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- Traunspurger, W, et al.
(author)
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The effects of nematodes on bacterial activity and abundance in a freshwater sediment
- 1997
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In: OECOLOGIA. - : SPRINGER VERLAG. - 0029-8549. ; 112:1, s. 118-122
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Journal article (other academic/artistic)abstract
- The effects of natural nematode communities on bacterial activity and abundance were investigated in a microcosm study. Nematodes were added at different densities to a freshwater sediment and bacterial parameters were measured after 1, 5, 9, and 17 days.
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| 2. |
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| 3. |
- Bergfur, J., et al.
(author)
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Effects of nutrient enrichment on boreal streams : Invertebrates, fungi and leaf-litter breakdown
- 2007
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In: Freshwater Biology. - : Wiley. - 0046-5070 .- 1365-2427. ; 52:8, s. 1618-1633
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Journal article (peer-reviewed)abstract
- Summary 1. The effect of nutrient enrichment on structural (invertebrate indices) and functional (leaf-litter breakdown rates) characteristics of stream integrity was studied in nine boreal streams.2. The results showed predicted changes in biotic indices and leaf-litter breakdown along a complex (principal component) nutrient gradient. Biotic indices were better correlated with nutrient effects than leaf-litter breakdown.3. Fungal biomass and invertebrate densities in the litter bags were positively correlated with leaf-litter breakdown, and both were also positively related to the nutrient gradient.4. Invertebrate community composition influenced breakdown rate. High breakdown rates at one site were associated with the high abundance of the detritivore Asellus aquaticus. 5. This study lends support to the importance of invertebrate and fungi as mediators of leaf-litter decomposition. However, our study also shows that study design (length of incubation) can confound the interpretation of nutrient-induced effects on decomposition.
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| 5. |
- Corrado, D., et al.
(author)
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Cardiovascular pre-participation screening of young competitive athletes for prevention of sudden death: proposal for a common European protocol. Consensus Statement of the Study Group of Sport Cardiology of the Working Group of Cardiac Rehabilitation and Exercise Physiology and the Working Group of Myocardial and Pericardial Diseases of the European Society of Cardiology
- 2005
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In: Eur Heart J. ; 26:5, s. 516-24
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Journal article (peer-reviewed)abstract
- The 1996 American Heart Association consensus panel recommendations stated that pre-participation cardiovascular screening for young competitive athletes is justifiable and compelling on ethical, legal, and medical grounds. The present article represents the consensus statement of the Study Group on Sports Cardiology of the Working Group on Cardiac Rehabilitation and Exercise Physiology and the Working Group on Myocardial and Pericardial diseases of the European Society of Cardiology, which comprises cardiovascular specialists and other physicians from different European countries with extensive clinical experience with young competitive athletes, as well as with pathological substrates of sudden death. The document takes note of the 25-year Italian experience on systematic pre-participation screening of competitive athletes and focuses on relevant issues, mostly regarding the relative risk, causes, and prevalence of sudden death in athletes; the efficacy, feasibility, and cost-effectiveness of population-based pre-participation cardiovascular screening; the key role of 12-lead ECG for identification of cardiovascular diseases such as cardiomyopathies and channelopathies at risk of sudden death during sports; and the potential of preventing fatal events. The main purpose of the consensus document is to reinforce the principle of the need for pre-participation medical clearance of all young athletes involved in organized sports programmes, on the basis of (i) the proven efficacy of systematic screening by 12-lead ECG (in addition to history and physical examination) to identify hypertrophic cardiomyopathy-the leading cause of sports-related sudden death-and to prevent athletic field fatalities; (ii) the potential screening ability in detecting other lethal cardiovascular diseases presenting with ECG abnormalities. The consensus document recommends the implementation of a common European screening protocol essentially based on 12-lead ECG.
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| 6. |
- GOEDKOOP, W, et al.
(author)
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EXPLOITATION OF SEDIMENT BACTERIAL CARBON BY JUVENILES OF THE AMPHIPOD MONOPOREIA-AFFINIS
- 1994
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In: FRESHWATER BIOLOGY. - : BLACKWELL SCIENCE LTD. - 0046-5070. ; 32:3, s. 553-563
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Journal article (other academic/artistic)abstract
- 1. Carbon budget parameters were measured for young-of-the-year Monoporeia affinis in a combined field and laboratory (microcosm) study, designed to quantify the role of sediment bacteria as a carbon source for juvenile amphipods. Special emphasis was pla
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| 7. |
- Goedkoop, W., et al.
(author)
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Interactions between food quantity and quality (long-chain polyunsaturated fatty acid concentrations) effects on growth and development of Chironomus riparius
- 2007
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In: Canadian Journal of Fisheries and Aquatic Sciences. - 0706-652X .- 1205-7533. ; 64:3, s. 425-436
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Journal article (peer-reviewed)abstract
- We quantified somatic growth, development, and emergence of the midge Chironomus riparius on experimental diets (oats, Spirulina, and Tetraphyll (R)) covering gradients in food quality (differing polyunsaturated fatty acids) and quantity (0.1-5.4 mg C center dot day(-1)). Additionally, similar incubations without food additions were made using a food-poor sediment containing peat and the green alga Scenedesmus obliquus. Larval and adult size was affected by both food quantity and quality and increased some three to four times across the food concentration gradients. Adult emergence, however, was affected only by food quantity. A type 3 response model showed that a saturation level was reached for the oats treatment at 2.7 mg C center dot day(-1) (or 3.9 mu g omega 3 and 120 mu g omega 6 polyunsaturated fatty acids center dot day(-1)), indicating that the quality of oats constrained further stimulation of larval growth. In the peat treatment, larval growth was very low, no adults emerged, and no larvae even made it to the pupa stage. Fatty acid analyses showed that larvae were capable of synthesizing arachidonic acid via gamma-linolenic acid by Delta 6- and Delta 5-desaturase activity using linoleic acid available in food sources. This strongly suggests that C. riparius is not dependent on dietary sources of eicosapentaenoic acid and arachidonic acid and can sustain viable populations even under a low-quality food regimen.
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| 10. |
- Gullberg, KR, et al.
(author)
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The fate of diatom carbon within a freshwater benthic community - a microcosm study
- 1997
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In: LIMNOLOGY AND OCEANOGRAPHY. - : AMER SOC LIMNOLOGY OCEANOGRAPHY. - 0024-3590. ; 42:3, s. 452-460
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Journal article (peer-reviewed)abstract
- Partitioning of C-14 from labeled diatoms (Strephanodiscus hantzschii Grun v. pusillus) within a freshwater benthic community was determined in a microcosm study for three different treatments: sediment with only natural, ambient meio- and microfauna, and
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| 11. |
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