Trichoptera as bioindicators of habitat integrity in the Pindaíba river basin, Mato Grosso (Central Brazil)

Pereira, Lílian Ribeiro; Cabette, Helena Soares Ramos; Juen, Leandro

doi:10.1051/limn/2012018

Cited by 37 publications

(23 citation statements)

References 38 publications

(36 reference statements)

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“…Sensitive taxa such as trichoperans and Odonata respond to variations in canopy cover [30]. Monteiro-Junior et al [40] have shown that species richness of zygopterans is correlated positively with the integrity of riparian vegetation.…”

Section: Discussionmentioning

confidence: 99%

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Measurement of the Ecological Integrity of Cerrado Streams Using Biological Metrics and the Index of Habitat Integrity

Reis

Salazar

Machado

et al. 2017

Insects

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Generally, aquatic communities reflect the effects of anthropogenic changes such as deforestation or organic pollution. The Cerrado stands among the most threatened ecosystems by human activities in Brazil. In order to evaluate the ecological integrity of the streams in a preserved watershed in the Northern Cerrado biome corresponding to a mosaic of ecosystems in transition to the Amazonia biome in Brazil, biological metrics related to diversity, structure, and sensitivity of aquatic macroinvertebrates were calculated. Sampling included collections along stretches of 200 m of nine streams and measurements of abiotic variables (temperature, electrical conductivity, pH, total dissolved solids, dissolved oxygen, and discharge) and the Index of Habitat Integrity (HII). The values of the abiotic variables and the HII indicated that most of the streams have good ecological integrity, due to high oxygen levels and low concentrations of dissolved solids and electric conductivity. Two streams showed altered HII scores mainly related to small dams for recreational and domestic use, use of Cerrado natural pasture for cattle raising, and spot deforestation in bathing areas. However, this finding is not reflected in the biological metrics that were used. Considering all nine streams, only two showed satisfactory ecological quality (measured by Biological Monitoring Working Party (BMWP), total richness, and EPT (Ephemeroptera, Plecoptera, and Trichoptera) richness), only one of which had a low HII score. These results indicate that punctual measures of abiotic parameters do not reveal the long-term impacts of anthropic activities in these streams, including related fire management of pasture that annually alters the vegetation matrix and may act as a disturbance for the macroinvertebrate communities. Due to this, biomonitoring of low order streams in Cerrado ecosystems of the Northern Central Brazil by different biotic metrics and also physical attributes of the riparian zone such as HII is recommended for the monitoring and control of anthropic impacts on aquatic communities.

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Section: Discussionmentioning

confidence: 99%

“…Impacted environments are sites with HII between 0.51 and 0.66. Altered environments have HII between 0.69 and 0.78, and preserved environments have HII varying from 0.82 to 0.96 [30]. …”

Section: Methodsmentioning

confidence: 99%

Measurement of the Ecological Integrity of Cerrado Streams Using Biological Metrics and the Index of Habitat Integrity

Reis

Salazar

Machado

et al. 2017

Insects

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“…Em rios de região temperada, o desmatamento tem provocado alterações nas assembleias de macroinvertebrados, devido às mudanças na entrada de luz, variação de temperatura, níveis de nutrientes, tamanho das partículas do substrato, distribuição e disponibilidade dos recursos alimentares afetando drasticamente a integridade dos ambientes aquáticos (Bojsen e Jacobsen 2003). Padrões similares de modificação na estrutura da comunidade tem sido detectado na região tropical (Dias- Silva et al 2010;Pereira et al 2012;Silva-Pinto et al 2012) incluindo região Amazônica (Monteiro-Júnior et al 2013;Oliveira-Júnior et al 2013).…”

Section: Introductionunclassified

Composição e riqueza de Odonata (Insecta) em riachos com diferentes níveis de conservação em um ecótone Cerrado-Floresta Amazônica

