Interactions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.

<h4>Background</h4>Dispersal is a primary driver in shaping the future distribution of species in both terrestrial and marine systems. Physical transport by advection can regulate the distance travelled and rate of propagule supply to a habitat but post-settlement processes such as preda...

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Autores principales:	Antony M Knights, Louise B Firth, Keith Walters
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2ad9283d117b446698672013642daa9f
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spelling	oai:doaj.org-article:2ad9283d117b446698672013642daa9f2021-11-18T07:22:58ZInteractions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.1932-620310.1371/journal.pone.0035096https://doaj.org/article/2ad9283d117b446698672013642daa9f2012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22493734/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Dispersal is a primary driver in shaping the future distribution of species in both terrestrial and marine systems. Physical transport by advection can regulate the distance travelled and rate of propagule supply to a habitat but post-settlement processes such as predation can decouple supply from recruitment. The effect of flow-mediated recruitment and predation on the recruitment success of an intertidal species, the eastern oyster Crassostrea virginica was evaluated in two-replicated field experiments. Two key crab species were manipulated to test predator identity effects on oyster mortality.<h4>Findings</h4>Recruitment was ∼58% higher in high flow compared to low flow, but predation masked those differences. Predation mortality was primarily attributed to the blue crab Callinectes sapidus, whilst the mud crab Panopeus herbstii had no effect on recruit mortality. Recruit mortality from predation was high when recruit densities were high, but when recruit density was low, predation effects were not seen. Under high recruitment (supply), predation determined maximum population size and in low flow environments, recruitment success is likely determined by a combination of recruitment and resource limitation but not predation.<h4>Conclusions</h4>Four processes are demonstrated: (1) Increases in flow rate positively affect recruitment success; (2) In high flow (recruitment) environments, resource availability is less important than predation; (3) predation is an important source of recruit mortality, but is dependent upon recruit density; and (4) recruitment and/or resource limitation is likely a major driver of population structure and functioning, modifying the interaction between predators and prey. Simultaneous testing of flow-mediated recruitment and predation was required to differentiate between the role of each process in determining population size. Our results reinforce the importance of propagule pressure, predation and post-settlement mortality as important determinants of population growth and persistence, but demonstrate that they should not be considered mutually exclusive.Antony M KnightsLouise B FirthKeith WaltersPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 4, p e35096 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Antony M Knights Louise B Firth Keith Walters Interactions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.
description	<h4>Background</h4>Dispersal is a primary driver in shaping the future distribution of species in both terrestrial and marine systems. Physical transport by advection can regulate the distance travelled and rate of propagule supply to a habitat but post-settlement processes such as predation can decouple supply from recruitment. The effect of flow-mediated recruitment and predation on the recruitment success of an intertidal species, the eastern oyster Crassostrea virginica was evaluated in two-replicated field experiments. Two key crab species were manipulated to test predator identity effects on oyster mortality.<h4>Findings</h4>Recruitment was ∼58% higher in high flow compared to low flow, but predation masked those differences. Predation mortality was primarily attributed to the blue crab Callinectes sapidus, whilst the mud crab Panopeus herbstii had no effect on recruit mortality. Recruit mortality from predation was high when recruit densities were high, but when recruit density was low, predation effects were not seen. Under high recruitment (supply), predation determined maximum population size and in low flow environments, recruitment success is likely determined by a combination of recruitment and resource limitation but not predation.<h4>Conclusions</h4>Four processes are demonstrated: (1) Increases in flow rate positively affect recruitment success; (2) In high flow (recruitment) environments, resource availability is less important than predation; (3) predation is an important source of recruit mortality, but is dependent upon recruit density; and (4) recruitment and/or resource limitation is likely a major driver of population structure and functioning, modifying the interaction between predators and prey. Simultaneous testing of flow-mediated recruitment and predation was required to differentiate between the role of each process in determining population size. Our results reinforce the importance of propagule pressure, predation and post-settlement mortality as important determinants of population growth and persistence, but demonstrate that they should not be considered mutually exclusive.
format	article
author	Antony M Knights Louise B Firth Keith Walters
author_facet	Antony M Knights Louise B Firth Keith Walters
author_sort	Antony M Knights
title	Interactions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.
title_short	Interactions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.
title_full	Interactions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.
title_fullStr	Interactions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.
title_full_unstemmed	Interactions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.
title_sort	interactions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/2ad9283d117b446698672013642daa9f
work_keys_str_mv	AT antonymknights interactionsbetweenmultiplerecruitmentdriverspostsettlementpredationmortalityandflowmediatedrecruitment AT louisebfirth interactionsbetweenmultiplerecruitmentdriverspostsettlementpredationmortalityandflowmediatedrecruitment AT keithwalters interactionsbetweenmultiplerecruitmentdriverspostsettlementpredationmortalityandflowmediatedrecruitment
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Interactions between multiple recruitment drivers: post-settlement predation mortality and flow-mediated recruitment.

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