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Risk of pneumonia among residents living near goat and poultry farms during 2014-2016
Post, Pim M. ; Hogerwerf, Lenny ; Huss, Anke ; Petie, Ronald ; Boender, Gert Jan ; Baliatsas, Christos ; Lebret, Erik ; Heederik, Dick ; Hagenaars, Thomas J. ; IJzermans, Joris C. ; Smit, Lidwien A.M. - \ 2019
PLoS ONE 14 (2019)10. - ISSN 1932-6203
In the Netherlands, an association was found between the prevalence of pneumonia and living near goat and poultry farms in 2007-2013. This association then led to regulatory decisions to restrict the building of new goat farms and to reduce emissions of poultry farms. Confirmation of these results, however, is required because the period of previous analyses overlapped a Q-fever epidemic in 2007-2010. To confirm the association, we performed a population-based study during 2014-2016 based on general practitioner (GP) data. Electronic medical records of 90,183 persons were used to analyze the association between pneumonia and the population living in the proximity (within 500-2000 m distance) of goat and poultry farms. Data were analyzed with three types of logistic regression (with and without GP practice as a random intercept and with stratified analyses per GP practice) and a kernel model to discern the influence of different statistical methods on the outcomes. In all regression analyses involving adults, a statistically significant association between pneumonia and residence within 500 meters of goat farms was found (odds ratio [OR] range over all analyses types: 1.33-1.60), with a decreasing OR for increasing distances. In kernel analyses (including all ages), a population-attributable risk between 6.0 and 7.8% was found for a distance of 2000 meters in 2014-2016. The associations were consistent across all years and robust for mutual adjustment for proximity to other animals and for several other sensitivity analyses. However, associations with proximity to poultry farms are not supported by the present study. As the causes of the elevated pneumonia incidence in persons living close to goat farms remain unknown, further research into potential mechanisms is required for adequate prevention.
Research on exposure of residents to pesticides in the Netherlands : OBO flower bulbs = Onderzoek Bestrijdingsmiddelen en Omwonenden
Gooijer, Y.M. ; Hoftijser, G.W. ; Lageschaar, L.C.C. ; Oerlemans, A. ; Scheepers, P.T.J. ; Kivits, C.M. ; Duyzer, J. ; Gerritsen-Ebben, M.G. ; Figueiredo, D.M. ; Huss, A. ; Krop, E.J.M. ; Vermeulen, R.C.H. ; Berg, F. van den; Holterman, H.J. ; Jacobs, C.J.M. ; Kruijne, R. ; Mol, J.G.J. ; Wenneker, M. ; Zande, J.C. van de; Sauer, P.J.J. - \ 2019
Netherlands : Utrecht University - 381
Warmer and browner waters decrease fish biomass production
Dorst, Renee M. Van; Gårdmark, Anna ; Svanbäck, Richard ; Beier, Ulrika ; Weyhenmeyer, Gesa A. ; Huss, Magnus - \ 2019
Global Change Biology 25 (2019)4. - ISSN 1354-1013 - p. 1395 - 1408.
biomass production - browning - Climate change - Eurasian perch - fish - individual body grwoth - lakes - length distribution - ontogeny - warming
Climate change studies have long focused on effects of increasing temperatures,
often without considering other simultaneously occurring environmental changes, such as browning of waters. Resolving how the combination of warming and browning of aquatic ecosystems affects fish biomass production is essential for future ecosystem functioning, fisheries, and food security. In this study, we analyzed individual‐ and population‐level fish data from 52 temperate and boreal lakes in Northern Europe, covering large gradients in water temperature and color (absorbance, 420 nm). We show that fish (Eurasian perch, Perca fluviatilis) biomass production decreased with both high water temperatures and brown water color, being lowest in warm and brown lakes. However, while both high temperature and brown water decreased fish biomass production, the mechanisms behind the decrease differed: temperature affected the fish biomass production mainly through a decrease in population standing stock biomass, and through shifts in size‐ and age‐distributions toward a higher proportion of young and small individuals in warm lakes; brown water color, on the other hand, mainly influenced fish biomass production through negative effects on individual body growth and length‐at‐ age. In addition to these
findings, we observed that the effects of temperature and brown water color on
individual‐level processes varied over ontogeny. Body growth only responded positively to higher temperatures among young perch, and brown water color had a stronger negative effect on body growth of old than on young individuals. Thus, to better understand and predict future fish biomass production, it is necessary to integrate both individual‐ and population‐level responses and to acknowledge within species variation. Our results suggest that global climate change, leading to browner and warmer waters, may negatively affect fish biomass production, and this effect may be stronger than caused by increased temperature or water color alone
Veehouderij en gezondheid omwonenden III : Longontsteking in de nabijheid van geiten- en pluimveehouderijen; actualisering van gegevens uit huisartspraktijken 2014-2016
IJzermans, C.J. ; Smit, L.A.M. ; Heederik, D.J.J. ; Hagenaars, T.J. ; Baliatsas, C. ; Dückers, M. ; Huss, A. ; Hogerwerf, L. ; Post, P. ; Boender, G.J. ; Petie, R. - \ 2018
Utrecht : NIVEL - ISBN 9789461225153 - 52
Assessment of residential environmental exposure to pesticides from agricultural fields in the Netherlands
Brouwer, Maartje ; Kromhout, Hans ; Vermeulen, Roel ; Duyzer, Jan ; Kramer, Henk ; Hazeu, Gerard ; Snoo, Geert De; Huss, Anke - \ 2018
Journal of Exposure Science and Environmental Epidemiology 28 (2018)2. - ISSN 1559-0631 - p. 173 - 181.
