“…The same variations observed for the indices: total diversity and EOT taxa in the stations, could be explained by the fact that they reveal the same information on the ecological state of the site. Total-taxa and the EOT index would be more suitable for evaluating the quality of stagnant water than the EPT taxa, which have been recognized as very good indicators of riverine ecosystems integrity (Myers et al, 2011;Kaboré et al, 2016a;Masese and Raburu, 2017;Jerves-Cobo et al, 2017). The absence of plecopterans may be due to the fact that the water in the reservoir is stagnant.…”
Section: Discussionmentioning
confidence: 99%
“…But benthic macroinvertebrates are recognized as very good indicators, and are the most commonly used (Nyamsi et al, 2014;Kaboré et al, 2016a, c;Gerami et al, 2016;Arimoro and Muller, 2010). This is due to: (a) their sedentary nature, which facilitates spatial analyses of pollution effects, (b) the sensitivity of many common species are well-documented for different types of pollutants (Myers et al, 2011), and (c) the long life cycles of some species, which make them more cost-effective tools to trace pollution effects over longer periods (Heino and Peckarsky, 2014). Habitats degradation, land uses, hydromodification and water pollution can be monitored by assessing benthic macroinvertebrates community structure, and indicators species (Flores and Zafalara, 2012;Kambwiri et al, 2014;Kaboré et al, 2016a;Patang et al, 2018).…”
In West Africa, particularly in Burkina Faso, the aquatic ecosystems are under human pressures. Therefore, for long term management of these ecosystems, the managers need baseline data for regular assessment of ecological health condition. In this regard, the structure of the benthic macroinvertebrate community was investigated and the relationship between the environmental variables and biotic indices of the Samandéni reservoir from January to December 2018, after one-year impoundment was explored. The macroinvertebrates were collected with a hand net (25 × 25 cm 2 coverage area and 500 μm mesh) according to the multi-habitat sampling method. Key environmental variables such as temperature, conductivity, dissolved oxygen, pH and total dissolve solids (TDS) were measured in situ. High diversity of macroinvertebrates was reported and thirty-four (34) taxa were determined belonging to eight (8) orders dominated by insects (79.41% of all taxa). Good ecological quality of the reservoir was testified by the presence of several sensitive taxa like Ephemeroptera and Trichoptera. The trends of environmental variables also reflect good habitat conditions. The results revealed a strong and negative relationship between some abiotic variables and biotic indices. The finding of this study is of big importance for sustainable management of the Samandéni Reservoir.
“…The same variations observed for the indices: total diversity and EOT taxa in the stations, could be explained by the fact that they reveal the same information on the ecological state of the site. Total-taxa and the EOT index would be more suitable for evaluating the quality of stagnant water than the EPT taxa, which have been recognized as very good indicators of riverine ecosystems integrity (Myers et al, 2011;Kaboré et al, 2016a;Masese and Raburu, 2017;Jerves-Cobo et al, 2017). The absence of plecopterans may be due to the fact that the water in the reservoir is stagnant.…”
Section: Discussionmentioning
confidence: 99%
“…But benthic macroinvertebrates are recognized as very good indicators, and are the most commonly used (Nyamsi et al, 2014;Kaboré et al, 2016a, c;Gerami et al, 2016;Arimoro and Muller, 2010). This is due to: (a) their sedentary nature, which facilitates spatial analyses of pollution effects, (b) the sensitivity of many common species are well-documented for different types of pollutants (Myers et al, 2011), and (c) the long life cycles of some species, which make them more cost-effective tools to trace pollution effects over longer periods (Heino and Peckarsky, 2014). Habitats degradation, land uses, hydromodification and water pollution can be monitored by assessing benthic macroinvertebrates community structure, and indicators species (Flores and Zafalara, 2012;Kambwiri et al, 2014;Kaboré et al, 2016a;Patang et al, 2018).…”
In West Africa, particularly in Burkina Faso, the aquatic ecosystems are under human pressures. Therefore, for long term management of these ecosystems, the managers need baseline data for regular assessment of ecological health condition. In this regard, the structure of the benthic macroinvertebrate community was investigated and the relationship between the environmental variables and biotic indices of the Samandéni reservoir from January to December 2018, after one-year impoundment was explored. The macroinvertebrates were collected with a hand net (25 × 25 cm 2 coverage area and 500 μm mesh) according to the multi-habitat sampling method. Key environmental variables such as temperature, conductivity, dissolved oxygen, pH and total dissolve solids (TDS) were measured in situ. High diversity of macroinvertebrates was reported and thirty-four (34) taxa were determined belonging to eight (8) orders dominated by insects (79.41% of all taxa). Good ecological quality of the reservoir was testified by the presence of several sensitive taxa like Ephemeroptera and Trichoptera. The trends of environmental variables also reflect good habitat conditions. The results revealed a strong and negative relationship between some abiotic variables and biotic indices. The finding of this study is of big importance for sustainable management of the Samandéni Reservoir.
