Effects of urbanization on the fauna of Odonata on the coast of southern Brazil

Sganzerla, Cleber; Dalzochio, Marina Schmidt; Prass, Gabriel; Périco, Eduardo

doi:10.1590/1676-0611-bn-2020-1122

Cited by 11 publications

(3 citation statements)

References 48 publications

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“…Also, due to either sensitivity or tolerance to environmental stressors, some species are considered to be indicator species of ecosystem health(Bybee et al, 2016;Lamelas-López et al, 2017;Nasirian & Irvine, 2017). For instance, an analysis bySganzerla et al (2021) revealed that two morphospecies found in our system: Erythrodiplax sp. and T. simulata, were strongly associated with non-urbanised areas.…”

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confidence: 95%

Conductivity and water level modulate developmental plasticity and explain distribution patterns in a diverse neotropical Odonata assemblage

et al. 2023

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Developmental plasticity can help organisms to survive in temporally variable environments. However, it is not well understood how variation in life history plasticity helps species coexist in heterogeneous environments. Here, we investigate the extent to which life‐history plasticity explains species distributions in a diverse assemblage of odonates in a tropical freshwater rock pool system characterized by substantial variation in pond permanence. Some dragonflies and damselflies (Odonata) can accelerate their development to leave the water before their habitat dries. However, how they sense habitat drying is poorly understood. Here, we experimentally tested the extent to which elevated concentrations of salts in water or reductions in water level can be used as cues for developmental acceleration in a neotropical Odonata assemblage from granite rock pools. Libellulidae dragonflies were found along the permanence gradient and accelerated their growth in response to elevated dissolved salts (measured as conductivity). Anax amazili (Aeshnidae) was also found in all environments and did the same in response to lower water levels. In turn, larvae of the damselfly Telebasis simulata (Coenagrionidae) were restricted to deeper long‐lived pools and did not respond to the tested cues. Differentiation in life‐history strategies can contribute to niche differentiation in this diverse predator assemblage. Developmental plasticity triggered by different cues helps odonates avoid mortality and exploit short‐lived habitats. The global acceleration of freshwater salinisation due to human activities might disrupt the delicate links between low levels of dissolved salts and life‐history responses and represent a significant threat to these ecosystems and their biodiversity.

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confidence: 95%

Conductivity and water level modulate developmental plasticity and explain distribution patterns in a diverse neotropical Odonata assemblage

et al. 2023

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“…Modifications generated by land use, such as monoculture, livestock and urban areas, replace native vegetation by exotic species and impermeable surfaces (i.e., buildings), resulting in local microclimate change and other aquatic and terrestrial physicochemical characteristics of riparian zones (McKinney 2002, Wen et al 2017, Brasil et al 2021). These effects convert natural environments into areas with homogeneous biotic and abiotic characteristics that also affect the diversity and composition of odonates (Calvão et al 2018, Renner et al 2018, Borges et al 2021, Sganzerla et al 2021. In anthropic areas, sensitive species (e.g., some Zygoptera) are substituted by generalist groups with tolerant traits (e.g., multivoltine, r-strategist and heliothermic), often simplifying odonate communities (De Marco et al 2015, Dalzochio et al 2018b, Oliveira-Júnior & Juen 2019.…”

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confidence: 99%

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

et al. 2021

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Remaining freshwater systems are historically under threat mainly due to human activities such as agriculture and urbanization. The consequences of such activities are innumerous, and among them there is a decrease of suitable habitats for threatened fauna. In the Brazilian Cerrado, the odonatofauna of palm swamps and riparian forests are still poorly explored, a fact that difficult conservation efforts of the group. Thus, we performed an inventory in several urban and rural sites containing these phytophysiognomies in Uberlândia, Triângulo Mineiro region, western Minas Gerais state. In total, we found 101 Odonata species, seven families and 46 genera in the municipality, with 76 and 66 species, respectively, belonging to palm swamp and forest sites. From this diversity, eight species were first records in the state of Minas Gerais: Neuraeschna claviforcipata Martin, 1909, Phyllocycla cf. medusaBelle, 1988, Diastatops intensa Montgomery, 1940, Oligoclada pachystigma Karsch, 1890, O. xanthopleura Borror, 1931, Angelagrion nathaliaeLencioni, 2008, Telebasis sanguinalis Calvert, 1909 and Telebasis simulacrum (Calvert, 1909). We also sampled Erythrodiplax anaGuillermo-Ferreira & Vilela 2016, a species listed as endangered (EN) by the IUCN red list. Additionally, we include some taxonomic notes of Forcepsioneura machadorum females, a newly discovered species in the region. Our results contribute to the Odonata database in Brazil and highlights the importance inventories in poorly explored aquatic ecosystems.

