Sublethal exposure to agrochemicals impairs zooplankton ability to face future global change challenges

López-Valcárcel, María Eugenia; Arco, Ana del; Parra, Gema

doi:10.1016/j.scitotenv.2023.162020

Cited by 11 publications

(1 citation statement)

References 49 publications

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“…Temperature increase and pollution are two well-studied environmental change drivers known to interact [66][67][68][69]. The nature of their interaction is likely to depend on temperature-induced changes in metabolism, which can either enhance or mitigate pollution-related effects [69].…”

Section: Discussionmentioning

confidence: 99%

Intraspecific demographic and trait responses to environmental change drivers are linked in two species of ciliate

de Bruin,

De Laender,

Jadoul

et al. 2024

BMC Ecol Evo

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Background Over the past decade, theory and observations have suggested intraspecific variation, trait-based differences within species, as a buffer against biodiversity loss from multiple environmental changes. This buffering effect can only occur when different populations of the same species respond differently to environmental change. More specifically, variation of demographic responses fosters buffering of demography, while variation of trait responses fosters buffering of functioning. Understanding how both responses are related is important for predicting biodiversity loss and its consequences. In this study, we aimed to empirically assess whether population-level trait responses to multiple environmental change drivers are related to the demographic response to these drivers. To this end, we measured demographic and trait responses in microcosm experiments with two species of ciliated protists. For three clonal strains of each species, we measured responses to two environmental change drivers (climate change and pollution) and their combination. We also examined if relationships between demographic and trait responses existed across treatments and strains. Results We found different demographic responses across strains of the same species but hardly any interactive effects between the two environmental change drivers. Also, trait responses (summarized in a survival strategy index) varied among strains within a species, again with no driver interactions. Demographic and trait responses were related across all strains of both species tested in this study: Increasing intrinsic growth and self-limitation were associated with a shift in survival strategy from sit-and-wait towards flee. Conclusions Our results support the existence of a link between a population’s demographic and trait responses to environmental change drivers in two species of ciliate. Future work could dive deeper into the specifics of phenotypical trait values, and changes therein, related to specific life strategies in different species of ciliate and other zooplankton grazers.

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Section: Discussionmentioning

confidence: 99%

Intraspecific demographic and trait responses to environmental change drivers are linked in two species of ciliate

de Bruin,

De Laender,

Jadoul

et al. 2024

BMC Ecol Evo

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Roundup and immune challenge have different effects on a native field cricket and its introduced competitor

Mullins

Brown

Lovsey

et al. 2023

Environ Sci Pollut Res

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Crickets face many natural selection pressures, and humans have added to this burden by applying potentially harmful herbicides and unintentionally introducing competitors. We examine recently introduced Vela ctorus micado Japanese burrowing crickets which share a microhabitat and season with native Gryllus pennsylvanicus eld crickets. In this study, we assess the combined effects of Roundup (glyphosate-based herbicide) and a lipopolysaccharide (LPS) immune challenge on both crickets. In both species, an immune challenge reduced the numbers of eggs that female laid, however, this effect was much larger in G. pennsylvanicus. Conversely, Roundup caused both species to increase egg production, potentially representing a terminal investment strategy. The combined effect of immune challenge and herbicide harmed G. pennsylvanicus fecundity more than V. micado fecundity. Further, V. micado females laid signi cantly more eggs than G. pennsylvanicus, suggesting that introduced V. micado may have a competitive edge in fecundity over native G. pennsylvanicus. LPS and Roundup each had differing effects on male G. pennsylvanicus and V. micado calling effort. Overall, introduced male V. micado spent signi cantly more time calling than native G. pennsylvanicus, which could potentially interfere with G. pennsylvanicus mate-location behavior in their shared natural habitat. Despite the population-level spread of introduced V. micado, in our study, this species did not outperform native G. pennsylvanicus in tolerating immune and chemical challenge. Although V. micado appears to possess traits that make this introduced species successful in colonizing new habitats, it may be less successful in traits that would allow it to outcompete a native species.

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Sensitivity of Daphnia spinulata Birabén, 1917 to glyphosate at different salinity levels

Lares,

Vignatti,

Echaniz

et al. 2024

Environ Sci Pollut Res

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Daphnia spinulata Birabén, 1917 is an endemic cladoceran species, frequent in the zooplankton communities of the shallow lakes of the Pampean region of Argentina. These lakes have varying salinity levels and, being located in agricultural areas, are frequently subject to pesticide pollution. This study aimed to determine the effects of the herbicide glyphosate (Panzer Gold®) in combination with different salinity levels on the biological parameters of D. spinulata and its recovery ability after a short exposure. Three types of assays were performed: an acute toxicity test, a chronic assessment to determine survival, growth and reproduction, and recovery assays under optimal salinity conditions (1 g L − 1 ). The LC 50 -48h of glyphosate was 7.5 mg L − 1 (3. 15-11.72). Longevity and the number of offspring and clutches were signi cantly reduced by glyphosate and high salinity exposure, whether in isolation or combined. The timing of the rst offspring did not recover after glyphosate exposure. Our results reveal that D. spinulata is sensitive to the herbicide, which causes stronger negative effects in conditions of higher salinity. Further research is needed to shed further light on the sensitivity of this cladoceran to glyphosate and its variability under other interactive stress factors.

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Sublethal exposure to agrochemicals impairs zooplankton ability to face future global change challenges

Cited by 11 publications

References 49 publications

Intraspecific demographic and trait responses to environmental change drivers are linked in two species of ciliate

Intraspecific demographic and trait responses to environmental change drivers are linked in two species of ciliate

Roundup and immune challenge have different effects on a native field cricket and its introduced competitor

Sensitivity of Daphnia spinulata Birabén, 1917 to glyphosate at different salinity levels

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