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dc.contributor.authorPratt, Daniel R.en_NZ
dc.contributor.authorLohrer, Andrew M.en_NZ
dc.contributor.authorThrush, Simon F.en_NZ
dc.contributor.authorHewitt, Judi E.en_NZ
dc.contributor.authorTownsend, Michaelen_NZ
dc.contributor.authorCartner, Katieen_NZ
dc.contributor.authorPilditch, Conrad A.en_NZ
dc.contributor.authorHarris, Rachel Joyen_NZ
dc.contributor.authorvan Colen, Carlen_NZ
dc.contributor.authorRodil, Iván F.en_NZ
dc.date.accessioned2015-08-04T00:45:00Z
dc.date.available2015en_NZ
dc.date.available2015-08-04T00:45:00Z
dc.date.issued2015en_NZ
dc.identifier.citationPratt, D. R., Lohrer, A. M., Thrush, S. F., Hewitt, J. E., Townsend, M., Cartner, K., … Rodil, I. F. (2015). Detecting subtle shifts in ecosystem functioning in a dynamic estuarine environment. PLoS ONE, 10(7). http://doi.org/10.1371/journal.pone.0133914en
dc.identifier.issn1932-6203en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/9514
dc.description.abstractIdentifying the effects of stressors before they impact ecosystem functioning can be challenging in dynamic, heterogeneous ‘real-world’ ecosystems. In aquatic systems, for example, reductions in water clarity can limit the light available for photosynthesis, with knock-on consequences for secondary consumers, though in naturally turbid wave-swept estuaries, detecting the effects of elevated turbidity can be difficult. The objective of this study was to investigate the effects of shading on ecosystem functions mediated by sandflat primary producers (microphytobenthos) and deep-dwelling surface-feeding macrofauna (Macomona liliana; Bivalvia, Veneroida, Tellinidae). Shade cloths (which reduced incident light intensity by ~80%) were deployed on an exposed, intertidal sandflat to experimentally stress the microphytobenthic community associated with the sediment surface. After 13 weeks, sediment properties, macrofauna and fluxes of oxygen and inorganic nutrients across the sediment-water interface were measured. A multivariate metric of ecosystem function (MF) was generated by combining flux-based response variables, and distance-based linear models were used to determine shifts in the drivers of ecosystem function between non-shaded and shaded plots. No significant differences in MF or in the constituent ecosystem function variables were detected between the shaded and non-shaded plots. However, shading reduced the total explained variation in MF (from 64% in non-shaded plots to 15% in shaded plots) and affected the relative influence of M. liliana and other explanatory variables on MF. This suggests that although shade stress may shift the drivers of ecosystem functioning (consistent with earlier investigations of shading effects on sandflat interaction networks), ecosystem functions appear to have a degree of resilience to those changes.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherPublic Library of Scienceen_NZ
dc.relation.urihttp://journals.plos.org/plosone/article?id=10.1371/journal.pone.0133914en_NZ
dc.rights© 2015 Pratt et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
dc.titleDetecting subtle shifts in ecosystem functioning in a dynamic estuarine environmenten_NZ
dc.typeJournal Article
dc.identifier.doi10.1371/journal.pone.0133914en_NZ
dc.relation.isPartOfPLoS ONEen_NZ
pubs.begin-pagee0133914en_NZ
pubs.elements-id129356
pubs.end-pagee0133914en_NZ
pubs.issue7en_NZ
pubs.volume10en_NZ
uow.identifier.article-noe0133914


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