Table of Contents Author Guidelines Submit a Manuscript
Volume 6 (2006), Pages 827-833
Short Communication

Plankton Food Web Responses to Experimental Nutrient Additions in a Subtropical Lake

1University of Florida, Department of Fisheries and Aquatic Sciences, Gainesville, FL, USA
2South Florida Water Management District, West Palm Beach, FL, USA

Received 15 May 2006; Revised 10 July 2006; Accepted 10 July 2006

Academic Editor: Gea-Jae Joo

Copyright © 2006 Karl E. Havens and Therese L East.


During two controlled enclosure experiments using water from a subtropical lake, the plankton food web displayed a highly variable response to combined addition of nitrogen and phosphorus. In July, the nutrients stimulated growth of Cylindrospermopsis raciborskii, and the biomass of macrozooplankton and microbial food web components did not increase. In October, the same addition of nutrients stimulated growth of small edible Lyngbya spp., and there were coincident increases in biomass of macrozooplankton and components of the microbial web. Past generalizations that cyanobacteria blooms inhibit growth of other food web components may not always hold true.