Search Results - "Havens, K. E."

Nutrient dynamics and the eutrophication of shallow lakes Kasumigaura (Japan), Donghu (PR China), and Okeechobee (USA) by HAVENS, K. E, FUKUSHIMA, T, XIE, P, IWAKUMA, T, JAMES, R. T, TAKAMURA, N, HANAZATO, T, YAMAMOTO, T

“…We compared the nutrient dynamics of three lakes that have been heavily influenced by point and non-point source pollution and other human activities. The…”
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The importance of considering biological processes when setting total maximum daily loads (TMDL) for phosphorus in shallow lakes and reservoirs by Havens, K.E., Schelske, C.L.

“…Biological processes affect lake phosphorous assimilation. Total maximum daily loads (TMDL) are required by the US Environmental Protection Agency for…”
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Complex interactions between autotrophs in shallow marine and freshwater ecosystems: implications for community responses to nutrient stress by Havens, K.E., Hauxwell, J., Tyler, A.C., Thomas, S., McGlathery, K.J., Cebrian, J., Valiela, I., Steinman, A.D., Hwang, Soon-Jin

“…Complex interactions between phytoplankton, attached algae, and vascular plants affect ecosystem responses to nutrient stress. The relative biomass of…”
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First report about freshwater Bryozoa in Florida (Lake Apopka) by Taticchi, M. I., Elia, A. C., Battoe, L., Havens, K. E.

“…This study reports the first information on Phylactolaemata from Florida. Bryozoan floatoblasts were collected from Lake Apopka in February 2007 with a large…”
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Correlation is not causation: a case study of fisheries, trophic state and acidity in Florida (USA) lakes by Havens, K.E

“…Environmental pollution studies are often based on observational data and correlative statistics that indicate relationships between pollutants and ecological…”
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Secondary nitrogen limitation in a subtropical lake impacted by non-point source agricultural pollution by Havens, Karl E.

“…A 20-year history of nutrient limitation was quantified for Lake Okeechobee, a nutrient-impacted lake in Florida, USA. Limiting status (nitrogen versus…”
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Size Structure and Energetics in a Plankton Food Web by Havens, Karl E.

“…Studies were conducted to quantify how the size distribution of plankton affects ecological transfer efficiency in the pelagic food web. Simultaneous…”
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Summer zooplankton dynamics in the limnetic and littoral zones of a humic acid lake by HAVENS, K. E

“…The limnetic and littoral zooplankton were studied during summer 1989 in Triangle Lake, a humic acid (pH 4.9) bog lake in Ohio, USA. The limnetic zooplankton…”
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Food Web Structure in a Subtropical Lake Ecosystem by Havens, K. E., Bull, L. A., Warren, G. L., Crisman, T. L., Phlips, E. J., Smith, J. P.

“…This study considered trophic interactions in the pelagic and littoral regions of Lake Okeechobee, a large subtropical lake ecosystem in Florida, USA. Food web…”
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Relative efficiencies of carbon transfer from bacteria and algae to zooplankton in a subtropical lake by Havens, Karl E., Work, Kirsten A., East, Therese L.

“…Direct measurements were made of carbon transfer efficiency from bacteria and algae to zooplankton in subtropical Lake Okeechobee, Florida, USA. A radio-tracer…”
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Predator-Prey Relationships in Natural Community Food Webs by Havens, Karl E.

“…Fifty non-aggregated community food webs, containing from 10 to 74 species, were analyzed in order to determine the effects of web size and species' trophic…”
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FRESHWATER BRYOZOA (PHYLACTOLAEMATA) FROM CENTRAL FLORIDA LAKES by Taticchi, M. I., Battoe, L., Elia, A. C., Havens, K. E.

“…Eight lakes in central Florida were inspected for their freshwater bryozoan faunal composition. Floatoblasts were sampled by means of a special bryozoan…”
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Phosphorus-Algal Bloom Relationships in Large Lakes of South Florida: Implications for Establishing Nutrient Criteria by Havens, Karl E.

“…A simple cross-tabulation procedure was used to examine the relationship between total phosphorus (TP) concentration and algal bloom frequencies, based on…”
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Light availability as a possible regulator of cyanobacteria species composition in a shallow subtropical lake by Havens, Karl E., Phlips, Edward J., Cichra, Mary F., Li, Bai-lian

“…1. Variations in the relative biovolumes of dominant cyanobacterial taxa were evaluated in the context of environmental conditions using canonical correlation…”
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Hurricane effects on a shallow lake ecosystem and its response to a controlled manipulation of water level by Havens, K E, Jin, K R, Rodusky, A J, Sharfstein, B, Brady, M A, East, T L, Iricanin, N, James, R T, Harwell, M C, Steinman, A D

“…In order to reverse the damage to aquatic plant communities caused by multiple years of high water levels in Lake Okeechobee, Florida (U.S.), the Governing…”
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The Phosphorus-Chlorophyll Relationship in Lakes: Potential Influences of Color and Mixing Regime by Havens, Karl E., Nürnberg, Gertrud K.

“…We used summer epilimnetic means from a large dataset (369 lakes from North America, Europe, Asia, and New Zealand) to examine whether color or mixing regime…”
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The role of aluminium contamination in determining phytoplankton and zooplankton responses to acidification by HAVENS, K. E, DECOSTA, J

“…Experiments were carried out on the neutral O'Woods lake in West Virginia using three in situ enclosures which were respectively untreated, acidified to pH…”
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Complex analyses of plankton structure and function by Havens, K E

“…This paper critically evaluates some complex methods that have been used to characterize the structure and function of freshwater plankton communities. The…”
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Modeling water resources: have we got it right? by Havens, K E

“…Aquatic scientists generally recognize that controlled experiments are required to establish cause-effect relationships (e.g., Havens and Aumen, 2000), and…”
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Rapid Ecological Changes in a Large Subtropical Lake Undergoing Cultural Eutrophication by Havens, Karl E., Aumen, Nicholas G., R. Thomas James, Smith, Val H.

“…This paper describes how human activities have impacted the ecological state of a large subtropical lake, Lake Okeechobee, Florida, USA. Since the early 1900s,…”
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