Bioturbation, ecosystem functioning and community structure

CL Biles, David Maxwell Paterson, R B Ford, M Solan, D G Raffaelli

Research output: Contribution to journalArticlepeer-review

81 Citations (Scopus)


The effect of community structure on the functioning of the ecosystem is an important issue in ecology due to continuing global species loss. The influence of infaunal community structure on the functioning of marine systems is proposed here to act primarily through bioturbation of the sediment. Nutrient concentration in the water column, generated by release from the sediment, was used as a measure of ecosystem functioning. In situ and laboratory experiments showed a significant difference in nutrient concentrations with different species treatments. Bioturbation profiles showing the incorporation of tracer particles also differed between communities with different dominant species. The behavioural differences between infaunal species, generating different modes and rates of bioturbation, are therefore proposed to influence nutrient release. The presence and quantity of bioturbating infauna also influenced the amount of sediment suspended in the water column. The increase in surface area available for microbial activity may generate an increase in nutrient cycling. Abiotic influences on sediment structure, such as flow, may have a similar effect on nutrient concentration. Annular flumes used in both laboratory and in situ experiments to generate flow conditions produced a significant increase in ammonia (NH4-N) production in macrofaunal treatments. Flow may influence the behaviour of macrofaunal species, causing changes in NH4-N production through modifying bioturbation of the sediment.

Original languageEnglish
Pages (from-to)999-1005
Number of pages7
JournalJournal of Hydrology and Earth Systems Science
Issue number6
Publication statusPublished - Dec 2002


  • bioturbation
  • community structure
  • ecosystem functioning
  • estuaries
  • flow
  • infauna


Dive into the research topics of 'Bioturbation, ecosystem functioning and community structure'. Together they form a unique fingerprint.

Cite this