The influence of wind-induced mixing on the vertical distribution of buoyant and sinking phytoplankton species

Moreno-Ostos, Enrique; Cruz-Pizarro, L.; Basanta, Ana; George, D. G.

doi:10.1007/s10452-008-9167-x

Cited by 77 publications

(39 citation statements)

References 54 publications

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“…Whilst phytoplankton spatial distribution patterns can be influenced by many physical, chemical and biological factors (GEORGE, 1993), the mesoscale distribution of phytoplankton is often a product of complex interactions between the hydrodynamics of the lake and the buoyant/sinking properties of phytoplankton (REYNOLDS, 2006;MORENO-OSTOS et al, 2008a;MORENO-OSTOS et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon‐Shaped Reservoir

Moreno‐Ostos

Cruz-Pizarro

Basanta³

et al. 2009

International Review of Hydrobiology

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Moreno-Ostos, E., Cruz-Pizarro, L., Basanta, A., George, D. G. (2009). Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon-Shaped Reservoir. International Review of Hydrobiology, 94(3), 245-257.Phytoplankton communities in lakes and reservoirs are seldom homogeneously distributed but usually aggregate in patches and gradients. In this study we have combined the use of in vivo spectrofluorometry and acoustic Doppler current profiling to investigate the effect of water movements on the spatial distribution of cyanobacteria and diatoms in a thermally stratified reservoir in SW Spain. The distinctive canyon-shaped morphometry of the reservoir (El Gergal) favoured the development of a 'conveyor belt' pattern of circulation aligned with the long axis of the reservoir. Under non-regulated conditions, the spatial distribution of phytoplankton was almost entirely dependent on the interactions between advective transport and the buoyancy properties of the different functional groups of phytoplankton. The positively-buoyant cyanobacteria accumulated near the surface and were then transported downwind by the surface drift currents. In contrast, the negatively-buoyant diatoms sank in the water column and were transported upwind by the sub-surface return currents. When deep water was abstracted from the reservoir, these distribution patterns were modified. The results are discussed in relation to the problem of acquiring representative water samples from the reservoir and the application of a simple empirical model to optimize the location of the station used for routine cyanobacteria sampling on the reservoir.Peer reviewe

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Section: Introductionmentioning

confidence: 99%

Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon‐Shaped Reservoir

Moreno‐Ostos

Cruz-Pizarro

Basanta³

et al. 2009

International Review of Hydrobiology

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“…For instance, wind could alter the spatial distribution of planktonic populations [22][23][24] and tends to concentrate cyanobacteria on the leeward side of a lake [25,26], which would otherwise float and aggregate on the surface of calm water. Further, there is a critical wind speed, below which cyanobacteria colonies tend to float and aggregate on the surface; once the critical wind speed is exceeded, however, the cyanobacteria colonies are usually redistributed across the vertical water column [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…However, such an understanding has been incomplete in existing literature [28]. The main objective of this study was therefore to use long-term field data to analyze how wind affects the spatiotemporal distribution of eutrophication in Lake Tai, a typical large shallow lake located in east China.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Distribution of Eutrophication in Lake Tai as Affected by Wind

Zhang

Wang

et al. 2017

Water

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Abstract:One common hypothesis is that wind can affect concentrations of nutrients (i.e., nitrogen and phosphorus) and chlorophyll-a (Chl-a) in shallow lakes. However, the tests of this hypothesis have yet to be conclusive in existing literature. The objective of this study was to use long-term data to examine how wind direction and wind speed affect the spatiotemporal variations of total nitrogen (TN), total phosphorus (TP) and Chl-a in Lake Tai, a typical shallow lake located in east China. The results indicated that the concentrations of nutrients and Chl-a tended to decrease from the northwest to the southeast of Lake Tai, with the highest concentrations in the two leeward bays (namely Meiliang Bay and Zhushan Bay) in the northwestern part of the lake. In addition to possible artificial reasons (e.g., wastewater discharge), the prevalent southeastward winds in warm seasons (i.e., spring and summer) and northwestward winds in cool seasons (i.e., fall and winter) might be the major natural factor for such a northwest-southeast decreasing spatial pattern. For the lake as a whole, the concentrations of TN, TP and Chl-a were highest for a wind speed between 2.1 and 3.2 m·s −1 , which can be attributed to the idea that the wind-induced drifting and mixing effects might be dominant in the bays while the wind-induced drifting and resuspension effects could be more important in the other parts of the lake. Given that the water depth of the bays was relatively larger than that of the other parts, the drifting and mixing effects were likely dominant in the bays, as indicated by the negative relationships between the ratios of wind speed to lake depth, which can be a surrogate for the vertical distribution of wind-induced shear stress and the TN, TP and Chl-a concentration. Moreover, the decreasing temporal trend of wind speed in combination with the ongoing anthropogenic activities will likely increase the challenge for dealing with the eutrophication problem of Lake Tai.

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“…Slightly higher chl-a variability was recorded in the part between the deepest point of the lake and the outflow; the direction and the orientation of the vector was consistent with the wind direction (SW), during the measurement period. Wind may influence the phytoplankton distribution (expressed as chlorophyll) [37,38].…”

Section: Discussionmentioning

confidence: 99%

The Role of Confluence in Shaping Water Quality Parameters on Example of the Flow-Through Lake Bikcze (Eastern Poland)

Ferencz

Dawidek

2018

Water

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Abstract:The role of confluence (flowability) in shaping the concentration of dissolved oxygen (DO), chlorophyll-a (chl-a) and pH was determined using a model approach. The calculations considered both horizontal and vertical variability of parameters. There was a general tendency for the pH and oxygen to increase along the transect connecting the place of surface water inlet, deepest point of the lake basin and the place of water outlet, and the reverse tendency for chlorophyll. The average gradient for particulate radius was calculated as arithmetic mean value of six partial gradients (corresponding to individual depths, every 0.5 m). Values of average gradients indicated high dynamics of DO and pH concentration changes as well as low chlorophyll-a variability. A slight inclination of the final resultant vector gradients of DO and pH from the surface water inlet, deepest point of the lake basin and the place of water outlet transect indicated the dominant role of confluence in these parameters variability (values amounted to 6.08 mg·km −1 and 3.34 pH units·km −1 , respectively). The value of the chlorophyll-a gradient vector (1.86 µg·km −1 ) indicated a slight differentiation of the parameter in the basin, independent of the hydrological conditions. The concentration of chl-a in the polymictic Lake Bikcze resulted from the effect of the limnic conditions; the flowability of the lake was just one of many factors affecting the variability of the parameter.

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The influence of wind-induced mixing on the vertical distribution of buoyant and sinking phytoplankton species

Cited by 77 publications

References 54 publications

Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon‐Shaped Reservoir

Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon‐Shaped Reservoir

Spatiotemporal Distribution of Eutrophication in Lake Tai as Affected by Wind

The Role of Confluence in Shaping Water Quality Parameters on Example of the Flow-Through Lake Bikcze (Eastern Poland)

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