| 1. |
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| 2. |
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| 3. |
- Parmesan, C, et al.
(author)
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Poleward shifts in geographical ranges of butterfly species associated with regional warming
- 1999
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In: NATURE. - : MACMILLAN MAGAZINES LTD. - 0028-0836. ; 399:6736, s. 579-583
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Journal article (other academic/artistic)abstract
- Mean global temperatures have risen this century, and further warming is predicted to continue for the next 50-100 years(1-3) Some migratory species can respond rapidly to yearly climate variation by altering the timing or destination of migration(4), but
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| 4. |
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| 5. |
- Amato, Clara, et al.
(author)
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Newly Graduated Nurses' Learning Work Climate, Health, Resilience, and Burnout Symptoms
- 2020
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In: 32nd Association for Psychological Science Annual Convention. Chicago, Illinois, USA.
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Conference paper (other academic/artistic)abstract
- The results provide an indication of important learning work climate factors associated to newly graduated nurses’ health, ability to cope successfully in adverse circumstances (i.e., resilience), and burnout symptoms. It is, however, plausible that there is an interconnection between personal vulnerability, learning climate, and health (Stoyanov & Cloninger, 2011).
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| 6. |
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| 7. |
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| 8. |
- Boone, Sebastiaan C., et al.
(author)
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Evaluation of the Value of Waist Circumference and Metabolomics in the Estimation of Visceral Adipose Tissue
- 2022
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In: American Journal of Epidemiology. - : Oxford University Press (OUP). - 0002-9262 .- 1476-6256. ; 191:5, s. 886-899
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Journal article (peer-reviewed)abstract
- Visceral adipose tissue (VAT) is a strong prognostic factor for cardiovascular disease and a potential target for cardiovascular risk stratification. Because VAT is difficult to measure in clinical practice, we estimated prediction models with predictors routinely measured in general practice and VAT as outcome using ridge regression in 2,501 middle-aged participants from the Netherlands Epidemiology of Obesity study, 2008-2012. Adding waist circumference and other anthropometric measurements on top of the routinely measured variables improved the optimism-adjusted R-2 from 0.50 to 0.58 with a decrease in the root-mean-square error (RMSE) from 45.6 to 41.5 cm(2) and with overall good calibration. Further addition of predominantly lipoprotein-related metabolites from the Nightingale platform did not improve the optimism-corrected R-2 and RMSE. The models were externally validated in 370 participants from the Prospective Investigation of Vasculature in Uppsala Seniors (PIVUS, 2006-2009) and 1,901 participants from the Multi-Ethnic Study of Atherosclerosis (MESA, 2000-2007). Performance was comparable to the development setting in PIVUS (R-2 = 0.63, RMSE = 42.4 cm(2), calibration slope = 0.94) but lower in MESA (R-2 = 0.44, RMSE = 60.7 cm(2), calibration slope = 0.75). Our findings indicate that the estimation of VAT with routine clinical measurements can be substantially improved by incorporating waist circumference but not by metabolite measurements.
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| 9. |
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| 10. |
- Chu, Audrey Y, et al.
(author)
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Multiethnic genome-wide meta-analysis of ectopic fat depots identifies loci associated with adipocyte development and differentiation
- 2017
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In: Nature Genetics. - : Springer Science and Business Media LLC. - 1061-4036 .- 1546-1718. ; 49:1, s. 125-130
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Journal article (peer-reviewed)abstract
- Variation in body fat distribution contributes to the metabolic sequelae of obesity. The genetic determinants of body fat distribution are poorly understood. The goal of this study was to gain new insights into the underlying genetics of body fat distribution by conducting sample-size-weighted fixed-effects genome-wide association meta-analyses in up to 9,594 women and 8,738 men of European, African, Hispanic and Chinese ancestry, with and without sex stratification, for six traits associated with ectopic fat (hereinafter referred to as ectopic-fat traits). In total, we identified seven new loci associated with ectopic-fat traits (ATXN1, UBE2E2, EBF1, RREB1, GSDMB, GRAMD3 and ENSA; P < 5 × 10(-8); false discovery rate < 1%). Functional analysis of these genes showed that loss of function of either Atxn1 or Ube2e2 in primary mouse adipose progenitor cells impaired adipocyte differentiation, suggesting physiological roles for ATXN1 and UBE2E2 in adipogenesis. Future studies are necessary to further explore the mechanisms by which these genes affect adipocyte biology and how their perturbations contribute to systemic metabolic disease.
