Which Traits Influence Bird Survival in the City? A Review

Land, Journal Year: 2021, Volume and Issue: 10(2), P. 92 - 92

Published: Jan. 20, 2021

Urbanization poses a major threat to biodiversity worldwide. We focused on birds as well-studied taxon of interest, in order review literature traits that influence responses urbanization. 226 papers were published between 1979 and 2020, aggregate information five groups have been widely studied: ecological traits, life history, physiology, behavior genetic traits. Some robust findings trait changes individual species well bird communities emerge. A lack specific food shelter resources has led the urban community being dominated by generalist species, while specialist show decline. Urbanized differ behavioral showing an increase song frequency amplitude, bolder behavior, compared rural populations same species. Differential predatory pressure results history including prolonged breeding duration, increases clutch brood size compensate for lower survival. Other species-specific include hormonal state, body differences from populations. identify gaps research, with paucity studies tropical cities need greater examination persistence success native vs. introduced

Language: Английский

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Measurement artefacts lead to false positives in the study of birdsong in noise

Methods in Ecology and Evolution, Journal Year: 2017, Volume and Issue: 8(11), P. 1617 - 1625

Published: March 10, 2017

Summary Numerous studies over the past decade have reported correlations between elevated levels of anthropogenic noise and a rise in minimum frequency acoustic signals animals living noisy habitats. This pattern appears to be occurring globally, higher pitched been hypothesized adaptive changes that reduce masking by low‐frequency traffic noise. However, sound analysis methods most often used these are prone measurement errors can result false positives. In addition, commonly method measuring frequencies visually from spectrograms might also lead observer‐expectancy biases could exacerbate errors. We conducted an experiment (i) quantify size type ‘eye‐balling’ measurements with cursors placed manually on recorded no‐noise conditions, (ii) test whether observer expectations significant measurements. asked 54 volunteers, blind true intention our study, measure variety natural synthesized bird sounds, either noise, or conditions. Test subjects were informed uninformed about results Our demonstrate inappropriate methodology yield positives effect sizes as large, even larger, than those published studies. addition artefacts, psychological led – when observers expected they measured significantly observers, who had not primed any expectation. The use improper bioacoustics publication spurious results. discuss alternative unbiased measures we caution it is imperative for researchers familiarize themselves both functions limitations their programmes. potential source error only field bioacoustics, but situation where influenced human subjectivity.

Language: Английский

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Urban sparrows respond to a sexually selected trait with increased aggression in noise

Scientific Reports, Journal Year: 2018, Volume and Issue: 8(1)

Published: May 8, 2018

Animals modify acoustic communication signals in response to noise pollution, but consequences of these modifications are unknown. Vocalizations that transmit best may not be those signal male quality, leading potential conflict between selection pressures. For example, slow paced, narrow bandwidth songs better less effective mate choice and competition than fast wide songs. We test the hypothesis affects song pace context using white-crowned sparrows (Zonotrichia leucophrys). measure variation along a gradient ambient levels San Francisco, CA. find males discriminate paced These findings biologically relevant because noisy areas tend have bandwidths. Therefore, this phenotype potentially increases transmission distance noise, elicits weaker responses from competitors. Further, we respond more strongly stimuli noisier conditions, supporting 'urban anger' hypothesis. suggest responsiveness song, possibly territorial urban areas.

Language: Английский

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Anthropogenic noise and habitat structure shaping dominant frequency of bird sounds along urban gradients

iScience, Journal Year: 2024, Volume and Issue: 27(2), P. 109056 - 109056

Published: Jan. 30, 2024

The shifts of bird song frequencies in urbanized areas provide a unique system to understand avian acoustic responses urbanization. Using passive monitoring and automatic sound recognition technology, we explored the frequency variations six common urban species their associations with habitat structures. Our results demonstrated that were significantly higher than those peri-urban rural areas. Anthropogenic noise structure identified as crucial factors shaping space for birds. We found noise, urbanization, open understory spaces are contributing increase dominant sounds. However, variables such vegetation density tree height can potentially slow down this upward trend. These findings offer essential insights into behavioral response birds variety forest habitats, implications ecosystem management restoration.

Language: Английский

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Influence of Anthropogenic Sounds on Insect, Anuran and Bird Acoustic Signals: A Meta-Analysis

Frontiers in Ecology and Evolution, Journal Year: 2022, Volume and Issue: 10

Published: Feb. 28, 2022

Acoustic communication is a way of information exchange between individuals, and it used by several animal species. Therefore, the detection, recognition correct understanding acoustic signals are key factors in effective communication. The priority effectiveness rather than perfection, being avoids affecting sound-based system One that can affect overlap time frequency during signal transmission, known as masking. type sound cause masking anthropogenic noise, which currently increasing due to urban growth consequently motorized transportation machinery. When exposed animals use compensatory mechanisms deal with masking, such modification parameters their signal. Here, we performed meta-analysis investigating whether different taxa have general tendency for changes available literature met minimum criteria perform meta-analysis. We hypothesized noise compensation mechanisms, dominant, maximum or frequencies, call duration, note duration rate meta-analysis, synthesized from 73 studies comprising 82 species three taxa: insects, anurans birds. Our results showed presence insects did not change parameters, while increased amplitude birds dominant frequency, songs. responses groups may be related particularities production reception differences considered also lack some taxa.

