K E Havens
Affiliation: South Florida Water Management District
- Nutrient dynamics and the eutrophication of shallow lakes Kasumigaura (Japan), Donghu (PR China), and Okeechobee (USA)K E Havens
South Florida Water Management District, PO Box 24680, West Palm Beach, FL 33416 4680, USA
Environ Pollut 111:263-72. 2001..Furthermore, accurate predictions of management impacts in shallow eutrophic lakes may require the use of relatively complex deterministic modeling tools...
- Stable isotope food web analysis of a large subtropical lake: alternative explanations for 15N enrichment of pelagic vs. littoral fisheriesKarl E Havens
South Florida Water Management District, 3301 Gun Club Road, West Palm Beach, Florida 33406, USA
ScientificWorldJournal 3:613-22. 2003..4 per thousand per trophic level, and normalizing to the delta15N of primary consumers...
- Large-scale mapping and predictive modeling of submerged aquatic vegetation in a shallow eutrophic lakeKarl E Havens
South Florida Water Management District, West Palm Beach, FL 33406, USA
ScientificWorldJournal 2:949-65. 2002..The simple modeling approach could serve as a coarse-scale tool for evaluating effects of water level management on Chara populations...
- Zooplankton structure and potential food web interactions in the plankton of a subtropical chain-of-lakesKarl E Havens
Watershed Management Department, South Florida Water Management District, West Palm Beach, FL 33496, USA
ScientificWorldJournal 2:926-42. 2002....
- Complex analyses of plankton structure and functionK E Havens
South Florida Water Management District, West Palm Beach, Florida 33416 4680, USA
ScientificWorldJournal 1:119-32. 2001....
- N:P ratios, light limitation, and cyanobacterial dominance in a subtropical lake impacted by non-point source nutrient pollutionKarl E Havens
South Florida Water Management District, West Palm Beach, Florida 33406, USA
Environ Pollut 122:379-90. 2003..In the near-shore regions of this shallow lake, low N:P ratios potentially favor blooms of N2-fixing cyanobacteria, but their occurrence in the pelagic zone is restricted by low irradiance and lack of stable stratification...
- Complex interactions between autotrophs in shallow marine and freshwater ecosystems: implications for community responses to nutrient stressK E Havens
South Florida Water Management District, 3301 Gun Club Road, West Palm Beach, FL 33416 4680, USA
Environ Pollut 113:95-107. 2001....
- Hurricane effects on a shallow lake ecosystem and its response to a controlled manipulation of water levelK E Havens
South Florida Water Management District, 3301 Gun Club Road, West Palm Beach, Florida 3346 4680, USA
ScientificWorldJournal 1:44-70. 2001..In regions where these events are common (e.g., the tropics and subtropics), consideration should be given to how they might affect long-term lake management programs...
- The importance of considering biological processes when setting total maximum daily loads (TMDL) for phosphorus in shallow lakes and reservoirsK E Havens
Department of Ecosystem Restoration, South Florida Water Management District, 3301 Gun Club Road, PO Box 24680, West Palm Beach, FL 33416, USA
Environ Pollut 113:1-9. 2001..If some of these biological changes can be reversed in a rehabilitation program then the lake may be able to support a higher TMDL...
- Modeling water resources: have we got it right?K E Havens
South Florida Watet Management District, West Palm Beach, Florida 33416 4680, USA
ScientificWorldJournal 1:5-6. 2001..Hence, there may be a tendency to use simple empirical models for decision making. An example of eutrophication management in lakes illustrates a pitfall of this approach when used independently of other scientific information...
- A reevaluation of the cultural eutrophication of Lake Okeechobee using multiproxy sediment recordsDaniel R Engstrom
St Croix Watershed Research Station, Science Museum of Minnesota, Marine on St Croix, Minnesota 55047, USA
Ecol Appl 16:1194-206. 2006..The results contradict recent claims that the lake's trophic state has not changed over time, as well as the assertion that sediments of large shallow lakes cannot support a reliable chronology of past events...
- Plankton food web responses to experimental nutrient additions in a subtropical lakeKarl E Havens
University of Florida, Department of Fisheries and Aquatic Sciences, Gainesville, FL, USA
ScientificWorldJournal 6:827-33. 2006..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...
- Cyanobacterial toxins: a qualitative meta-analysis of concentrations, dosage and effects in freshwater, estuarine and marine biotaBas W Ibelings
Netherlands Institute of Ecology NIOO KNAW Centre for Limnology, Rijksstraatweg 6, 3631 AC, Nieuwersluis, The Netherlands
Adv Exp Med Biol 619:675-732. 2008..Bivalves appear remarkably resistant, whilst the harmful effects of cyanobacteria on zooplankton vary widely and the specific contribution of toxins is hard to evaluate...
- Cyanobacteria blooms: effects on aquatic ecosystemsKarl E Havens
Department of Fisheries and Aquatic Sciences, University of Florida, 7922 NW 71st Street, Gainesville, FL 32653, USA
Adv Exp Med Biol 619:733-47. 2008..These areas require additional research given the prevalence of toxic blooms in the nation's lakes, rivers and coastal waters--systems that provide a wide range of valued ecosystem services...