Environmental drivers and composition of assemblages of immature odonates (Insecta) in a subtropical island in southern Brazil

Pires, Mateus Marques; Siegloch, Ana Emília; Hernández, Malva Isabel Medina; Petrucio, Maurício Mello

doi:10.1590/s2179-975x8017

Cited by 9 publications

(6 citation statements)

References 33 publications

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“…In fact, the predominance in stony substrates (e.g. stones and gravel) is in line with studies on the odonates in streams from subtropical Brazil (Carvalho & Nessimian, 1998;Assis et al, 2004;Pires et al, 2020). Thus, the synergy between substrate type (organic: litter), differences in the input in litter amount and in water flow in each microhabitat likely converged for the effects of the interaction of substrate type with riparian widths in driving odonate composition.…”

Section: Discussionsupporting

confidence: 82%

“…Because of the seasonal sampling design of the study (winter and summer samplings) and prior evidence of seasonal dynamics in odonate communities in southern Brazil (Pires et al, 2014(Pires et al, , 2019(Pires et al, , 2020, we first assessed whether Odonata community composition changed between seasons before proceeding to the main analyses. For this purpose, we carried out a non-parametric multivariate analysis of variance (PERMANOVA; 9999 permutations) with the raw dataset (N = 72; three tributaries x four reaches x three substrate x two seasons).…”

Section: Discussionmentioning

confidence: 99%

“…Earlier studies in subtropical streams showed that larvae from Zygoptera families (Calopterygidae, Coenagrionidae) prefer organic substrates (e.g., litter) due to their clinging ability, while some genera from Libellulidae (Brechmorhoga) and Gomphidae (Progomphus) are more associated with inorganic substrates (e.g. gravel, stones) because they can either burrow or sprawl across these microhabitats (Carvalho & Nessimian, 1998;Assis et al, 2004;Pires et al, 2020). In addition, substrate type can be influenced by changes in riparian vegetation through modification in the input amount of sediment and allochthonous matter, which affect the in-stream environment, and, consequently, the aquatic insect community (Shilla & Shilla, 2012;Mendes et al, 2019Mendes et al, , 2020.…”

Section: Introductionmentioning

confidence: 99%

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Influence of different riparian vegetation widths and substrate types on the communities of larval Odonata (Insecta) in southern Brazilian streams

et al. 2020

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Aim We assessed the influence of substrate type and categories of riparian vegetation widths on the community structure of Odonata (Insecta) in southern Brazilian streams. Methods Sampling took place in twelve stream reaches differing in their riparian vegetation widths (from more than 40 m up to less than 5 m). Larval odonates were collected in inorganic (stone and gravel) and organic (leaf litter) substrates at each stream reach. Differences in Odonata composition among substrates and categories of riparian vegetation width were tested using PERMANOVA and visualized with ordination diagrams. In addition, we assessed the influence of riparian vegetation width taking into account two levels of resolutions: fine (four categories: > 40 m, 30-15 m, 15-5 m and < 5 m) and coarse (narrower and broader than 15 m). Results Odonata composition differed more strongly according to substrate type regardless of the level of resolution. Organic substrate (litter) had different composition and higher richness than inorganic ones. Odonata composition significantly differed between riparian vegetation widths at the coarser level of resolution (narrower and broader than 15 m); at the coarser level, the interaction between substrate and riparian widths was significant, with the composition from litter substrate in broader widths differing from stone and gravel in narrower widths. Conclusions The composition of odonate larvae responded to the major reductions in riparian widths (above > 15 m), indicating that reductions above this level are enough to affect the community structure of Odonata. Additionally, the different composition of Odonata in organic substrates in broader riparian vegetation widths compared to inorganic substrates in narrower widths indicate a complex relationship between riparian vegetation and substrate in the assembly of insect communities in southern Brazilian forest streams. The interaction between riparian vegetation widths and substrate suggests that the effects of reductions in riparian widths on Odonata composition are not similar across substrate types.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of different riparian vegetation widths and substrate types on the communities of larval Odonata (Insecta) in southern Brazilian streams

et al. 2020

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“…Odonates are important indicators of habitat quality due to the group's high diversity and sensitivity to environmental changes (Carvalho & Nessimian, 1998;Mendes et al, 2015). Additionally, because they are predators, they play an important role in aquatic trophic webs (Corbet, 1999;Pires et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Habitat conditions in streams influence Odonata larval assemblages in the eastern Amazon

