Egg‐laying traits reflect shifts in dragonfly assemblages in response to different amount of tropical forest cover

Rodrigues, Marciel Élio; Roque, Fábio de Oliveira; Ferreira, Rhainer Guillermo Nascimento; Saito, Victor S.; Samways, Michael J.

doi:10.1111/icad.12319

Cited by 32 publications

(47 citation statements)

References 71 publications

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“…**** Species found only in areas with riparian vegetation of over 50 m in width. Rodrigues et al 2016, Rodrigues et al 2018a, Calvão et al 2018. Our results showed that areas of veredas classified as VRP have different Odonata communities to those found in areas classified as VRA.…”

Section: Discussionmentioning

confidence: 57%

“…The dragonflies were collected between November 2014 and January 2015. A standardized collection effort was adopted in each sampled stretch, as used in other studies (Rodrigues et al 2016, Calvão et al 2018, Rodrigues et al 2018a. The sweeping method was used to collect the samples, with a 1-hour sampling effort performed by two collectors (total of two hours per point) on a 100-meter stretch.…”

Section: Sampling and Identificationmentioning

confidence: 99%

“…Due to the ecological and behavioral characteristics of the species, they can positively or negatively select such environments (Corbet 2004, Simaika & Samways 2009. The characteristics of the species that can reflect the conditions of vereda areas include the ability to thermoregulate, disperse, oviposition behavior, and environmental requirements for developing larvae and maintaining adults (De Marco et al 2015, Monteiro-Junior et al 2014, Monteiro-Junior et al 2015, Rodrigues et al 2018a, Calvão et al 2018.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, we expected the communities of the areas with riparian vegetation to be made up of species with thermoregulatory characteristics adapted to environments with limited light, low temperature variation (conformers) (De and epiphytic oviposition behaviors (laying of eggs on roots, leaves and trunks at the oviposition sites) . Areas surrounded by riparian vegetation maintain a more stable temperature and offer more sites for oviposition and habitats for larval development (Monteiro-Junior et al 2014, Monteiro-Junior et al 2015, Calvão et al 2018, Rodrigues et al 2018a. In the communities of the areas considered to have altered or absent riparian vegetation, we expected to find species adapted to environments with a high availability of light and high temperatures (heliothermic or endothermic) (De and displaying endophytic or exophytic oviposition behaviors (species that lay eggs inside plants or directly into the water column, respectively) (Calvão et al 2018, Rodrigues et al 2018a.…”

Section: Introductionmentioning

confidence: 99%

“…Areas surrounded by riparian vegetation maintain a more stable temperature and offer more sites for oviposition and habitats for larval development (Monteiro-Junior et al 2014, Monteiro-Junior et al 2015, Calvão et al 2018, Rodrigues et al 2018a. In the communities of the areas considered to have altered or absent riparian vegetation, we expected to find species adapted to environments with a high availability of light and high temperatures (heliothermic or endothermic) (De and displaying endophytic or exophytic oviposition behaviors (species that lay eggs inside plants or directly into the water column, respectively) (Calvão et al 2018, Rodrigues et al 2018a. These ecological and behavioral characteristics of the group act as filters and select species of communities that can be considered as bioindicators of the environmental conditions of aquatic ecosystems and their surroundings (Carvalho et al 2013, Monteiro-Junior et al 2014, Monteiro-Junior et al 2015, Calvão et al 2018, Rodrigues et al 2018a.…”

Section: Introductionmentioning

confidence: 99%

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Dragonflies as Indicators of the Environmental Conditions of Veredas in a Region of Central-Western Brazil

2019

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Veredas (palm swamps) play a critical role in maintaining the hydrological system and they are considered the cradle of the waters of the Brazilian Cerrado. Currently, veredas are suffering intense human pressure due to the conversion of native landscapes for other land uses as agriculture, pasture and urban environments. Few studies have evaluated the biodiversity of veredas and the current effects of human impact, especially on aquatic communities. Dragonflies and damselflies (Odonata) have excelled as bioindicators of environmental quality and they are increasingly used in environmental monitoring programs. In this study, we evaluate whether loss of riparian vegetation around the vereda areas alters the communities of Odonata and whether the species can be considered bioindicators of these environmental conditions. Our hypothesis is that eco-physiological and behavioral characteristics, such as thermoregulation capacity and oviposition behavior, influence the persistence of species in communities in natural or altered environments. We sampled 25 veredas and classified them into two groups, namely "preserved riparian vegetation" (VRP), when the riparian vegetation surrounding the sampled stretch was 30 meters or more, and "altered riparian vegetation" (VRA), when the vegetation extended for less than 30 meters from at least one of the banks. Our results showed that the composition of the communities in areas classified as VRP was more similar to each other and different from the communities found in the areas classified as VRA. Of the 52 species observed, 11 species responded as indicators for preserved or altered riparian vegetation. Of these species, four were indicative of areas with preserved riparian vegetation and seven were indicative of veredas with altered riparian vegetation. Our results show that the composition of dragonflies and damselflies, and some taxa in particular may be potential indicators of the condition of veredas, and may, therefore, be included in vereda monitoring programs in Central-Western Brazil.