environmental monitoring - exposure modeling - pesticides
We developed a spatio-temporal model for the Netherlands to estimate environmental exposure to individual agricultural pesticides at the residential address for application in a national case-control study on Parkinson's disease (PD). Data on agricultural land use and pesticide use were combined to estimate environmental exposure to pesticides for the period 1961 onwards. Distance categories of 0-50 m, >50-100 m, >100-500 m and >500-1000 m around residences were considered. For illustration purposes, exposure was estimated for the control population (n=607) in the PD case-control study. In a small validation effort, model estimates were compared with pesticide measurements in air and precipitation collected at 17 stations in 2000-2001. Estimated exposure prevalence was higher for pesticides used on commonly cultivated (rotating) crops than for pesticides used on fruit and bulbs only. Prevalence increased with increasing distance considered. Moderate-to-high correlations were observed between model estimates (>100-500 m and >500-1000 m) and environmental pesticide concentrations measured in 2000-2001. Environmental exposure to individual pesticides can be estimated using relevant spatial and temporal data sets on agricultural land use and pesticide use. Our approach seems to result in accurate estimates of average environmental exposure, although it remains to be investigated to what extent this reflect personal exposure to agricultural pesticides.
Impact of input data uncertainty on environmental exposure assessment models: A case study for electromagnetic field modelling from mobile phone base stations
Beekhuizen, J. ; Heuvelink, G.B.M. ; Huss, A. ; Burgi, A. ; Kromhout, H. ; Vermeulen, R. - \ 2014
Environmental Research 135 (2014). - ISSN 0013-9351 - p. 148 - 155.
air-pollution exposure - noise - risk
Background: With the increased availability of spatial data and computing power, spatial prediction approaches have become a standard tool for exposure assessment in environmental epidemiology. However, such models are largely dependent on accurate input data. Uncertainties in the input data can therefore have a large effect on model predictions, but are rarely quantified. Methods: With Monte Carlo simulation we assessed the effect of input uncertainty on the prediction of radio-frequency electromagnetic fields (RF-EMF) from mobile phone base stations at 252 receptor sites in Amsterdam, The Netherlands. The impact on ranking and classification was determined by computing the Spearman correlations and weighted Cohen's Kappas (based on tertiles of the RF-EMF exposure distribution) between modelled values and RF-EMF measurements performed at the receptor sites. Results: The uncertainty in modelled RF-EMF levels was large with a median coefficient of variation of 1.5. Uncertainty in receptor site height, building damping and building height contributed most to model output uncertainty. For exposure ranking and classification, the heights of buildings and receptor sites were the most important sources of uncertainty, followed by building damping, antenna- and site location. Uncertainty in antenna power, tilt, height and direction had a smaller impact on model performance. Conclusions: We quantified the effect of input data uncertainty on the prediction accuracy of an RF-EMF environmental exposure model, thereby identifying the most important sources of uncertainty and estimating the total uncertainty stemming from potential errors in the input data. This approach can be used to optimize the model and better interpret model output. (C) 2014 Elsevier Inc. All rights reserved.
