Exploring the predictive performance of several temperature measurements on Neotropical dung beetle assemblages: Methodological implications

Lobo, Jorge M.; Silva, Pedro Giovâni da; Hensen, Maristela Carpintero; Amore, Valentina; Hernández, Malva Isabel Medina

doi:10.1111/ens.12340

Cited by 7 publications

(10 citation statements)

References 24 publications

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“…In terms of climate change, many species within these three Coleoptera families are adapted to relatively narrow ranges of temperature, humidity and rainfall (Andresen, 2005; Lobo et al, 2018; Rodríguez et al, 2019; Zajicek et al, 2021), tropical Andean ecosystems (e.g., páramos) may be especially vulnerable to climate change (Herzog et al, 2011; Mason, 2001). This highlights the need to evaluate how climate change, especially drought, rising temperatures, and reduced cloud cover, could affect the diversity and functions of beetles (Arenas‐Clavijo & Armbrecht, 2018; Gobbi et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Knowledge of ground‐dwelling beetle communities in the tropical Andes: Gaps and trends

López‐Bedoya,

Magura,

Méndez‐Rojas

et al. 2023

Austral Ecology

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The tropical Andes is one of the most biodiverse ecoregions on Earth, exhibiting high levels of species endemism. The tropical Andes is also one of the most vulnerable ecoregions worldwide due to a long history of anthropogenic transformations. One of the major obstacles for generating conservation plans is gaps in knowledge about the status and threats to many groups of Andean biodiversity, especially invertebrates. Focusing on three important beetle groups (i.e., Coleoptera: ground beetles, rove beetles and dung beetles) in the tropical Andes, we performed a systematic review of scientific literature retrieving 50 studies that allowed us to assess the degree of knowledge across the region, disturbance types, and biodiversity metrics used. We found a high representation of studies in Colombia, compared with other Andean countries. We also found a marked bias among taxonomic groups, topics or metrics evaluated, with dung beetles the most represented group, particularly in studies addressing forest conversion using metrics such as species richness or abundance. We reveal large gaps in information on the diversity of ground and rove beetles, and in the use of other diversity metrics. The lack of information across countries makes it difficult to generalize results and points to the need for more research, especially in under‐represented countries such as Bolivia and Venezuela. Including complementary response metrics, such as biomass, functional diversity or ecological functions, will improve the assessment of human impacts on tropical Andean beetle communities and wider ecosystems.

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Section: Discussionmentioning

confidence: 99%

Knowledge of ground‐dwelling beetle communities in the tropical Andes: Gaps and trends

López‐Bedoya,

Magura,

Méndez‐Rojas

et al. 2023

Austral Ecology

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“…Canthon rutilans rutilans adults remained buried in the ground longer than adults of C. rutilans cyanescens , which moved on the ground more. This difference may be related to environmental temperature, as the soil has a temperature‐buffering capacity and C. rutilans rutilans , the characteristically 'cold' subspecies, may avoid low temperatures by staying underground (Lobo et al, 2019). Temperature variation did not influence the feeding patterns in the two subspecies in contrast to the influence of temperature on reproductive behaviour.…”

Section: Discussionmentioning

confidence: 99%

Differences in the reproductive behaviour and larval development of two Canthon rutilans subspecies reinforce their thermal regional segregation

Hensen

Lobo²,

Hernández

2020

Entomologia Exp Applicata

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Two dung beetle subspecies of Canthon rutilans Castelnau (Coleoptera: Scarabaeidae, Scarabaeinae), C. rutilans rutilans and C. rutilans cyanescens, inhabit different environmental temperature conditions in southern Brazil. We developed a laboratory breeding experiment with 60 pairs of individuals of the two subspecies at five temperature conditions (from 15 to 35 °C) to compare the influence of temperature on the behaviour of adults and the development of larvae. The behavioural patterns of the adults in both subspecies differ according to temperature. The size of food balls was smaller and lighter in C. rutilans cyanescens. Although temperature did not influence the feeding behaviour (measured as the number of food balls made), reproductive behaviour (measured as the number of brood balls made by pair) was significantly lower at 15 °C for both subspecies. Besides that, brood balls from C. rutilans rutilans were bigger and heavier at lower temperatures. The number of offspring and the time of emergence depend on temperature too. However, the weight of the offspring and the longevity of adults depend on the subspecies and temperature treatment. These results demonstrate that the subspecies have different thermal adaptations: C. rutilans rutilans has reproductive behaviour adapted to living under colder and broader conditions than C. rutilans cyanescens.

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“…Ambient temperature is an excellent variable in predicting Neotropical dung beetle species richness (Lobo et al, 2018). Although some dung beetle species can slightly control their body temperature (e.g., Verdú and Lobo, 2008;Gallego et al, 2018); they are animals that depend on environmental temperature to perform their physiological functions, with an ideal temperature range (Chown, 2001;Sheldon et al, 2011).…”

Section: Spatial Seasonality and Temporal Samplingmentioning

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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Exploring the predictive performance of several temperature measurements on Neotropical dung beetle assemblages: Methodological implications

Cited by 7 publications

References 24 publications

Knowledge of ground‐dwelling beetle communities in the tropical Andes: Gaps and trends

Knowledge of ground‐dwelling beetle communities in the tropical Andes: Gaps and trends

Differences in the reproductive behaviour and larval development of two Canthon rutilans subspecies reinforce their thermal regional segregation

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

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