| 21. |
- Berg, Åke, et al.
(författare)
-
Power-line corridors as source habitat for butterflies in forest landscapes
- 2016
-
Ingår i: Biological Conservation. - : ELSEVIER SCI LTD. - 0006-3207 .- 1873-2917. ; 201, s. 320-326
-
Tidskriftsartikel (refereegranskat)abstract
- Modern intensified agriculture has decreased farmland heterogeneity, which has led to strong negative effects on farmland biodiversity. However, partly forested landscapes seem to offer many alternative habitats for open habitat species such as butterflies, since modern forestry and development of infrastructure has created several new environments such as forest road verges and power-line corridors. The aim of the present study was to investigate the importance of power-line corridors (PLCs) as butterfly habitats by testing i) if species richness and abundance of butterflies in PLCs are affected by adjacent habitat composition (i.e. comparisons of PLCs with different adjacent habitats), ii) if PLCs act as source habitat through spill-over of individuals into adjacent forest roads and semi-natural pastures and iii) if species composition differs among the investigated habitat types. To investigate this we censured the butterfly fauna in 23 study landscapes in south-central Sweden. We found support for the hypothesis that PLCs may act as source habitats for butterflies in forest roads and pastures, since species richness and abundance were decreasing with increasing distance to PLC from 0 to 500 m. In addition, the species composition in forest roads and pastures close to and far from PLCs was similar, suggesting that this increase was not due to an increase of PLC specialists in the other two habitats. Thus, we have shown that PLCs in themselves are important butterfly habitats independently of adjacent habitat composition (adjacent mature forest, clear cuts or arable land), and they contribute to increased species richness and abundance of butterflies in surrounding areas over 10 times larger than their own width. (C) 2016 Elsevier Ltd. All rights reserved.
|
|
| 22. |
|
|
| 23. |
- Bergman, Alexander, et al.
(författare)
-
Sindbis Virus Infection in Non-Blood-Fed Hibernating Culex pipiens Mosquitoes in Sweden
- 2020
-
Ingår i: Viruses. - : MDPI AG. - 1999-4915. ; 12:12
-
Tidskriftsartikel (refereegranskat)abstract
- A crucial, but unresolved question concerning mosquito-borne virus transmission is how these viruses can remain endemic in regions where the transmission is halted for long periods of time, due to mosquito inactivity in, e.g., winter. In northern Europe, Sindbis virus (SINV) (genus alphavirus, Togaviridae) is transmitted among birds by Culex mosquitoes during the summer, with occasional symptomatic infections occurring in humans. In winter 2018-19, we sampled hibernating Culex spp females in a SINV endemic region in Sweden and assessed them individually for SINV infection status, blood-feeding status, and species. The results showed that 35 out of the 767 collected mosquitoes were infected by SINV, i.e., an infection rate of 4.6%. The vast majority of the collected mosquitoes had not previously blood-fed (98.4%) and were of the species Cx. pipiens (99.5%). This is the first study of SINV overwintering, and it concludes that SINV can be commonly found in the hibernating Cx. pipiens population in an endemic region in Sweden, and that these mosquitoes become infected through other means besides blood-feeding. Further studies on mosquito ecology and viral interactions are needed to elucidate the mechanisms of the persistence of these viruses over winter.
|
|
| 24. |
- Bergman, Erika, et al.
(författare)
-
Time trends in pediatric fractures in a Swedish city from 1950 to 2016
- 2020
-
Ingår i: Acta Orthopaedica. - : Medical Journals Sweden AB. - 1745-3674 .- 1745-3682. ; 91:5, s. 598-604
-
Tidskriftsartikel (refereegranskat)abstract
- Background and purpose — As previous studies indicate time trends in pediatric fracture incidence, we followed the incidence in a Swedish city between 1950 and 2016. Patients and methods — Malmö city, Sweden had 322,574 inhabitants in 2015. We used diagnosis registry, charts, and radiographs of the only city hospital to classify fractures in individuals < 16 years in 2014–2016, and compared these with data from 1950–2006. We used joinpoint regression to analyze time trends and present results as mean annual percentage changes (APC). Differences between periods are described as incident rate ratios (IRR). To describe uncertainty, 95% confidence intervals (CI) are used. Results — During 2014–2016 the pediatric fracture incidence was 1,786 per 105 person-years (boys 2,135 and girls 1,423). From 1950 onwards age-adjusted fracture incidence increased until 1979 in both boys (APC +1.5%, CI 1.2–1.8) and girls (APC +1.6%, CI 0.8–2.5). The incidence remained stable from 1979 to 2016 (APC in boys 0.0%, CI –0.3 to 0.3 and in girls –0.2%, CI –1.1 to 0.7). Age-adjusted incidence 2014–2016 was higher than 2005–2006 in girls (IRR 1.1, CI 1.03–1.3), but not in boys (IRR 1.0, CI 0.9–1.1). Interpretation — Fracture incidence was in girls higher in 2014–2016 than in 2005–2006. However, only with more than 2 measuring points are meaningful trend analyses possible. When we analyzed the period 1950–2016 with 17 measuring points and joinpoint regression, we found that fracture incidence increased in both sexes until 1979 but has thereafter been stable.
|
|
| 25. |
- Bergman, Åke
(författare)
-
Alla kemister behöver miljökemin
- 2010
-
Ingår i: Kemivärlden Biotech med Kemisk Tidskrift. ; 10, s. 59-
-
Tidskriftsartikel (refereegranskat)
|
|
| 26. |
- Bergman, Åke, et al.
