Variation in the diversity of semiaquatic bugs (Insecta: Heteroptera: Gerromorpha) in altered and preserved veredas

Giehl, Núbia França da Silva; Cabette, Helena Soares Ramos; Dias-Silva, Karina; Juen, Leandro; Moreira, Felipe Ferraz Figueiredo; Castro, Lourivaldo Amâncio de; Ferreira, Victor Rennan Santos; Batista, Joana Darc

doi:10.1007/s10750-020-04364-1

Cited by 10 publications

(13 citation statements)

References 62 publications

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“…This increase in landscape conversion results in changes in the limnological conditions and the aquatic biota of streams in the Cerrado (Calvão et al, 2018), in the Amazon forest (Montag et al, 2019), and the transition between these two formations (Vieira et al, 2015). Those landscape changes are also taking place in the veredas, even though they are areas of permanent protection by the Brazilian legislation (Giehl et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…We measured 12 limnological environmental variables and landscape metrics that are considered important in assessing the level of environmental impact and in predicting Heteroptera and Odonada assemblages (Brasil et al, 2020b;Giehl et al, 2020): (1) air temperature, (2) nitrate, (3) ammonia, (4) turbidity, (5) water temperature, (6) dissolved oxygen (OD), (7) potential hydrogen (pH), (8) electric conductivity, (9) total dissolved solids (TDS), (10) oxidation-reduction potential (ORP), (11) luminosity, and (12) landscape change (Supplementary Table S1). To measure the chemical variables, we sampled 500 ml of water from each vereda in polyethylene bottles.…”

Section: Environmental Variables and Landscape Metricsmentioning

confidence: 99%

“…These are open habitats with high light incidence when compared to other Cerrado streams, especially those draining forest formations, which result in important differences in the trophic composition of aquatic communities (Brasil et al, 2014b). Despite all that, the veredas' environmental conditions and aquatic biodiversity have suffered intense anthropogenic pressures, especially from cattle-raising activities (Giehl et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Among the predatory aquatic insects, the Odonata (dragonflies and damselflies) and Heteroptera (true bugs) orders stand out as sensitive to habitat change (Dias-Silva et al, 2010;Miguel et al, 2017;Brasil et al, 2020a). Even though we know that both Odonata and Heteroptera communities are affected by pond and dam construction (Brasil et al, 2014a;De Marco et al, 2014;Klein et al, 2018), there is no knowledge of how their communities respond to these environmental changes in veredas (Vilela et al, 2016;Giehl et al, 2020). Biological diversity can be measured in different ways, divided into three main components: alpha (α), beta (β), and gamma (γ).…”

Section: Introductionmentioning

confidence: 99%

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Dams Change Beta Diversity of Aquatic Communities in the Veredas of the Brazilian Cerrado

et al. 2021

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The veredas are wetland ecosystems responsible for supplying most of the water for rivers and streams in the Cerrado. The veredas’ hydromorfic soils retain a large amount of rainwater, releasing it slowly during drier periods. Therefore, these habitats are often used to build dams for cattle raising. Here we assessed the environmental conditions and beta-diversity of Odonata and Heteroptera on veredas impacted by dams in the Brazilian Cerrado. We sampled biological communities and a set of environmental variables in 13 veredas, six with dams and seven without dams. One limnological variable [oxidation–reduction potential (ORP)] and one landscape metric (% of the altered area) differed among veredas with and without dams. These variables were important predictors of the beta-diversity of both Odonata (R2 = 0.650; p < 0.001) and Heteroptera (R2 = 0.740; p < 0.001). The veredas stand among the most sensitive wetland ecosystems of the Cerrado. In this study, we show, for the first time, that veredas with dams may lose environmental quality resulting in changes in biological communities, especially ecologically unique species. Because the Cerrado naturally goes through approximately 5 months of severe drought, the veredas are critical for the Cerrado’s hydric safety. Therefore, we recommend that cattle-raising activities should rely on artificial water tanks instead of using dams for water storage since it affects ecologically unique species in this poorly known ecosystem.

