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Braukmann, Ulrich

doi:10.1023/a:1011452014258

Cited by 26 publications

(10 citation statements)

References 6 publications

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“…Besides the abundant representatives of the families Nemouridae and Leuctridae (mainly Leuctra nigra) the predatory stonefly Diura bicaudata is also highly resistant to acidification (Braukmann 2001). Consistent with previous results (Horecký et al 2006), this species was recorded only at sites with pH higher than 4.5.…”

Section: Discussionsupporting

confidence: 89%

“…(Soldán et al1998). The absence of the other two mayflies at this site could be due to low alkalinity compared to JIZ as it is considered a similarly important parameter as pH (Braukmann 2001).…”

Section: Discussionmentioning

confidence: 99%

“…At these sites, the water pH was between 4.07-4.57 and alkalinity was negative. This shows an exhausted acid neutralizing capacity and such streams are considered permanently strongly acidified (Braukmann 2001). The sites LIL and JIZ are characterized by large fluctuations in pH, and after the Braukmann classification fall into the group of periodically acidified streams with acid episodes during snowmelts or long-term intensive rains.…”

Section: Discussionmentioning

confidence: 99%

“…In addition to the acid-tolerant species Plectrocnemia conspersa (Scheibová & Helešic 1999), caddisflies (Trichoptera) are also often represented by the family Limnephilidae in acidified streams (Guérold et al 1995;Braukmann 2001). Especially some species of the tribes Chaetopterygini and Stenophylacini [e.g., Pseudopsilopteryx zimmeri (Mac Lachlan, 1876) and Allogamus uncatus (Brauer, 1857)] are very resistant to low pH.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, Elodes (Scirtidae) and Limnius (Elmidae), which were recorded only at the moderately acidified JIZ and non-acidified PLB, are considered less acid-resistant genera (Braukmann 2001).…”

Section: Discussionmentioning

confidence: 99%

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Differences in benthic macroinvertebrate structure of headwater streams with extreme hydrochemistry

Horecký

Rucki²,

Krám

et al. 2013

Biologia

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A synoptic study of acidified mountain streams covering six Czech sites was performed. The aim was to provide biological data from small mountain streams in catchments with historically high acid atmospheric deposition, which have so far been subject of intensive long-term monitoring of hydrology and hydrochemistry only, in order to follow the development of the structure of benthic macroinvertebrates in the course of recovery from acidification. We focused on small headwater streams with minimum human influence in the catchment and relatively low concentrations of dissolved organic matter. The sites were classified according to their water pH status: three of them were strongly acidified (pH 4.07-4.57, concentration of reactive aluminium R-Al 448-1913 µg L −1 ), two were moderately acidified (pH 5.08-6.38, R-Al 52-261 µg L −1 ) and one non-acidified (pH 7.63-7.89, R-Al 12-59 µg L −1 ). The largest biotic difference detected by PCA was in the presence of the caddisflies Drusus, Rhyacophila, and Chaetopteryx villosa and stoneflies Leuctra pseudocingulata and Diura bicaudata. The results indicate that at the most acidified sites (the Lysina and the right branch of the Litavka), the process of biological recovery has not started yet due to an insufficient increase in stream pH. Indeed, MAGIC modelling published earlier shows that significant increases cannot be expected in the following decades. An average pH of at least 4.5 is needed for return of less acid-tolerant taxa such as Diura bicaudata, Leuctra major, L. pseudocingulata, L. pseudosignifera, Drusus or Rhyacophila. However, at the Sklářský potok -Jizerka site, both the clear-cut of mature spruce plantations in [1984][1985][1986][1987][1988][1989][1990] and the regional drop in SO2 emissions in the 1990s resulted in a decline of acid deposition and rising streamwater pH. Mean annual pH at the Sklářský potok -Jizerka outlet increased from 4.0 (1982-1985) to 5.3 (1990-1994), but episodic acidification has still resulted in a delay in recovery of the biota, particularly acid-sensitive species, which may be expected within a couple decades.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Differences in benthic macroinvertebrate structure of headwater streams with extreme hydrochemistry

Horecký

Rucki²,

Krám

et al. 2013

Biologia

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River Monitoring and Assessment Methods Based on Macroinvertebrates

Pauw

Gabriëls

Goethals

2006

Water Quality Measurements

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Small‐Scale Distribution of Aquatic Macroinvertebrates in Two Spring Fens with Different Groundwater Chemistry

Křoupalová

Bojková

Schenková

et al. 2011

International Review of Hydrobiology

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We examined responses of macroinvertebrate assemblages to environmental and temporal variations along spring source-spring brook transects in two fen habitats, sharply differing in groundwater chemistry, and compared the patterns among individual taxonomical groups. We hypothesised a different importance of environmental heterogeneity and seasonal changes primarily linked to strong tufa precipitation, which causes stronger environmental filtering in the calcareous fen. In concordance, we observed that assemblages of the more homogenous calcareous fen primarily changed over time, due to seasonal shifts in source availability and favourable conditions. Their spatial distribution was determined by the amount of CPOM, tufa crusts and temperature variation, but a substantial part of the assemblage exhibited spatial uniformity (Plecoptera, Clitellata, and especially Trichoptera and Diptera). The assemblages of the more heterogeneous Sphagnum-fen were primarily driven by water pH and substrate and the season was a notably weaker predictor. We found that different macroinvertebrate groups can display various responses to the measured variables shaping the overall pattern obtained based on the whole community. Further, greater environmental heterogeneity can result in temporally stable species distribution patterns even at very small spatial scales within a single site.

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Cited by 26 publications

References 6 publications

Differences in benthic macroinvertebrate structure of headwater streams with extreme hydrochemistry

Differences in benthic macroinvertebrate structure of headwater streams with extreme hydrochemistry

River Monitoring and Assessment Methods Based on Macroinvertebrates

Small‐Scale Distribution of Aquatic Macroinvertebrates in Two Spring Fens with Different Groundwater Chemistry

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