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Castor C, Björk M, Bai J, Berlin H, Kristjansdottir G, Kristjansdottir O, Hansson H, Höök A, Stenström P, Nilsson S. Psychometric evaluation of the electronic faces thermometer scale for pain assessment in children 8-17 years old: A study protocol. Paediatr Neonatal Pain 2023; 5:99-109. [PMID: 38149216 PMCID: PMC10749404 DOI: 10.1002/pne2.12102] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 02/13/2023] [Accepted: 02/21/2023] [Indexed: 12/28/2023]
Abstract
It is often a challenge for a child to communicate their pain, and their possibilities to do so should be strengthened in healthcare settings. Digital self-assessment provides a potential solution for person-centered care in pain management and promotes child participation when a child is ill. A child's perception of pain assessment differs when it is assessed using digital or analog formats. As we move into the digital era, there is an urgent need to validate digital pain assessment tools, including the newly developed electronic Faces Thermometer Scale (eFTS). This study protocol describes three studies with the overall aim to evaluate psychometric properties of the eFTS for assessing pain in children 8-17 years of age. A multi-site project design combining quantitative and qualitative methods will be used for three observational studies. Study 1: 100 Swedish-speaking children will report the level of anticipated pain from vignettes describing painful situations in four levels of pain and a think-aloud method will be used for data collection. Data will be analyzed with phenomenography as well as descriptive and comparative statistics. Study 2: 600 children aged 8-17 years at pediatric and dental settings in Sweden, Denmark, Iceland, and USA will be included. Children will assess their pain intensity due to medical or dental procedures, surgery, or acute pain using three different pain Scales for each time point; the eFTS, the Faces Pain Scale Revised, and the Coloured Analogue Scale. Descriptive and comparative statistics will be used, with subanalysis taking cultural context into consideration. Study 3: A subgroup of 20 children out of these 600 children will be purposely included in an interview to describe experiences of grading their own pain using the eFTS. Qualitative data will be analyzed with content analysis. Our pilot studies showed high level of adherence to the study procedure and rendered only a small revision of background questionnaires. Preliminary analysis indicated that the instruments are adequate to be used by children and that the analysis plan is feasible. A digital pain assessment tool contributes to an increase in pain assessment in pediatric care. The Medical Research Council framework for complex interventions in healthcare supports a thorough development of a new scale. By evaluating psychometric properties in several settings by both qualitative and quantitative methods, the eFTS will become a well-validated tool to strengthen the child's voice within healthcare.
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Affiliation(s)
- C. Castor
- Department of Health Sciences, Faculty of MedicineLund UniversityLundSweden
| | - M. Björk
- The CHILD Research Group, Department of Nursing, School of Health and WelfareJönköping UniversityJönköpingSweden
| | - J. Bai
- Nell Hodgson Woodruff School of NursingEmory UniversityAtlantaGeorgiaUSA
| | - H. Berlin
- Department of Pediatric Dentistry, Faculty of OdontologyMalmö UniversityMalmöSweden
| | - G. Kristjansdottir
- Faculty of Nursing, School of Health ScienceUniversity of IcelandReykjavikIceland
| | - O. Kristjansdottir
- Faculty of Nursing, School of Health ScienceUniversity of IcelandReykjavikIceland
| | - H. Hansson
- Department of Paediatrics and Adolescent MedicineCopenhagen University Hospital RigshospitaletCopenhagenDenmark
- Department of Clinical MedicineUniversity of CopenhagenCopenhagenDenmark
| | - A. Höök
- Division of Anaesthetics and Sensory Organs Speciality SurgeryLinköping University HospitalLinköpingSweden
| | - P. Stenström
- Department of Pediatric SurgerySkåne University Hospital, Lund UniversityLundSweden
- Department of Paediatrics, Faculty of MedicineLund UniversityLundSweden
| | - S. Nilsson
- Department of Health Sciences, Faculty of MedicineLund UniversityLundSweden
- Institute of Health and Care Sciences, Sahlgrenska AcademyUniversity of GothenburgGothenburgSweden
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Moreira-Saporiti A, Teichberg M, Garnier E, Cornelissen JHC, Alcoverro T, Björk M, Boström C, Dattolo E, Eklöf JS, Hasler-Sheetal H, Marbà N, Marín-Guirao L, Meysick L, Olivé I, Reusch TBH, Ruocco M, Silva J, Sousa AI, Procaccini G, Santos R. A trait-based framework for seagrass ecology: Trends and prospects. Front Plant Sci 2023; 14:1088643. [PMID: 37021321 PMCID: PMC10067889 DOI: 10.3389/fpls.2023.1088643] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 02/06/2023] [Indexed: 06/19/2023]
Abstract
In the last three decades, quantitative approaches that rely on organism traits instead of taxonomy have advanced different fields of ecological research through establishing the mechanistic links between environmental drivers, functional traits, and ecosystem functions. A research subfield where trait-based approaches have been frequently used but poorly synthesized is the ecology of seagrasses; marine angiosperms that colonized the ocean 100M YA and today make up productive yet threatened coastal ecosystems globally. Here, we compiled a comprehensive trait-based response-effect framework (TBF) which builds on previous concepts and ideas, including the use of traits for the study of community assembly processes, from dispersal and response to abiotic and biotic factors, to ecosystem function and service provision. We then apply this framework to the global seagrass literature, using a systematic review to identify the strengths, gaps, and opportunities of the field. Seagrass trait research has mostly focused on the effect of environmental drivers on traits, i.e., "environmental filtering" (72%), whereas links between traits and functions are less common (26.9%). Despite the richness of trait-based data available, concepts related to TBFs are rare in the seagrass literature (15% of studies), including the relative importance of neutral and niche assembly processes, or the influence of trait dominance or complementarity in ecosystem function provision. These knowledge gaps indicate ample potential for further research, highlighting the need to understand the links between the unique traits of seagrasses and the ecosystem services they provide.
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Affiliation(s)
- Agustín Moreira-Saporiti
- Faculty for Biology and Chemistry, University of Bremen, Bremen, Germany
- Algae and Seagrass Ecology Group, Department of Ecology, Leibniz Centre for Tropical Marine Research, Bremen, Germany
| | - Mirta Teichberg
- Algae and Seagrass Ecology Group, Department of Ecology, Leibniz Centre for Tropical Marine Research, Bremen, Germany
| | - Eric Garnier
- CEFE, Univ Montpellier, CNRS, EPHE, IRD, Montpellier, France
| | | | | | - Mats Björk
- Department of Ecology, Environment and Plant Sciences (DEEP), Stockholm University, Stockholm, Sweden
| | | | - Emanuela Dattolo
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Johan S. Eklöf
- Department of Ecology, Environment and Plant Sciences (DEEP), Stockholm University, Stockholm, Sweden
| | | | - Nuria Marbà
- Global Change Research Group, Institut Mediterrani d’Estudis Avançats (IMEDEA, CSIC-UIB), Esporles Illes Balears, Spain
| | - Lázaro Marín-Guirao
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, Italy
- Oceanographic Center of Murcia, Spanish Institute of Oceanography (IEO-CSIC), Murcia, Spain
| | - Lukas Meysick
- Åbo Akademi University, Environmental and Marine Biology, Åbo, Finland
- Helmholtz Institute for Functional Marine Biodiversity (HIFMB) at the University of Oldenburg, Oldenburg, Germany
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
| | - Irene Olivé
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, Italy
- School of Geographical and Earth Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Thorsten B. H. Reusch
- Marine Evolutionary Ecology, Division of Marine Ecology, GEOMAR Helmholtz Center for Ocean Research Kiel, Kiel, Germany
| | - Miriam Ruocco
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, Italy
| | - João Silva
- Centro de Ciências do Mar, Universidade do Algarve, Campus de Gambelas, Faro, Portugal
| | - Ana I. Sousa
- CESAM – Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Gabriele Procaccini
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Rui Santos
- Centro de Ciências do Mar, Universidade do Algarve, Campus de Gambelas, Faro, Portugal
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Björk M, Rosenqvist G, Gröndahl F, Bonaglia S. Methane emissions from macrophyte beach wrack on Baltic seashores. Ambio 2023; 52:171-181. [PMID: 36029461 PMCID: PMC9666566 DOI: 10.1007/s13280-022-01774-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 06/27/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Beach wrack of marine macrophytes is a natural component of many beaches. To test if such wrack emits the potent greenhouse gas methane, field measurements were made at different seasons on beach wrack depositions of different ages, exposure, and distance from the water. Methane emissions varied greatly, from 0 to 176 mg CH4-C m-2 day-1, with a clear positive correlation between emission and temperature. Dry wrack had lower emissions than wet. Using temperature data from 2016 to 2020, seasonal changes in fluxes were calculated for a natural wrack accumulation area. Such calculated average emissions were close to zero during winter, but peaked in summer, with very high emissions when daily temperatures exceeded 20 °C. We conclude that waterlogged beach wrack significantly contributes to greenhouse gas emissions and that emissions might drastically increase with increasing global temperatures. When beach wrack is collected into heaps away from the water, the emissions are however close to zero.
