The interaction between cyanobacteria and zooplankton in a more eutrophic world

Ger, Kemal Ali; Urrutia‐Cordero, Pablo; Frost, Paul C.; Hansson, Lars‐Anders; Sarnelle, Orlando; Wilson, Alan E.; Lürling, Miquel

doi:10.1016/j.hal.2015.12.005

Cited by 262 publications

(205 citation statements)

References 244 publications

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“…Recent studies have also demonstrated that synergies between climate warming and increasing levels of humic substances in runoff are able to trigger an increase in cyanobacteria biomass [6], as well as a reduction in the biodiversity of phytoplankton [7,8]. Accordingly, both global and local scale adaptive management tools are important to manage future challenges related to water security and adequate functioning of freshwater ecosystems [7].…”

Section: Introductionmentioning

confidence: 99%

Nutrient Control to Prevent the Occurrence of Cyanobacterial Blooms in a Eutrophic Lake in Southern Sweden, Used for Drinking Water Supply

Hansson

Persson

2018

Water

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Control of nutrients, mainly nitrogen (N) and phosphorus (P), plays a significant role in preventing cyanobacterial blooms (harmful algal blooms (HABs)). This study aims at evaluating changes in the risk of the occurrence of cyanobacterial blooms and advancing the understanding of how nitrogen and phosphorus affect the growth of cyanobacteria in a eutrophic lake, Lake Vombsjön, in southern Sweden. Our results show that TP (total phosphorus) has stronger positive correlation with cyanobacteria biomass than DIP (dissolved inorganic phosphorus); DIN (dissolved inorganic nitrogen) has a stronger negative correlation with cyanobacteria biomass than TN (total nitrogen); and DIN:TP has a stronger negative correlation with cyanobacteria biomass than TN:TP. The highest amount of cyanobacteria biomass, above WHO (World Health Organization) Alert Level 2 (10 mm 3 /L) for drinking water correspond to the DIP/TP ratio below 10. To diminish the growth of cyanobacteria in Lake Vombsjön, TP and DIN control should be in focus, preferably a TP below 20 µg/L, and the DIN:TP ratio should be maintained at a level of at least above 10, but preferably above 50, thereby reducing the likelihood for a nitrogen limiting situation which may favor cyanobacteria dominating blooms.

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Section: Introductionmentioning

confidence: 99%

Nutrient Control to Prevent the Occurrence of Cyanobacterial Blooms in a Eutrophic Lake in Southern Sweden, Used for Drinking Water Supply

Hansson

Persson

2018

Water

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“…5). Compared with large-bodied cladocerans such as Daphnia of which grazing pressure is an important factor controlling algal biomass, small-bodied rotifers mainly consume the components of microbial loop and their high biomass often co-exist with algal blooms (Ger et al, 2016). Therefore, the decrease of small-bodied zooplankton with Cyanophyceae in nature-like fishway channel can be positive water treatment process removing the sources of suspended organic matter from surface river waters.…”

Section: Resultsmentioning

confidence: 99%

Changes in particulate organic matters and plankton populations in nature-like fishways: role of nature-like fish ways in water treatment

Hwang

Seo

Yoon

et al. 2017

Knowl. Manag. Aquat. Ecosyst.

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-Nature-like fishways, designed to mimic a small natural stream, have been widely used in river restoration projects as well as in rivers with dams and weirs. Because they are built with diverse natural materials similar to those in natural streams, we aimed to estimate the self-purification ability of nature-like fishways. Monthly sampling was conducted at inlet and outlet points of two nature-like fishways in Korea: the Baekjae and Sejong fishways. Two artificial fishways and main river channels were also evaluated to be used as references. Suspended solids (SS), chlorophyll a (Chl. a), and plankton abundances were measured. A significant reduction in plankton abundances and decrease in SS and Chl. a were observed in nature-like fishways, and no significant changes were observed in concrete artificial fishways and main river channels. In Baekjae and Sejong fishways, average 28.2% and 14.9% of the SS concentrations were reduced, respectively. The Chl. a concentration also significantly decreased (44.8% and 29.8% in Baekjae and Sejong fishways, respectively). A decreasing pattern was more apparent in the Baekjae fishway, which is longer and has a slower water velocity. The rate of decrease was higher when SS and Chl. a concentrations were high at the inlet points. Thus, we confirmed that particulate organic matters could be reduced in nature-like fishways. However, the direct cause and purification process mechanisms in them could not be clearly identified. Further studies should examine the biological and chemical mechanisms in fishways, allowing us to estimate their capacity for self-purification.Keywords: self-purification / phytoplankton / zooplankton / suspended solid / chlorophyll a Résumé -Changements dans les matières organiques particulaires et les populations de plancton dans les passes de type « rivière artificielle » : rôle des passes de type « rivière artificielle » dans la qualité de l'eau. Des passes de type « rivière artificielle », conçues pour imiter un petit ruisseau naturel, ont été largement utilisées dans les projets de restauration des rivières ainsi que dans les rivières avec barrages et seuils. Parce qu'elles sont construites avec divers matériaux naturels semblables à ceux des cours d'eau naturels, nous avons cherché à estimer l'aptitude à l'auto-épuration des passes de type « rivière artificielle ». Des échantillonnages mensuels ont été effectués aux points d'entrée et de sortie de deux passes de type « rivière artificielle » en Corée : les passes à poissons Baekjae et Sejong. Les deux passes artificielles et les secteurs principaux de rivières ont également été évalués pour servir de référence. On a mesuré les solides en suspension (SS), la chlorophylle a (Chl. a) et les abondances du plancton. Une réduction significative de l'abondance du plancton et une diminution des SS et de Chl. a ont été observées dans les passes de type « rivière artificielle » et aucun changement significatif n'a été observé dans les passes artificielles et les secteurs principaux de la rivière. Dans ...

