Sampling Methods for Beetles (Coleoptera)

Iannuzzi, Luciana; Liberal, Carolina Nunes; Souza, Thamyrys Bezerra de; Pellegrini, Thaís Giovannini; Cunha, Janaina Camara Siqueira da; Koroiva, None Ricardo; Albuquerque, Larissa Simões Corrêa de; Costa, Fábio Correia; Salomão, Renato Portela; Maia, Artur Campos Dália; Leivas, Fernando W. T.

doi:10.1007/978-3-030-53226-0_6

Cited by 4 publications

(2 citation statements)

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“…Focal groups, notably charismatic taxa like Lepidoptera (i.e. diurnal butterflies, skippers and moths) [32,[41][42][43][44][45][46] and beetles (mostly dung beetles) [47][48][49][50][51][52][53], have been extensively studied, utilizing effective collection and observational survey methods that allow the establishment of standardized protocols replicable over time [54][55][56]. Substantial progress has also been achieved in freshwater monitoring programmes, with the immature stages of various aquatic orders playing a pivotal role [32,41,42,44,45,[57][58][59].…”

Section: (C) Ongoing Biomonitoring Programmes and Logistic Complexitiesmentioning

confidence: 99%

Systematic challenges and opportunities in insect monitoring: a Global South perspective

Sánchez Herrera,

Forero,

Calor

et al. 2024

Phil. Trans. R. Soc. B

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Insect monitoring is pivotal for assessing biodiversity and informing conservation strategies. This study delves into the complex realm of insect monitoring in the Global South—world developing and least-developed countries as identified by the United Nations Conference on Trade and Development—highlighting challenges and proposing strategic solutions. An analysis of publications from 1990 to 2024 reveals an imbalance in research contributions between the Global North and South, highlighting disparities in entomological research and the scarcity of taxonomic expertise in the Global South. We discuss the socio-economic factors that exacerbate the issues, including funding disparities, challenges in collaboration, infrastructure deficits, information technology obstacles and the impact of local currency devaluation. In addition, we emphasize the crucial role of environmental factors in shaping insect diversity, particularly in tropical regions facing multiple challenges including climate change, urbanization, pollution and various anthropogenic activities. We also stress the need for entomologists to advocate for ecosystem services provided by insects in addressing environmental issues. To enhance monitoring capacity, we propose strategies such as community engagement, outreach programmes and cultural activities to instill biodiversity appreciation. Further, language inclusivity and social media use are emphasized for effective communication. More collaborations with Global North counterparts, particularly in areas of molecular biology and remote sensing, are suggested for technological advancements. In conclusion, advocating for these strategies—global collaborations, a diverse entomological community and the integration of transverse disciplines—aims to address challenges and foster inclusive, sustainable insect monitoring in the Global South, contributing significantly to biodiversity conservation and overall ecosystem health. This article is part of the theme issue ‘Towards a toolkit for global insect biodiversity monitoring’.

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Section: (C) Ongoing Biomonitoring Programmes and Logistic Complexitiesmentioning

confidence: 99%

Systematic challenges and opportunities in insect monitoring: a Global South perspective

Sánchez Herrera,

Forero,

Calor

et al. 2024

Phil. Trans. R. Soc. B

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“…The presence of dung beetles also indicates that large mammals are present, providing the food source for dung beetles (Vulinec et al, 2006;Raine and Slade, 2019;Correa-Cuadros et al, 2022). There are, however, a wide range of sampling methodologies for dung beetles, from basic pitfall traps to more complex or complementary methods such as mini-Winkler extractor (Iannuzzi et al, 2021). These varied methodologies and sampling efforts make comparisons difficult among the many studies.…”

Section: Introductionmentioning

confidence: 99%

Toward a standardized methodology for sampling dung beetles (Coleoptera: Scarabaeinae) in the Neotropics: A critical review

Mora-Aguilar¹,

Arriaga-Jiménez

Correa

et al. 2023

Front. Ecol. Evol.