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Affiliation(s)
- Mats Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91 Stockholm, Sweden
| | - Gunilla Rosenqvist
- Blue Centre Gotland, Uppsala University-Campus Gotland, 621 67 Visby, Sweden
| | - Fredrik Gröndahl
- KTH, Royale Institute of Technology, KTH Teknikringen 10B, Stockholm, Sweden
- Department of Sustainable Development, Environmental Science and Engineering, 100 44 Stockholm, Sweden
| | - Stefano Bonaglia
- Department of Marine Sciences, University of Gothenburg, Box 461, 405 30 Gothenburg, Sweden
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Dahl M, Ismail R, Braun S, Masqué P, Lavery PS, Gullström M, Arias-Ortiz A, Asplund ME, Garbaras A, Lyimo LD, Mtolera MSP, Serrano O, Webster C, Björk M. Impacts of land-use change and urban development on carbon sequestration in tropical seagrass meadow sediments. Mar Environ Res 2022; 176:105608. [PMID: 35358909 DOI: 10.1016/j.marenvres.2022.105608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/13/2022] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
Seagrass meadows store significant carbon stocks at a global scale, but land-use change and other anthropogenic activities can alter the natural process of organic carbon (Corg) accumulation. Here, we assessed the carbon accumulation history of two seagrass meadows in Zanzibar (Tanzania) that have experienced different degrees of disturbance. The meadow at Stone Town has been highly exposed to urban development during the 20th century, while the Mbweni meadow is located in an area with relatively low impacts but historical clearing of adjacent mangroves. The results showed that the two sites had similar sedimentary Corg accumulation rates (22-25 g m-2 yr-1) since the 1940s, while during the last two decades (∼1998 until 2018) they exhibited 24-30% higher accumulation of Corg, which was linked to shifts in Corg sources. The increase in the δ13C isotopic signature of sedimentary Corg (towards a higher seagrass contribution) at the Stone Town site since 1998 points to improved seagrass meadow conditions and Corg accumulation capacity of the meadow after the relocation of a major sewage outlet in the mid-1990s. In contrast, the decrease in the δ13C signatures of sedimentary Corg in the Mbweni meadow since the early 2010s was likely linked to increased Corg run-off of mangrove/terrestrial material following mangrove deforestation. This study exemplifies two different pathways by which land-based human activities can alter the carbon storage capacity of seagrass meadows (i.e. sewage waste management and mangrove deforestation) and showcases opportunities for management of vegetated coastal Corg sinks.
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Affiliation(s)
- Martin Dahl
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden; School of Natural Sciences, Technology and Environmental Studies, Södertörn University, Huddinge, Sweden.
| | - Rashid Ismail
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden; Institute of Marine Sciences (IMS), University of Dar es Salaam, Zanzibar, Tanzania
| | - Sara Braun
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Pere Masqué
- School of Science and Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, Western Australia, Australia; International Atomic Energy, Principality of Monaco, Monaco
| | - Paul S Lavery
- School of Science and Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Martin Gullström
- School of Natural Sciences, Technology and Environmental Studies, Södertörn University, Huddinge, Sweden
| | - Ariane Arias-Ortiz
- Ecosystem Science Division, Department of Environmental Science, Policy and Management, University of California, Berkeley, CA, USA; Institute of Marine Sciences, University of California Santa Cruz, California, USA
| | - Maria E Asplund
- Department of Biological and Environmental Sciences, University of Gothenburg, Kristineberg, Fiskebäckskil, Sweden
| | | | - Liberatus D Lyimo
- Department of Crop Science and Horticulture. Sokoine University of Agriculture, Morogoro, Tanzania
| | - Matern S P Mtolera
- Institute of Marine Sciences (IMS), University of Dar es Salaam, Zanzibar, Tanzania
| | - Oscar Serrano
- School of Science and Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, Western Australia, Australia; Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones Científicas (CEAB-CSIC), Blanes, Spain
| | - Chanelle Webster
- School of Science and Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Mats Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
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Kalokora OJ, Gullström M, Buriyo AS, Mtolera MSP, Björk M. Seagrass meadows mixed with calcareous algae have higher plant productivity and sedimentary blue carbon storage. Ecol Evol 2022; 12:e8579. [PMID: 35222957 PMCID: PMC8843821 DOI: 10.1002/ece3.8579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 01/10/2022] [Accepted: 01/11/2022] [Indexed: 11/15/2022] Open
Abstract
Seagrass meadows capture and store large amounts of carbon in the sediment beneath, thereby serving as efficient sinks of atmospheric CO2. Carbon sequestration levels may however differ greatly among meadows depending on, among other factors, the plant community composition. Tropical seagrass meadows are often intermixed with macroalgae, many of which are calcareous, which may compete with seagrass for nutrients, light, and space. While the photosynthetic CO2 uptake by both seagrasses and calcareous algae may increase the overall calcification in the system (by increasing the calcium carbonate saturation state, Ω), the calcification process of calcareous algae may lead to a release of CO2, thereby affecting both productivity and calcification, and eventually also the meadows’ carbon storage. This study estimated how plant productivity, CaCO3 production, and sediment carbon levels were affected by plant community composition (seagrass and calcareous algae) in a tropical seagrass‐dominated embayment (Zanzibar, Tanzania). Overall, the patterns of variability in productivity differed between the plant types, with net areal biomass productivity being highest in meadows containing both seagrass and calcareous algae. Low and moderate densities of calcareous algae enhanced seagrass biomass growth, while the presence of seagrass reduced the productivity of calcareous algae but increased their CaCO3 content. Sedimentary carbon levels were highest when seagrasses were mixed with low or moderate cover of calcareous algae. The findings show that plant community composition can be an important driver for ecosystem productivity and blue carbon sequestration.
