Ecological characteristics of lake outlets in Alpine environments of the Swiss Alps

Donath, Ulrich; Robinson, Christopher T.

doi:10.1127/archiv-hydrobiol/150/2001/207

Cited by 17 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The authors showed that high density and quality of food items as well as high DOC concentrations directly in the outlet, combined with favourable water temperatures, usually sustain high densities of Spongillidae, Bryozoa, Simuliidae and net-spinning Trichoptera. This specialisation of the community often results in low faunal richness, especially in temporary lake outlets (DONATH and ROBINSON, 2001), where Hydropsyche species often dominate both in diversity and abundance (LOMOND and COLBO, 2000). With increasing distance from the outlet, the density of filter feeders quickly decreases in a quadratic rather than a linear pattern (ERIKSSON, 2001).…”

Section: Discussionmentioning

confidence: 98%

Light‐Trapping of Caddisflies at the Thaya (Lower Austria), a River Influenced by Pulsating Hypolimnetic Water Release

Waringer¹

2003

International Review of Hydrobiology

View full text Add to dashboard Cite

Adult Trichoptera were caught from September 1999 to September 2000 at the Thaya River at Hardegg, Lower Austria, using a Jermy-type light trap. From a total of 11,711 specimens caught, the most abundant species were Psychomyia pusilla (FABRICIUS), Lepidostoma hirtum (FABRICIUS), Lasiocephala basalis (KOLENATI), Agapetus ochripes CURTIS and Sericostoma flavicorne SCHNEIDER. In nine out of the eleven most abundant species the sex ratios significantly differed from 1 :1, with an excess of females. Of the meteorological parameters tested, only the effect of air temperature was significant. An upstream shift of faunal zonation patterns from epipotamon to meta-and hyporhithron could be detected at the station which is influenced by hypolimnetic water release.

show abstract

Section: Discussionmentioning

confidence: 98%

Light‐Trapping of Caddisflies at the Thaya (Lower Austria), a River Influenced by Pulsating Hypolimnetic Water Release

Waringer¹

2003

International Review of Hydrobiology

View full text Add to dashboard Cite

show abstract

“…The few studies on alpine lake outlets reported invertebrate assemblages to be similar to those of other alpine streams (Kownacki et al. , 1997; Burgherr & Ward, 2000; Donath & Robinson, 2001). In contrast, lake outlets below treeline typically have a distinct macroinvertebrate community dominated by filter‐feeding invertebrates, presumably resulting from high concentrations of transported organic material and more stable flow and temperature regimes (Illies, 1956; Carlsson et al.…”

Section: Introductionmentioning

confidence: 88%

A comparison of benthic macroinvertebrate assemblages among different types of alpine streams

Hieber¹,

Robinson

Uehlinger

et al. 2005

Freshwater Biology

Self Cite

View full text Add to dashboard Cite

1. Benthic macroinvertebrate assemblages were compared among a diverse array of firstorder alpine tundra streams of the Swiss Alps. 2. A principal components analysis separated sites into three main groups: rhithral streams, rhithral lake outlets, and kryal sites including outlets and streams. Rhithral streams contained the most diverse and taxon rich assemblages, being colonised by both non-insect taxa and Ephemeroptera, Plecoptera, Trichoptera and Diptera. 3. Rhithral lake outlets supported high densities of non-insect taxa such as Oligochaeta, Nemathelminthes and crustaceans. Despite low taxon richness, kryal sites had high Ephemeroptera and Plecoptera abundances. Chironomidae were most common at all sites. 4. Collector-gatherers were dominant at all sites, whereas filter-feeders were rare. Scrapers and shredders were more common in streams than lake outlets. 5. Water temperature and algal standing crops were higher at rhithral lake outlets than rhithral streams, perhaps providing more favourable habitat for non-insect taxa. Glacial runoff was the dominant factor influencing macroinvertebrate assemblages of kryal streams and kryal lake outlets. Alpine lakes influenced the environmental conditions of their outlets and, consequently, their macroinvertebrate assemblages unless being constrained by a glacial influence.

show abstract

“…Two measured aliquots of the periphyton slurry from each rock were filtered (Whatman GF/F filters). One filter was used for determination of AFDM and the other for chlorophyll a with values expressed per unit stone area (Uehlinger, 1991;Donath and Robinson, 2001).…”

Section: Field Protocolsmentioning

confidence: 99%

Longitudinal effects of experimental floods on stream benthos downstream from a large dam

Jakob

Robinson

Uehlinger

2003

Aquatic Sciences - Research Across Boundaries

Self Cite

View full text Add to dashboard Cite

Abstract.We examined the longitudinal effects of 3 experimental floods on seston, periphyton, and macroinvertebrates in a regulated river downstream from a large reservoir in the Swiss Alps. In addition, suspended organic sediments, in conjunction with conductivity and turbidity, were measured during each flood. Three study reaches were selected downstream from the reservoir: an Upper site ca 150 m, a Middle site at 1.2 km, and a Lower site at 2.3 km from the dam. The Upper site was located upstream of any significant source of sediments. No flood effect was observed on water temperature, although river temperatures and diel amplitudes increased progressively downstream from the dam. Most organic sediments were mobilized and transported within the first few hours of each flood, with the pulse in sediments typically occuring later (after peak discharge) and being more prolonged at the Lower site. Turbidity generally decreased Aquat. Sci. 65 (2003) Dübendorf, 2003 Aquatic Sciences during the flood season, perhaps in response to lower amounts of fines and reductions in periphyton biomass. Seston concentrations (as chlorophyll a and AFDM) were lowest at the Upper site, and typically decreased following each flood. The flood response in seston was lowest at the Upper site and more pronounced at the Middle and Lower sites. Periphyton biomass also was lowest at the Upper site, and the flood effects were significant only in the Middle and Lower sites. In contrast, macroinvertebrate densities were similar between the Upper and Lower sites, and both sites exhibited a similar response to the floods. These results indicate a longitudinal response of river benthos to flooding below the reservoir that partly reflects the examined benthic constituent (periphyton or zoobenthos) and the longitudinal differences in the degree and type (e. g., flow in combination with sediment mobility and scouring) of disturbance.223 -231 1015-1621/03/030223-09 DOI 10.1007/s00027-003-0662-9 © EAWAG,

show abstract

Ecological characteristics of lake outlets in Alpine environments of the Swiss Alps

Cited by 17 publications

References 0 publications

Light‐Trapping of Caddisflies at the Thaya (Lower Austria), a River Influenced by Pulsating Hypolimnetic Water Release

Light‐Trapping of Caddisflies at the Thaya (Lower Austria), a River Influenced by Pulsating Hypolimnetic Water Release

A comparison of benthic macroinvertebrate assemblages among different types of alpine streams

Longitudinal effects of experimental floods on stream benthos downstream from a large dam

Contact Info

Product

Resources

About