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Sedimentary Environment Influences the Effect of an Infaunal Suspension Feeding Bivalve on Estuarine Ecosystem Function

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  • Hannah F E Jones
  • Conrad A Pilditch
  • Denise A Bruesewitz
  • Andrew M Lohrer

Abstract

The suspension feeding bivalve Austrovenus stutchburyi is a key species on intertidal sandflats in New Zealand, affecting the appearance and functioning of these systems, but is susceptible to several environmental stressors including sedimentation. Previous studies into the effect of this species on ecosystem function have been restricted in space and time, limiting our ability to infer the effect of habitat change on functioning. We examined the effect of Austrovenus on benthic primary production and nutrient dynamics at two sites, one sandy, the other composed of muddy-sand to determine whether sedimentary environment alters this key species' role. At each site we established large (16 m2) plots of two types, Austrovenus addition and removal. In winter and summer we deployed light and dark benthic chambers to quantify oxygen and nutrient fluxes and measured sediment denitrification enzyme activity to assess denitrification potential. Rates of gross primary production (GPP) and ammonium uptake were significantly increased when Austrovenus was added, relative to removed, at the sandy site (GPP, 1.5 times greater in winter and summer; ammonium uptake, 8 times greater in summer; 3-factor analysis of variance (ANOVA), p

Suggested Citation

  • Hannah F E Jones & Conrad A Pilditch & Denise A Bruesewitz & Andrew M Lohrer, 2011. "Sedimentary Environment Influences the Effect of an Infaunal Suspension Feeding Bivalve on Estuarine Ecosystem Function," PLOS ONE, Public Library of Science, vol. 6(10), pages 1-15, October.
    • Handle: RePEc:plo:pone00:0027065
    DOI: 10.1371/journal.pone.0027065
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    References listed on IDEAS

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    1. Andrew M. Lohrer & Simon F. Thrush & Max M. Gibbs, 2004. "Bioturbators enhance ecosystem function through complex biogeochemical interactions," Nature, Nature, vol. 431(7012), pages 1092-1095, October.
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    1. Geange, Shane & Townsend, Michael & Clark, Dana & Ellis, Joanne I. & Lohrer, Andrew M., 2019. "Communicating the value of marine conservation using an ecosystem service matrix approach," Ecosystem Services, Elsevier, vol. 35(C), pages 150-163.

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