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Affiliation(s)
- Olivia J. Kalokora
- Dar es Salaam University College of Education (DUCE) Dar es Salaam Tanzania
| | - Martin Gullström
- School of Natural Sciences, Technology and Environmental Studies Södertörn University Huddinge Sweden
| | - Amelia S. Buriyo
- Department of Botany University of Dar es Salaam Dar es Salaam Tanzania
| | | | - Mats Björk
- Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
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Björk M, Asplund ME, Deyanova D, Gullström M. The amount of light reaching the leaves in seagrass (Zostera marina) meadows. PLoS One 2021; 16:e0257586. [PMID: 34547042 PMCID: PMC8454950 DOI: 10.1371/journal.pone.0257586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 09/03/2021] [Indexed: 12/04/2022] Open
Abstract
Seagrass meadows, and other submerged vegetated habitats, support a wide range of essential ecological services, but the true extents of these services are in many ways still not quantified. One important tool needed to assess and model many of these services is accurate estimations of the systems´ primary productivity. Such productivity estimations require an understanding of the underwater light field, especially regarding the amount of light that actually reaches the plants' photosynthetic tissue. In this study, we tested a simple practical approach to estimate leaf light exposure, relative to incoming light at the canopy, by attaching light sensitive film at different positions on leaves of Zostera marina, eelgrass, in four seagrass meadows composed of different shoot density and at two different depths. We found that the light reaching the leaves decreased linearly down through the canopy. While the upper parts of the leaves received approximately the same level of light (photosynthetic photon flux density, PPFD) as recorded with a PAR meter at the canopy top, the average light that the seagrass leaves were exposed to varied between 40 and 60% of the light on top of the canopy, with an overall average of 48%. We recommend that actual light interception is measured when assessing or modelling light depending processes in submerged vegetation, but if this is not achievable a rough estimation for vegetation similar to Z. marina would be to use a correction factor of 0.5 to compensate for the reduced light due to leaf orientation and internal shading.
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Affiliation(s)
- Mats Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Maria E. Asplund
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Kristineberg, Fiskebäckskil, Sweden
| | - Diana Deyanova
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Kristineberg, Fiskebäckskil, Sweden
| | - Martin Gullström
- School of Natural Sciences, Technology and Environmental Studies, Södertörn University, Huddinge, Sweden
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Stensson M, Norderyd J, Van Riper M, Marks L, Björk M. Parents' perceptions of oral health, general health and dental health care for children with Down syndrome in Sweden. Acta Odontol Scand 2021; 79:248-255. [PMID: 33017197 DOI: 10.1080/00016357.2020.1824015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AIM To describe parental perceptions of general health, oral health and received dental health care in Swedish children with Down syndrome (DS). METHODS Online questionnaire, quantitative data analysis (Chi-square test). RESULTS Parents of 101 children with DS (52 boys, 49 girls, mean age: 9.6 years) participated. Seventy percent rated their child's general health and 74% their child's oral health as good or very good. Parents, who rated their child's oral health as poor (8%), also reported that dental procedures were difficult. Children received dental care at general (55%) and specialist clinics (53%). Ninety-four percent of parents of children receiving specialist dental health care were satisfied compared to 70% of parents with children in general clinics. The parents most valued characteristics of dental professionals were patience (63%) and their ability to engage the child (68%). Parents wanted multidisciplinary collaboration. CONCLUSION Most parents rated their child's general and oral health as good or very good. Children with poor oral health were also reported to have difficulties coping with dental procedures. Parents wanted dental care to be tailored to meet their child's unique needs. They wanted dental professionals to have knowledge about children with a need for special care. Lastly, they requested multidisciplinary collaboration.
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Affiliation(s)
- M. Stensson
- Centre of Oral Health, School of Health Sciences, Jönköping University, Jönköping, Sweden
- CHILD Research Group, SIDR, Jönköping University, Jönköping, Sweden
| | - J. Norderyd
- CHILD Research Group, SIDR, Jönköping University, Jönköping, Sweden
- National Oral Disability Centre for Rare Disorders, The Institute for Postgraduate Dental Education, Jönköping, Sweden
| | - M. Van Riper
- School of Nursing, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - L. Marks
- Centre of Special Care in Dentistry, Ghent University Hospital, Gent, Belgium
| | - M. Björk
- CHILD Research Group, SIDR, Jönköping University, Jönköping, Sweden
- Department of Nursing Science, School of Health Sciences, Jönköping University, Jönköping, Sweden
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Bergström M, Dahlström Ö, Thyberg I, Björk M. The role of support from significant others in the association between disease-related factors and sickness absence in early rheumatoid arthritis: a longitudinal study. Scand J Rheumatol 2021; 50:427-434. [PMID: 33678129 DOI: 10.1080/03009742.2020.1870712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Objective: The aim of this study was to analyse how support from significant others affects the associations between disease-related variables and sickness absence during the first 2 years after rheumatoid arthritis (RA) diagnosis.Method: Data from 274 people with RA (73% women) of working age (18-63 years) were retrieved from the Swedish early RA cohort TIRA-2. These data concerned disease-related variables (disease activity, activity limitations, pain intensity, and grip force), sickness absence, and perceived support from significant others. Associations of disease-related variables with sickness absence and how these associations were moderated by support from significant others were analysed using zero-inflated negative binomial regression.Results: During the 2 years after diagnosis, higher disease activity was significantly associated with increased odds of sickness absence, a connection strengthened by perceived support from family during the first year. More perceived support was also directly and significantly associated with increased odds of sickness absence during the first year.Conclusions: Support from significant others is related to sickness absence in RA, specifically during the first year after diagnosis. Although patients report high levels of support from significant others, this does not necessarily lead to more positive work outcomes. Therefore, it is important to consider other aspects of support that might influence work outcomes, e.g. type and quality of support. Future research should investigate these forms of support, and when significant others should be encouraged to support in the rehabilitation process to increase the chances of people with RA having a well-functioning and sustainable work life.
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Affiliation(s)
- M Bergström
- Unit of Occupational Therapy, Department of Health, Medicine and Caring Sciences, Faculty of Health Sciences, Linköping University, Norrköping, Sweden
| | - Ö Dahlström
- Department of Behavioural Sciences and Learning, Faculty of Arts and Sciences, Linköping University, Linköping, Sweden
| | - I Thyberg
- Department of Rheumatology in Östergötland, and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - M Björk
- Unit of Occupational Therapy, Department of Health, Medicine and Caring Sciences, Faculty of Health Sciences, Linköping University, Norrköping, Sweden.,Department of Rheumatology in Östergötland, and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
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Dahl M, Bergman S, Björk M, Diaz-Almela E, Granberg M, Gullström M, Leiva-Dueñas C, Magnusson K, Marco-Méndez C, Piñeiro-Juncal N, Mateo MÁ. A temporal record of microplastic pollution in Mediterranean seagrass soils. Environ Pollut 2021; 273:116451. [PMID: 33486243 DOI: 10.1016/j.envpol.2021.116451] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 01/05/2021] [Accepted: 01/05/2021] [Indexed: 06/12/2023]
Abstract
Plastic pollution is emerging as a potential threat to the marine environment. In the current study, we selected seagrass meadows, known to efficiently trap organic and inorganic particles, to investigate the concentrations and dynamics of microplastics in their soil. We assessed microplastic contamination and accumulation in 210Pb dated soil cores collected in Posidonia oceanica meadows at three locations along the Spanish Mediterranean coast, with two sites located in the Almería region (Agua Amarga and Roquetas) and one at Cabrera Island (Santa Maria). Almería is known for its intense agricultural industry with 30 000 ha of plastic-covered greenhouses, while the Cabrera Island is situated far from urban areas. Microplastics were extracted using enzymatic digestion and density separation. The particles were characterized by visual identification and with Fourier-transformed infrared (FTIR) spectroscopy, and related to soil age-depth chronologies. Our findings showed that the microplastic contamination and accumulation was negligible until the mid-1970s, after which plastic particles increased dramatically, with the highest concentrations of microplastic particles (MPP) found in the recent (since 2012) surface soil of Agua Amarga (3819 MPP kg-1), followed by the top-most layers of the soil of the meadows in Roquetas (2173 kg-1) and Santa Maria (68-362 kg-1). The highest accumulation rate was seen in the Roquetas site (8832 MPP m-2 yr-1). The increase in microplastics in the seagrass soil was associated to land-use change following the intensification of the agricultural industry in the area, with a clear relationship between the development of the greenhouse industry in Almería and the concentration of microplastics in the historical soil record. This study shows a direct linkage between intense anthropogenic activity, an extensive use of plastics and high plastic contamination in coastal marine ecosystems such as seagrass meadows. We highlight the need of proper waste management to protect the coastal environment from continuous pollution.