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| 11. |
- Cloninger, Kevin M., et al.
(author)
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The Prevalence of Personality (Temperament and Character) Profiles among Swedish Newly Graduated Nurses
- 2020
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In: 32nd Association for Psychological Science Annual Convention. Chicago, Illinois, USA.
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Conference paper (other academic/artistic)abstract
- Personal vulnerability (i.e., specific personality profiles) is a major factor for burnout among helping professionals. Compared to the general population, 80% of Swedish newly graduated nurses reported high Reward Dependence (i.e., being sentimental, warm, attached, and dependent) and 95% reported low Self-Directedness (i.e., being blaming, aimless, helpless, defensive, and unfulfilled).
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| 12. |
- Dehara, Marina, et al.
(author)
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Menopausal hormone therapy and risk of sarcoidosis : a population-based nested case–control study in Sweden
- 2024
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In: European Journal of Epidemiology. - : Springer Nature. - 0393-2990 .- 1573-7284. ; 39:3, s. 313-322
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Journal article (peer-reviewed)abstract
- Sarcoidosis incidence peaks in women between 50 and 60 years old, which coincides with menopause, suggesting that certain sex hormones, mainly estrogen, may play a role in disease development. We investigated whether menopausal hormone therapy (MHT) was associated with sarcoidosis risk in women and whether the risk varied by treatment type. We performed a nested case–control study (2007–2020) including incident sarcoidosis cases from the Swedish National Patient Register (n = 2593) and matched (1:10) to general population controls (n = 20,003) on birth year, county, and living in Sweden at the time of sarcoidosis diagnosis. Dispensations of MHT were obtained from the Swedish Prescribed Drug Register before sarcoidosis diagnosis/matching. Adjusted odds ratios (aOR) of sarcoidosis were estimated using conditional logistic regression. Ever MHT use was associated with a 25% higher risk of sarcoidosis compared with never use (aOR 1.25, 95% CI 1.13–1.38). When MHT type and route of administration were considered together, systemic estrogen was associated with the highest risk of sarcoidosis (aOR 1.51, 95% CI 1.23–1.85), followed by local estrogen (aOR 1.25, 95% CI 1.11–1.42), while systemic estrogen-progestogen combined was associated with the lowest risk compared to never users (aOR 1.12, 95% CI 0.96–1.31). The aOR of sarcoidosis did not differ greatly by duration of MHT use. Our findings suggest that a history of MHT use is associated with increased risk of sarcoidosis, with women receiving estrogen administered systemically having the highest risk.
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| 13. |
- Dehara, Marina, et al.
