Soundscapes of the Yungas Andean forest: Identifying the acoustic footprint of an anuran assemblage

Boullhesen, Martín; Vaira, Marcos; Bárquez, Rubén M.; Akmentins, Mauricio Sebastián

doi:10.1016/j.rsase.2022.100903

Cited by 2 publications

(2 citation statements)

References 34 publications

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“…In individuals are used as if they are independent during acoustic monitoring surveys (e.g. Boullhesen et al, 2023).…”

Section: Independence and Hidden Marginal Totalsmentioning

confidence: 99%

Phenological patterns in ecology: Problems using circular statistics and solutions based on simulations

Willig,

Rojas‐Sandoval,

Presley

2024

Methods Ecol Evol

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Quantification of phenological patterns (e.g. migration, hibernation or reproduction) should involve statistical assessments of non‐uniform temporal patterns. Circular statistics (e.g. Rayleigh test or Hermans‐Rasson test) provide useful approaches for doing so based on the number of individuals that exhibit particular activities during a number of time intervals. This study used monthly reproductive activity as an example to illustrate problems in applying circular statistics to data when marginal totals characterize experimental designs (e.g. the number of reproductively active individuals per time interval depends on sampling effort or sampling success). We illustrate the nature of this problem by crafting four exemplar data sets and developing a bootstrapping simulation procedure to overcome complications that arise from the existence of marginal totals. In addition, we apply circular statistics and our bootstrapping simulation to empirical data on the reproductive phenology of six species of Neotropical bats from the Amazon. Because sampling effort or success can differ among time intervals, circular statistics can produce misleading results of two types: those suggesting uniform phenologies when empirical patterns are markedly modal, and those suggesting non‐uniform phenologies when empirical patterns are uniform. The bootstrapping simulation overcomes these limitations: the exemplar phenology in which the percentage of reproductively active individuals is modal is appropriately identified as non‐uniform based on the bootstrapping approach, and the exemplar phenology in which the percentage of reproductively active individuals is invariant is appropriately identified as uniform based on the bootstrapping approach. The reproductive phenology of each of the six empirical examples is non‐uniform based on the bootstrapping approach, and this is true for bats species with unimodal peaks or bimodal peaks. In addition to problems with marginal totals, a review of analyses of phenological patterns in ecology identified two other frequent issues in the application of circular statistics: sampling bias and pseudoreplication. Each of these issues and potential solutions are also discussed. By providing source code for the execution of the Rayleigh test and Hermans‐Rasson test, along with the code for the bootstrapping simulation, we offer a useful tool for assessing non‐random phenologies when marginal totals characterize experimental designs.

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“…In individuals are used as if they are independent during acoustic monitoring surveys (e.g. Boullhesen et al, 2023).…”

Section: Independence and Hidden Marginal Totalsmentioning

confidence: 99%

Phenological patterns in ecology: Problems using circular statistics and solutions based on simulations

Willig,

Rojas‐Sandoval,

Presley

2024

Methods Ecol Evol

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“…Para medir la actividad de vocalización se instaló a 1,5 m del suelo un grabador digital automatizado (SongMeter SM4 -wildlifeacoustics.com), programado para grabar los primeros tres minutos de cada hora (72 min/día), en una frecuencia de muestreo de 16 KHz y 16 bit de resolución. Esta metodología se utilizó para el relevamiento de la riqueza de especies de anfibios anuros y determinar su huella digital sonora en los paisajes sonoros de Yungas (Boullhesen et al, 2021;2023). Este set de datos resulta igualmente útil para estudiar el comportamiento vocal del ensamble de aves presentes en esta localidad, ya que se sugiere que registros bioacústicos de entre 2 a 10 minutos de duración son adecuados para este fin (Lee y Mardsen, 2008).…”

Section: Materiales Y Métodosunclassified

Actividad de vocalización del Burgo (Momotus momota) en la Selva pedemontana de Yungas del Parque Nacional Calilegua

Schaaf

Akmentins

Boullhesen

2023

AZL

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La vocalización de las aves depende de cuestiones comportamentales de cada especiey también puede ser modulada por las condiciones climáticas. En este trabajo explo-ramos los patrones diarios y estacionales de la actividad vocal del Burgo (Momotusmomota) en el Parque Nacional Calilegua, noroeste de Argentina. Con un grabadordigital automatizado se registraron las vocalizaciones de esta especie durante unciclo anual completo: desde septiembre de 2017 hasta agosto de 2018. En total se registraron 50 eventos de vocalización, siendo diciembre el mes de mayor actividad vocal. Estuvieron concentrados durante el amanecer y mayormente en días sin precipitaciones. Las vocalizaciones realizadas antes del amanecer estuvieron influenciadas por la iluminación lunar. Nuestros resultados ayudan a comprender los patrones diarios y estacionales de vocalización para esta especie, demostrando que la actividad vocal estaría relacionada con la comunicación entre individuos durante las primeras horas del día.

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Soundscapes of the Yungas Andean forest: Identifying the acoustic footprint of an anuran assemblage

Cited by 2 publications

References 34 publications

Phenological patterns in ecology: Problems using circular statistics and solutions based on simulations

Phenological patterns in ecology: Problems using circular statistics and solutions based on simulations

Actividad de vocalización del Burgo (Momotus momota) en la Selva pedemontana de Yungas del Parque Nacional Calilegua

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