A interferência da sazonalidade sobre os grupos funcionais tróficos de invertebrados bentônicos presentes em substrato rochoso no Rio Palmital, União da Vitória – PR

Delonzek, Edina Costa; Krawczyk, Ana Carolina de Deus Bueno

doi:10.5007/2175-7925.2016v29n3p29

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…The highest abundance of aquatic invertebrates was observed in autumn,such seasonal change probably reflect variations in hydrological conditions suitable for aquatic insects (DELONZEK & KRAWCZYK, 2016;GIAM et al, 2017), such as different rainfall rates, which influence the amount of water present in streams, which directly affect aquatic insect abundance (BISPO et al, 2006;BISPO & OLIVEIRA, 2007). In the sampling region, the period with the lowest rainfall occurs in autumn, which may explain this higher abundance, considering that flood events can generate a reduction in the richness and abundance of aquatic macroinvertebrates (WREGE et al, 2012;THEODOROPOULOS et al, 2017).…”

Section: Discussionmentioning

confidence: 98%

Aquatic insects in plateau streams in Southern Brazil: a functional feeding group analysis

Mario Arthur Favretto,

Emili Bortolon dos Santos,

Osvaldo Onghero-Jr.

2023

ABC

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Aquatic insects are bioindicators regarding the quality of streams environments. The present study aimed to analyze the community of aquatic insects in streams from the Santa Catarina Plateau, in Brazil. Insects were classified according to their functional trophic structure as gathering-collectors, filtering-collectors, shredders, swallower-predators, perforator-predators and scrapers. Autotrophy and heterotrophy indices were calculated to evaluate the ecological conditions of the sampled streams. Associations between shredders and the riparian vegetation index, filtering-collector index, riverbed stability index, and predator-prey index were performed. The sampled streams demonstrated that the insects inhabiting these environments respond to the strong seasonality observed in the study region, an area located at high altitudes (over 1,200 m a.s.l.) that suffers harsh winters with snow events. This is also reflected in the seasonal heterotrophy and autotrophy index variations noted herein, with higher autotrophy observed during spring and summer. The relationship detected between shredder insects and riparian vegetation indicates that the sampled region may be suffering from deforestation, due to the low contribution of plant matter to the stream waters. However, as many nearby areas are characterized by natural grasslands, it is possible that it is actually an inherent characteristic of the sample area.

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Section: Discussionmentioning

confidence: 98%

Aquatic insects in plateau streams in Southern Brazil: a functional feeding group analysis

Mario Arthur Favretto,

Emili Bortolon dos Santos,

Osvaldo Onghero-Jr.

2023

ABC

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“…Each artificial substrate consisted of a rectangular (8.0 × 6.0 × 2.5 cm) concrete block, with a total area of 210 cm 2 , composed of cement (40%), fine sand (40%) and rocks (20%). Each natural substrate consisted of a set of nine river rocks, each about 2.8 cm in diameter, washed and dried on a wire mesh (1 cm mesh), with the total surface adapted to (1.5 × 1.2 cm) substrate (Carvalho & Uieda, 2004;Delonzek & Krawczyk, 2016).…”

Section: Samplingmentioning

confidence: 99%

Colonization of benthic invertebrates on artificial and natural substrate in a Neotropical lotic environment in Southern Brazil

Camargo

Lehun

Rosa

et al. 2019

Acta Sci. Biol. Sci.

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The objective of this research was to validate the colonization process on natural and artificial substrates by benthic invertebrates in a tropical stream in South Brazil. The samples were performed in July and August-2012, and 32 samplers were used, being 16 natural and 16 artificial substrates. In each sample, two replicas were taken for each substrate at the 2th, 4th, 7th, 14th, 21th 28th, 35th and 42th days of colonization. The organisms were identified to the lowest possible taxonomic level. In both substrates 3,070 benthic invertebrates were detected, of which 1,753 individuals were collected on the natural substrate, and 1,317 on the artificial substrate. From the identified taxa 8.5% were not dominant (Anacroneuria, Orthocladiinae, Tupiara, Smicridea, Baetodes, Tupiperla, Macrogynoplax, Gripopteryx, Cylloepus, Macrelmis, Microcylloepus, Hetaerina, Argia, Coryphaeschna, Atopsyche, Pomacea, Corydalus, Leptohyphes and Eccoptura), and 31.5% were dominant (Tanypodinae, Chironominae, and Paragripopteryx). The genus Simulium was very common, dominant and abundant, representing 65% of the collected individuals. No significant difference was found in the abundance and species composition between artificial and natural substrates. On the natural substrate, the higher colonization index was at the 35th day with 459 individuals, and the lowest was at the 14th day, with 87. On the artificial substrate the highest index was at the 42th day with 337 individuals, and the lowest was at the 4th day, with 85. Both natural and artificial substrates are efficient in characterizing the benthic community. In the evaluation of the ecological succession, it was not possible to observe a pattern that described the process, since the composition was nearly constant throughout the study period.

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A interferência da sazonalidade sobre os grupos funcionais tróficos de invertebrados bentônicos presentes em substrato rochoso no Rio Palmital, União da Vitória – PR

Cited by 2 publications

References 6 publications

Aquatic insects in plateau streams in Southern Brazil: a functional feeding group analysis

Aquatic insects in plateau streams in Southern Brazil: a functional feeding group analysis

Colonization of benthic invertebrates on artificial and natural substrate in a Neotropical lotic environment in Southern Brazil

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