Sampling Methods for Dragonflies and Damselflies

Cezário, Rodrigo Roucourt; Firme, Paloma Pena; Pestana, Gabrielle Cristina; Vilela, Diogo Silva; Juen, Leandro; Cordero‐Rivera, Adolfo; Guillermo, Rhainer

doi:10.1007/978-3-030-53226-0_9

Cited by 13 publications

(9 citation statements)

References 60 publications

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“…The species of the suborders Anisoptera and Zygoptera were collected using the “fixed area transect” method or the “Odonate Sampling Protocol” (OSP) 34 . We collected specimens within a total of 20 5-m segments at each stream (100 m of total sampling effort at each site).…”

Section: Methodsmentioning

confidence: 99%

Impact of environmental changes on the behavioral diversity of the Odonata (Insecta) in the Amazon

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The odonates are insects that have a wide range of reproductive, ritualized territorial, and aggressive behaviors. Changes in behavior are the first response of most odonate species to environmental alterations. In this context, the primary objective of the present study was to assess the effects of environmental alterations resulting from shifts in land use on different aspects of the behavioral diversity of adult odonates. Fieldwork was conducted at 92 low-order streams in two different regions of the Brazilian Amazon. To address our main objective, we measured 29 abiotic variables at each stream, together with five morphological and five behavioral traits of the resident odonates. The results indicate a loss of behaviors at sites impacted by anthropogenic changes, as well as variation in some morphological/behavioral traits under specific environmental conditions. We highlight the importance of considering behavioral traits in the development of conservation strategies, given that species with a unique behavioral repertoire may suffer specific types of extinction pressure.

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Section: Methodsmentioning

confidence: 99%

Impact of environmental changes on the behavioral diversity of the Odonata (Insecta) in the Amazon

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Ferreira

Brasil

et al. 2021

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“…Collected adults were stored in glassine envelopes (Cezário et al 2020), kept in pure acetone during 12 hours and dried for 30 minutes under direct solar irradiation. The identification occurred at species level following the keys of Lencioni (2017), Garrison et al (2006Garrison et al ( , 2010, Needham et al (2000), and genus specific literature (e.g., revisions, synopses and species description).…”

Section: Samplingmentioning

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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“…For the collection, we used a fixed-area scanning method that has already been efficiently applied to survey the Odonata assemblages in the Amazon [33]. In addition, this is the sampling protocol that was proposed for Odonata in a recent publication standardizing the methodology of Arthropod studies [34]. Adult specimens were collected along a fixed stretch of 100 m of each stream, divided into 20 segments of 5 m, according to the best way to access sites to perform the collection.…”

Section: Biological Samplingmentioning

confidence: 99%

Response of the Zygopteran Community (Odonata: Insecta) to Change in Environmental Integrity Driven by Urbanization in Eastern Amazonian Streams

2021

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The accelerated and disordered growth of large urban centers has caused a significant loss of biodiversity and the negative effects are more significant in aquatic environments. Thus, the objective of this study is to assess the effects of environmental change due to urbanization in the abundance and biomass patterns of species belonging to the Zygoptera suborder. We tested the hypothesis that, in altered streams, there will be a predominance of organisms with fast growth and small biomass (r-strategists), and intermediate streams will have an overlapping of r and k-strategists. In control streams, there will be a predominance of k-strategists, with slow growth, decreased abundance, and high biomass. Urban expansion in Amazonian streams will cause loss of Zygoptera species richness. Streams draining urban areas will have higher air temperatures than control streams. Thus, small-sized and less abundant species will be favored. We sampled 15 streams in the metropolitan area of Belém. Sites were classified, using the index of physical habitat integrity, as control, intermediate and altered. Comparisons between biomass and abundance were analyzed using W Statistics. Our analyses showed that: the effects of urbanization cause loss of k-strategists and favors r-strategists, once abundance was placed above biomass; in intermediate environments, contrary to what we expected, there was no overlapping of strategies, once r-strategists were also placed above k-strategists; in control environments, biomass was placed above abundance, suggesting these environments have a predominance of k-strategist species, as we suggested; and we observed increased levels of temperature favor the most abundant species, the ones having generalist biological mechanisms; however, contrary to what we expected, there was no difference in richness. With these results, we reinforce the need for public policies to create or maintain the riparian forest along streams running through urban areas and create or maintain urban parks.

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Sampling Methods for Dragonflies and Damselflies

Cited by 13 publications

References 60 publications

Impact of environmental changes on the behavioral diversity of the Odonata (Insecta) in the Amazon

Impact of environmental changes on the behavioral diversity of the Odonata (Insecta) in the Amazon

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

Response of the Zygopteran Community (Odonata: Insecta) to Change in Environmental Integrity Driven by Urbanization in Eastern Amazonian Streams

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