From behaviour to complex communities: Resilience to anthropogenic noise in a fish-induced trophic cascade

Rojas, Emilie; Gouret, Mélanie; Agostini, Simon; Fiorini, Sarah; Fonseca, Paulo J.; Lacroix, Gérard; Médoc, Vincent

doi:10.1101/2022.07.05.498792

Cited by 4 publications

(3 citation statements)

References 55 publications

(82 reference statements)

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“…: it allows them to find food, to escape to predators, and more generally to do their diel migration (Larsson & Kleiven, 1996; Dodson et al, 1997; O’Keefe et al, 1998; Roozen & Lürling, 2001; Chang & Hanazato, 2003). This prediction is consistent with a lower abundance of daphniids in a zooplankton community exposed to chronic boat noise (Rojas et al, 2022), despite the absence of observed effects by Prosnier et al (2022) with chronic boat noise, but asks how other zooplankton species are affected.…”

Section: Discussionsupporting

confidence: 77%

Chronic broadband noise increases the fitness of a freshwater zooplankton

Prosnier

Rojas

Valéro

et al. 2022

Preprint

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Although there is an increasing interest in the effects of anthropogenic noise on animals, aquatic studies mainly focus on organisms with hearing systems (marine mammals, fish, great arthropods) while many others of substantial ecological importance are not considered. Here we show that the water flea Daphnia magna, a widespread zooplankton species serving as food source for higher trophic levels, could be affected by noise pollution in a way that we did not expect. We found that isolated individuals exposed to a continuous broadband sound have a higher survival and fecundity, thus a higher fitness. We also found that they are slower than individuals not exposed to additional noise. It could be that the energy saved from reduced mobility is reallocated to fitness. In natural systems, this reduced velocity should result in a more negative outcome for Daphnia's fitness due to competition and predation. Our result highlights that, despite the absence of a known hearing system, a small crustacean can be affected by noise. Consequently, anthropogenic noise can not only affect communities through top-down cascading effects, when it changes the behaviour of top-predators like fish, but also via bottom-up effects with alterations in zooplankton.

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Section: Discussionsupporting

confidence: 77%

Chronic broadband noise increases the fitness of a freshwater zooplankton

Prosnier

Rojas

Valéro

et al. 2022

Preprint

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“…The first one is to continue to investigate how noise affects organisms: which noise (acute or chronic, continuous or not, various frequency …) affect which organism (hearing species, zooplankton) in which way (behaviour and fitness) through which mechanism (physiology, environmental perception, ability to prey) (Duarte et al, 2021). The second one is the impact on more complex system, as a food web, with various organisms that are not similarly impacted by a type of noise (see for instance Rojas et al, 2022). As for other pollutants, these studies seem mandatory to understand how anthropogenic noises could affect ecosystems.…”

Section: Discussionmentioning

confidence: 99%

No evidence for an effect of chronic boat noise on the fitness of reared water fleas

Prosnier

Rojas

Médoc

2022

Preprint

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Ecotoxicological studies mainly focus on chemical pollution, however, since past decades, there has been a growing interest for the acoustic pollution. Previous studies on underwater acoustic pollution showed that noise affects vertebrates' behaviour, like fish and marine mammals. However, little is known about other organisms. Consequently, we studied important lacking aspects, well known with chemical pollution: the effect on a key zooplankton species (used as bioindicator) and the effect on fitness (survival and fecundity). We exposed isolated water fleas, Daphnia magna, to chronic boat noise or to a silence broadcasted as control, from birth to death. We measured effects on lifespan and clonal offspring production (e.g., clutch size, number of produced offspring along life). We did not observe any effect of the chronic boat noise exposition on Daphnia's fitness. These results are consistent with results on previous acute noise exposure, but also opposite to other ones found with acute and chronic noise effect. Thus, we discuss how the noise structure and temporal pattern could affect its impacts on aquatic organisms. Our work highlights that noise pollution should be integrated in ecotoxicological studies, but also that some particular aspects of this pollutant should be considered differently than chemical pollutants.

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“…Despite these well-known effects, there is a signi cant gap in our understanding of how antropophony affects freshwater ecosystems (Gammell and O'Brien 2013). To date, there are fewer than a dozen articles that have focused on studying the effects of anthropophony on freshwater animals (for example Amoser and Ladich 2010; Desjonquères et al 2020; Rojas et al 2023). This lack of knowledge emerges prominently as freshwater ecosystems are among the most threatened by human activity (Dudgeon et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Unveiling nature’s beat: analyzing the acoustics of an aquatic bug in relation to urban sounds

Farfán-Beltrán,

Cano-Santana,

Córdoba-Aguilar

2023

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Anthropophony is a prominent component of the soundscapes worldwide and is known to affect biota. Although responses to antropophony in terrestrial and marine animals have been relatively well studied, there is still a lack of knowledge regarding freshwater biota. In fact, freshwater taxa are possibly among the most threatened groups and so unveiling the reasons of threat is key. We investigated the low-frequency sounds - usually associated with anthropophony - on the stridulation of Krizousacorixa femorata, a common water bug in Mexico City. Using aerial recordings, we estimated the Normalized Difference Soundscape Index (NDSI) to characterize soundscapes in six city sites throughout a year. Also, we obtained the peak frequency (Pf) through underwater recordings. By last, we evaluated the relationships between the soundscapes and the Pf through a mixed linear model. There was a negative relation between NDSI and Pf, so there are higher-pitched stridulations at sites with dominant anthropophony. We cannot discard other factors that contribute to stridulation variation. Nonetheless, we ignore how low-frequency sounds impact freshwater ecosystems, and the intricate relationship between soundscapes and aquatic life in urban settings. Implications for insect conservation: There is a correlation between anthropophony and variations in the stridulation of aquatic bugs. This highlights the possibility of sound pollution on freshwater systems, emphasizing the need for assessment to better understand and prevent potential harm to aquatic insects.

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From behaviour to complex communities: Resilience to anthropogenic noise in a fish-induced trophic cascade

Cited by 4 publications

References 55 publications

Chronic broadband noise increases the fitness of a freshwater zooplankton

Chronic broadband noise increases the fitness of a freshwater zooplankton

No evidence for an effect of chronic boat noise on the fitness of reared water fleas

Unveiling nature’s beat: analyzing the acoustics of an aquatic bug in relation to urban sounds

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