Importance of climate change-physical forcing on the increase of cyanobacterial blooms in a small, stratified lake

Planas, Dolors; Paquet, Serge

doi:10.4081/jlimnol.2016.1371

Cited by 19 publications

(19 citation statements)

References 63 publications

(71 reference statements)

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“…The ecological impact of thermocline formation can be profoundly magnified when hypolimnetic anoxia releases phosphorus from the sediments and spurs noxious algal blooms [36]. Whether a hypolimnion goes anoxic depends on several factors.…”

Section: Model Runs and Output Variablesmentioning

confidence: 99%

Effects of Climate Change on Lake Thermal Structure and Biotic Response in Northern Wilderness Lakes

Edlund

Almendinger

Fang

et al. 2017

Water

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Climate disrupts aquatic ecosystems directly through changes in temperature, wind, and precipitation, and indirectly through watershed effects. Climate-induced changes in northern lakes include longer ice-free season, stronger stratification, browning, shifts in algae, and more cyanobacterial blooms. We compared retrospective temperature-depth relationships modeled using MINLAKE2012 with biogeochemical changes recorded in sediment cores. Four lakes in Voyageurs National Park (VOYA) and four lakes in Isle Royale National Park (ISRO) were studied. Meteorological data from International Falls and Duluth, Minnesota, were used for VOYA and ISRO, respectively. Model output was processed to analyze epilimnetic and hypolimnetic water temperatures and thermal gradients between two periods . Common trends were increased summer epilimnion temperatures and, for deep lakes, increased frequency and duration of thermoclines. Changes in diatom communities differed between shallow and deep lakes and the parks. Based on changes in benthic and tychoplanktonic communities, shallow lake diatoms respond to temperature, mixing events, pH, and habitat. Changes in deep lakes are evident in the deep chlorophyll layer community of Cyclotella and Discostella species, mirroring modeled changes in thermocline depth and stability, and in Asterionella and Fragilaria species, reflecting the indirect effects of in-lake and watershed nutrient cycling and spring mixing.

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Section: Model Runs and Output Variablesmentioning

confidence: 99%

Effects of Climate Change on Lake Thermal Structure and Biotic Response in Northern Wilderness Lakes

Edlund

Almendinger

Fang

et al. 2017

Water

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“…Lake water quality in the SAG and AT areas may not decrease when considering population growth predictions. However, this study does not take into account several parameters that can impact blue-green algae blooms in lakes, such as the lake water residence time, chemical threshold processes, and the warming of the water column (Planas and Paquet, 2016).…”

Section: Discussionmentioning

confidence: 99%

Impacts of changes in groundwater recharge on the isotopic composition and geochemistry of seasonally ice-covered lakes: insights for sustainable management

Arnoux

Barbecot²,

Gibert-Brunet

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. Lakes are under increasing pressure due to widespread anthropogenic impacts related to rapid development and population growth. Accordingly, many lakes are currently undergoing a systematic decline in water quality. Recent studies have highlighted that global warming and the subsequent changes in water use may further exacerbate eutrophication in lakes. Lake evolution depends strongly on hydrologic balance, and therefore on groundwater connectivity. Groundwater also influences the sensitivity of lacustrine ecosystems to climate and environmental changes, and governs their resilience. Improved characterization of groundwater exchange with lakes is needed today for lake preservation, lake restoration, and sustainable management of lake water quality into the future. In this context, the aim of the present paper is to determine if the future evolution of the climate, the population, and the recharge could modify the geochemistry of lakes (mainly isotopic signature and quality via phosphorous load) and if the isotopic monitoring of lakes could be an efficient tool to highlight the variability of the water budget and quality.Small groundwater-connected lakes were chosen to simulate changes in water balance and water quality expected under future climate change scenarios, namely representative concentration pathways (RCPs) 4.5 and 8.5. Contemporary baseline conditions, including isotope mass balance and geochemical characteristics, were determined through an intensive field-based research program prior to the simulations. Results highlight that future lake geochemistry and isotopic composition trends will depend on four main parameters: location (and therefore climate conditions), lake catchment size (which impacts the intensity of the flux change), lake volume (which impacts the range of variation), and lake G index (i.e., the percentage of groundwater that makes up total lake inflows), the latter being the dominant control on water balance conditions, as revealed by the sensitivity of lake isotopic composition. Based on these model simulations, stable isotopes appear to be especially useful for detecting changes in recharge to lakes with a G index of between 50 and 80 %, but response is non-linear. Simulated monthly trends reveal that evolution of annual lake isotopic composition can be dampened by opposing monthly recharge fluctuations. It is also shown that changes in water quality in groundwaterconnected lakes depend significantly on lake location and on the intensity of recharge change.

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“…Therefore, depending on the time scale, intensity and duration of the event, phytoplankton in the upper layer should receive little or no "benefit from the upwelled nutrient rich hypolimnetic waters" (Haffner et al, 1984). As a consequence, it is important to understand and assess when upwellings are efficient fertilizers of the euphotic zone as it has been recorded in various ecosystems (Planas and Paquet, 2016;Valipour et al, 2016). In addition, we should consider that special attention needs to be paid to the horizontal mixing occurring during and just after the upwelling event.…”

Section: Upwelling Event In Summer 2009mentioning

confidence: 99%

Using 3D modeling and remote sensing capabilities for a better understanding of spatio-temporal heterogeneities of phytoplankton abundance in large lakes

Soulignac

Danis

Bouffard

et al. 2018

Journal of Great Lakes Research

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Lake biological parameters show important spatio-temporal heterogeneities. This is why explaining the spatial patchiness of phytoplankton abundance has been a recurrent ecological issue and is an essential prerequisite for objectively assessing, protecting and restoring freshwater ecosystems. The drivers of these heterogeneities can be identified by modeling their dynamics. This approach is useful for theoretical and applied limnology. In this study, a 3D hydrodynamic model of Lake Geneva (France/Switzerland) was created. It is based on the Delft3D suite software and includes the main tributary (Rhône River) and two-dimensional high-resolution meteorological forcing. It provides 3D maps of water temperature and current velocities with a 1 h time step on a 1 km horizontal grid size and with a vertical resolution of 1 m near the surface to 7 m at the bottom of the lake. The dynamics and the drivers of phytoplankton heterogeneities were assessed by combining the outputs of the model and chlorophyll-a concentration (Chl-a) data from MERIS satellite images between 2008 and 2012. Results highlight physical mechanisms responsible for the occurrence of seasonal hot-spots in phytoplankton abundance in the lake. At the beginning of spring, Chl-a heterogeneities are usually caused by an earlier onset of phytoplankton growth in the shallowest and more sheltered areas; spatial differences in the timing of phytoplankton growth can be explained by spatial variability in thermal stratification dynamics. In summer, transient and locally higher phytoplankton abundances are observed in relation to the impact of basin-scale upwelling.

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Importance of climate change-physical forcing on the increase of cyanobacterial blooms in a small, stratified lake

Abstract: The

Cited by 19 publications

References 63 publications

Effects of Climate Change on Lake Thermal Structure and Biotic Response in Northern Wilderness Lakes

Effects of Climate Change on Lake Thermal Structure and Biotic Response in Northern Wilderness Lakes

Impacts of changes in groundwater recharge on the isotopic composition and geochemistry of seasonally ice-covered lakes: insights for sustainable management

Using 3D modeling and remote sensing capabilities for a better understanding of spatio-temporal heterogeneities of phytoplankton abundance in large lakes

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