Turbidity, Waterfowl Herbivory, and Propagule Banks Shape Submerged Aquatic Vegetation in Ponds

Onsem, Stijn Van; Triest, Ludwig

doi:10.3389/fpls.2018.01514

Cited by 16 publications

(8 citation statements)

References 101 publications

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“…The absorption of ions from the medium was balanced by the release of secondary metabolites by the organisms. These experiments confirm environmental observations indicating that macrophytes are improving the water quality in shallow eutrophic lakes by nutrient accumulation, and in macrophyte-dominant ponds, the conductivity is generally relatively low [ 46 , 47 ].…”

Section: Resultssupporting

confidence: 81%

Phytoremediation of CYN, MC-LR and ANTX-a from Water by the Submerged Macrophyte Lemna trisulca

Kucała

Saładyga

Kamiński

2021

Cells

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Cyanotoxins are harmful to aquatic and water-related organisms. In this study, Lemna trisulca was tested as a phytoremediation agent for three common cyanotoxins produced by bloom-forming cyanobacteria. Cocultivation of L. trisulca with Dolichospermum flos-aquae in BG11 medium caused a release of the intracellular pool of anatoxin-a into the medium and the adsorption of 92% of the toxin by the plant—after 14 days, the total amount of toxin decreased 3.17 times. Cocultivation with Raphidopsis raciborskii caused a 2.77-time reduction in the concentration of cylindrospermopsin (CYN) in comparison to the control (62% of the total pool of CYN was associated with the plant). The greatest toxin limitation was noted for cocultivation with Microcystis aeruginosa. After two weeks, the microcystin-LR (MC-LR) concentration decreased more than 310 times. The macrophyte also influenced the growth and development of cyanobacteria cells. Overall, 14 days of cocultivation reduced the biomass of D. flos-aquae, M. aeruginosa, and R. raciborskii by 8, 12, and 3 times, and chlorophyll a concentration in comparison to the control decreased by 17.5, 4.3, and 32.6 times, respectively. Additionally, the macrophyte stabilized the electrical conductivity (EC) and pH values of the water and affected the even uptake of cations and anions from the medium. The obtained results indicate the biotechnological potential of L. trisulca for limiting the development of harmful cyanobacterial blooms and their toxicity.

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Section: Resultssupporting

confidence: 81%

Phytoremediation of CYN, MC-LR and ANTX-a from Water by the Submerged Macrophyte Lemna trisulca

Kucała

Saładyga

Kamiński

2021

Cells

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“…Grazing pressure from fish and waterfowl is low in most natural lakes (Marklund et al, 2002 [ 87 ], Rip et al, 2006 [ 88 ]). Waterfowl can, however, have a major effect on density and species composition of submerged vegetation when present in high numbers (Søndergaard et al, 1996 [ 89 ], van Donk and Otte 1996 [ 90 ], Hilt et al, 2006 [ 80 ], van Onsem and Triest 2018 [ 91 ]). Especially high densities of herbivorous and benthivorous fish are harmful to submerged macrophytes (Hutorowicz and Dziedzic 2008 [ 92 ], Hussner et al, 2014 [ 79 ], Hilt et al, 2006 [ 80 ], Zinko 2017 [ 1 ]).…”

Section: (Re)establishment Of Submerged Vegetationmentioning

confidence: 99%

“…Densities of charophyte oospores can exceed several 10,000 m −2 of lake sediment, while the densities of the (far larger) angiosperm diaspores are several orders of magnitude lower (de Winton et al, 2000 [ 65 ], van den Berg et al, 2001 [ 28 ], Steinhardt and Selig 2007 [ 122 ], 2009 [ 123 ], Blindow et al, 2016 [ 46 ], Verhofstad et al, 2017 [ 43 ], Holzhausen et al, 2017 [ 36 ]). In germination experiments with freshwater sediments, charophytes developed higher germling densities (van Onsem and Triest 2018 [ 91 ]), while angiosperm germling densities were higher in experiments with brackish water sediments (Blindow et al, 2016 [ 46 ]).…”

Section: (Re)establishment Of Submerged Vegetationmentioning

confidence: 99%

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Re-Establishment Techniques and Transplantations of Charophytes to Support Threatened Species

