Bioturbation, ecosystem functioning and community structure

C. L. Biles, D. M. Paterson, R. B. Ford, Martin Solan, D. G. Raffaelli

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

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 pages6
JournalHydrology and Earth System Sciences
Volume6
Issue number6
DOIs
Publication statusPublished - 2002

Keywords

  • bioturbation
  • community structure
  • ecosystem functioning
  • estuaries
  • flow
  • infauna
  • deposit
  • biodiversity
  • sediments
  • behavior
  • bivalvia
  • fluxes

Cite this

Biles, C. L., Paterson, D. M., Ford, R. B., Solan, M., & Raffaelli, D. G. (2002). Bioturbation, ecosystem functioning and community structure. Hydrology and Earth System Sciences, 6(6), 999-1005. https://doi.org/10.5194/hess-6-999-2002