期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 110, 期 16, 页码 6448-6452出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1216006110
关键词
extreme precipitation events; climate change; aquatic ecology; Microcystis sp.; Anabaena sp.
资金
- National Science Foundation (NSF) [1039043, 1313897]
- NSF [0927643]
- National Oceanic and Atmospheric Administration Center [NA07OAR432000]
- Lake Erie Protection Fund [SG 4062011]
- US Department of Energy
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1313897] Funding Source: National Science Foundation
- Division Of Ocean Sciences
- Directorate For Geosciences [0927643] Funding Source: National Science Foundation
- Div Of Biological Infrastructure
- Direct For Biological Sciences [1034791] Funding Source: National Science Foundation
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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