Ribeiro¹,

Juen²,

Brasil³

2022

IJO

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The growth of agricultural and mining activities in the Amazon has impacted land-use and caused significant changes in the local environmental conditions of streams. In the face of these changes, our study aimed at assessing how environmental changes affect Odonata larval assemblages in streams in the eastern Amazon. We hypothesized that habitat conditions in streams are strong predictors of Odonata larval assemblages. We sampled 30 headwater streams (1st through 3rd order) in the eastern Amazon. We corroborated our hypothesis that regional- and local-scale environmental changes are important predictors of the Odonata larval assemblage structure. These results indicate that environmental conditions within the stream channel are important to maintain Odonata larval assemblages, as they provide important resources for larval development. For new studies, we recommend the assessment of temporal dynamics to evaluate whether these patterns are stable across time. Finally, evaluating various environmental scales of the original impact is extremely relevant for preventing the deterioration of or recuperating aquatic assemblages in Amazonian streams, considering the ongoing rapid environmental changes and deforestation in the region. Here we demonstrate that in-stream environmental conditions are important to assemblage structure and this must be considered in environmental restoration plans.

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“…Odonata are important components of aquatic food chains because they are top predators in these ecosystems (Anderson & Semlitsch, 2016;Pinto, 2016), feeding on other aquatic insects, as well as fry and tadpoles. Furthermore, the fauna of Odonata is widely used in ecological studies of environmental monitoring and evaluation, since many taxa, even at the suborder level, are sensitive to environmental changes (Corbet, 1999;De Marco, Batista, & Cabette, 2015;Pinto, 2016), with mesohabitats and substrates present in the streams being major predictors of the composition of larvae (Mendes, Benone, & Juen, 2019;Pires, Siegloch, Hernández, & Petrucio, 2020) and conditions of the gallery forest being a potential predictor for adults (De Marco et al, 2015;Juen, Oliveira-Junior, Shimano, Mendes, & Cabette, 2014).…”

Section: Introductionmentioning

confidence: 99%

Congruence of the composition of Odonata between dry and rainy seasons in the Maranhense Cerrado

Moura

Couceiro

Juen

et al. 2020

International Journal of Odonatology

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Nos riachos tropicais a sazonalidade tem forte influência sobre a heterogeneidade, alterando os recursos disponíveis e ocasionando o carreamento de organismos, substrato e matéria orgânica. Provocando mudanças nas variáveis limnológicas, bem como na composição de espécies. O objetivo de nosso trabalho foi avaliar a congruência de resposta da comunidade de Odonata em duas estações sazonais em riachos da transição entre Cerrado e Caatinga. Foram amostrados 10 riachos afluentes do rio Itapecuru em Caxias, no leste do Maranhão nos meses de julho a dezembro de 2017 (menor precipitação) e em janeiro a junho de 2018 (maior precipitação). Um total de 386 espécimes foram coletados sendo 160 na estação de menor precipitação e 226 para a estação de maior precipitação. Não houve congruência de resposta para a ordem Odonata entre as estações, no entanto, para as subordens separadamente, Zygoptera apresentou alta congruência de imaturo, mas não houve para Anisoptera. Assim, em ambientes que enfrentam um forte estresse hídrico e devido as diferenças ecofisiológicas das subordens, a amostragem de apenas um período sazonal não fornece dados consistentes sobre a composição das espécies (Zygoptera apresentou semelhança na composição entre os dois períodos, mas não para Anisoptera), perdendo informações importantes sobre a diversidade local. Se o foco é a biodiversidade, o uso de subordinados pode estabelecer padrões de diversidade e adaptação entre as estações, tendo em vista as diferenças ecofisiológicas existentes.

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Environmental drivers and composition of assemblages of immature odonates (Insecta) in a subtropical island in southern Brazil

Cited by 9 publications

References 33 publications

Influence of different riparian vegetation widths and substrate types on the communities of larval Odonata (Insecta) in southern Brazilian streams

Influence of different riparian vegetation widths and substrate types on the communities of larval Odonata (Insecta) in southern Brazilian streams

Habitat conditions in streams influence Odonata larval assemblages in the eastern Amazon

Congruence of the composition of Odonata between dry and rainy seasons in the Maranhense Cerrado

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