(author)
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Reproductive and hormonal risk factors for sarcoidosis : a nested case–control study
- 2022
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In: BMC Pulmonary Medicine. - : BMC. - 1471-2466. ; 22:1
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Journal article (peer-reviewed)abstract
- Background: Sarcoidosis incidence peaks in females around the fifth decade of life, which coincides with menopause, suggesting hormonal factors play a role in disease development. We investigated whether longer exposure to reproductive and hormonal factors is associated with reduced sarcoidosis risk. Methods: We conducted a matched case–control study nested within the Mammography Screening Project. Incident sarcoidosis cases were identified via medical records and matched to controls on birth and questionnaire date (1:4). Information on hormonal factors was obtained through questionnaires prior to sarcoidosis diagnosis. Multilevel modelling was used to estimate adjusted odds ratios with 95% credible intervals (OR; 95% CI). Results: In total, 32 sarcoidosis cases and 124 controls were included. Higher sarcoidosis odds were associated with older age at menarche (OR 1.19: 95% CI 0.92–1.55), natural menopause versus non-natural (OR 1.53: 95% CI 0.80–2.93), later age at first pregnancy (OR 1.11: 95% CI 0.76–1.63) and ever hormone replacement therapy (HRT) use (OR 1.40: 95% CI 0.76–2.59). Lower odds were associated with older age at menopause (OR 0.90: 95% CI 0.52–1.55), longer duration of oral contraceptive use (OR 0.70: 95% CI 0.45–1.07), longer duration of HRT use (OR 0.61: 95% CI 0.22–1.70), ever local estrogen therapy (LET) use (OR 0.83: 95% CI 0.34–2.04) and longer duration of LET use (OR 0.78: 95% CI 0.21–2.81). However, the CIs could not rule out null associations. Conclusion: Given the inconsistency and modest magnitude in our estimates, and that the 95% credible intervals included one, it still remains unclear whether longer estrogen exposure is associated with reduced sarcoidosis risk.
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| 14. |
- Elwing, B, et al.
(author)
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A comparative study of food intake between Lithuanian and Swedish middle-aged men : The LiVicordia study
- 2001
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In: Scandinavian Journal of Nutrition/Næringsforskning. - 1102-6480 .- 1651-2359. ; 45:3, s. 126-130
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Journal article (pop. science, debate, etc.)abstract
- Background: In 1994, the mortality in coronary heart disease was four times higher among Lithuanian middle-aged men than among Swedish men. Over the period 1993-1995, the LiVicordia study investigated possible causes for this difference. We have earlier reported lower serum levels of cholesterol and higher susceptibility of low-density lipoprotein cholesterol for oxidation among Lithuanian men. Objective: In this part of the study, the aim was to compare mean estimates of food intake. Design: Cross-sectional study of random samples of 50-year-old men from each of the cities of Link÷ping, Sweden and Vilnius, Lithuania (n=150). The volunteers were interviewed about their food intake with the 24-hour recall method. Results: We found no differences in total energy intake, but Vilnius men had a higher energy intake from fat. Vilnius men consumed more fat from meat and less vegetable fat, while fat intake from dairy products was almost the same. Also, Vilnius men had a higher intake of vegetables, while Link÷ping men had a higher intake of fruit and berries. Conclusion: The observed differences in food consumption and dietary composition are partly consistent with the higher CHD mortality among Lithuanian men. However, data on biomarkers indicate that other dietary and lifestyle factors play a role.
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| 15. |
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| 16. |
- Garcia, Danilo, 1973, et al.
(author)
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A Pilot Study on Newly Graduated Nurses' Personal Vulnerability for Burnout
- 2019
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In: 31st Association for Psychological Science Annual Convention. Washington, D.C., USA.
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Conference paper (other academic/artistic)abstract
- Nurses’ work is characterized by overload and hard decisions. Despite 80% of new ly graduated nurses being socially warm and dedicated, 72.97% lacked purpose and meaning and felt ineffective and disconnected from the rest of the world. Moreover, 51.70% had a personality profile with high risk for burnout and ill-being.
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| 17. |
- Gifford, Aliya, et al.
