No time to dye: dye-induced light differences mediate growth rates among invasive macrophytes

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dc.contributor.authorCrane, Kate
dc.contributor.authorCuthbert, Ross N.
dc.contributor.authorCoughlan, Neil E.
dc.contributor.authorKregting, Louise
dc.contributor.authorReid, Neil
dc.contributor.authorRicciardi, Anthony
dc.contributor.authorMacIsaac, Hugh J.
dc.contributor.authorDick, Jaimie T.A.
dc.contributor.funderQueen's University Belfasten
dc.contributor.funderUniversity of Windsoren
dc.contributor.funderMcGill Universityen
dc.contributor.funderWaterways Irelanden
dc.contributor.funderAlexander von Humboldt-Stiftungen
dc.contributor.funderDepartment for the Economyen
dc.contributor.funderNatural Sciences and Engineering Research Council of Canadaen
dc.contributor.funderEnvironmental Protection Agencyen
dc.contributor.funderNatural Environment Research Councilen
dc.date.accessioned2022-03-14T11:58:26Z
dc.date.available2022-03-14T11:58:26Z
dc.date.issued2022-03-07
dc.date.updated2022-03-14T11:34:44Z
dc.description.abstractInvasive, submerged macrophytes negatively alter aquatic ecosystems and biodiversity through disruption of ecological structure and functioning. These plants are especially challenging and costly to control, with relatively few successful eradications. We examine the efficacy of dye treatments to control three invasive, submerged macrophyte species: Elodea canadensis Michx., Elodea nuttallii (Planchon) H. St. John and Lagarosiphon major (Ridley). Using an experimental mesocosm approach, growth rates of each species were monitored in relation to five light treatment groups: light, 1×, 2×, 3× dye dosage, and complete darkness (range: 270 to 0 μmol·m-2·s-1). Dye presence did not negate growth in any of the tested species, but the effects of treatments on invasive macrophyte growth rates differed across species. In dyed conditions, E. canadensis exhibited significantly greater increases in length compared to E. nuttallii and L. major, whilst E. nuttallii and L. major were lower and statistically similar. However, L. major significantly increased length relative to Elodea spp. in dark conditions. Similarly, for biomass changes, Elodea spp. gained significantly more biomass than L. major under light and dyed conditions, but not in the dark. Our findings suggest that the tested dye concentrations are not sufficient to halt the growth of these plants. However, under certain conditions, they could potentially help to reduce densities of invasive macrophytes by slowing growth rates and reducing biomass in select species. Differential responses to light could also help explain species replacement dynamics under varying environmental contexts. Overall, while further empirical research is required, management actions that reduce light could help control aquatic macrophytes in combination with other actions, but could also simultaneously mediate shifts in community assembly.en
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada (Discovery grants); Alexander von Humboldt Foundation (Fellowship); Environmental Protection Agency (2015-NC-MS-4);en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCrane, K., Cuthbert, R. N., Coughlan, N. E., Kregting, L., Reid, N., Ricciardi, A., MacIsaac, H. J. and Dick, J. T. A. (2022) 'No time to dye: dye-induced light differences mediate growth rates among invasive macrophytes', Management of Biological Invasions, 13. Available at: https://oceanrep.geomar.de/id/eprint/55457/1/MBI_2022_Crane_etal_correctedproof.pdf (Accessed: 14 March 2022)en
dc.identifier.eissn1989-8649
dc.identifier.journaltitleManagement of Biological Invasionsen
dc.identifier.urihttps://hdl.handle.net/10468/12898
dc.identifier.volume13en
dc.language.isoenen
dc.publisherRegional Euro-Asian Biological Invasions Centre (REABIC)en
dc.relation.urihttps://oceanrep.geomar.de/id/eprint/55457/1/MBI_2022_Crane_etal_correctedproof.pdf
dc.rights© 2022, Crane et al. This is an open access article distributed under terms of the Creative Commons Attribution License (Attribution 4.0 International - CC BY 4.0).en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectElodea canadensisen
dc.subjectElodea nuttalliien
dc.subjectFreshwatersen
dc.subjectLagarosiphon majoren
dc.subjectPlant controlen
dc.subjectRelative growth ratesen
dc.titleNo time to dye: dye-induced light differences mediate growth rates among invasive macrophytesen
dc.typeArticle (peer-reviewed)en
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