HR: 14:30h
AN: B13A-05    [Abstracts]
TI: Aquatic Plants and Animals as Ecosystem Engineers
AU: * Wotton, R S
EM: r.wotton@ucl.ac.uk
AF: University College London (UCL), Department of Biology, Darwin Building, Gower Street, London, WC1E 6BT United Kingdom
AB: Studies on aquatic plants and animals focus on population dynamics, the structure of communities and the part played by organisms in food webs and other ecosystem processes. As Lawton and Jones point out in "Linking Species and Ecosystems", less attention is given to the role of organisms as ecosystem engineers, modifying the environment in which they live. Yet plants can have a profound effect on their surroundings, altering flow patterns and trapping large amounts of organic and inorganic material. Animals also affect aquatic ecosystems in many ways, both in building structures such as tubes and shelters, and in their feeding. For example, detritus feeders often produce large numbers of faecal pellets (and pseudofaeces in bivalves) and these are very different in size to the materials ingested. Pellets are deposited in masses over the bed of streams, lakes and the sea and therefore effect a translocation of nutrients. The action of plants and animals in altering their environment is likely to be a significant process in all water bodies, from both small to large scale.
DE: 1815 Erosion and sedimentation
DE: 1899 General or miscellaneous
DE: 4211 Benthic boundary layers
DE: 4815 Ecosystems, structure and dynamics
SC: Biogeosciences [B]
MN: 2005 Joint Assembly