(author)
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Canine body composition quantification using 3 tesla fat–water MRI
- 2014
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In: Journal of Magnetic Resonance Imaging. - : Wiley. - 1053-1807 .- 1522-2586. ; 39:2, s. 485-491
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Journal article (peer-reviewed)abstract
- PurposeTo test the hypothesis that a whole-body fat–water MRI (FWMRI) protocol acquired at 3 Tesla combined with semi-automated image analysis techniques enables precise volume and mass quantification of adipose, lean, and bone tissue depots that agree with static scale mass and scale mass changes in the context of a longitudinal study of large-breed dogs placed on an obesogenic high-fat, high-fructose diet.Materials and MethodsSix healthy adult male dogs were scanned twice, at weeks 0 (baseline) and 4, of the dietary regiment. FWMRI-derived volumes of adipose tissue (total, visceral, and subcutaneous), lean tissue, and cortical bone were quantified using a semi-automated approach. Volumes were converted to masses using published tissue densities.ResultsFWMRI-derived total mass corresponds with scale mass with a concordance correlation coefficient of 0.931 (95% confidence interval = [0.813, 0.975]), and slope and intercept values of 1.12 and −2.23 kg, respectively. Visceral, subcutaneous and total adipose tissue masses increased significantly from weeks 0 to 4, while neither cortical bone nor lean tissue masses changed significantly. This is evidenced by a mean percent change of 70.2% for visceral, 67.0% for subcutaneous, and 67.1% for total adipose tissue.ConclusionFWMRI can precisely quantify and map body composition with respect to adipose, lean, and bone tissue depots. The described approach provides a valuable tool to examine the role of distinct tissue depots in an established animal model of human metabolic disease.
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| 18. |
- Guglielmo, Priscilla, et al.
(author)
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Validation of automated whole-body analysis of metabolic and morphological parameters from an integrated FDG-PET/MRI acquisition
- 2020
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In: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 10:1
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Journal article (peer-reviewed)abstract
- Automated quantification of tissue morphology and tracer uptake in PET/MR images could streamline the analysis compared to traditional manual methods. To validate a single atlas image segmentation approach for automated assessment of tissue volume, fat content (FF) and glucose uptake (GU) from whole-body [18F]FDG-PET/MR images. Twelve subjects underwent whole-body [18F]FDG-PET/MRI during hyperinsulinemic-euglycemic clamp. Automated analysis of tissue volumes, FF and GU were achieved using image registration to a single atlas image with reference segmentations of 18 volume of interests (VOIs). Manual segmentations by an experienced radiologist were used as reference. Quantification accuracy was assessed with Dice scores, group comparisons and correlations. VOI Dice scores ranged from 0.93 to 0.32. Muscles, brain, VAT and liver showed the highest scores. Pancreas, large and small intestines demonstrated lower segmentation accuracy and poor correlations. Estimated tissue volumes differed significantly in 8 cases. Tissue FFs were often slightly but significantly overestimated. Satisfactory agreements were observed in most tissue GUs. Automated tissue identification and characterization using a single atlas segmentation performs well compared to manual segmentation in most tissues and will be valuable in future studies. In certain tissues, alternative quantification methods or improvements to the current approach is needed.
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| 19. |
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| 20. |
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| 21. |
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| 22. |
- Kullberg, C, et al.
(author)
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Does predation maintain tit community diversity?
- 2000
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In: OIKOS. - : MUNKSGAARD INT PUBL LTD. - 0030-1299. ; 89:1, s. 41-45
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Journal article (peer-reviewed)abstract
- European tits of the genus Parus constitute a complex group of coexisting boreal birds. Here we present a survey of the distribution of three coniferous-living Pants species and one of their main predators, the pygmy owl (Glaucidium passerinum), on nine i
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| 23. |
- Kullberg, C, et al.