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“…Given that there was still quite some chlorophyll-a present, the suppressive effect of cladocerans on rotifers is probably via direct mechanical interference rather than exploitative competition [52]. Cladocera subsequently declined strongly, particularly in controls and solely LMB-treated enclosures, which was paralleled by a strong increase in cyanobacterial chlorophyll-a, demonstrating the well-reported negative effect of cyanobacteria on Cladocera [24,51]. Since Cladocera and other groups increased again in abundance towards the end of the experiment, while oxygen conditions had not clearly changed, the negative effects of low oxygen do not seem to be the most probable cause of their decline in controls and solely LMB-treated enclosures.…”

Section: Discussionmentioning

confidence: 82%

“…A relatively low phosphate reduction of 35-40% has also been observed when lake water with an algal bloom was treated with LMB, where the authors pointed out that humic substance could have played a role [14]. Interference of humic substance with the phosphate-binding capacity of LMB has been confirmed experimentally [24,25,69]. The interference is kinetic; a humic substance forms a complex with La and hinders the contact between phosphate and La, thereby reducing the binding kinetics [25,26,69].…”

Section: Discussionmentioning

confidence: 89%

Effects of Dredging and Lanthanum-Modified Clay on Water Quality Variables in an Enclosure Study in a Hypertrophic Pond

Waajen

Engels²,

Oosterhout

2017

Water

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An enclosure experiment was conducted between July and September 2009 to compare the effectiveness of a phosphate fixative, the lanthanum-modified bentonite clay Phoslock ® (LMB), dredging, and their combination in controlling eutrophication in a hypertrophic urban pond in Heesch, The Netherlands. In total, 25 water quality variables were monitored. Multivariate analysis revealed that the combination LMB-treated and dredged enclosures deviated most from the pond (reference) and the controls, and showed the strongest eutrophication reduction. Overall, dredging significantly increased transparency, lowered turbidity, and improved the oxygen conditions in the enclosures compared to non-dredged ones. Nonetheless, one dredged enclosure deviated dramatically from the others, which might reflect methodological issues with dredging. The LMB treatment appeared to be less effective at mitigating eutrophication than dredging, and phosphate concentrations even increased during the experiment in the LMB-treated enclosures. Chemical equilibrium modeling suggested that humic substances could have formed complexes with lanthanum (La) from the LMB, rendering it unavailable for intercepting P over the course of the enclosure experiment. Residual lanthanum concentrations in combination dredging and LMB treatments exceeded the Dutch standard 10-fold. Total zooplankton abundance, and particularly Cladocera, increased in all enclosures over the course of the experiment. The limited effect of LMB in the enclosure experiment and the violation of the Dutch La standard when combined with dredging disqualify LMB as an intervention agent in the restoration of the pond.

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The interaction between cyanobacteria and zooplankton in a more eutrophic world

Cited by 262 publications

References 244 publications

Nutrient Control to Prevent the Occurrence of Cyanobacterial Blooms in a Eutrophic Lake in Southern Sweden, Used for Drinking Water Supply

Nutrient Control to Prevent the Occurrence of Cyanobacterial Blooms in a Eutrophic Lake in Southern Sweden, Used for Drinking Water Supply

Changes in particulate organic matters and plankton populations in nature-like fishways: role of nature-like fish ways in water treatment

Effects of Dredging and Lanthanum-Modified Clay on Water Quality Variables in an Enclosure Study in a Hypertrophic Pond

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