Vertical distribution of zoobenthos in an alpine brook of the RITRODAT-LUNZ study area

Bretschko, G.

doi:10.1080/03680770.1980.11897101

Cited by 28 publications

(35 citation statements)

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“…In this regard, the Ritrodat-Lunz project provided a substantial amount of interesting data (Bretschko, 1981;Bretschko & Leichtfried, 1988), revealing diverse and intense interactions between the hyporheic interstitial layer and stream ecosystem.…”

Section: Discussionmentioning

confidence: 99%

“…Traditionally, aquatic ecologists have perceived streams and rivers as bounded systems, consisting of riverbeds and overlying water; the exchanges of water, detritus, nutrients and organisms between groundwater and stream channels have only recently become a central element in freshwater ecology (e.g. Hynes, 1974;Bretschko, 1979Bretschko, , 1981Bretschko, , 1985Bretschko, , 1990Bretschko, , 1994Bretschko, , 1995Vallet et al, 1993). Orghidan (1959) considered the hyporheic zone as the sub-surface region of lotic systems that exchanges water with the surface.…”

Section: Introductionmentioning

confidence: 99%

“…However: (a) many studies have focused on the importance of downward movement towards the hyporheic/interstitial zone, especially in temporary streams (Delucchi, 1989) in which flow occurs either seasonally (intermittent streams) or in response to irregular rain (episodic streams) (Hose et al, 2005); (b) despite the great ecological importance of the sub-substratum zone, studies on ecological and functional aspects of interstitial areas have been performed only in recent years (Marmonier et al, 1992); (c) traditionally, most investigators have studied the meiofauna, while ecological aspects of the macrofauna in the interstitial zone have only been investigated in a few studies. The long-term RITRODAT-Lunz project was one of the most important efforts in this field (Bretschko, 1981).…”

Section: Introductionmentioning

confidence: 99%

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Colonisation patterns and vertical movements of stream invertebrates in the interstitial zone: a case study in the Apennines, NW Italy

Cucco

Fenoglio

et al. 2006

Hydrobiologia

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We examined vertical migration and colonisation patterns of stream macroinvertebrates within the substratum of an Apennine creek in NW Italy. Macrobenthos was sampled at three depths in the streambed (0-5, 5-10, 10-15 cm) by means of artificial baskets filled with natural substratum. We placed 42 traps (5Â5Â15 cm), i.e. 21 top-opened (T-traps) and 21 bottom-opened (B-traps), each composed of three overlapping baskets (high-H, medium-M and low-L), to evaluate differences in the vertical movements. We also collected Surber samples to compare interstitial assemblages with streambed communities. The multilevel traps yielded 42 taxa, compared with 60 taxa in the natural riverbed. Interstitial traps were rapidly colonised; both taxa richness and organism number increased during the 42-day study period. We found active migration in both vertical directions, but there were more invertebrates in the top-opened traps than in the bottom-opened traps. In the T-traps the most colonised baskets were those placed at the H level, while in the B-traps the L level baskets were more rapidly colonised. The interstitial assemblages differed markedly from the streambed communities in both composition and functional organisation, with more collector-gatherers and predators in the interstitial zone and more filterers and scrapers in the natural riverbed. In Apennine lotic systems, the interstitial zone is an important habitat for stream macrobenthos, although it may not be used by all species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Colonisation patterns and vertical movements of stream invertebrates in the interstitial zone: a case study in the Apennines, NW Italy

Cucco

Fenoglio

et al. 2006

Hydrobiologia

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“…Thus,compared to marine or lake surface sediments, where numerous studies on O2 profiles have showed that O2 concentrations become zero within less than 3 mm from the surface, the hyporheic sediment might be welloxygenated habitats even up to the depth of 80 cm (e.g. Bretschko 1981, Holmes et al 1994 . The extent of the oxygen gradient is determined by the interplay between flow path lengh, water velocity, the ratio of surface to ground water, and the amount and quality of organic matter.…”