(author)
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Prevalence of retinopathy differs with age at onset of diabetes in a population of patients with Type 1 diabetes
- 2002
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In: Diabetic Medicine. - : Wiley. - 0742-3071 .- 1464-5491. ; 19:11, s. 924-931
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Journal article (peer-reviewed)abstract
- Aim. The VISS study (Vascular complications in South-east Sweden) investigates prevalence and incidence of vascular complications in a population with Type 1 diabetes, from a well-defined geographical area and followed from diag-nosis with HbA1c measurement. Method. The study population comprised all 440 patients with Type 1 diabetes onset before the age of 36 years, onset during 1983-1987, and at the time of onset living within the counties of J÷nk÷ping, Kalmar or ╓sterg÷tland. Retinopathy was examined with fundus photography 1994-1995, and classified according to a modified Airlie House protocol. Results. Fundus photographs from 390 patients were evaluated. In 277 (71%) patients no retinopathy was seen. The prevalence of retinopathy increased from 11% among patients < 5 years old at diabetes onset, to 48% among those 15-19 years old at diabetes onset, and then decreased to 30% for patients 30-35 years old at diabetes onset (P for ?2 for linear trend for all ages 0.017, for age at onset 0-19 yearsP = 0.0003), without corresponding differences in duration or HbA1c between patients with different onset age. Patients with HbA1c in the highest quartile (> 8.3% HbA1c) had a relative risk of 2.4 (95% confidence) interval (CI) 1.7-3.2) of having any retinopathy compared with patients with lower HbA1c, and a relative risk of 7.1 (95% CI 3.0-16.7) of having other forms of retinopathy than microaneurysms. Conclusion. In patients with diabetes duration of 6-13 years, the prevalence of retinopathy is clearly related to glycaemic control. Furthermore, the risk of retinopathy varies with different age at onset, independently of differences in duration or glycaemic control.
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| 24. |
- Kullberg, C., et al.
(author)
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Social-Behavior and Cooperative Breeding in Arctic Foxes, Alopex-Lagopus (L), in a Seminatural Environment
- 1992
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In: Ethology. ; 90:4, s. 321-335
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Journal article (peer-reviewed)abstract
- Most canid species show cooperative breeding at least occasionally, The helper-at-the-den system, when extra adults serve as helpers by feeding and guarding the cubs of an alpha pair, has been observed but not studied in any detail in wild Arctic foxes (Alopex lagopus). During a 3-months study of arctic foxes in two enclosures of 4 ha each, we measured the social behaviour during the reproductive season. Older foxes dominated younger ones and males dominated females of the same age. A litter with one surviving cub was born in one enclosure. The alpha male increased his rate of urine marking and barking and fed the alpha female both before and after the birth of the litter. However, about 10 days after the birth, the alpha female died. The cub was fed by his putative father, his sister and his brother (both one year old). The one year old female increased her rate of territorial defence, measured as urine marking and barking, when the mother died. The subordinate females were probably suppressed from breeding by the high aggression levels and territorial defence of the dominant females in each enclosure. The dominant female in the second enclosure came into beat after the death of the alpha female (her mother) in the first enclosure. These changes in behaviour can probably be explained by sexual inhibition by the alpha female while she was present. The significance of territorial defence and dominance, inbreeding avoidance, sexual suppression and evolution of helping behaviour are discussed.
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| 25. |
- Latva-Rasku, Aino, et al.
(author)
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The SGLT2 Inhibitor Dapagliflozin Reduces Liver Fat but Does Not Affect Tissue Insulin Sensitivity : A Randomized, Double-Blind, Placebo-Controlled Study With 8-Week Treatment in Type 2 Diabetes Patients.
- 2019
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In: Diabetes Care. - : American Diabetes Association. - 0149-5992 .- 1935-5548. ; 42:5, s. 931-937
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Journal article (peer-reviewed)abstract
- OBJECTIVE: The aim of this study was to investigate tissue-specific effects of dapagliflozin on insulin sensitivity and liver and body fat in patients with type 2 diabetes.RESEARCH DESIGN AND METHODS: This randomized, double-blind, parallel group, placebo-controlled study recruited 32 patients with type 2 diabetes. Enrolled patients were to have HbA1c 6.5-10.5% (48-91 mmol/mol) and ≥3 months of stable treatment with metformin, dipeptidyl peptidase 4 inhibitor, or their combination. Patients were randomized 1:1 to receive 10 mg dapagliflozin or placebo daily for 8 weeks. Before and after the intervention, tissue insulin sensitivity was measured using [18F]-fluorodeoxyglucose and positron emission tomography during hyperinsulinemic-euglycemic clamp. Liver proton density fat fraction (PDFF) and adipose tissue volumes were assessed using MRI, and blood biomarkers were analyzed.RESULTS: After 8 weeks, glycemic control was improved by dapagliflozin (placebo-corrected change in HbA1c -0.39%, P < 0.01), but whole-body glucose uptake was not increased (P = 0.90). Tissue-specific insulin-stimulated glucose uptake did not change in skeletal muscle, liver, myocardium, or white and brown adipose tissue, and endogenous glucose production remained unaffected. However, there were significant placebo-corrected decreases in liver PDFF (-3.74%, P < 0.01), liver volume (-0.10 L, P < 0.05), visceral adipose tissue volume (-0.35 L, P < 0.01), interleukin-6 (-1.87 pg/mL, P < 0.05), and N-terminal prohormone of brain natriuretic peptide (-96 ng/L, P = 0.03).CONCLUSIONS: In this study, 8 weeks of treatment with dapagliflozin reduced liver PDFF and the volume of visceral adipose tissue in obese patients with type 2 diabetes. Although glycemic control was improved, no effect on tissue-level insulin sensitivity was observed.
