Many species are currently experiencing anthropogenically driven environmental changes. Among these changes, increasing noise levels are specifically a problem for species using acoustic signals (i.e., species relying on signals that use the same sensory modality as anthropogenic noise). Yet many species use other sensory modalities, such as visual and olfactory signals, to communicate. However, we have only little understanding of whether changes in the acoustic environment affect species that use sensory modalities other than acoustic signals. We studied the impact of anthropogenic noise on the common cuttlefish Sepia officinalis, which uses highly complex visual signals. We showed that cuttlefish adjusted their visual displays by changing their color more frequently during a playback of anthropogenic noise, compared with before and after the playback. Our results provide experimental evidence that anthropogenic noise has a marked effect on the behavior of species that are not reliant on acousti...

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Anthropogenic noise affects behavior across sensory modalities.

Sexy voices – no choices: male song in noise fails to attract females

In birds, anthropogenic noise has been linked to reduced breeding densities and success, but the mechanisms by which this occurs are currently unclear. In this study, we investigated whether wind turbine noise, an increasingly common source of anthropogenic noise in remote and rural locations, affects territory defense in a songbird, the European robin (Erithacus rubecula). We showed that robins increase low-frequency song elements in response to territorial intrusion under quiet conditions but that this response did not occur in the presence of wind turbine noise. These results are particularly interesting in light of previous work implicating low-frequency song in aggression, perhaps as a signal of body size. Thus, anthropogenic noise may affect their ability to deter an intruder, leading to expenditure of extra time and energy, to increased risks of injury and, as a consequence, reduced breeding success. Our study contributes to understanding the impact of anthropogenic noise on birds by linking disruptive noise and territorial behavior, which may be a mechanism underlying the reduction in bird breeding densities and success that has been reported in noisy areas.

Wind farm noise suppresses territorial defense behavior in a songbird

Noise pollution degrades natural acoustic conditions, potentially interfering with bird communication. However, exactly how noise impacts the ability of the signal receiver to detect and discriminate vocalizations from conspecifics remains understudied in field settings. We performed a natural experiment to determine the effect of noise pollution on the territory-defense behaviors of two emberizid sparrows exposed to carefully constructed playbacks of conspecific intruder songs. Although all birds reacted to the playbacks, response latency increased with noise levels. This suggests that noise interferes with signal reception and may indicate impaired signal discrimination. We place these results in the context of a receiver's “listening area” and the significant impact of noise pollution on this receiver-centric perceptual acoustic range. This work informs conservation efforts and provides a much needed field-based examination of the disruptive impact of noise pollution on behaviors directly related to reproduction and fitness.

https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.1259

Anthropogenic noise weakens territorial response to intruder's songs

Silvereyes decrease acoustic frequency but increase efficacy of alarm calls in urban noise

https://pureadmin.qub.ac.uk/ws/files/82776657/McMullen_et_al.pure_1_.pdf

Heather McMullen

Papers

Anthropogenic noise affects vocal interactions