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Affiliation(s)
- Martin Dahl
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
| | - Sanne Bergman
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Mats Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Elena Diaz-Almela
- Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones Científicas, Blanes, Spain
| | - Maria Granberg
- IVL, Swedish Environmental Research Institute, Kristineberg Marine Research Station, Fiskebäckskil, Sweden
| | - Martin Gullström
- School of Natural Sciences, Technology and Environmental Studies, Södertörn University, Huddinge, Sweden
| | - Carmen Leiva-Dueñas
- Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones Científicas, Blanes, Spain
| | - Kerstin Magnusson
- IVL, Swedish Environmental Research Institute, Kristineberg Marine Research Station, Fiskebäckskil, Sweden
| | - Candela Marco-Méndez
- Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones Científicas, Blanes, Spain
| | - Nerea Piñeiro-Juncal
- Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones Científicas, Blanes, Spain; EcoPast (GI-1553), Departamento de Edafoloxía e Química Agrícola, Facultade de Bioloxía, Universidade de 5 Santiago de Compostela, Santiago de Compostela, A Coruña, Spain
| | - Miguel Ángel Mateo
- Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones Científicas, Blanes, Spain; Centre for Marine Ecosystems Research. School of Science, Edith Cowan University, Joondalup, WA, Australia
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10
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Björk M, Bergström M, Sverker A, Brodin N. Measures of Participation in Persons With Musculoskeletal Conditions. Arthritis Care Res (Hoboken) 2020; 72 Suppl 10:486-498. [PMID: 33091247 DOI: 10.1002/acr.24226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 04/14/2020] [Indexed: 11/07/2022]
Affiliation(s)
- M Björk
- Linköping University, Linköping, Sweden
| | - M Bergström
- Linköping University, Norrköping Campus, Norrköping, Sweden
| | - A Sverker
- Linköping University, Linköping, Sweden
| | - N Brodin
- Karolinska Institutet, Huddinge, Sweden, and Danderyd Hospital, Stockholm, Sweden
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11
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Dahl M, Asplund ME, Björk M, Deyanova D, Infantes E, Isaeus M, Nyström Sandman A, Gullström M. The influence of hydrodynamic exposure on carbon storage and nutrient retention in eelgrass (Zostera marina L.) meadows on the Swedish Skagerrak coast. Sci Rep 2020; 10:13666. [PMID: 32788660 PMCID: PMC7423977 DOI: 10.1038/s41598-020-70403-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/14/2020] [Indexed: 12/03/2022] Open
Abstract
Cold-temperate seagrass (Zostera marina) meadows provide several important ecosystem services, including trapping and storage of sedimentary organic carbon and nutrients. However, seagrass meadows are rapidly decreasing worldwide and there is a pressing need for protective management of the meadows and the organic matter sinks they create. Their carbon and nutrient storage potential must be properly evaluated, both at present situation and under future climate change impacts. In this study, we assessed the effect of wave exposure on sedimentary carbon and nitrogen accumulation using existing data from 53 Z. marina meadows at the Swedish west coast. We found that meadows with higher hydrodynamic exposure had larger absolute organic carbon and nitrogen stocks (at 0-25 cm depth). This can be explained by a hydrodynamically induced sediment compaction in more exposed sites, resulting in increased sediment density and higher accumulation (per unit volume) of sedimentary organic carbon and nitrogen. With higher sediment density, the erosion threshold is assumed to increase, and as climate change-induced storms are predicted to be more common, we suggest that wave exposed meadows can be more resilient toward storms and might therefore be even more important as carbon- and nutrient sinks in the future.
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Affiliation(s)
- Martin Dahl
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
| | - Maria E Asplund
- Department of Marine Sciences, University of Gothenburg, Kristineberg, Fiskebäckskil, Gothenburg, Sweden
| | - Mats Björk
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Diana Deyanova
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
- Department of Biological and Environmental Sciences, University of Gothenburg, Kristineberg, Fiskebäckskil, Gothenburg, Sweden
| | - Eduardo Infantes
- Department of Marine Sciences, University of Gothenburg, Kristineberg, Fiskebäckskil, Gothenburg, Sweden
- Norwegian Institute for Water Research (NIVA), Oslo, Norway
| | | | | | - Martin Gullström
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
- Department of Biological and Environmental Sciences, University of Gothenburg, Kristineberg, Fiskebäckskil, Gothenburg, Sweden
- School of Natural Sciences, Technology and Environmental Studies, Södertörn University, Huddinge, Stockholm, Sweden
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12
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Kalokora OJ, Buriyo AS, Asplund ME, Gullström M, Mtolera MSP, Björk M. An experimental assessment of algal calcification as a potential source of atmospheric CO2. PLoS One 2020; 15:e0231971. [PMID: 32348324 PMCID: PMC7190104 DOI: 10.1371/journal.pone.0231971] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 04/03/2020] [Indexed: 11/19/2022] Open
Abstract
Marine vegetated ecosystems such as seagrass meadows are increasingly acknowledged as important carbon sinks based on their ability to capture and store atmospheric carbon dioxide, thereby contributing to climate change mitigation. Most studies on carbon storage in marine ecosystems have focused on organic carbon, leaving inorganic carbon processes such as calcification unaccounted for, despite of their critical role in the global carbon budget. This is probably because of uncertainties regarding the role of calcification in marine carbon budgets as either atmospheric CO2 source or sink. Here, we conducted a laboratory experiment to investigate the influence of a calcifying alga (Corallina officinalis L.) on seawater carbon content, using a non-calcifying alga (Ulva lactuca L.) as a control. In a first part, algae were incubated separately while measuring changes in seawater pH, total alkalinity (TA) and total dissolved inorganic carbon (DIC). The amount of carbon used in photosynthetic uptake and production of CaCO3 was then calculated. In a second, directly following, part the algae were removed and DIC levels were allowed to equilibrate with air until the pH stabilized and the loss of CO2 to air was calculated as the difference in total DIC from the start of part one, to the end of the second part. The results showed that C. officinalis caused a significant and persistent reduction in total dissolved inorganic carbon (DIC), TA and seawater pH, while no such permanent changes were caused by U. lactuca. These findings indicate that calcification can release a significant amount of CO2 to the atmosphere and thereby possibly counteract the carbon sequestration in marine vegetated ecosystems if this CO2 is not re-fixed in the system. Our research emphasises the importance of considering algal calcification in future assessments on carbon storage in coastal areas.