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| 26. |
- Mihailovic, Marko, et al.
(author)
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The Prevalence of Resilience Profiles (Harm Avoidance, Persistence, and Self-directedness) among Swedish Newly Graduated Nurses
- 2020
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In: 32nd Association for Psychological Science Annual Convention. Chicago, Illinois, USA.
-
Conference paper (other academic/artistic)abstract
- About 26% of the Swedish population has a resilient personality profile: low Harm Avoidance (i.e., relaxed, confident, and optimistic), high Persistence (i.e., industrious, perseverant, and hard-working), and high Self-Directedness (i.e., responsible, reliable, self-acceptant, goal-oriented, and resourceful). However, only 4.70% of newly graduated nurses had this specific personality profile.
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| 27. |
- Rivera, NV, et al.
(author)
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A Gene-Environment Interaction Between Smoking and Gene polymorphisms Provides a High Risk of Two Subgroups of Sarcoidosis
- 2019
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In: Scientific reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 9:1, s. 18633-
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Journal article (peer-reviewed)abstract
- The influence and effect of cigarette smoking in sarcoidosis is unclear. Here, we evaluated gene-environment interaction between multiple genetic variants including HLA genes and smoking in sarcoidosis defined by two clinical phenotypes, Löfgren’s syndrome (LS) and patients without Löfgren’s syndrome (non-LS). To quantify smoking effects in sarcoidosis, we performed a gene-environment interaction study in a Swedish population-based case-control study consisting of 3,713 individuals. Cases and controls were classified according to their cigarette smoking status and genotypes by Immunochip platform. Gene-smoking interactions were quantified by an additive interaction model using a logistic regression adjusted by sex, age and first two principal components. The estimated attributable proportion (AP) was used to quantify the interaction effect. Assessment of smoking effects with inclusion of genetic information revealed 53 (in LS) and 34 (in non-LS) SNP-smoking additive interactions at false discovery rate (FDR) below 5%. The lead signals interacting with smoking were rs12132140 (AP = 0.56, 95% CI = 0.22–0.90), p = 1.28e-03) in FCRL1 for LS and rs61780312 (AP = 0.62, 95% CI = 0.28–0.90), p = 3e-04) in IL23R for non-LS. We further identified 16 genomic loci (in LS) and 13 (in non-LS) that interact with cigarette smoking. These findings suggest that sarcoidosis risk is modulated by smoking due to genetic susceptibility. Therefore, patients having certain gene variants, are at a higher risk for the disease. Consideration of individual’s genetic predisposition is crucial to quantify effects of smoking in sarcoidosis.
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| 28. |
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| 29. |
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| 30. |
- Vought, Lena B. M., et al.
