Aulacaspis yasumatsui Invasion Reduced Cycas micronesica Microstrobilus Size and Pollinator Brood Site Competence

Aulacaspis yasumatsui Takagi invaded Guam in 2003, and the influence on survival and demography of the host Cycas micronesica K.D. Hill population has been well-studied. To more fully understand how A. yasumatsui has threatened the host cycad...

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Autores principales:	Thomas E. Marler, L. Irene Terry
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	<i>Anatrachyntis</i> brood site pollination coextinction invasive species Science Q
Acceso en línea:	https://doaj.org/article/d692c194c43e4c8e956080862be22ac0
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id	oai:doaj.org-article:d692c194c43e4c8e956080862be22ac0
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spelling	oai:doaj.org-article:d692c194c43e4c8e956080862be22ac02021-11-25T17:59:53Z<i>Aulacaspis yasumatsui</i> Invasion Reduced <i>Cycas micronesica</i> Microstrobilus Size and Pollinator Brood Site Competence10.3390/insects121110232075-4450https://doaj.org/article/d692c194c43e4c8e956080862be22ac02021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4450/12/11/1023https://doaj.org/toc/2075-4450<i>Aulacaspis yasumatsui</i> Takagi invaded Guam in 2003, and the influence on survival and demography of the host <i>Cycas micronesica</i> K.D. Hill population has been well-studied. To more fully understand how <i>A. yasumatsui</i> has threatened the host cycad species, we determined the microstrobilus size and number of pollinators per microstrobilus from 2001 to 2021. The microstrobilus height and diameter were measured directly, and the volume was calculated. Microstrobili were 58 cm in height, 13 cm in diameter, and 4740 cm<sup>3</sup> in volume prior to direct <i>A. yasumatsui</i> infestations. Microstrobili decreased in size immediately after direct infestations by <i>A. yasumatsui</i>, and then began to slowly increase in size until 2021. For example, the volume was 24% of pre-invasion volume in 2007, and was 57% of pre-invasion volume in 2021. Microstrobili were harvested; then, the number of pollinator pupae were counted after an incubation period. Pollinator pupae counts per microstrobilus declined to 66% of pre-invasion levels by 2007 and have remained similarly constrained through 2021. Our results revealed that <i>A. yasumatsui</i> damage to the host <i>C. micronesica</i> population is not limited to attrition of the extant plant population, but also includes a loss in male reproductive effort and the risk of coextinction of the insular pollinator.Thomas E. MarlerL. Irene TerryMDPI AGarticle<i>Anatrachyntis</i>brood site pollinationcoextinctioninvasive speciesScienceQENInsects, Vol 12, Iss 1023, p 1023 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	<i>Anatrachyntis</i> brood site pollination coextinction invasive species Science Q
spellingShingle	<i>Anatrachyntis</i> brood site pollination coextinction invasive species Science Q Thomas E. Marler L. Irene Terry <i>Aulacaspis yasumatsui</i> Invasion Reduced <i>Cycas micronesica</i> Microstrobilus Size and Pollinator Brood Site Competence
description	<i>Aulacaspis yasumatsui</i> Takagi invaded Guam in 2003, and the influence on survival and demography of the host <i>Cycas micronesica</i> K.D. Hill population has been well-studied. To more fully understand how <i>A. yasumatsui</i> has threatened the host cycad species, we determined the microstrobilus size and number of pollinators per microstrobilus from 2001 to 2021. The microstrobilus height and diameter were measured directly, and the volume was calculated. Microstrobili were 58 cm in height, 13 cm in diameter, and 4740 cm<sup>3</sup> in volume prior to direct <i>A. yasumatsui</i> infestations. Microstrobili decreased in size immediately after direct infestations by <i>A. yasumatsui</i>, and then began to slowly increase in size until 2021. For example, the volume was 24% of pre-invasion volume in 2007, and was 57% of pre-invasion volume in 2021. Microstrobili were harvested; then, the number of pollinator pupae were counted after an incubation period. Pollinator pupae counts per microstrobilus declined to 66% of pre-invasion levels by 2007 and have remained similarly constrained through 2021. Our results revealed that <i>A. yasumatsui</i> damage to the host <i>C. micronesica</i> population is not limited to attrition of the extant plant population, but also includes a loss in male reproductive effort and the risk of coextinction of the insular pollinator.
format	article
author	Thomas E. Marler L. Irene Terry
author_facet	Thomas E. Marler L. Irene Terry
author_sort	Thomas E. Marler
title	<i>Aulacaspis yasumatsui</i> Invasion Reduced <i>Cycas micronesica</i> Microstrobilus Size and Pollinator Brood Site Competence
title_short	<i>Aulacaspis yasumatsui</i> Invasion Reduced <i>Cycas micronesica</i> Microstrobilus Size and Pollinator Brood Site Competence
title_full	<i>Aulacaspis yasumatsui</i> Invasion Reduced <i>Cycas micronesica</i> Microstrobilus Size and Pollinator Brood Site Competence
title_fullStr	<i>Aulacaspis yasumatsui</i> Invasion Reduced <i>Cycas micronesica</i> Microstrobilus Size and Pollinator Brood Site Competence
title_full_unstemmed	<i>Aulacaspis yasumatsui</i> Invasion Reduced <i>Cycas micronesica</i> Microstrobilus Size and Pollinator Brood Site Competence
title_sort	<i>aulacaspis yasumatsui</i> invasion reduced <i>cycas micronesica</i> microstrobilus size and pollinator brood site competence
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d692c194c43e4c8e956080862be22ac0
work_keys_str_mv	AT thomasemarler iaulacaspisyasumatsuiiinvasionreducedicycasmicronesicaimicrostrobilussizeandpollinatorbroodsitecompetence AT lireneterry iaulacaspisyasumatsuiiinvasionreducedicycasmicronesicaimicrostrobilussizeandpollinatorbroodsitecompetence
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<i>Aulacaspis yasumatsui</i> Invasion Reduced <i>Cycas micronesica</i> Microstrobilus Size and Pollinator Brood Site Competence

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