Macrozoobenthos response to environmental degradation in a heavily modified stream: Case study the Upper Elbe River, Czech Republic

Adámek, Zdeněk; Orendt, Claus; Wolfram, Georg; Sychra, Jan

doi:10.2478/s11756-010-0043-5

Cited by 11 publications

(9 citation statements)

References 16 publications

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“…Many studies have sought to identify the patterns of macroinvertebrate distribution in both large geographical areas (Heino et al 2002) and small ones (Adámek et al 2010), showing a strong relationship between aquatic biota and environmental variables (Bonada et al 2005). To understand these influences on the composition of Oligochaeta assemblages in the Iguaçu River, we performed a canonical correspondence analysis (CCA).…”

Section: Discussionmentioning

confidence: 99%

Using oligochaeta assemblages as an indicator of environmental changes

et al. 2012

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We designed a field survey (the entire river length; not dammed: First and Second plateaus; dammed: Third Plateau) to test the hypothesis that the cascade of reservoirs promoted a reduction in species richness and changed the composition of Oligochaeta assemblage along the Iguaçu River. Changes in environmental variables and in richness and composition of Oligochaeta were summarized by Canonic Correspondence Analysis. Along the Iguaçu River, conductivity, and altitude decreased, whereas temperature increased. Oligochaeta composition showed a significant spatial variation, with higher abundances of the family Tubificidae and the genus Dero (Naididae) occurring in the First Plateau. In the Second and Third plateaus, few species were dominant, with increases in the presence of species of Naididae below dams. We found a clear decrease in species richness along the Iguaçu River. Moreover, we found that Oligochaeta assemblage was influenced by some environmental variables such as altitude, conductivity, substrate type and temperature, and by anthropogenic activities (human occupation and damming). The results supported the use of Oligochaeta as surrogate taxa to predict environmental changes along impacted (dammed and eutrophic) rivers. The validity of this was indicated by the strong and significant gradient registered, from the headwater to mouth of the Iguaçu River.Keywords: surrogate taxa, reservoir cascade, geomorphologic gradient, human occupation, Iguaçu River. Usando assembléias de Oligochaeta como um indicador de mudanças ambientais ResumoFoi delineada uma pesquisa de campo (toda extensão do rio; não barrado: Primeiro e Segundo planaltos; barrado: Terceiro planalto) para testar a hipótese de que a cascata de reservatórios promove redução na riqueza de espécies e muda a composição da assembléia de Oligochaeta ao longo do Rio Iguaçu. Mudanças nas variáveis ambientais e na riqueza e composição de Oligochaeta foram sumarizadas por Análise de Correspondência Canônica. Ao longo do Rio Iguaçu, a condutividade e a altitude diminuíram, enquanto a temperatura aumentou. A composição de Oligochaeta mostrou variação espacial significativa, com maiores abundâncias da família Tubificidae e do gênero Dero (Naididae) ocorrendo no Primeiro planalto. No Segundo e Terceiro planaltos, poucas espécies foram dominantes, com aumento na presença de espécies de Naididae abaixo de barragens. Foi encontrada uma clara diminuição na riqueza de espécies ao longo do Rio Iguaçu. Além disso, observou-se que a assembléia de Oligochaeta foi influenciada por algumas variáveis ambientais, como altitude, condutividade, tipo de substrato e temperatura, e por atividades antropogênicas (ocupação humana e barramento). Os resultados deste estudo suportam o uso de Oligochaeta como táxon substituto para predizer mudanças ambientais ao longo de rios impactados (barrados e eutróficos). A validade desse estudo foi indicada pelo forte e significativo gradiente, registrado da cabeceira à foz do Rio Iguaçu.Palavras-chave: taxon substituto, cascata de r...

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Section: Discussionmentioning

confidence: 99%

Using oligochaeta assemblages as an indicator of environmental changes

et al. 2012

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“…Bleak, roach and chub formed the majority of the fi sh community in the Elbe River (Jurajda et al, 2010b), where Adámek et al (2010) reported a saprobity index in the range 1.97-2.46. In the Dyje River the index of saprobity was more favourable, as both localities exhibited better betamesosaprobity (1.70-1.80; Sukop et al, 2010), thus enabling barbel to be eudominant in Tasovice.…”

Section: : Relations Between Environmental Variables and Fish Speciementioning

confidence: 99%

The influence of changes to abiotic parameters on the fish assemblage structure of a lowland stream

Vítek¹,

Kopp²,

Mareš³

et al. 2013

Acta Univ. Agric. Silvic. Mendelianae Brun.