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IntroductionThe standardization of sampling protocols is imperative for robustly studying any taxonomic group. Replicable methods allow the comparison of data between different spatial and temporal studies. In the case of dung beetles, one of the best-studied indicator groups in analyses of environmental disturbance, a wide range of collection methodologies are used, from basic pitfall traps to more complex or complementary methods such as mini-Winkler extractor. Also, different types of attractive baits, sampling effort, durations, and designs are used in dung beetle studies. Variations in methodological approaches are particularly noted in the Neotropics, which may be related to the vast number of biological strategies and behavior of dung beetles that inhabit this region. A lack of methodological unification for the Neotropical region makes a cross-sectional analysis of the information impossible.MethodsWe performed a compilation and analytical review of the existing literature for dung beetle sampling in the Neotropics, discussing the most used methodologies, their advantages and disadvantages, and specific cases in which particular models are more efficient.ResultsPitfall traps baited with human excrement are the most common sampling method, but there is a wide range of models and variations in the structure of this trap. The complementary effect generated by flight interception traps, light traps, and direct collections, particularly within microhabitats, is exciting for the potential of finding new species. Some methodologies, such as mini-Winkler extractor, fogging, or very specific baits, are infrequently used.DiscussionThere was a lack of inclusion of spatial and temporal variation among studies. Therefore, it is necessary to consider broader sampling windows, which include different spatial scales, seasons, and years. Finally, we propose a standard protocol for sampling dung beetles in the Neotropics, depending on each objective, and including a basic methodology for obtaining complete local inventories.

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Good news! Sampling intensity needed for accurate assessments of dung beetle diversity may be lower in the Neotropics

Rivera

Favila

2022

Front. Ecol. Evol.

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Ecological studies with Scarabaeinae dung beetles have increased exponentially over the past 30 years, using lethal pitfall traps baited with mammal feces or carrion as the preferred sampling method. Different studies have determined the distance between pitfall traps for effective sampling, but the number of traps is often subjective, leading to excessive or poor sampling. This study provides quantitative guidelines for establishing the sample size for optimal completeness of dung beetle diversity by systematically reviewing the relationship between sampling intensity and sampling coverage, habitat type, and the journal impact factor in peer-reviewed research. We gathered 94 studies covering a range from México to Argentina. Sampling was conducted mainly in forested habitats, followed by treeless agriculture and agroforestry systems, with a median value of 50 pitfall traps per sampled habitat. Sampling completeness was above 0.9 in 95% of the studies. Oversampling ranged from 1 to more than 96,000 individuals, and sampling deficit varied between 2 and 3,300 specimens. Sampling intensity and the journal impact factor were significantly and positively correlated with oversampling, but these variables did not explain the sampling deficit. The positive correlation between journal impact factor and oversampling may reflect a publication bias where high-impact journals and researchers seek more generalizable information obtained with a higher sampling intensity. Dung beetle oversampling was not homogeneous between habitats, being highest in old-growth forests and lowest in disturbed habitats such as pastures and forest edges. Our results show that the collection intensity used in dung beetle studies should be reconsidered carefully. By incorporating ethical principles used in animal science, we suggest sampling guidelines for a robust sampling scheme of dung beetle diversity, which would also prevent oversampling. Consciously reducing sampling intensity will make resource use more cost-effective. We suggest increasing the number of independent sampling units rather than intensifying subsampling, thereby increasing the predictive power of statistical models to obtain more robust evidence of the phenomena under study.

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Sampling Methods for Beetles (Coleoptera)

Cited by 4 publications

References 235 publications

Systematic challenges and opportunities in insect monitoring: a Global South perspective

Systematic challenges and opportunities in insect monitoring: a Global South perspective

Toward a standardized methodology for sampling dung beetles (Coleoptera: Scarabaeinae) in the Neotropics: A critical review

Good news! Sampling intensity needed for accurate assessments of dung beetle diversity may be lower in the Neotropics

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