(författare)
-
Analys av klorparaffiner i bröstmjölk och serum
- 2022
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Klorparaffiner (CP) utgör en stor grupp av polyklorerade alkaner av olika kolkedjelängder och olika kloreringsgrad; kortkedjiga (C10 – C13, SCCP), medellånga (C14 – C17, MCCP) och långa (≥C18, LCCP). CP produceras i mycket stora volymer för användning som additiv (bl.a. som mjukgörare och flamskyddsmedel) i produkter, material och varor. De är globala miljöföroreningar som förekommer i abiotisk miljö, djur och människor. Hypotesen för den studie som nu genomförts är att CP uppvisar olika ackumulationsgrad i blod (serum eller plasma) jämfört med bröstmjölk. Därför har parade prover från 25 kvinnor som donerat blod och bröstmjölk analyserats med avseenden på CP i dessa båda matriser och halterna har jämförts med halter av en PCB-markör, CB-153, samt med 4,4’-DDE. Analyserna visar signifikanta haltskillnader, på fettviktsbasis, av SCCP och MCCP i serum på 22 respektive 6.2 gånger högre koncentrationer än de som uppmätts i bröstmjölken. Data visade även förhöjda halter av såväl vSCCPs (mycket korta CP) som LCCPs i serum jämfört med bröstmjölk men skillnaden i dessa båda fall är inte signifikant säkerställd. Medianhalterna av SCCP, MCCP och LCCP i serum respektive bröstmjölk är: 790, 520 och 16 ng/g fett respektive 36, 63 och 6,0 ng/g fett. 4,4’-DDE och CB-153 är jämförbara i de båda matriserna och ligger på 17 respektive 12 ng/g fett. SCCP är klassificerad som en POP i Stockholmskonventionen men inte MCCP trots höga halter i serum. CP är, oavsett kolkedjelängd, persistenta.
|
|
| 27. |
- Bergman, Åke, et al.
(författare)
-
A novel abbreviation standard for organobromine, organochlorine and organophosphorus flame retardants and some characteristics of the chemicals
- 2012
-
Ingår i: Environment International. - : Elsevier BV. - 0160-4120 .- 1873-6750. ; 49, s. 57-82
-
Forskningsöversikt (refereegranskat)abstract
- Ever since the interest in organic environmental contaminants first emerged 50 years ago, there has been a need to present discussion of such chemicals and their transformation products using simple abbreviations so as to avoid the repetitive use of long chemical names. As the number of chemicals of concern has increased, the number of abbreviations has also increased dramatically, sometimes resulting in the use of different abbreviations for the same chemical. In this article, we propose abbreviations for flame retardants (FRs) substituted with bromine or chlorine atoms or including a functional group containing phosphorus, i.e. BFRs, CFRs and PFRs, respectively. Due to the large number of halogenated and organophosphorus FRs, it has become increasingly important to develop a strategy for abbreviating the chemical names of FRs. In this paper, a two step procedure is proposed for deriving practical abbreviations (PRABs) for the chemicals discussed. In the first step, structural abbreviations (STABs) are developed using specific STAB criteria based on the FR structure. However, since several of the derived STABs are complicated and long, we propose instead the use of PRABs. These are, commonly, an extract of the most essential part of the STAB, while also considering abbreviations previously used in the literature. We indicate how these can be used to develop an abbreviation that can be generally accepted by scientists and other professionals involved in FR related work. Tables with PRABs and STABs for BFRs, CFRs and PERs are presented, including CAS (Chemical Abstract Service) numbers, notes of abbreviations that have been used previously, CA (Chemical Abstract) name, common names and trade names, as well as some fundamental physicochemical constants.
|
|
| 28. |
|
|
| 29. |
- Bergman, Åke, 1950-
(författare)
-
EDC-2020 : Summary for decision-makers
- 2019
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- EDC-2020 - A research project on endocrine disrupting chemicals, which brought together researchers from different subject areas for the development of a chemical-safe world.The global production of man-made chemicals is increasing dramatically. Research shows that the impact of chemicals on human health and the environment leads to extensive societal costs and that risk assessment has major shortcomings. EDC-2020 was started to meet these challenges in the long term. Researchers from different subject areas have worked together and have improved the understanding of problems and risks of endocrine disruptors in quite some detail. EDC-2020 has also increased collaboration in the educational area related to risk assessments of chemicals.
|
|
| 30. |
- Bergman, Åke, 1950-
(författare)
-
EDC-2020 Sammanfattning för beslutsfattare
- 2019
-
Rapport (populärvet., debatt m.m.)abstract
- EDC-2020 – Ett forskningsprojekt om hormonstörande kemikalier, som sammanfört forskare från olika ämnesområden för utveckling av en kemikaliesäker värld. Den globala produktionen av kemikalier ökar mycket kraftigt. Forskningen visar att kemikaliers påverkan på människors hälsa och miljö leder till omfattande samhällskostnader och att riskbedömningen har stora brister. EDC- 2020 startades för att långsiktigt möta dessa utmaningar.Forskare från olika ämnesområden har arbetat tillsammans och har kommit flera steg vidare med att i detalj förstå problemen med hormonstörande ämnen. EDC-2020 har dessutom ökat samverkan kring utbildning inom området.
|
|
