasitism; at high host densities, the searching efficiency of the native parasitoid increases via host feeding while the nonnative parasitoid experiences egg limitation. These results highlight the importance of the complementary top-down effects of multiple consumers on a single resource.
format	article
author	Yao Zhuo Zhang Zhengya Jin James Rudolph Miksanek Midori Tuda
author_facet	Yao Zhuo Zhang Zhengya Jin James Rudolph Miksanek Midori Tuda
author_sort	Yao Zhuo Zhang
title	Impact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio
title_short	Impact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio
title_full	Impact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio
title_fullStr	Impact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio
title_full_unstemmed	Impact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio
title_sort	impact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/871daab411a7449f9459f8b9d5e1901a
work_keys_str_mv	AT yaozhuozhang impactofanonnativeparasitoidspeciesonintraspecificinterferenceandoffspringsexratio AT zhengyajin impactofanonnativeparasitoidspeciesonintraspecificinterferenceandoffspringsexratio AT jamesrudolphmiksanek impactofanonnativeparasitoidspeciesonintraspecificinterferenceandoffspringsexratio AT midorituda impactofanonnativeparasitoidspeciesonintraspecificinterferenceandoffspringsexratio
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Impact of a nonnative parasitoid species on intraspecific interference and offspring sex ratio

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