(author)
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Effect of riparian structure, temperature and channel morphometry on detritus processing in channelized and natural woodland streams in southern Sweden
- 1998
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In: Aquatic conservation. - 1052-7613 .- 1099-0755. ; 8:2, s. 273-285
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Journal article (peer-reviewed)abstract
- 1. Ten south Swedish streams were selected to represent two distinct types—natural woodland streams and channelized streams. Measurements were made on leaching, decomposition and microbial respiration of the dominant riparian vegetation (European Black Alder), structure of the benthic macroinvertebrate community, macroinvertebrates inhabiting leaf material, channel morphometry, macrophyte composition, water chemistry and total accumulated degree days.2. Leaf decomposition rates were not significantly different when channelized streams were compared with natural woodland streams. In channelized streams the average decomposition rate was −0.0556±0.0337 (±S.D.) day−1 compared with −0.0457±0.0115 day−1 in natural woodland streams.3. There was significantly higher variation in leaf decomposition among the five channelized streams compared with the five natural streams (F–test, p<0.05). This was mainly due to extremely high decomposition rates in channelized streams colonized by emergent macrophytes.4. Alder decomposition rates were low in channelized streams without macrophytes (−0.0053 °day−1), intermediate in natural streams (−0.0087 °day−1), and high in channelized streams with macrophytes (−0.0136 °day−1).5. The shredder functional group ranged from 13 to 70% of the benthic community in the natural streams. Channelized streams had a more variable shredder population ranging from 0.5 to 80%. The highest values were found in channelized streams that had become colonized by macrophytes.6. There was a significant difference in total accumulated degree days between the channelized (256 °day) and natural woodland streams (209 °day). This is most likely an effect of drainage tiles contributing warmer groundwater to the channelized streams during fall.7. It is concluded that, contrary to the prevailing conceptual model of stream systems, decomposition rates and macroinvertebrate functions are not necessarily reduced in streams without riparian vegetation. The loss of the riparian canopy can stimulate emergent macrophytes which will provide autochthonous detritus for benthic communities. This will change benthic community structure and the life cycle strategies present.
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| 31. |
- Vought, Lena, et al.
(author)
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Effect of riparian structure, temperature and channel morphometry on detritus processing in channelized and natural woodland streams in southern Sweden
- 1998
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In: Aquatic Conservation. - 1052-7613. ; 8:2, s. 273-285
-
Journal article (peer-reviewed)abstract
- 1. Ten south Swedish streams were selected to represent two distinct types - natural woodland streams and channelized streams. Measurements were made on leaching, decomposition and microbial respiration of the dominant riparian vegetation (European Black Alder), structure of the benthic macroinvertebrate community, macroinvertebrates inhabiting leaf material, channel morphometry, macrophyte composition, water chemistry and total accumulated degree days. 2. Leaf decomposition rates were not significantly different when channelized streams were compared with natural woodland streams. In channelized streams the average decomposition rate was -0.0556±0.0337 (±S.D.) day-1 compared with -0.0457±0.0115 day-1 in natural woodland streams. 3. There was significantly higher variation in leaf decomposition among the five channelized streams compared with the five natural streams (F-test, p<0.05). This was mainly due to extremely high decomposition rates in channelized streams colonized by emergent macrophytes. 4. Alder decomposition rates were low in channelized streams without macrophytes (-0.0053 °day-1), intermediate in natural streams (-0.0087 °day-1), and high in channelized streams with macrophytes (-0.0136 °day-1). 5. The shredder functional group ranged from 13 to 70% of the benthic community in the natural streams. Channelized streams had a more variable shredder population ranging from 0.5 to 80%. The highest values were found in channelized streams that had become colonized by macrophytes. 6. There was a significant difference in total accumulated degree days between the channelized (256 °day) and natural woodland streams (209 °day). This is most likely an effect of drainage tiles contributing warmer groundwater to the channelized streams during fall. 7. It is concluded that, contrary to the prevailing conceptual model of stream systems, decomposition rates and macroinvertebrate functions are not necessarily reduced in streams without riparian vegetation. The loss of the riparian canopy can stimulate emergent macrophytes which will provide autochthonous detritus for benthic communities. This will change benthic community structure and the life cycle strategies present.
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