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Download Improved understanding of large-scale trophic succession through
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Levin, L. A., IOD, Scripps Inst. Ocean., La Jolla, CA, USA, [email protected] Currin, C., Nat. Ocean Service, NOAA, Beaufort, NC, [email protected] Neira, C. IOD, Scripps Inst. Ocean., La Jolla, CA, USA, [email protected] McMillan, P., IOD, Scripps Inst. Ocean., La Jolla, CA, USA, [email protected] Mendoza, G., IOD, Scripps Inst. Ocean., La Jolla, CA, USA, [email protected] Whitcraft, C., IOD, Scripps Inst. Ocean., La Jolla, CA, USA, [email protected] Gonzalez, J., IOD, Scripps Inst. Ocean., La Jolla, CA, USA, [email protected] Carman, K., Dept. of Biol. Sci, LSU, Baton Rouge, LA, USA, [email protected] IMPROVED UNDERSTANDING OF LARGE-SCALE TROPHIC SUCCESSION THROUGH SMALL-SCALE ISOTOPIC ENRICHMENT EXPERIMENTS Of the many factors regulating succession in benthic marine communities, food has commanded relatively little attention. In California tidal wetlands, disturbance, restoration and plant invasions induce shifts from microalgal-dominated to plant-covered sediments. By enriching algae or bacteria with C-13 and Spartina or cyanobacteria with N-15, we are able to identify those infaunal taxa that preferentially feed on each food source, or C and N derived from these. Experimental results combined with time-series community data reveal that large-scale shifts in community structure in restored salt marshes (from insect to annelid-dominated assemblages) and Spartina-invaded tidal wetlands (from surface to subsurface feeders) are likely to be caused by changes in food availability. 2003 Am. Society of Limnology and Oceanography Meeting
