Spatio‐temporal heterogeneity in river sounds: Disentangling micro‐ and macro‐variation in a chain of waterholes

Karaconstantis, Chris; Desjonquères, Camille; Gifford, Toby; Linke, Simon

doi:10.1111/fwb.13439

Cited by 12 publications

(24 citation statements)

References 45 publications

(85 reference statements)

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“…The most significant limitation of this study is the 10-min survey period that is undoubtedly insufficient at capturing the temporal acoustic variation present in each study pond. Previous ecoacoustic research has reported diurnal variation in acoustic richness and activity across a variety of freshwater ecosystems (Decker et al, 2020;Gottesman et al, 2020;Karaconstantis et al, 2020;. For an Australian river soundscape, Karaconstantis et al (2020) showed that fishes were most acoustically active during the day and least active at dawn, whereas aquatic insects began stridulating at dusk and were most acoustically active between midnight and dawn.…”

Section: Caveats and Potential Future Application Of Ecoacousticsmentioning

confidence: 98%

“…Water beetles are also known to produce sounds underwater and many are useful biological indicators of environmental change (Sánchez-Fernández et al, 2006;Wilson et al, 2015). Recently, an ecoacoustic approach has been adopted by many authors to survey freshwater ecosystems (Desjonquères et al, 2015;Barclay, Gifford & Linke, 2020;Decker et al, 2020;Karaconstantis et al, 2020;Rountree, Juanes & Bolgan, 2020). However, an ecoacoustic survey approach has not yet been used to assess diversity and conservation success in ponds.…”

Section: Introductionmentioning

confidence: 99%

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Ecoacoustics as a novel tool for assessing pond restoration success: Results of a pilot study

Greenhalgh

Stone

fisher

et al. 2021

Aquatic Conservation

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1. Ecoacoustics is increasingly being used to monitor species populations and to estimate biodiversity in marine ecosystems, but the underwater soundscapes of freshwater environments remain largely unexplored in this respect. Few studies exist concerning the acoustic diversity of ponds, but because aquatic plants and many arthropods such as Coleoptera and Hemiptera are known to produce sound, there is potential to use ecoacoustic techniques to monitor changes in biodiversity and conservation value. This pilot study compares the underwater soundscapes of recently restoredopen-canopy ponds and unmanaged highly terrestrialized ponds situated in an arable agricultural landscape of North Norfolk, UK, in order to assess the benefits of farmland pond restoration.3. Daytime sound recordings were made for 10 min in each pond and analysed primarily for arthropod stridulations. In addition, six commonly used acoustic indices were calculated to assess the soundscape biodiversity between the unmanaged and the restored ponds. The stridulations of three diving beetle

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Section: Caveats and Potential Future Application Of Ecoacousticsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Ecoacoustics as a novel tool for assessing pond restoration success: Results of a pilot study

Greenhalgh

Stone

fisher

et al. 2021

Aquatic Conservation

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“…A handheld Zoom recorder (e.g., models, H2, H4n, and H6) in combination with the H2a Aquarian Audio hydrophone is a popular equipment choice among some researchers (Decker et al, 2020;Karaconstantis et al, 2020; (Rountree et al, 2018. Desjonquères et al (2015) used Wildlife Acoustics SongMeters with RESON TC 4033 to record in ponds, while Gottesman et al (2018) and Desjonquères et al (2018) used a SongMeter with a HTI-96 hydrophone for deployment in a swamp and secondary river channels, respectively.…”

Section: Recording Equipmentmentioning

confidence: 99%

“…The phenology of different taxa through the course of a year will affect the extant assemblage in a waterbody (Aiken, 1991), andHill et al (2016) showed that macroinvertebrate sampling across all seasons provides the best record of the community, with autumn samples the most diverse. Gottesman et al (2018) recommend that recordings should cover a range of seasonal and diurnal periods to capture the temporal dynamics that are part of the acoustic diversity of a given site (Decker et al, 2020;Karaconstantis et al, 2020;Kuehne et al, 2013). In addition, wide spatial coverage across numerous sites is also encouraged, as further research is needed to understand spatial heterogeneity and its effect on the variability of acoustic assessments .…”

Section: Survey Designmentioning

confidence: 99%

Pond Acoustic Sampling Scheme: A draft protocol for rapid acoustic data collection in small waterbodies