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Section: Discussionmentioning

confidence: 99%

Section: Environmental Variables and Landscape Metricsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dams Change Beta Diversity of Aquatic Communities in the Veredas of the Brazilian Cerrado

et al. 2021

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“…Usualmente se refugian en la vegetación ribereña y pueden formar grupos de 40 individuos o más (Padilla-Gil, 2020). Por lo general, los factores que más afectan la presencia de hemípteros en los cuerpos de agua son la dimensión de los ríos, la velocidad de la corriente, los ecosistemas circundantes, la vegetación acuática y ribereña, y la composición química del medio acuático (Hufnagel, Bakonyi, & Vásárhelyi, 1999;Karaouzas & Gritzalis, 2006;Giehl, Fonseca, Dias-Silva, Brasil, & Cabette, 2015;Giehl et al, 2020).…”

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Efecto de las aguas jabonosas sobre el comportamiento de hemípteros semiacuáticos (Gerromorpha) de dos ecosistemas acuáticos neotropicales

2021

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Introducción: Los hemípteros semiacuáticos son insectos que podrían ser de los mejores indicadores de la calidad del ambiente acuático, específicamente en cuanto al contenido de sustancias que rompen la tensión superficial. Sin embargo, no existen estudios que evalúen cómo estos insectos se ven afectados por cambios en la tensión superficial del agua. Objetivo: Determinar el efecto que tienen las aguas jabonosas sobre la capacidad de locomoción de tres especies de hemípteros semiacuáticos neotropicales. Métodos: Desde agosto hasta noviembre 2020, realizamos experimentos ex situ, con nueve grupos de diez individuos de la familia Veliidae (N = 90) y Gerridae (N = 90), en donde cada grupo individualmente, fue sometido a la entrada de aguas jabonosas durante tres minutos. Para esto, diseñamos un acuario que consistía en tres cajas de plástico a diferentes alturas, conectadas entre sí, de modo que se generaba un flujo de corriente. Utilizamos jabón en polvo para ropa, jabón líquido para manos, y jabón en barra para platos. De cada tipo de jabón preparamos una concentración baja (9 ppm), media (50 ppm) y alta (200 ppm). Mediante grabaciones, registramos el tiempo que duraron los hemípteros en el agua, así como su capacidad para salir de la misma, y si se hundían o no. Resultados: Encontramos que, sin importar el tipo de jabón, el tiempo que permanecen los hemípteros en el agua contaminada, se reduce drásticamente conforme aumenta la concentración, pero dicho impacto varía según la especie, siendo Rhagovelia solida (familia Veliidae) menos afectada por la contaminación en comparación con Platygerris caeruleus y Potamobates unidentatus (familia Gerridae). Conclusión: El uso de estos táxones como indicadores del grado de contaminación de los ríos por detergentes y jabones, puede ser muy útil, sobre todo si se toma en cuenta las diferencias de sensibilidad según la familia o género del grupo.

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Effects of environmental factors and ecological integrity on semiaquatic bugs (Hemiptera: Heteroptera: Gerromorpha) diversity in Cerrado streams

Franco,

Cunha,

de Azevêdo

et al. 2023

J Insect Conserv

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Variation in the diversity of semiaquatic bugs (Insecta: Heteroptera: Gerromorpha) in altered and preserved veredas

Cited by 10 publications

References 62 publications

Dams Change Beta Diversity of Aquatic Communities in the Veredas of the Brazilian Cerrado

Dams Change Beta Diversity of Aquatic Communities in the Veredas of the Brazilian Cerrado

Efecto de las aguas jabonosas sobre el comportamiento de hemípteros semiacuáticos (Gerromorpha) de dos ecosistemas acuáticos neotropicales

Effects of environmental factors and ecological integrity on semiaquatic bugs (Hemiptera: Heteroptera: Gerromorpha) diversity in Cerrado streams

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