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Affiliation(s)
- Olivia J. Kalokora
- Dar es Salaam University College of Education (DUCE), Dar es Salaam, Tanzania
- Department of Botany, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Amelia S. Buriyo
- Department of Botany, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Maria E. Asplund
- Department of Marine Sciences, University of Gothenburg, Kristineberg, Fiskebäckskil, Sweden
| | - Martin Gullström
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
- Department of Biological and Environmental Sciences, University of Gothenburg, Kristineberg, Fiskebäckskil, Sweden
| | | | - Mats Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
- * E-mail:
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13
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George R, Gullström M, Mtolera MSP, Lyimo TJ, Björk M. Methane emission and sulfide levels increase in tropical seagrass sediments during temperature stress: A mesocosm experiment. Ecol Evol 2020; 10:1917-1928. [PMID: 32128125 PMCID: PMC7042687 DOI: 10.1002/ece3.6009] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 12/18/2019] [Accepted: 12/23/2019] [Indexed: 11/11/2022] Open
Abstract
Climate change-induced ocean warming is expected to greatly affect carbon dynamics and sequestration in vegetated shallow waters, especially in the upper subtidal where water temperatures may fluctuate considerably and can reach high levels at low tides. This might alter the greenhouse gas balance and significantly reduce the carbon sink potential of tropical seagrass meadows. In order to assess such consequences, we simulated temperature stress during low tide exposures by subjecting seagrass plants (Thalassia hemprichii) and associated sediments to elevated midday temperature spikes (31, 35, 37, 40, and 45°C) for seven consecutive days in an outdoor mesocosm setup. During the experiment, methane release from the sediment surface was estimated using gas chromatography. Sulfide concentration in the sediment pore water was determined spectrophotometrically, and the plant's photosynthetic capacity as electron transport rate (ETR), and maximum quantum yield (Fv/Fm) was assessed using pulse amplitude modulated (PAM) fluorometry. The highest temperature treatments (40 and 45°C) had a clear positive effect on methane emission and the level of sulfide in the sediment and, at the same time, clear negative effects on the photosynthetic performance of seagrass plants. The effects observed by temperature stress were immediate (within hours) and seen in all response variables, including ETR, Fv/Fm, methane emission, and sulfide levels. In addition, both the methane emission and the size of the sulfide pool were already negatively correlated with changes in the photosynthetic rate (ETR) during the first day, and with time, the correlations became stronger. These findings show that increased temperature will reduce primary productivity and increase methane and sulfide levels. Future increases in the frequency and severity of extreme temperature events could hence reduce the climate mitigation capacity of tropical seagrass meadows by reducing CO2 sequestration, increase damage from sulfide toxicity, and induce the release of larger amounts of methane.
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Affiliation(s)
- Rushingisha George
- Department of Ecology, Environment and Plant SciencesSeagrass Ecology and Physiology groupStockholm UniversityStockholmSweden
- Tanzania Fisheries Research Institute (TAFIRI)Dar es SalaamTanzania
| | - Martin Gullström
- Department of Ecology, Environment and Plant SciencesSeagrass Ecology and Physiology groupStockholm UniversityStockholmSweden
- Department of Biological and Environmental SciencesUniversity of GothenburgKristineberg, FiskebäckskilSweden
| | | | - Thomas J. Lyimo
- Department of Molecular Science and BiotechnologyUniversity of Dar es SalaamDar es SalaamTanzania
| | - Mats Björk
- Department of Ecology, Environment and Plant SciencesSeagrass Ecology and Physiology groupStockholm UniversityStockholmSweden
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14
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Perry D, Staveley T, Deyanova D, Baden S, Dupont S, Hernroth B, Wood H, Björk M, Gullström M. Global environmental changes negatively impact temperate seagrass ecosystems. Ecosphere 2019. [DOI: 10.1002/ecs2.2986] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Diana Perry
- Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
- Department of Aquatic Resources Swedish University of Agricultural Sciences Lysekil Sweden
| | - Thomas Staveley
- Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
- AquaBiota Water Research Stockholm Sweden
| | - Diana Deyanova
- Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
- Department of Biological and Environmental Sciences University of Gothenburg Kristineberg Fiskebäckskil Sweden
| | - Susanne Baden
- Department of Biological and Environmental Sciences University of Gothenburg Kristineberg Fiskebäckskil Sweden
| | - Sam Dupont
- Department of Biological and Environmental Sciences University of Gothenburg Kristineberg Fiskebäckskil Sweden
| | - Bodil Hernroth
- The Royal Swedish Academy of Sciences Kristineberg Fiskebäckskil Sweden
- Department of Natural Science Kristianstad University Kristianstad Sweden
| | - Hannah Wood
- Department of Biological and Environmental Sciences University of Gothenburg Kristineberg Fiskebäckskil Sweden
| | - Mats Björk
- Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
| | - Martin Gullström
- Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
- Department of Biological and Environmental Sciences University of Gothenburg Kristineberg Fiskebäckskil Sweden
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15
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Nascimento FJA, Dahl M, Deyanova D, Lyimo LD, Bik HM, Schuelke T, Pereira TJ, Björk M, Creer S, Gullström M. Above-below surface interactions mediate effects of seagrass disturbance on meiobenthic diversity, nematode and polychaete trophic structure. Commun Biol 2019; 2:362. [PMID: 31602411 PMCID: PMC6778119 DOI: 10.1038/s42003-019-0610-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 09/12/2019] [Indexed: 11/08/2022] Open
Abstract
Ecological interactions between aquatic plants and sediment communities can shape the structure and function of natural systems. Currently, we do not fully understand how seagrass habitat degradation impacts the biodiversity of belowground sediment communities. Here, we evaluated indirect effects of disturbance of seagrass meadows on meiobenthic community composition, with a five-month in situ experiment in a tropical seagrass meadow. Disturbance was created by reducing light availability (two levels of shading), and by mimicking grazing events (two levels) to assess impacts on meiobenthic diversity using high-throughput sequencing of 18S rRNA amplicons. Both shading and simulated grazing had an effect on meiobenthic community structure, mediated by seagrass-associated biotic drivers and sediment abiotic variables. Additionally, shading substantially altered the trophic structure of the nematode community. Our findings show that degradation of seagrass meadows can alter benthic community structure in coastal areas with potential impacts to ecosystem functions mediated by meiobenthos in marine sediments.
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Affiliation(s)
| | - Martin Dahl
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Diana Deyanova
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Liberatus D. Lyimo
- School of Biological Sciences, University of Dodoma, Box 338, Dodoma, Tanzania
| | - Holly M. Bik
- Department of Nematology, University of California—Riverside, 900 University Avenue, Riverside, CA 92521 USA
| | - Taruna Schuelke
- Department of Nematology, University of California—Riverside, 900 University Avenue, Riverside, CA 92521 USA
| | - Tiago José Pereira
- Department of Nematology, University of California—Riverside, 900 University Avenue, Riverside, CA 92521 USA
| | - Mats Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Simon Creer
- Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University, Bangor, LL57 2UW UK
| | - Martin Gullström
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
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16
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Rasmusson LM, Gullström M, Gunnarsson PCB, George R, Björk M. Estimation of a whole plant Q10 to assess seagrass productivity during temperature shifts. Sci Rep 2019; 9:12667. [PMID: 31477782 PMCID: PMC6718688 DOI: 10.1038/s41598-019-49184-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 08/20/2019] [Indexed: 11/10/2022] Open
Abstract
Through respiration and photosynthesis, seagrass meadows contribute greatly to carbon and oxygen fluxes in shallow coastal waters. There is increasing concern about how shallow-water primary producers will react to a near-future climate scenario with increased temperature variation. When modelling primary productivity under high temperature variability, Q10 values are commonly used to predict rate changes depending on biophysical factors. Q10 values are often assumed to be constant and around 2.0 (i.e. a doubling of the rate with a temperature increase of 10 °C). We aimed to establish how the gas exchange of seagrass (Zostera marina) tissues at various maturity stages would respond over a broad range of temperatures. Seagrass shoot maturity stage clearly affected respiration and apparent photosynthesis, and the Q10 results indicated a skewed balance between the two processes, with a higher photosynthetic Q10 during periods of elevated temperatures. When estimating whole-plant Q10 in a realistic maximal temperature range, we found that the overall response of a seagrass plant's net O2 exchange balance can be as much as three to four times higher than under ambient temperatures. Our findings indicate that plant tissue age and temperature should be considered when assessing and modelling carbon and oxygen fluctuations in vegetated coastal areas.
