Record-setting algal bloom in Lake Erie caused by agricultural and meteorological trends consistent with expected future conditions.

نویسندگان

  • Anna M Michalak
  • Eric J Anderson
  • Dmitry Beletsky
  • Steven Boland
  • Nathan S Bosch
  • Thomas B Bridgeman
  • Justin D Chaffin
  • Kyunghwa Cho
  • Rem Confesor
  • Irem Daloglu
  • Joseph V Depinto
  • Mary Anne Evans
  • Gary L Fahnenstiel
  • Lingli He
  • Jeff C Ho
  • Liza Jenkins
  • Thomas H Johengen
  • Kevin C Kuo
  • Elizabeth Laporte
  • Xiaojian Liu
  • Michael R McWilliams
  • Michael R Moore
  • Derek J Posselt
  • R Peter Richards
  • Donald Scavia
  • Allison L Steiner
  • Ed Verhamme
  • David M Wright
  • Melissa A Zagorski
چکیده

In 2011, Lake Erie experienced the largest harmful algal bloom in its recorded history, with a peak intensity over three times greater than any previously observed bloom. Here we show that long-term trends in agricultural practices are consistent with increasing phosphorus loading to the western basin of the lake, and that these trends, coupled with meteorological conditions in spring 2011, produced record-breaking nutrient loads. An extended period of weak lake circulation then led to abnormally long residence times that incubated the bloom, and warm and quiescent conditions after bloom onset allowed algae to remain near the top of the water column and prevented flushing of nutrients from the system. We further find that all of these factors are consistent with expected future conditions. If a scientifically guided management plan to mitigate these impacts is not implemented, we can therefore expect this bloom to be a harbinger of future blooms in Lake Erie.

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عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 110 16  شماره 

صفحات  -

تاریخ انتشار 2013