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Section: Discussionmentioning

confidence: 57%

Section: Sampling and Identificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dragonflies as Indicators of the Environmental Conditions of Veredas in a Region of Central-Western Brazil

2019

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Amazonian Odonata Trait Bank

Ferreira

Resende

Bastos

et al. 2023

Ecology and Evolution

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Discussion regarding the gaps of knowledge on Odonata is common in the literature.Such gaps are even greater when dealing with basic biological data for biodiverse environments like the Amazon Rainforest. Therefore, studies that address, classify, and standardize functional traits allow the elaboration of a wide range of ecological and evolutionary hypotheses. Moreover, such endeavors aid conservation and management planning by providing a better understanding of which functional traits are filtered or favored under environmental changes. Here, our main goal was to produce a database with 68 functional traits of 218 Odonata species that occur in the Brazilian Amazon. We extracted data on behavior, habit/habitat (larvae and adults), thermoregulation, and geographic distribution from 419 literature sources classified into different research areas. Moreover, we measured 22 morphological traits of approximately 2500 adults and categorized species distributions based on approximately 40,000 geographic records for the Americas. As a result, we provided a functional matrix and identified different functional patterns for the Odonata suborders, as well as a strong relationship between the different trait categories. For this reason, we recommend the selection of key traits that represent a set of functional variables, reducing the sampling effort. In conclusion, we detect and discuss gaps in the literature and suggest research to be developed with the present Amazonian Odonata Trait Bank

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Rare eggshell structure in Odonata: Lindenia tetraphylla (Van der Linden) (Anisoptera: Gomphidae)

Salur,

Suludere

2024

Microscopy Res & Technique

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Lindenia tetraphylla (Van der Linden, 1825) eggs exhibit an egg structure that is very rare in other Gomphidae species. They have a well‐developed surface reticulation structure. The anterior pole of the egg has a small, rounded micropylar area consisting of seven orifices arranged radially around a central area. The posterior pole has a sessile, truncated cone that carries 55–65 coiled filaments. The filament structure found at the posterior pole of the egg has been observed in the gomphid species Lestinogomphus africanus (Fraser, 1926), Ictinogomphus australis (Selys, 1873), and I. rapax (Rambur, 1842). However, L. tetraphylla eggs differ from these species in both morphology and filament structure. This study provides a detailed analysis of the ultrastructure of L. tetraphylla eggs using scanning electron microscopy, and the functional and taxonomic significance of the eggshell are discussed.Research Highlights The aim of this study is to examine the ultrastructure of the L. tetraphylla eggshell, emphasizing its function and taxonomic value. In this context, the general morphology of the egg, the reticulations on its surface, the micropylar region and micropylar structure, and the posterior filament coil were examined. In this study, the ultrastructure of L. tetraphylla egg was examined for the first time using scanning electron microscopy (SEM). As a result of the examination, it was detected for the first time that the posterior filament coil, which is rarely seen in odonate eggs, is also present in L. tetraphylla eggs. By comparing the L. tetraphylla egg with the eggs of I. ferox, I. rapax, I. australis, and L. africanus species, which are similar in terms of the posterior filament coil, the features that distinguish the L. tetraphylla egg.

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Egg‐laying traits reflect shifts in dragonfly assemblages in response to different amount of tropical forest cover

Cited by 32 publications

References 71 publications

Dragonflies as Indicators of the Environmental Conditions of Veredas in a Region of Central-Western Brazil

Dragonflies as Indicators of the Environmental Conditions of Veredas in a Region of Central-Western Brazil

Amazonian Odonata Trait Bank

Rare eggshell structure in Odonata: Lindenia tetraphylla (Van der Linden) (Anisoptera: Gomphidae)

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