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“…Modifications generated by urbanization replace native vegetation with exotic species and impervious surfaces, resulting in local microclimatic changes and other aquatic and terrestrial physical-chemical characteristics of riparian zones (McKinney 2008;Brasil et al 2021). These effects convert natural environments into areas with homogeneous biotic and abiotic characteristics that also affect the diversity and composition of odonates (Villalobos-Jiménez and Hassal 2016;Prescott and Eason 2018;Sganzerla et al 2021). Commonly, sensitive species are excluded and replaced by generalist groups with tolerant characteristics (eg, greater dispersion), often simplifying communities of odonates (Dutra and De Marco 2014;De Marco et al 2015;Dalzochio et al 2018;Oliveira-Junior and Junior 2019).…”

Section: Introductionmentioning

confidence: 99%

Effects of urbanization on the diversity, life-history traits and fluctuating asymmetry of odonates (Odonata: Zygoptera and Anisoptera)

Silva¹

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Urbanization has grown progressively and changing drastically and rapidly natural habitats, threatening the viability of sensitive groups. Little is known about the diversity and taxonomy of dragonflies from urban areas of the Cerrado, although some studies show that this environment can contribute to filling Linnean and Wallacean gaps. In addition, studies on the plastic responses of odonates under urbanization and extreme climate events are still emerging and rare in the Neotropical region. In this thesis, we investigated how urbanization can affect diversity and plastic responses of odonates, both for local urban conditions and future climate events. To achieve these objectives, we first performed an extensive inventory of the group in various ecosystems and phytophysiognomies of the Cerrado in urban and non-urban areas between 2018 and 2020 in Uberlândia, Minas Gerais. This inventory composed the first chapter. From these samples we separated two damselflies species (Acanthagrion truncatum Selys, 1876 and Argia reclusa Selys, 1865), representing different ecosystems, and that are abundant among urbanization gradients and within urban areas. These samples were part of the second chapter, which aimed to evaluate the morphometric and stress responses (evaluated by fluctuating asymmetry) of the group's wings in under urbanization, more specifically to fragmentation, and local preservation of urban fragments. Finally, in the third chapter, we conducted an experiment with larvae to verify the effect of future heat waves on A. truncatum life history traits, sampled in urban pons. In the first chapter, we described the female of Forcepioneura machadorum Vilela, Venâncio & Santos, 2020 (Coenagrionidae: Protoneurinae) and sampled 101 species in urban and non-urban areas of Uberlândia, eight of these were new records for Minas Gerais. In the second chapter, we helped to fill knowledge gaps about the effects of urbanization on morphological traits and asymmetry of damselflies along urbanization gradients. For A. truncatum, we observed a negative effect on wing size, while the preservation of urban fragments proved to be an important factor for the size and shape of this trait for A. reclusa. Finally, we demonstrate in the third chapter that exposure of larvae to heat waves results in phenological advance and reduction in the size of urban adults of A. truncatum, a pattern that can affect the future viability of this species in this type of land use. Thus, the results of this thesis showed that we still know little about how urbanization can affect diversity and plastic and ontogenetic responses of odonates. Especially in the Neotropical region, where urbanization and climate change come too much and quickly growing, there is the urgency of further studies of the group.

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Effects of urbanization on the fauna of Odonata on the coast of southern Brazil

Cited by 11 publications

References 48 publications

Conductivity and water level modulate developmental plasticity and explain distribution patterns in a diverse neotropical Odonata assemblage

Conductivity and water level modulate developmental plasticity and explain distribution patterns in a diverse neotropical Odonata assemblage

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

Effects of urbanization on the diversity, life-history traits and fluctuating asymmetry of odonates (Odonata: Zygoptera and Anisoptera)

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