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Affiliation(s)
- Lina M Rasmusson
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.,Regional Climate Group, Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Martin Gullström
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.,Department of Biological and Environmental Sciences, University of Gothenburg, Kristineberg, Fiskebäckskil, Sweden
| | - Pontus C B Gunnarsson
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Rushingisha George
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.,Tanzania Fisheries Research Institute (TAFIRI), Dar es Salaam, Tanzania
| | - Mats Björk
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
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17
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Lyimo LD, Gullström M, Lyimo TJ, Deyanova D, Dahl M, Hamisi MI, Björk M. Shading and simulated grazing increase the sulphide pool and methane emission in a tropical seagrass meadow. Mar Pollut Bull 2018; 134:89-93. [PMID: 28935361 DOI: 10.1016/j.marpolbul.2017.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/31/2017] [Accepted: 09/02/2017] [Indexed: 06/07/2023]
Abstract
Though seagrass meadows are among the most productive habitats in the world, contributing substantially to long-term carbon storage, studies of the effects of critical disturbances on the fate of carbon sequestered in the sediment and biomass of these meadows are scarce. In a manipulative in situ experiment, we studied the effects of successive loss of seagrass biomass as a result of shading and simulated grazing at two intensity levels on sulphide (H2S) content and methane (CH4) emission in a tropical seagrass meadow in Zanzibar (Tanzania). In all disturbed treatments, we found a several-fold increase in both the sulphide concentration of the sediment pore-water and the methane emissions from the sediment surface (except for CH4 emissions in the low-shading treatment). This could be due to the ongoing degradation of belowground biomass shed by the seagrass plants, supporting the production of both sulphate-reducing bacteria and methanogens, possibly exacerbated by the loss of downwards oxygen transport via seagrass plants. The worldwide rapid loss of seagrass areas due to anthropogenic activities may therefore have significant effects on carbon sink-source relationships within coastal seas.
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Affiliation(s)
- Liberatus D Lyimo
- Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden; School of Biological Science, University of Dodoma, P.O. Box 338, Dodoma, Tanzania
| | - Martin Gullström
- Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden.
| | - Thomas J Lyimo
- Department of Molecular Biology and Biotechnology, University of Dar es Salaam, P.O. Box 35060, Dar es Salaam, Tanzania
| | - Diana Deyanova
- Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Martin Dahl
- Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Mariam I Hamisi
- School of Biological Science, University of Dodoma, P.O. Box 338, Dodoma, Tanzania
| | - Mats Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
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18
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George R, Gullström M, Mangora MM, Mtolera MSP, Björk M. High midday temperature stress has stronger effects on biomass than on photosynthesis: A mesocosm experiment on four tropical seagrass species. Ecol Evol 2018; 8:4508-4517. [PMID: 29760891 PMCID: PMC5938440 DOI: 10.1002/ece3.3952] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 01/19/2018] [Accepted: 01/27/2018] [Indexed: 11/24/2022] Open
Abstract
The effect of repeated midday temperature stress on the photosynthetic performance and biomass production of seagrass was studied in a mesocosm setup with four common tropical species, including Thalassia hemprichii, Cymodocea serrulata, Enhalus acoroides, and Thalassodendron ciliatum. To mimic natural conditions during low tides, the plants were exposed to temperature spikes of different maximal temperatures, that is, ambient (29–33°C), 34, 36, 40, and 45°C, during three midday hours for seven consecutive days. At temperatures of up to 36°C, all species could maintain full photosynthetic rates (measured as the electron transport rate, ETR) throughout the experiment without displaying any obvious photosynthetic stress responses (measured as declining maximal quantum yield, Fv/Fm). All species except T. ciliatum could also withstand 40°C, and only at 45°C did all species display significantly lower photosynthetic rates and declining Fv/Fm. Biomass estimation, however, revealed a different pattern, where significant losses of both above‐ and belowground seagrass biomass occurred in all species at both 40 and 45°C (except for C. serrulata in the 40°C treatment). Biomass losses were clearly higher in the shoots than in the belowground root–rhizome complex. The findings indicate that, although tropical seagrasses presently can cope with high midday temperature stress, a few degrees increase in maximum daily temperature could cause significant losses in seagrass biomass and productivity.
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Affiliation(s)
- Rushingisha George
- Seagrass Ecology and Physiology Research Group Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden.,Tanzania Fisheries Research Institute (TAFIRI) Dar es Salaam Tanzania
| | - Martin Gullström
- Seagrass Ecology and Physiology Research Group Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
| | | | | | - Mats Björk
- Seagrass Ecology and Physiology Research Group Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
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19
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Deyanova D, Gullström M, Lyimo LD, Dahl M, Hamisi MI, Mtolera MSP, Björk M. Contribution of seagrass plants to CO2 capture in a tropical seagrass meadow under experimental disturbance. PLoS One 2017; 12:e0181386. [PMID: 28704565 PMCID: PMC5509355 DOI: 10.1371/journal.pone.0181386] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 06/19/2017] [Indexed: 11/19/2022] Open
Abstract
Coastal vegetative habitats are known to be highly productive environments with a high ability to capture and store carbon. During disturbance this important function could be compromised as plant photosynthetic capacity, biomass, and/or growth are reduced. To evaluate effects of disturbance on CO2 capture in plants we performed a five-month manipulative experiment in a tropical seagrass (Thalassia hemprichii) meadow exposed to two intensity levels of shading and simulated grazing. We assessed CO2 capture potential (as net CO2 fixation) using areal productivity calculated from continuous measurements of diel photosynthetic rates, and estimates of plant morphology, biomass and productivity/respiration (P/R) ratios (from the literature). To better understand the plant capacity to coping with level of disturbance we also measured plant growth and resource allocation. We observed substantial reductions in seagrass areal productivity, biomass, and leaf area that together resulted in a negative daily carbon balance in the two shading treatments as well as in the high-intensity simulated grazing treatment. Additionally, based on the concentrations of soluble carbohydrates and starch in the rhizomes, we found that the main reserve sources for plant growth were reduced in all treatments except for the low-intensity simulated grazing treatment. If permanent, these combined adverse effects will reduce the plants' resilience and capacity to recover after disturbance. This might in turn have long-lasting and devastating effects on important ecosystem functions, including the carbon sequestration capacity of the seagrass system.