Section: Introductionmentioning

confidence: 99%

Methanogenic System of a Small Lowland Stream Sitka, Czech Republic

Rulk¹,

Bednak²,

Mach³

et al. 2013

Biomass Now - Cultivation and Utilization

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“…The RITRODAT-LUNZ CONCEPT (BRETSCHKO, 1978 and1979) (Fig. 1) is a 25 year program in stream ecology with the main objectives of illuminating and understanding the structural and functional relationships in a low order (STRAHLER, 1957), forested mountain stream.…”

Section: Introductionmentioning

confidence: 99%

The Energy Basis of the Consumer Community in Streams Yesterday, Today and Tomorrow …

Leichtfried

2007

International Review of Hydrobiology

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Organic matter is the basic source of energy for consumers in ecosystems. In lotic ecosystems, most of the organic matter is allochthonous, imported as bank runoff or as aerial drift. Bank runoff is already processed soil material, particulate or dissolved. Unprocessed plant litter represents the aerial drift. The energy content of unprocessed organic matter is not readily available to consumers; it has to be processed by the microbial community. Microorganisms are most active in biofilms, comprised of fungi, bacteria, protozoa etc., and their organic excretions attached to surfaces. The colonizable surface area in sediments is negatively correlated with the grain size. Therefore, the largest amounts of organic matter are likely to occur in small grain size classes, which shows that biofilms are an important component of the organic matter pool. Most of the meiobenthic species, which play also a very important role in these processes, are closely connected to biofilms. These and their associated communities are doubtless an important food source for benthic consumers. The main energy pathway passes from organic matter (either particulate or dissolved) to the microbial community in biofilms, which transforms the organic matter and makes it available and palatable to benthic consumers. Wherever the benthic community is living, either in bed sediments or on macrophytic surfaces, the energy stored in biofilms or their associated communities is mostly used. IntroductionThe original aim of limnological research was to make processes predictable within water bodies. Empirical description of individual water systems should have brought limnology closer to this goal. A result of this first phase of limnological research was the realization that waterbodies are very complicated and interactive systems. Investigating the cycle of matter by tracking the relation between links, like chemical and physical variables, animals and plants, led to unforeseen difficulties. The focus on energy (i.e. viewing the energy flow through the system as interlinking parameter) facilitated this problem. The energy flow can be measured only indirectly but leads, however, to substantially clearer and simpler interpretations (BERRIE, 1976;BRETSCHKO, 1978).This keynote address for the session "The Energy Basis of the Consumer Community" (RIVER BOTTOM VI Meeting in Brno 2005) is dedicated to GERNOT BRETSCHKO, the marvellous Austrian limnologist, thinker and best friend. In the seventies, he brought the limnology of lotic ecosystems to the Biological Station Lunz (one of the cradles of limnology, founded in 1906). With his RITRODAT-LUNZ CONCEPT, he gave the Biological Station Lunz a new sense of existence. GERNOT BRETSCHKO passed by far too early in 2002, in the last phase of the 25 years research on stream ecology in the framework of RITRODAT-LUNZ. Therefore, it was not possible for him to complete the work of 25 years´ research on streams through a published compilation about RITRODAT-LUNZ. Internat. Rev. Hydrobiol. 92 2007 4-5 363-377...

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Vertical distribution of zoobenthos in an alpine brook of the RITRODAT-LUNZ study area

Cited by 28 publications

References 6 publications

Colonisation patterns and vertical movements of stream invertebrates in the interstitial zone: a case study in the Apennines, NW Italy

Colonisation patterns and vertical movements of stream invertebrates in the interstitial zone: a case study in the Apennines, NW Italy

Methanogenic System of a Small Lowland Stream Sitka, Czech Republic

The Energy Basis of the Consumer Community in Streams Yesterday, Today and Tomorrow …

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