“…Canada: NB, NS, ON, PE, PQ ( DeWalt et al 2013 ), NF (New provincial record); USA: AL, DE, IA, IN, KY, MA, ME, MI, MN, MS, NC, OH, PA, SC, TN, VA, WI, WV ( DeWalt et al 2013 ), MD ( Grubbs 1997 ), NY ( Myers et al 2011 ), TN (New state record).…”
The Nearctic genus Prostoia (Plecoptera: Nemouridae) is reviewed. Prostoia ozarkensis
sp. n. is described from the male and female adult stages mainly from the Interior Highland region encompassing portions of Arkansas, Missouri, and Oklahoma. Prostoia ozarkensis
sp. n. appears most closely related to two species, one distributed broadly across the western Nearctic region, P. besametsa (Ricker), and one found widely throughout the central and eastern Nearctic regions, P. completa (Walker). A surprising range extension is noted for P. hallasi Kondratieff & Kirchner, a species once known only from the Great Dismal Swamp, from small upland streams in southern Illinois. Additional new state records are documented for P. besametsa, P. completa, P. hallasi and P. similis (Hagen). Taxonomic keys to Prostoia males and females are provided, and scanning electron micrographs of adult genitalia of all species are given.
“…The absence of effects in the density of Trichoptera by golden mussels can be expressed by the inherent characteristics of the natural habitat and species (Strayer et al, 2011;Marçal & Callil, 2012;Uhde et al, 2012;. Trichoptera presents varying degrees of tolerance to natural and anthropogenic disturbances, making them excellent indicators of ecosystem health (Myers et al, 2011), but the taxa sampled are naturally favored in shallow lakes. Considering the environmental data, our results demonstrate that the community of Trichoptera living in association with E. crassipes has a successful adaptability to environmental conditions in the water of the Pantanal floodplain.…”
Aim: Information on the influence of mussel macrofouling in invertebrate communities usually have the initial assumption of negative interference. Methods: We analyzed this relationship in a community of aquatic invertebrates associated to roots of Eichhornia crassipes in 15 shallow marginal lakes in the Pantanal National Park and surroundings. We sampled quadrants of floating vegetation, identified the aggregate fauna and evaluated the density effect of Limnoperna fortunei, as well as abiotic factors of the Trichoptera community using ordinances and multivariate regressions. Results: We found no significant relationship between the abundance of mussels on the macrophytes and the Trichoptera larvae. However, we observed an interference of oxygen on the structure and density of genera. The composition and abundance of the phytophylous caddisfly community is influenced by the depth and the concentration of oxygen dissolved in the marginal regions of the lakes. Conclusions: We suggest that the absence of the effects of the assessed L. fortunei in the community is related to the 'biotic resistance', in which the phytophylous caddisfly demonstrated adaptation to an environment characterized by hypoxic conditions in the dry season. L. fortunei was limited by the depth and reduction of oxygen, presenting lower density in lakes with such characteristics.Keywords: aquatic invertebrates; bio invaders; golden mussel; wetlands.Resumo: Objetivo: Informações sobre a influência de macroaglomerados de mexilhão em comunidades de invertebrados geralmente apresentam o pressuposto inicial de interferência negativa. Métodos: Analisamos essa relação em uma comunidade de invertebrados aquáticos associados a raízes de Eichhornia crassipes em 15 lagoas marginais rasas, no Parque Nacional do Pantanal e áreas adjacentes. Amostramos quadrantes da vegetação flutuante, identificamos a fauna associada e avaliamos o efeito da abundância de Limnoperna fortunei e fatores abióticos sobre a comunidade de Trichoptera, utilizando ordenações e regressões multivariadas. Resultados: Não encontramos relação significativa da abundância de mexilhão nas macrófitas sob as larvas Trichoptera. Entretanto, observamos a interferência do oxigênio na estrutura e abundância dos gêneros.A composição e abundância da comunidade de tricópteros fitófilos é influenciada pela profundidade e oxigênio dissolvido na região marginal das lagoas. Conclusões: Sugerimos que a ausência de efeitos de L. fortunei na comunidade avaliada está relacionada com a 'resistência biótica' na qual os tricópteros fitófilos demonstraram adaptação ao ambiente caracterizado por condições de hipoxia na estação seca, enquanto que L. fortunei foi limitado pela profundidade e redução de oxigênio, apresentando menores densidades em lagoas com essas características.Palavras-chave: invertebrados aquáticos; bioinvasores; mexilhão dourado; áreas úmidas.
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