Blindow

Carlsson

Weyer³

2021

Plants

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Re-establishment of submerged macrophytes and especially charophyte vegetation is a common aim in lake management. If revegetation does not happen spontaneously, transplantations may be a suitable option. Only rarely have transplantations been used as a tool to support threatened submerged macrophytes and, to a much lesser extent, charophytes. Such actions have to consider species-specific life strategies. K-strategists mainly inhabit permanent habitats, are perennial, have low fertility and poor dispersal ability, but are strong competitors and often form dense vegetation. R-strategists are annual species, inhabit shallow water and/or temporary habitats, and are richly fertile. They disperse easily but are weak competitors. While K-strategists easily can be planted as green biomass taken from another site, rare R-strategists often must be reproduced in cultures before they can be planted on-site. In Sweden, several charophyte species are extremely rare and fail to (re)establish, though apparently suitable habitats are available. Limited dispersal and/or lack of diaspore reservoirs are probable explanations. Transplantations are planned to secure the occurrences of these species in the country. This contribution reviews the knowledge on life forms, dispersal, establishment, and transplantations of submerged macrophytes with focus on charophytes and gives recommendations for the Swedish project.

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“…SAV abundance and community composition are driven by a range of environmental factors including herbivory from fish and waterfowl (Gyimesi et al., 2011; Søndergaard et al., 1996; Tatu et al., 2007), competition from non‐native species (Hershner & Havens, 2008), salinity (Norman & Southwick, 1991; Waterfield, 1951), turbidity (Carter & Rybicki, 1991; Van Onsem & Triest, 2018), and pH (Buapet et al., 2013; DesGranges & Darveau, 1985; Koweek et al., 2018; Roberts et al., 1985), among other variables (Chamberlain, 1948; Dennison et al., 1993; Weisner et al., 1997). Changes to aquatic conditions from direct and indirect human activity have subsequently caused the decrease of this important waterfowl resource in wintering grounds across the Atlantic Flyway (Moorman et al., 2017; Morton & Kane, 1994; Orth & Moore, 1983; Schwab, 1984; Settle et al., 1991; Sincock et al., 1965; U.S.…”

Section: Introductionmentioning

confidence: 99%

Effects of submerged aquatic vegetation and water quality on waterfowl abundance by foraging guild

Sibilia

Aguirre‐Gutiérrez

Mowbray³

et al. 2022

Ecol Sol and Evidence

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Back Bay, Virginia, has been documented as an important foraging area for waterfowl since at least the mid‐1800s. Expansive submerged plant beds historically supported diverse assemblages of non‐breeding waterfowl; however, coastal development and other anthropogenic influences have since led to fluctuations in submerged aquatic vegetation (SAV) and an associated decline in waterfowl abundance in the bay. To gain insight into the effects of environmental drivers on waterfowl foraging guilds, our study explores the effects of SAV frequency and water quality on the abundance of dabbling ducks, diving ducks and swans and geese in Back Bay. We use 8 years of SAV, water quality, and waterfowl monitoring data collected by state and federal agencies to model the effects of salinity, turbidity, pH and percent frequency of SAV on the relative abundance of waterfowl by foraging guild in Back Bay. The appropriateness of the data and reasonability of the preliminary results were then evaluated through semi‐structured interviews with 11 local informants representing state, federal and non‐governmental organizations. Quantitative results indicated that dabbling ducks are affected differently than other guilds by water quality and percent frequency of SAV. Thematic analysis of the interview data revealed a number of potential explanations for the model results, as well as highlighted areas of uncertainty in need of further research. In a test of face validity, participants demonstrated a significant degree of belief in turbidity, salinity and SAV as drivers of waterfowl abundance, but were not convinced by the potential effects of pH as demonstrated by the model. This mixed methods study provides insights that could potentially influence the management and conservation of non‐breeding waterfowl populations by challenging the assumption that particular environmental conditions serve all foraging groups equally.

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Turbidity, Waterfowl Herbivory, and Propagule Banks Shape Submerged Aquatic Vegetation in Ponds

Cited by 16 publications

References 101 publications

Phytoremediation of CYN, MC-LR and ANTX-a from Water by the Submerged Macrophyte Lemna trisulca

Phytoremediation of CYN, MC-LR and ANTX-a from Water by the Submerged Macrophyte Lemna trisulca

Re-Establishment Techniques and Transplantations of Charophytes to Support Threatened Species

Effects of submerged aquatic vegetation and water quality on waterfowl abundance by foraging guild

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