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- W812853959 abstract "Macrofauna are known to have a significant effect on intertidalsediment stability and biogeochemical properties. A series of manipulative insitu mudflat studies at Breydon Water, Great Yarmouth, UK investigated theeffect of biodiversity on selected biogeochemical sedimentary propertiesrelated to mudflat sediment stability including the sediment erosion thresholdand relative erosion rate, microphytobenthos biomass and health, sedimentparticle size and size distribution, sediment water content, chlorophyll a andb concentration, and colloidal carbohydrate concentration. Mudflat sedimentmacrofaunal biomass was removed using cryo-defaunation and theabundances of three common mudflat species Hediste diversicolor, Hydrobiaulvae and Corophium volutator manipulated to examine different aspects ofmacrofaunal biodiversity including species identity, density, biomassdistribution, and richness. An additional laboratory study enabled two andthree dimensional high resolution visualisation of fluid and particle mixing asa result of organism sediment bioturbation.Species identity was found to have a significant effect on sedimentproperties. The three species have distinct bioturbatory actions withconsequences for sediment stability. In some circumstances a singleorganism was found to have as great an effect on selected ecosystemprocesses as a whole community. Variations in species density significantlychanged the effect of the species on the measured sedimentary processes.Species richness effects were negatively interactive, with species mixturesunderyielding in comparison to their monoculture counterparts. Changes inspecies biomass distribution and richness resulted in significant contextdependent changes to sediment properties, moderated by inter- and intraspecificinteractions. Species were also observed to exhibit a functionalabundance threshold, below which they did not contribute significantly toecosystem processes. Temporal and spatial variability observed in theexperiments emphasised the potential of environmental and abiotic factors toalso influence ecosystem processes. Investigating these subtle aspects ofbiodiversity will be key in the determination of the relationship betweenbiodiversity and ecosystem processes." @default.
- W812853959 created "2016-06-24" @default.
- W812853959 creator A5005366896 @default.
- W812853959 date "2013-11-01" @default.
- W812853959 modified "2023-09-28" @default.
- W812853959 title "The influence of macrofauna on intertidal sediment stability and biogeochemical properties." @default.
- W812853959 hasPublicationYear "2013" @default.
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