The influence of reduced light intensity on the response of benthic diatoms to herbicide exposure

Wood, Rhiannon J.; Mitrovic, Simon M.; Lim, Richard P.; Kefford, Ben J.

doi:10.1002/etc.3379

Cited by 10 publications

(4 citation statements)

References 36 publications

(58 reference statements)

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“…In their study, Wood et al (2016) examined the effects of changing light intensities (20 and 100 µmol m −2 s −1 ) on glyphosate (50, 200, and 500 µg l −1 ) toxicity to natural benthic communities collected from 4 different rivers in the Great Barrier Reef World Heritage Area (Australia). For the majority of the evaluated taxa (22 of the 26) and for the entire community, no significant interaction between light and herbicide effects at the community levels was found.…”

Section: Case Of Glyphosate and Lightmentioning

confidence: 99%

“…For the majority of the evaluated taxa (22 of the 26) and for the entire community, no significant interaction between light and herbicide effects at the community levels was found. It is important to note, however, that the response of diatoms to herbicide exposure at the community levels was dependent on prior exposure histories of the sites and can be influenced by intra-specific interactions between taxa (Wood et al, 2016).…”

Section: Case Of Glyphosate and Lightmentioning

confidence: 99%

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Temperature and Light Modulation of Herbicide Toxicity on Algal and Cyanobacterial Physiology

Gomes

Juneau

2017

Front. Environ. Sci.

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HIGHLIGHTS• We reviewed the interaction between light, temperature and herbicides on algal and cyanobacterial physiology.• Temperature is the main factor affecting herbicide toxicity to algae and cyanobacteria.• Changes in light environment may modulate the effects of photosynthesis-targeting herbicides.Important interactions between climatic parameters and herbicide toxicity have been discussed in the literature. As climate changes are expected to influence the growth conditions of aquatic photosynthetic organisms over the next century by modifying the physicochemical parameters of the environment (such as temperature and incident light characteristics), the following questions arise: How will variations in climatic conditions influence herbicide toxicity in algae and cyanobacteria? Are these coupled effects on aquatic photosynthetic organism physiology antagonistic, additive, or synergistic?We discuss here the physiological responses of algae and cyanobacteria to the combined effects of environmental changes (temperature and light) and herbicide exposure. Both temperature and light are proposed to influence herbicide toxicity through acclimation processes that are mainly related to cell size and photosynthesis. Algal and cyanobacterial responses to interactions between light, temperature, and herbicides are species-specific, making it difficult today to establish a single model of how climate changes will affect toxicity of herbicides. Acclimation processes could assure the maintenance of primary production but total biodiversity should decrease in communities exposed to herbicides under changing temperature and light conditions. The inclusion of considerations on the impacts of environmental changes on toxicity of herbicides in water quality guidelines directed toward protecting aquatic life is now urgently needed.Keywords: environment, toxicity, hazardous, pollutants, algae, cyanobacteria Gomes and JuneauHerbicides/Climate Changes on PhytoplanktonGraphical Abstract | Changes in temperature and light conditions in water systems over the next century will drive physiological responses of algal and cyanobacterial community to herbicides, by antagonistic, additive, or synergic effects with these pollutants.

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Section: Case Of Glyphosate and Lightmentioning

confidence: 99%

Section: Case Of Glyphosate and Lightmentioning

confidence: 99%

Temperature and Light Modulation of Herbicide Toxicity on Algal and Cyanobacterial Physiology

Gomes

Juneau

2017

Front. Environ. Sci.

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“…These environmentally realistic concentrations were selected to ensure there would be scope for stressors to act in concert without inducing a fully lethal effect. For glyphosate, 200 μg L − 1 has been shown to have a slightly negative effect on diatom cell health (Wood et al, 2016b), and for TiO 2 0.5 μg L − 1 was significantly lower than concentrations of 1.0-5.0 mg L − 1 which have been shown to have toxic effects on the marine diatom Thalassiosira pseudonana (Galletti et al, 2016). In the mesocosms, disturbance was caused by raking channels in the sediment surface to a depth of approximately 10-20 mm, across both the horizontal and vertical plane of the mesocosm surface (~30 channels raked in each plane).…”

Section: Stressor Applicationmentioning

confidence: 99%

The response of microphytobenthos to physical disturbance, herbicide, and titanium dioxide nanoparticle exposure

Rimmer

Hubas

Wyness

et al. 2022

Marine Pollution Bulletin

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“…Numerous studies have already been carried out evaluating the influence of light on the communities of periphytic algae. However, many were realized in lotic environments, or in experiments simulating these environments (Wood et al, 2016;Winkworth et al, 2015;Krupek et al, 2014). Thus, there is a shortage of studies for lentic environments.…”

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confidence: 99%

Periphytic algae biomass at different shading levels: an experimental approach

Santos

Rodrigues

2021

Acta Limnol. Bras.

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Aim Light is an essential component in the process of synthesis of organic compounds by photosynthetic organisms. Assuming that a higher level of luminosity would positively influence the production of biomass, we evaluated the influence of different levels of shading on the biomass of periphytic algae, through an experimental study. Methods Glass slides were used for this as an artificial substrate for the colonization and succession of algae in Garças Lake, on the upper Paraná River floodplain, and later transferred to nine aquaria. These were divided into three treatments: three without cover (AC), three with 50% shading screens (A50) and three with 80% shading screens (A80). Abiotic variables (pH, conductivity, turbidity, temperature and dissolved oxygen) and biomass were measured every five days for 15 days. The biomass was evaluated using the chlorophyll-a method. Concentrations of total phosphorus, phosphate, total nitrogen, nitrate and ammoniacal nitrogen were evaluated every five days. Results There was no significant variation of the biomass over time, however, there is a significant difference between the treatments. The highest biomass was found in the control treatment and the lowest was found in the treatment with 80% shading. The other limnological variables evaluated did not show significant changes over time. Conclusions The abiotic variables did not influence the biomass of the phycoperiphyton community, which was influenced only by luminosity. Thus, we conclude that light is a variable with direct influence on the production of periphytic biomass. At low intensity it is a variable that can limit the production of biomass. In high intensity however, it influences by increasing its production.

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The influence of reduced light intensity on the response of benthic diatoms to herbicide exposure

Cited by 10 publications

References 36 publications

Temperature and Light Modulation of Herbicide Toxicity on Algal and Cyanobacterial Physiology

Temperature and Light Modulation of Herbicide Toxicity on Algal and Cyanobacterial Physiology

The response of microphytobenthos to physical disturbance, herbicide, and titanium dioxide nanoparticle exposure

Periphytic algae biomass at different shading levels: an experimental approach

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