et al. 2014

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A retirada ou a substituição da vegetação ripária provoca uma alteração no ambiente físico, no fluxo sazonal e na qualidade química da água. Essas modificações podem causar a diminuição da riqueza pela extinção local de espécies. O objetivo deste trabalho foi avaliar o efeito do distúrbio da integridade ambiental sobre a riqueza e composição de espécies de Odonata adultos em córregos com diferentes níveis de conservação, na Bacia do Rio Suiá-Missu, Mato Grosso, Brasil. As modificações nos sistemas aquáticos afetaram a comunidade de Odonata, provavelmente devido às exigências ecofisiológicas e comportamentais relacionadas a adultos e larvas. Anisoptera, que necessitam de ambientes com maior incidência de sol devido ao tamanho do corpo, apresentaram maior riqueza de espécies em ambientes com menor cobertura vegetal. Por outro lado, os Zygoptera geralmente habitam riachos com cobertura vegetal mais densa, e por isso, apresentaram um decréscimo de sua riqueza em locais alterados, devido à maior entrada de luz e/ou variação do calor. Assim, para as duas subordens, as alterações ambientais não precisam ser severas para produzir modificações significativas na composição, indicando que os serviços ecossistêmicos poderiam ser perdidos, mesmo com alterações parciais do meio físico. PALAVRAS-CHAVE: ambientes aquáticos; biodiversidade; integridade ambiental; libélulas. Composition and richness of Odonata (Insecta) in streams with different levels of conservation in a Cerrado-Amazonian Forest ecotone ABSTRACTThe removal or substitution of riparian vegetation causes disturbance in physical environment, seasonal water flow and water chemical quality. These modifications can cause decrease in species richness by local extinctions. The aim of this study was to examine the effect of disturbance in the physical environmental on the richness and species composition of Odonata adults in streams with different levels of conservation in the river Suiá-Missu basin, Mato Grosso, Brazil. Modifications in the aquatic systems affected the Odonata community, probably because their ecophysiological and behavioral requirements of adults and larvae. Anisoptera species, which require sunny environments because of their body size, had higher species richness in environments with low plant cover. On the other hand, Zygoptera species, which generally inhabit streams with dense vegetation, presented a decrease in richness in disturbed environments, as a result high sunlight radiation and/or variations in temperature. Hence, in both suborders, environmental perturbations do not need to be severe to change species composition, indicating that ecosystem services could be lost, even with only partial alterations in physical environment.

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“…Dias-Silva et al (2010) found a reduction in the species richness of Gerromorpha (Heteroptera) with decreasing habitat integrity, for example, while Silva-Pinto et al (2012), detected morphometric asymmetries in odonates. Pereira et al (2012) recorded alterations in the species composition of an assemblage of Trichoptera, while Carvalho et al (2013) observed a shift in the species richness of odonates, and Brasil et al (2013) recorded a reduction in the abundance of shredder leptophlebiids. Leptoblebiids have also been shown to be good indicators in other parts of the world.…”

Section: Effects Of the Environmental Gradientmentioning

confidence: 99%

“…The final index varies from zero to one, with the highest scores referring to the most intact environments. The index has been used in a number of studies of environmental impact, and has produced good results for the analysis of the communities of a number of taxonomic groups of aquatic insects across different regions (e.g., Dias-Silva et al, 2010;Silva et al, 2010;Souza et al, 2011;Pereira et al, 2012;Silva-Pinto et al, 2012;Brasil et al, 2013;Carvalho et al, 2013).…”

Section: Collection Of Environmental Datamentioning

confidence: 99%

The effects of environmental integrity on the diversity of mayflies, Leptophlebiidae (Ephemeroptera), in tropical streams of the Brazilian Cerrado

Brasil¹,

Juen²,

Cabette³

2014

Ann. Limnol. - Int. J. Lim.

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-Aquatic insects are widely distributed, and are especially diverse and abundant in tropical streams, where they play an important role in the food chain due to their diversity of feeding strategies, and the potential for the transfer of energy between aquatic and terrestrial environments. The intimate relationship found between these insects and environmental variables means that they are often used as bioindicatorss in environmental studies. We tested the hypothesis that the loss of environmental integrity in tropical streams will lead to a loss of species and a decline in the abundance of mayflies (Leptophlebiidae), in addition to a change in species composition, and the dynamics of population. Collect immature leptophlebiids in 18 streams representing different degrees of conservation, in the Brazilian Cerrado. The environmental integrity of the sites was assessed using a Habitat Integrity Index (HII), which generates values of zero (degraded) to one (preserved), based on soil use, the extension and conservation of riparian forest, as well as morphological features of the stream. A total of 4945 immature leptophlebiids were collected and identified as belonging to 16 species or morphospecies. On an average, a reduction of 0.1 in the value of the HII led to the loss of five specimens and one species. The composition of the communities varied systematically along the environmental gradient, with more sensitive species being found only when the index was above a threshold of 0.6. The importance of the riparian vegetation for the aquatic biota, especially its role in the mitigation of impacts from the surrounding matrix, supports the universal conservation of this type of habitat.

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Trichoptera as bioindicators of habitat integrity in the Pindaíba river basin, Mato Grosso (Central Brazil)

Cited by 37 publications

References 38 publications

Measurement of the Ecological Integrity of Cerrado Streams Using Biological Metrics and the Index of Habitat Integrity

Measurement of the Ecological Integrity of Cerrado Streams Using Biological Metrics and the Index of Habitat Integrity

Composição e riqueza de Odonata (Insecta) em riachos com diferentes níveis de conservação em um ecótone Cerrado-Floresta Amazônica

The effects of environmental integrity on the diversity of mayflies, Leptophlebiidae (Ephemeroptera), in tropical streams of the Brazilian Cerrado

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