Phytoplankton dynamics in a subtropical lake dominated by cyanobacteria: cyanobacteria ‘Like it Hot’ and sometimes dry

Srifa, Akeapot; Phlips, Edward J.; Cichra, Mary F.; Hendrickson, John

doi:10.1007/s10452-016-9565-4

Cited by 25 publications

(22 citation statements)

References 33 publications

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“…Conversely, periods of high rainfall, watershed discharge and nutrient inputs from the watershed can be associated with lower peak phytoplankton biomass levels due to short water residence times. Similar relationships have been observed in two other ecosystems in Florida, the Guana, Tolomato, Matanzas estuary 41,74,75 and Lake George 17,76 . In both ecosystems the strong hurricane seasons of 2004 and 2005 yielded www.nature.com/scientificreports www.nature.com/scientificreports/ reduced peaks in phytoplankton biomass due to reduced water residence times, despite elevated concentrations of nutrients.…”

Section: Resultssupporting

confidence: 83%

Hurricanes, El Niño and harmful algal blooms in two sub-tropical Florida estuaries: Direct and indirect impacts

Phlips

Badylak

Nelson

et al. 2020

Sci Rep

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future increases in the intensity of hurricanes and el niño periods predicted by climate change models have focused attention on their role in stimulating harmful algal blooms (HABs). A series of hurricanes that recently impacted florida (USA) provided a unique opportunity to explore the relationships between hurricanes, el niño and HABs in two florida estuaries subject to repeated intense ecosystem disruptive HABs, the indian River Lagoon and the St. Lucie estuary. the roles that hurricanes and el niño play in contributing to HAB events are examined in the context of key structural and functional features of each estuary and their watersheds, including morphology, water residence time and hydrology, such as the influence of Lake Okeechobee discharges into the St. Lucie Estuary. The most direct impact was the increase in rainfall associated with hurricanes and el niño, resulting in enhanced nutrient loads which drive HABs in the indian River Lagoon and Lake okeechobee. Major HABs in Lake okeechobee also present an indirect threat of freshwater HAB blooms in the St. Lucie estuary via mandated discharges from the lake into the estuary during high rainfall periods. conversely, during the absence of HABs in Lake okeechobee, short water residence times produced by discharges into the St. Lucie estuary can result in lower bloom intensities.

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Section: Resultssupporting

confidence: 83%

Hurricanes, El Niño and harmful algal blooms in two sub-tropical Florida estuaries: Direct and indirect impacts

Phlips

Badylak

Nelson

et al. 2020

Sci Rep

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“…However, in contrast with Lake Okeechobee, the most intense blooms have occurred during years of below average rainfall and lower water levels [52]. In part, this pattern is attributable to the flow-through character of the lake, which has a major river inflow at the southern end (i.e., upper St. Johns River) and discharge into the lower St. Johns River at the northern end of the lake.…”

Section: Discussionmentioning

confidence: 92%

“…The flow-through regime results in overall shorter water turnover rates in Lake George than Lake Okeechobee, and larger differences in water turnover rates between high rainfall/high discharge periods versus low rainfall/low discharge periods [27]. Low discharge and water turnover rates in Lake George during lower than average rainfall periods increase the potential for the buildup of phytoplankton biomass in several ways [52]. The most direct effect relates to the need for sufficient time for relatively slow-growing filamentous (e.g., Anabaena flos-aquae, Planktothrix spp.)…”

Section: Discussionmentioning

confidence: 99%

Extreme Weather Events and Climate Variability Provide a Lens to How Shallow Lakes May Respond to Climate Change

Havens

Paerl

Phlips

et al. 2016

Water

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Shallow lakes, particularly those in low-lying areas of the subtropics, are highly vulnerable to changes in climate associated with global warming. Many of these lakes are in tropical cyclone strike zones and they experience high inter-seasonal and inter-annual variation in rainfall and runoff. Both of those factors strongly modulate sediment-water column interactions, which play a critical role in shallow lake nutrient cycling, water column irradiance characteristics and cyanobacterial harmful algal bloom (CyanoHAB) dynamics. We illustrate this with three examples, using long-term (15-25 years) datasets on water quality and plankton from three shallow lakes: Lakes Okeechobee and George (Florida, USA) and Lake Taihu (China). Okeechobee and Taihu have been impacted repeatedly by tropical cyclones that have resulted in large amounts of runoff and sediment resuspension, and resultant increases in dissolved nutrients in the water column. In both cases, when turbidity declined, major blooms of the toxic CyanoHAB Microcystis aeruginosa occurred over large areas of the lakes. In Lake George, periods of high rainfall resulted in high dissolved color, reduced irradiance, and increased water turnover rates which suppress blooms, whereas in dry periods with lower water color and water turnover rates there were dense cyanobacteria blooms. We identify a suite of factors which, from our experience, will determine how a particular shallow lake will respond to a future with global warming, flashier rainfall, prolonged droughts and stronger tropical cyclones.

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“…Regional conditions which may affect algal blooms include hydrologic events such as severe or long-lasting drought or highintensity rainstorms followed by calm weather [6][7][8][9]. The current literature addressing the hydrologic drivers of algal blooms focuses on precipitation, drought, and climate impacts on discharge and retention time [6,11,14,15,20]. The compounding effects of local nutrient sources, geomorphology, trophic state, or temperature may even result in seemingly contradictory results between various studies [7,21,22].…”

Section: Introductionmentioning

confidence: 99%

“…However, frequent flushing of the system may suppress growth of a bloom through colony dispersion or relocation to cooler or deeper waters [13,[29][30][31]. Inversely, when discharge declines and the reservoir retention time increases, thermal stratification and an increase in biomass may take place [20].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Relationships of Phytoplankton Blooms, Drought, and Rainstorms in Freshwater Reservoirs

Knapp

Milewski

2020

Water

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Algal blooms, especially those composed of toxic phytoplankton, are a global threat to eutrophic and mesotrophic freshwater reservoirs. While extreme hydrologic events such as flooding and drought have been shown to control bloom onset and success, the spatiotemporal dynamics of these relationships are still unclear for mesotrophic reservoirs. In this study, the relationships between hydrologic events and phytoplankton in Lake Allatoona and Lake Lanier, Georgia, United States, were characterized using historical and satellite datasets from 2008 to 2017 and statistical modeling. Results showed that the impact of stormflow and rainstorm events varied systematically from riverine to lacustrine reaches of the two reservoirs on weekly and monthly scales. Precipitation duration and stormflow were the most significant and best-fitting predictors of algal bloom biomass in deeper reaches of the two reservoirs, suggesting that algal blooms in more lacustrine environments may be better equipped for wet and stormy regimes than has been previously hypothesized.

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Phytoplankton dynamics in a subtropical lake dominated by cyanobacteria: cyanobacteria ‘Like it Hot’ and sometimes dry

Cited by 25 publications

References 33 publications

Hurricanes, El Niño and harmful algal blooms in two sub-tropical Florida estuaries: Direct and indirect impacts

Hurricanes, El Niño and harmful algal blooms in two sub-tropical Florida estuaries: Direct and indirect impacts

Extreme Weather Events and Climate Variability Provide a Lens to How Shallow Lakes May Respond to Climate Change

Spatiotemporal Relationships of Phytoplankton Blooms, Drought, and Rainstorms in Freshwater Reservoirs

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