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VÍTEK, T., KOPP, R., MAREŠ, J., BRABEC, T., SPURNÝ, P.: The infl uence of changes to abiotic parameters on the fi sh assemblage structure of a lowland stream. Acta univ. agric. et silvic. Mendel. Brun., 2012, LX, No. 3, pp. 207-216 Ichthyological monitoring and the assessment of 16 physical and chemical parameters of the water environment were conducted at two localities on the Dyje River, Czech Republic, at diff erent distances downstream from the Znojmo Reservoir (at 12 and 31 km) to reveal habitat alterations. Canonical correspondence analysis confi rmed that diff erences in fi sh abundance between localities were infl uenced by diff erent hydrological regimes characterized by discharge and fl ow velocities and also by water conductivity, which increased with the distance from the reservoir. The infl uence of chemical parameters of water related to water quality on fi sh assemblage structure was insignifi cant. The second locality (further from the reservoir) was characterised by substantial water shortage during the vegetation season. Changes in hydrological regime and the loss of connectivity in the Dyje River both connected with dam building and water shortage for irrigation have led to dramatic changes in the fi sh assemblage structure since the 1950s and the complete loss of common nase.

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“…Therefore, macroinvertebrate studies have been used for water quality assessments by several environmental monitoring programmes (Rosenberg and Resh, 1993;Dar and Ganai, 2017). While biological diversity in rivers is usually influenced by a combination of pressures from various anthropogenic impacts (Adámek et al, 2010), communities in headwater streams are affected namely by water velocity and associated physical forces (Allan and Castillo, 2007). Thus, in mountain streams an adequate dynamic approach reflecting rapidly changing currents and discharge needs to be considered in analysing their water environment.…”

Section: Introductionmentioning

confidence: 99%

Impacts of an extreme flood on the ecosystem of a headwater stream

et al. 2021

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Headwater streams are the smallest parts of rivers but make up the majority of river miles. The chemistry and macroinvertebrate composition of such streams are among the most important indicators of their environmental health. Macroinvertebrates are affected namely by runoff genesis and, in many regions of the world, also by acid atmospheric deposition and its consequences. The aim of this paper is to evaluate the impacts of an extreme summer flash flood on the physical environment, chemistry and macroinvertebrates in a small headwater stream located in the Beech-woods National Nature Reserve of the Jizera Mts. (Northern Bohemia, Czech Republic). The studied stream is characterized by a pluvial hydrologic regime with perennial streamflow uniformly distributed within the year, with peak-flows originating mainly from summer rainstorms, and moderate current anthropogenic acidification. During the observed summer flash flood of the return period near 1,000 years, high currents (1-2.5 m s-1) flushed out 2.7 m3 of sand and gravel from the streambed, resulting in a devastating effect on macroinvertebrates. Both number of species/taxa and diversity were reduced by about 50% while the abundance of surviving taxa was reduced to about 10% compared with before the flood. The following spring after the event, both number of species/taxa, diversity and abundance increased, partially due to the temporary unsuccessful colonization of the site by several alien species creating a peak of biological diversity, but complete recovery of the original macroinvertebrate assemblages was not observed even during the subsequent two years. On the other hand, a significant drop in sulphate contents and rising alkalinity observed in stream waters during base flow conditions after the flood indicate positive effects on recovery of the aquatic environment by depleting the catchment sulphur pool. Thus, the flood did not significantly alter the long-term recovery of the studied headwater stream from acidification.

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Macrozoobenthos response to environmental degradation in a heavily modified stream: Case study the Upper Elbe River, Czech Republic

Cited by 11 publications

References 16 publications

Using oligochaeta assemblages as an indicator of environmental changes

Using oligochaeta assemblages as an indicator of environmental changes

The influence of changes to abiotic parameters on the fish assemblage structure of a lowland stream

Impacts of an extreme flood on the ecosystem of a headwater stream

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