Does Heat Tolerance Explain Female Polymorphism in Damselflies?

Castillo-Pérez, E. Ulises; Nava-Bolaños, Ángela; Rocha‐Ortega, Maya; Córdoba‐Aguilar, Alex

doi:10.1007/s10905-021-09767-z

Cited by 2 publications

(1 citation statement)

References 41 publications

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“…Differences in thermal tolerance were also reported in butterflies, dung flies, fruit flies and parasitoid wasps (Blanckenhorn et al, 2014; David et al, 2005; Karl et al, 2009; Nguyen et al, 2013). Higher thermal tolerance allows females to forage for longer periods of time than males, and maximize nutrient acquisition and egg production (Castillo‐Pérez et al, 2021; Koenig, 2008; Serrano‐Meneses et al, 2008; Suhonen et al, 2008). Therefore, analyses on the vulnerability of a species to global warming must include estimates of physiological thermal tolerance and behaviour for both sexes.…”

Section: Discussionmentioning

confidence: 99%

Environment, taxonomy and morphology constrain insect thermal physiology along tropical mountains

2022

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1. Tropical mountains display limited variation in monthly temperatures, but high spatial climatic variability. It is assumed this stability promotes ecological and physiological adaptations to local temperatures, which may preclude dispersal up or downslope. Determining how environmental, taxonomic and morphological factors affect thermal limits is fundamental to understand biotic responses to global warming. 2. We selected 54 species of dragonflies and damselflies (Order Odonata) distributed from 300 to 2,550 m along one of the most biodiverse regions on the planet, the Tatamá elevational gradient in the Andean-Choco region transition.We estimated for 846 individuals three thermal tolerance parameters: CT max , the highest temperature preceding the loss of motor control, T vol , the temperature at which individuals avoid heat, and CT min , the minimum temperature required for wing movement.3. For each thermal tolerance parameter, we evaluated associations between physiological and behavioural responses, species elevational distribution and specialization to forests or open areas. We also evaluated the effect of autecological characteristics such as body mass, sex and taxonomy on temperature regulation. 4. Temperatures prevalent at different elevations and habitats are associated with odonate upper thermal limits. However, tolerance to low temperatures is not associated with habitat use or elevation. Forest species display lower thermal tolerances. Small species are more tolerant to high temperatures than larger species.Dragonflies are more tolerant to high temperatures than damselflies with similar body mass. Females are more tolerant to high temperatures than males. 5. Our results highlight the importance of considering differences in morphology, life history and behaviour when comparing thermal tolerances of organisms along elevational gradients. Only by incorporating such factors, it would be possible to generate accurate predictions on the impact of climate change on tropical organisms.

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Section: Discussionmentioning

confidence: 99%

Environment, taxonomy and morphology constrain insect thermal physiology along tropical mountains

2022

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Use of the Zygoptera/Anisoptera Ratio (Insecta: Odonata) for Habitat Alteration Assessment in Cerrado Streams

Da Silva Junior,

Calvão,

Carvalho

et al. 2023

IJO

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Natural landscapes of Latin America, such as the Cerrado biome, are increasingly changing due to conflicting development models between economic growth and biodiversity conservation. In cases of total or partial suppression of natural vegetation, more sunlight reaches the streams, leading to changes in Odonata assemblages. Due to their thermoregulation characteristics, the proportion of the suborder Anisoptera tends to increase whereas the suborder Zygoptera will decrease, as this suborder is more sensitive to habitat loss. We assessed whether the proportions of individuals and species richness of Zygoptera and Anisoptera changed due to environmental quality loss in Cerrado stream habitats. Also, we assessed the performance of ratios using genus and family level. We conducted our study at 18 streams in Mato Grosso State, Brazil. We sampled Odonata communities and measured the environmental quality of each stream using the Habitat Integrity Index. To assess the relationship between the environmental quality of the streams and the Odonata ratios, we performed generalized linear models with the beta distribution family. The models showed that the loss of environmental integrity caused Zygoptera to decrease and Anisoptera to increase. In addition, we found that <em>Acanthagrion</em>/Zygoptera and <em>Argia</em>/Zygoptera ratios showed a strong relationship with habitat integrity, being plausible alternatives for use in monitoring programs. We conclude that the Zygoptera/Anisoptera ratio is a good indicator of environmental quality for the Cerrado biome and therefore makes for a suitable tool for citizen science programs in which no taxonomic expertise is required.

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Does Heat Tolerance Explain Female Polymorphism in Damselflies?

Cited by 2 publications

References 41 publications

Environment, taxonomy and morphology constrain insect thermal physiology along tropical mountains

Environment, taxonomy and morphology constrain insect thermal physiology along tropical mountains

Use of the Zygoptera/Anisoptera Ratio (Insecta: Odonata) for Habitat Alteration Assessment in Cerrado Streams

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