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Affiliation(s)
- Diana Deyanova
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Martin Gullström
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | | | - Martin Dahl
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Mariam I. Hamisi
- College of Natural and Mathematical Sciences, University of Dodoma, Dodoma, Tanzania
| | | | - Mats Björk
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
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20
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Gullström M, Lyimo LD, Dahl M, Samuelsson GS, Eggertsen M, Anderberg E, Rasmusson LM, Linderholm HW, Knudby A, Bandeira S, Nordlund LM, Björk M. Blue Carbon Storage in Tropical Seagrass Meadows Relates to Carbonate Stock Dynamics, Plant–Sediment Processes, and Landscape Context: Insights from the Western Indian Ocean. Ecosystems 2017. [DOI: 10.1007/s10021-017-0170-8] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Rasmusson LM, Lauritano C, Procaccini G, Gullström M, Buapet P, Björk M. Respiratory oxygen consumption in the seagrass Zostera marina varies on a diel basis and is partly affected by light. Mar Biol 2017; 164:140. [PMID: 28596620 PMCID: PMC5446554 DOI: 10.1007/s00227-017-3168-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 05/17/2017] [Indexed: 06/07/2023]
Abstract
The seagrass Zostera marina is an important marine ecosystem engineer, greatly influencing oxygen and carbon fluctuations in temperate coastal areas. Although photosynthetically driven gas fluxes are well studied, the impact of the plant's mitochondrial respiration on overall CO2 and O2 fluxes in marine vegetated areas is not yet understood. Likewise, the gene expression in relation to the respiratory pathway has not been well analyzed in seagrasses. This study uses a combined approach, studying respiratory oxygen consumption rates in darkness simultaneously with changes in gene expression, with the aim of examining how respiratory oxygen consumption fluctuates on a diel basis. Measurements were first made in a field study where samples were taken directly from the ocean to the laboratory for estimations of respiratory rates. This was followed by a laboratory study where measurements of respiration and expression of genes known to be involved in mitochondrial respiration were conducted for 5 days under light conditions mimicking natural summer light (i.e., 15 h of light and 9 h of darkness), followed by 3 days of constant darkness to detect the presence of a potential circadian clock. In the field study, there was a clear diel variation in respiratory oxygen consumption with the highest rates in the late evening and at night (0.766 and 0.869 µmol O2 m-2 s-1, respectively). These repetitive diel patterns were not seen in the laboratory, where water conditions (temperature, pH, and oxygen) showed minor fluctuations and only light varied. The gene expression analysis did not give clear evidence on drivers behind the respiratory fluxes; however, expression levels of the selected genes generally increased when the seagrass was kept in constant darkness. While light may influence mitochondrial respiratory fluxes, it appears that other environmental factors (e.g., temperature, pH, or oxygen) could be of significance too. As seagrasses substantially alter the proportions of both oxygen and inorganic carbon in the water column and respiration is a great driver of these alterations, we propose that acknowledging the presence of respiratory fluctuations in nature should be considered when estimating coastal carbon budgets. As dark respiration in field at midnight was approximately doubled from that of midday, great over-, or underestimations of the respiratory carbon dioxide release from seagrasses could be made if values are just obtained at one specific time point and considered constant.
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Affiliation(s)
- Lina M. Rasmusson
- Seagrass Ecology and Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Chiara Lauritano
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy
| | - Gabriele Procaccini
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy
| | - Martin Gullström
- Seagrass Ecology and Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Pimchanok Buapet
- Seagrass Ecology and Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
- Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112 Thailand
| | - Mats Björk
- Seagrass Ecology and Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
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Dahl M, Deyanova D, Gütschow S, Asplund ME, Lyimo LD, Karamfilov V, Santos R, Björk M, Gullström M. Sediment Properties as Important Predictors of Carbon Storage in Zostera marina Meadows: A Comparison of Four European Areas. PLoS One 2016; 11:e0167493. [PMID: 27936111 PMCID: PMC5147920 DOI: 10.1371/journal.pone.0167493] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 11/15/2016] [Indexed: 11/18/2022] Open
Abstract
Seagrass ecosystems are important natural carbon sinks but their efficiency varies greatly depending on species composition and environmental conditions. What causes this variation is not fully known and could have important implications for management and protection of the seagrass habitat to continue to act as a natural carbon sink. Here, we assessed sedimentary organic carbon in Zostera marina meadows (and adjacent unvegetated sediment) in four distinct areas of Europe (Gullmar Fjord on the Swedish Skagerrak coast, Askö in the Baltic Sea, Sozopol in the Black Sea and Ria Formosa in southern Portugal) down to ~35 cm depth. We also tested how sedimentary organic carbon in Z. marina meadows relates to different sediment characteristics, a range of seagrass-associated variables and water depth. The seagrass carbon storage varied greatly among areas, with an average organic carbon content ranging from 2.79 ± 0.50% in the Gullmar Fjord to 0.17 ± 0.02% in the area of Sozopol. We found that a high proportion of fine grain size, high porosity and low density of the sediment is strongly related to high carbon content in Z. marina sediment. We suggest that sediment properties should be included as an important factor when evaluating high priority areas in management of Z. marina generated carbon sinks.
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Affiliation(s)
- Martin Dahl
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
- * E-mail:
| | - Diana Deyanova
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Silvia Gütschow
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Maria E. Asplund
- The Sven Lovén Center for Marine Sciences, University of Gothenburg, Fiskebäckskil, Sweden
| | - Liberatus D. Lyimo
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
- School of Biological Science, University of Dodoma, Dodoma, Tanzania
| | - Ventzislav Karamfilov
- Institute for Biodiversity and Ecosystem Research at the Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Rui Santos
- ALGAE -Marine Ecology Research Group, CCMar - Center of Marine Sciences, University of Algarve, Faro, Portugal
| | - Mats Björk
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Martin Gullström
- Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
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Buapet P, Björk M. The role of O2 as an electron acceptor alternative to CO2 in photosynthesis of the common marine angiosperm Zostera marina L. Photosynth Res 2016; 129:59-69. [PMID: 27125819 DOI: 10.1007/s11120-016-0268-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Accepted: 04/19/2016] [Indexed: 06/05/2023]
Abstract
This study investigates the role of O2 as an electron acceptor alternative to CO2 in photosynthesis of the common marine angiosperm Zostera marina L. Electron transport rates (ETRs) and non-photochemical quenching (NPQ) of Z. marina were measured under saturating irradiance in synthetic seawater containing 2.2 mM DIC and no DIC with different O2 levels (air-equilibrated levels, 3 % of air equilibrium and restored air-equilibrated levels). Lowering O2 did not affect ETR when DIC was provided, while it caused a decrease in ETR and an increase in NPQ in DIC-free media, indicating that O2 acted as an alternative electron acceptor under low DIC. The ETR and NPQ as a function of irradiance were subsequently assessed in synthetic seawater containing (1) 2.2 mM DIC, air-equilibrated O2; (2) saturating CO2, no O2; and (3) no DIC, air-equilibrated O2. These treatments were combined with glycolaldehyde pre-incubation. Glycolaldehyde caused a marked decrease in ETR in DIC-free medium, indicating significant electron flow supported by photorespiration. Combining glycolaldehyde with O2 depletion completely suppressed ETR suggesting the operation of the Mehler reaction, a possibility supported by the photosynthesis-dependent superoxide production. However, no notable effect of suppressing the Mehler reaction on NPQ was observed. It is concluded that during DIC-limiting conditions, such as those frequently occurring in the habitats of Z. marina, captured light energy exceeds what is utilised for the assimilation of available carbon, and photorespiration is a major alternative electron acceptor, while the contribution of the Mehler reaction is minor.