Language: Английский

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The adaptation and fitness costs to urban noise in the calls of the tree sparrow (Passer montanus)

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 13, 2025

Acoustic communication is one of the primary ways birds transmit and acquire important information. Birds living in urban environments are limited transmission recognition vocalizations due to intense low-frequency anthropogenic noise, but Adaptation Hypothesis (AAH) suggests that mitigate masking effects noise by modifying structure properties their vocalizations. Although these adaptations can increase efficiency communication, they also impose potential fitness costs on sender receiver, which negatively impact survival. The contact alarm calls tree sparrows have a frequency range 1–10 kHz, makes them likely be partially masked limiting between individuals interactions within populations. Thus, based AAH, we examined modifications response confirmed sparrows. We recorded two an call at 80 sites with varying levels Gwangju, Naju, Damyang from March April 2023. Both types tended higher peak frequencies shorter durations as increased. Alarm number notes duration increasing noise. These results indicate respond noisy through spectral temporal characteristics However, both receiver.

Language: Английский

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Avian acoustic communication: Understanding of peripheral and central neural systems with ecological adaptations

Avian Research, Journal Year: 2025, Volume and Issue: unknown, P. 100248 - 100248

Published: April 1, 2025

Language: Английский

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The acoustic adaptation hypothesis across terrestrial vertebrates: a meta-analysis

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 21, 2024

Acoustic communication plays a prominent role in various ecological and evolutionary processes involving social interactions. The properties of acoustic signals are thought to be influenced not only by the interaction between signaller receiver but also characteristics environment through which signal is transmitted. This conjecture forms core so-called "acoustic adaptation hypothesis" (AAH), posits that vegetation structure affects frequency temporal parameters emitted as function their degradation properties. Specifically, animals densely vegetated 'closed habitats' expected produce longer with lower repetition rates frequencies (minimum, mean, maximum, peak) compared ones inhabiting less 'open habitats'. To date, this hypothesis has received mixed results, level support depending on taxonomic group methodology used. We conducted systematic literature search empirical studies testing for an effect signalling assessed generality AAH using meta-analytic approach based 371 sizes from 75 57 taxa encompassing birds, mammals amphibians. Overall, our results do provide consistent AAH, neither within-species comparisons (suggesting no overall phenotypically plastic response structure) nor among-species response). However, when considering birds only, we found weak comparisons, was mainly driven measured bandwidth, suggesting variable may exhibit structure. For significant after excluding comparative did account phylogenetic non-independence. Collectively, synthesis does universal evolution communication. highlight need more work currently under-studied such amphibians, mammals, insects. Furthermore, propose framework future research AAH. specifically advocate detailed quantitative characterization habitats identify highest detection probability determine if greater distances preferentially Finally, stress tests should focus selected increased transmission distance.

Language: Английский

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Natural and anthropogenic sounds reduce song performance: insights from two emberizid species

Behavioral Ecology, Journal Year: 2017, Volume and Issue: 28(4), P. 974 - 982

Published: Feb. 27, 2017

Anthropogenic sounds influence animal vocal behaviour, species distributions, and community assemblages. Natural also have the potential to affect behaviour ecology of animals, but it is currently unknown if effects natural match those anthropogenic sounds. Here, we quantified compared on avian song performance by calculating trade-off frontiers based trill rate bandwidth 2 emberizid species. Chipping sparrows (Spizella passerina) white-crowned (Zonotrichia luecophrys) were recorded in areas with without sound along a gradient generated from ocean surf, respectively. We analysed individuals' relative frontier found that both vocalizing environments louder background sang songs significantly further below than sung birds quiet settings. noisy almost twice as far individuals areas, sparrow declined ~25% each 3 dB(A) increase environmental sounds, or halving size signaller's listening area. These results suggest can significant effect performance, trait known outcome male-male contests female mate choices. Considering are pervasive, acoustic refuges may be more important previously thought, development infringing larger portions prime habitat realize.

Language: Английский

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Effects of highways on bird distribution and soundscape diversity around Aldo Leopold’s shack in Baraboo, Wisconsin, USA

Landscape and Urban Planning, Journal Year: 2019, Volume and Issue: 192, P. 103666 - 103666

Published: Sept. 20, 2019

Language: Английский

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