Intra-cohort cannibalism and size bimodality: A balance between hatching synchrony and resource feedbacks
Huss, M. ; Kooten, T. van; Persson, L. - \ 2010
Oikos 119 (2010)12. - ISSN 0030-1299 - p. 2000 - 2011.
perch perca-fluviatilis - ontogenic niche shifts - the-year perch - largemouth bass - stizostedion-lucioperca - structured populations - dependent cannibalism - versatile technique - maternal influences - sulejow reservoir
Cannibalistic interactions generally depend on the size relationship between cannibals and victims. In many populations, a large enough size variation to allow for cannibalism may not only develop among age-cohorts but also within cohorts. We studied the implications of variation in hatching period length and initial cohort size for the emergence of cannibalism and bimodal size distributions within animal cohorts using a physiologically structured population model. We found that the development of size bimodality was critically dependent on hatching period length, victim density and the presence of a feedback via shared resources. Cannibals only gained enough energy from cannibalism to accelerate in growth when victim density was high relative to cannibal density at the onset of cannibalism. Furthermore, we found that the opportunity for early hatchers to initially feed on an unexploited resource increases the likelihood both for cannibalism to occur and size bimodality to develop. Once cannibals accelerated in growth relative to victims size bimodality, reduced victim numbers and relaxed resource competition resulted. Thus, in addition to that cannibals profited from cannibalism through energy extraction, their potential victims also benefited as the resource recovered due to cannibal thinning. To ensure recruitment success, it can be critical that a few individuals can accelerate in growth and reach a size large enough to escape size-dependent predation and winter starvation. Hence, within-cohort cannibalism may be a potentially important mechanism to explain recruitment variation especially for cannibalistic species in temperate climates with strong seasonality. However, the scope for size bimodality to develop as a result of cannibalism may be limited by low victim densities and size and food-dependent growth rates.
|Revising forestry curricula: some recommendations at the end of the Workshop.
Schmidt, P. ; Pettenella, D. - \ 1998
In: New requirements for university education in forestry - p. 113 - 118.
|Revising forestry curricula: some considerations at the start of the Workshop.
Schmidt, P. - \ 1998
In: New requirements for university education in forestry. P. Schmidt, J. Huss, S. Lewark, D. Pettenella, O. Saastamoinen (eds.) Demeter Series 1 - p. 7 - 14.
|Objectives of forestry university education according to current curricula.
Huss, J. ; Schmidt, P. - \ 1998
In: New requirements for university education in forestry - p. 95 - 108.
|Proposal for a MSc in European forestry.
Gossow, H. ; Schmidt, P. - \ 1998
In: New requirements for university education in forestry - p. 383 - 385.
|Frankia symbiosis : proceedings of the 12th meeting on Frankia and actinorhizal plants, Carry-le-Rouet, France, June 2001 /
Akkermans, A.D.L. ; Baker, D. ; Huss-Danell, K. ; Tjepkema, J.D. - \ 1984
Dordrecht : Kluwer (Developments in plant and soil sciences 100) - ISBN 9781402015199 - 244 p.
|Utilization of carbon and nitrogen compounds by Frankia in synthetic media and in root nodules of Alnus glutinosa, Hippophae rhamnoides and Datisca cannabina
Akkermans, A.D.L. ; Roelofsen, W. ; Blom, J. ; Huss-Danell, K. ; Harkink, R. - \ 1983
Canadian Journal of Botany 61 (1983). - ISSN 0008-4026 - p. 2793 - 2800.
|The carbonand nitrogen metabolism of Frankia in pure culture and in root nodules
Akkermans, A.D.L. ; Blom, J. ; Huss-Danell, K. ; Roelofsen, W. - \ 1982
In: Proc. SITRA Symposium Helsinki - p. 169 - 179.
Carbon metabolism of Frankia spp. in root nodules of Alnus glutinosa and Hippophae rhamnoides
Akkermans, A.D.L. ; Huss-Danell, K. ; Roelofsen, W. ; Meijer, P. - \ 1982
Physiologia Plantarum 54 (1982). - ISSN 0031-9317 - p. 461 - 466.
Enzymes of the tricarboxylic acid cycle and the malate-aspartate shuttle in the N2-fixing endophyte of Alnus glutinosa
Akkermans, A.D.L. ; Huss-Danell, K. ; Roelofsen, W. - \ 1981
Physiologia Plantarum 53 (1981). - ISSN 0031-9317 - p. 289 - 294.