K
Karl E. Havens
Researcher at University of Florida
Publications - 179
Citations - 13701
Karl E. Havens is an academic researcher from University of Florida. The author has contributed to research in topics: Zooplankton & Plankton. The author has an hindex of 48, co-authored 179 publications receiving 11804 citations. Previous affiliations of Karl E. Havens include Kent State University & West Virginia University.
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Journal ArticleDOI
Controlling Eutrophication: Nitrogen and Phosphorus
Daniel J. Conley,Hans W. Paerl,Robert W. Howarth,Donald F. Boesch,Sybil P. Seitzinger,Karl E. Havens,Christiane Lancelot,Gene E. Likens +7 more
TL;DR: Improvements in the water quality of many freshwater and most coastal marine ecosystems requires reductions in both nitrogen and phosphorus inputs.
Journal ArticleDOI
Lake responses to reduced nutrient loading - an analysis of contemporary long-term data from 35 case studies
Erik Jeppesen,Martin Søndergaard,Jens Peder Jensen,Karl E. Havens,Orlane Anneville,Laurence Carvalho,Michael F. Coveney,Rainer Deneke,Martin T. Dokulil,Bob Foy,Daniel Gerdeaux,Stephanie E. Hampton,Sabine Hilt,Külli Kangur,Jan Köhler,E. Lammens,Torben L. Lauridsen,Marina Manca,Maria Rosa Miracle,Brian Moss,Peeter Nõges,Gunnar Persson,Geoff Phillips,Rob Portielje,Susana Romo,Claire L. Schelske,Dietmar Straile,István Tátrai,Eva Willén,Monika Winder +29 more
TL;DR: In this article, the authors examined 35 long-term (5-35 years, mean: 16 years) lake re-oligotrophication studies and found that external total phosphorus loading resulted in lower in-lake TP concentration, lower chlorophyll a (chl a) concentration and higher Secchi depth in most lakes.
Journal ArticleDOI
Rapid and highly variable warming of lake surface waters around the globe
Catherine M. O'Reilly,Sapna Sharma,Derek K. Gray,Stephanie E. Hampton,Jordan S. Read,Rex J. Rowley,Philipp Schneider,John D. Lenters,Peter B. McIntyre,Benjamin M. Kraemer,Gesa A. Weyhenmeyer,Dietmar Straile,Bo Dong,Rita Adrian,Mathew Grant Allan,Orlane Anneville,Lauri Arvola,Jay A. Austin,John L. Bailey,Jill S. Baron,Justin D. Brookes,Elvira de Eyto,Martin T. Dokulil,David P. Hamilton,Karl E. Havens,Amy L. Hetherington,Scott N. Higgins,Simon J. Hook,Lyubov R. Izmest'eva,Klaus Joehnk,Külli Kangur,Peter Kasprzak,Michio Kumagai,Esko Kuusisto,George Leshkevich,David M. Livingstone,Sally Macintyre,Linda May,John M. Melack,Doerthe C. Mueller-Navarra,Mikhail A. Naumenko,Peeter Nõges,Tiina Nõges,Ryan P. North,Pierre-Denis Plisnier,Anna Rigosi,Alon Rimmer,Michela Rogora,Lars G. Rudstam,James A. Rusak,Nico Salmaso,Nihar R. Samal,Daniel E. Schindler,S. Geoffrey Schladow,Martin Schmid,Silke R. Schmidt,Eugene A. Silow,M. Evren Soylu,Katrin Teubner,Piet Verburg,Ari Voutilainen,A. J. Watkinson,Craig E. Williamson,Guoqing Zhang +63 more
TL;DR: In the first worldwide synthesis of in situ and satellite-derived lake data, this paper found that lake summer surface water temperatures rose rapidly (global mean = 0.34°C decade−1) between 1985 and 2009.
Journal ArticleDOI
Allied attack: climate change and eutrophication
Brian Moss,Sarian Kosten,Mariana Meerhoff,Richard W. Battarbee,Erik Jeppesen,Néstor Mazzeo,Karl E. Havens,Gissell Lacerot,Zhengwen Liu,L. De Meester,Hans W. Paerl,Marten Scheffer +11 more
TL;DR: In this paper, global warming and eutrophication in fresh and coastal waters may mutually reinforce the symptoms they express and thus the problems they cause, which may cause more problems.
Journal ArticleDOI
It Takes Two to Tango: When and Where Dual Nutrient (N & P) Reductions Are Needed to Protect Lakes and Downstream Ecosystems
Hans W. Paerl,J. Thad Scott,Mark J. McCarthy,Silvia E. Newell,Wayne S. Gardner,Karl E. Havens,Daniel K. Hoffman,Steven W. Wilhelm,Wayne A. Wurtsbaugh +8 more
TL;DR: Managers should consider whether balanced control of N and P will most effectively reduce HABs along the freshwater-marine continuum, supported by studies indicating that biological N fixation cannot always meet lake ecosystem N needs, and that anthropogenic N andP loading has increased dramatically in recent decades.