Abrahams

Desjonquères

Greenhalgh

2021

Ecology and Evolution

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Freshwater conservation is vital to the maintenance of global biodiversity. Ponds are a critical, yet often under‐recognized, part of this, contributing to overall ecosystem functioning and diversity. They provide habitats for a range of aquatic, terrestrial, and amphibious life, often including rare and declining species. Effective, rapid, and accessible survey methods are needed to enable evidence‐based conservation action, but freshwater taxa are often viewed as “difficult”—and few specialist surveyors are available. Datasets on ponds are therefore limited in their spatiotemporal coverage. With the advent of new recording technologies, acoustic survey methods are becoming increasingly available to researchers, citizen scientists, and conservation practitioners. They can be an effective and noninvasive approach for gathering data on target species, assemblages, and environmental variables. However, freshwater applications are lagging behind those in terrestrial and marine spheres, and as an emergent method, research studies have employed a multitude of different sampling protocols. We propose the Pond Acoustic Sampling Scheme (PASS), a simple protocol to allow a standardized minimal sample to be collected rapidly from small waterbodies, alongside environmental and methodological metadata. This sampling scheme can be incorporated into a variety of survey designs and is intended to allow access to a wide range of participants, without requiring complicated or prohibitively expensive equipment. Adoption of this sampling protocol would enable consistent sound recordings to be gathered by researchers and conservation organizations, and allow the development of landscape‐scale surveys, data sharing, and collaboration within an expanding freshwater ecoacoustic community—rather than individual approaches that produce incompatible datasets. The compilation of standardized data would improve the prospects for effective research into the soundscapes of small waterbodies and aid freshwater conservation efforts.

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“…Fewer studies discuss their temporal location and extent, despite climate patterns and other sources of temporal variability having the potential to alter population dynamics, changing seasonality or creating multi‐year cycles (Hewitt & Thrush, 2009; Hewitt et al, 2016; McGeoch & Gaston, 2002; Spurgeon et al, 2020). Abundances of species can exhibit temporal cycles encompassing a variety of scales (Feener & Schupp, 1998; Gray & Christie, 1983; Karaconstantis et al, 2020; Pacheco et al, 2012). Patterns may be driven by biological factors (e.g.…”

Section: Introductionmentioning

confidence: 99%

Sampling frequency, duration and the Southern Oscillation influence the ability of long‐term studies to detect sudden change

Hewitt

Bulmer

Stephenson

et al. 2021

Global Change Biology

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Ecologists have long acknowledged the importance of context dependency related to position along spatial gradients. It is also acknowledged that broad‐scale climate patterns can directly and indirectly alter population dynamics. What is not often addressed is whether climate patterns such as the Southern Oscillation interact with population‐level temporal patterns and affect the ability of time‐series data, such as long‐term state of the environment monitoring programmes, to detect change. Monitoring design criteria generally focus on number of data points, sampling frequency and duration, often derived from previous information on species seasonal and multi‐year temporal patterns. Our study questioned whether the timing of any changes relative to Southern Oscillation, interacting with species populations dynamics, would also be important. We imposed a series of simulated reductions on macrofaunal abundance data collected regularly over 29 years from two sites, using species selected for observed differences in temporal dynamics. We hypothesized that (1) high within‐year sampling frequency would increase detection ability for species with repeatable seasonality cycles and (2) timing of the reduction in abundance relative to the Southern Oscillation was only likely to affect detection ability for long‐lived species with multi‐year cyclic patterns in abundance. However, regardless of species population dynamics, we found both within‐year sampling frequency and the timing of the imposed reduction relative to the Southern Oscillation Index affected detection ability. The latter result, while apparently demonstrating a confounding influence on monitoring, offers the opportunity to improve our ability to detect and interpret analyses of monitoring data, and thus our ability to make recommendations to managers.

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Spatio‐temporal heterogeneity in river sounds: Disentangling micro‐ and macro‐variation in a chain of waterholes

Cited by 12 publications

References 45 publications

Ecoacoustics as a novel tool for assessing pond restoration success: Results of a pilot study

Ecoacoustics as a novel tool for assessing pond restoration success: Results of a pilot study

Pond Acoustic Sampling Scheme: A draft protocol for rapid acoustic data collection in small waterbodies

Sampling frequency, duration and the Southern Oscillation influence the ability of long‐term studies to detect sudden change

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