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Affiliation(s)
- Pimchanok Buapet
- Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai, 90112, Songkhla, Thailand.
| | - Mats Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, SE-106 91, Sweden
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Björk M. SP0082 Disability in Men and Women with RA. Does It Differ and Does It Matter? Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.6396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Sverker A, Björk M, Thyberg I, Östlund G. SAT0649-HPR Women with Early RA Prefer To Use Interaction and Adjustment Strategies To Deal with Their Everyday Life Dilemmas: The Tira Project). Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
BACKGROUND The aim was to identify differences in self-reported symptoms among working (W) and non-working (NW) women, and to determine the most important biopsychosocial variables in differentiating one group from the other. METHOD A questionnaire was mailed to 524 members of a local chapter of the Swedish Rheumatology Association. A total of 362 persons responded (69%); 96% of which were women. Women older than 64 years and all men were excluded. The final study group consisted of 95 W, and 227 NW women. The questionnaire included data on demographics, employment, support, exercise, daily activities and symptoms. Data were analysed using univariate statistics and a partial least squares discriminant analysis (PLS-DA). RESULTS The results showed that 41% of the W and 42% of the NW women were/had been employed in service,care or business. The NW women reported a significantly higher severity of symptoms compared with the W women. The most important variable when differentiating the W from the NW women was social support from colleagues and employers. CONCLUSION To change prevailing attitudes and values towards persons with a work disability, a process of active intervention involving staff is needed. Educating employers as to how a disability may influence a work situation, and the importance of social support, can be improved.
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Affiliation(s)
- G M Liedberg And
- Department of Social and Welfare Studies, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - M Björk
- Department of Rehabilitation, School of Health Sciences, Jönköping University, Jönköping, Sweden
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Björk M, Thyberg I, Lindstrand J, Bodin N, Rosengren J, Nordenskiöld U, Brorsson S. SAT0636-HPR Development of Measuring Devices for Evaluating Hand Force in Rheumatoid Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ostlund G, Björk M, Thyberg I, Valtersson E, Sverker A. AB1221-HPR Adjustment, Avoidance, Interaction, and Acceptance Strategies Where Used by Men with Participation Restrictions Due to Early RA. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Thyberg I, Arvidsson P, Thyberg M, Björk M, Dahlström Ö. OP0230-HPR Increased Health Related Quality of Life in Early Ra Today Compared to Patients Diagnosed During the 1990's. The Swedish TIRA Project. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Björk M. SP0154 ”Social Participation is Important to Me”; The Experience of Adults with Rheumatoid Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.6639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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31
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Darcy L, Enskär K, Granlund M, Simeonsson RJ, Peterson C, Björk M. Health and functioning in the everyday lives of young children with cancer: documenting with the International Classification of Functioning, Disability and Health--Children and Youth (ICF-CY). Child Care Health Dev 2015; 41:475-82. [PMID: 25219405 DOI: 10.1111/cch.12191] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/20/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND Health care focus is shifting for children from surviving childhood cancer to living with it on a daily basis. There is a need to document health and function in the everyday lives of young children with cancer using the multidimensional framework and language of the International Classification of Functioning, Disability and Health--Children and Youth (ICF-CY). AIMS The aims of this study were (1) to document health and functioning in the everyday lives of young children with cancer using ICF-CY codes and (2) to identify a comprehensive code set that can aid clinical assessment. METHOD Interviews with children diagnosed with cancer and their parents, were transcribed, reviewed for content and coded to the ICF-CY using linking procedures. RESULTS A comprehensive code set (n = 70) for childhood cancer was identified. The majority of content identified to codes was related to activity and participation describing social relations with family, peers and professionals, preschool attendance and play, as well as issues related to support and independence. CONCLUSIONS The ICF-CY can be used to document the nature and range of characteristics and consequences of cancer experienced by children. The identified comprehensive code set could be helpful to health care professionals, parents and teachers in assessing and supporting young children's health and everyday life through the cancer trajectory. The comprehensive code set could be developed as a clinical assessment tool for those caring for young children with cancer. The universal language of the ICF-CY means that the utility of a clinical assessment tool based on identified codes can have wide reaching effects for the care of young children with cancer.
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Affiliation(s)
- L Darcy
- CHILD Research Group, School of Health Sciences, Jönköping University, Jönköping, Sweden; School of Health Sciences, University College Borås, Borås, Sweden
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Ahlstrand I, Thyberg I, Falkmer T, Dahlström Ö, Björk M. Pain and activity limitations in women and men with contemporary treated early RA compared to 10 years ago: the Swedish TIRA project. Scand J Rheumatol 2015; 44:259-64. [PMID: 25786818 DOI: 10.3109/03009742.2014.997285] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVES To study differences regarding pain and activity limitations during the 3 years following diagnosis in women and men with contemporary treated early RA compared with their counterparts who were diagnosed 10 years earlier. METHOD This study was based on patients recruited to the Early Intervention in RA (TIRA) project. In the first cohort (TIRA-1) 320 patients were included in time for diagnosis during 1996-1998 and 463 patients were included in the second cohort (TIRA-2) during 2006-2009. Disease activity, pain intensity (Visual Analogue Scale, VAS), bodily pain (BP) in the 36-item Short Form Health Survey (SF-36), activity limitations (Health Assessment Questionnaire, HAQ), and medication were reported at inclusion and at follow-up after 1, 2, and 3 years. RESULTS Disease activity, pain, and activity limitations were pronounced at inclusion across both genders and in both cohorts, with some improvement observed during the first year after diagnosis. Disease activity did not differ between cohorts at inclusion but was significantly lower at the follow-ups in the TIRA-2 cohort, in which the patients were prescribed traditional disease-modifying anti-rheumatic drugs (DMARDs) and biological agents more frequently. In TIRA-2, patients reported significantly lower pain and activity limitations at all follow-ups, with men reporting lower pain than women. Women reported significantly higher activity limitations at all time points in TIRA-2. CONCLUSIONS Pain and activity limitations were still pronounced in the contemporary treated early RA cohort compared with their counterparts diagnosed 10 years earlier and both of these factors need to be addressed in clinical settings.
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Affiliation(s)
- I Ahlstrand
- School of Health Sciences, Jönköping University , Jönköping , Sweden
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Ahlstrand I, Thyberg I, Falkmer T, Björk M. OP0209-HPR Less Pain and Activity Limitations in Today's Early RA Patients Compared with Patients Diagnosed 10 Years Earlier (The Swedish Tira-Project). Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ostlund G, Björk M, Valtersson E, Sverker A. AB1157-HPR Intimate Relationships as Perceived by Patients with Early Rheumatoid Arthritis: A Qualitative Interview Study (The Swedish Tira Study). Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sverker A, Björk M, Thyberg I, Thyberg M, Valtersson E, Östlund G. AB1154-HPR Men's Strategies of Handling Participation Restrictions Related to Rheumatoid Arthritis (The Swedish Tira Study). Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Björk M, Thyberg M, Waltersson E, Stenström B, Katz P. SAT0598-HPR Valued Life Activities: Swedish Version (VLA-SWE) with Cultural Adaptation, ICF Linkage and Psychometric Testing. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2013-eular.2322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Buapet P, Rasmusson LM, Gullström M, Björk M. Photorespiration and carbon limitation determine productivity in temperate seagrasses. PLoS One 2013; 8:e83804. [PMID: 24376754 PMCID: PMC3869798 DOI: 10.1371/journal.pone.0083804] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 11/08/2013] [Indexed: 11/19/2022] Open
Abstract
The gross primary productivity of two seagrasses, Zostera marina and Ruppia maritima, and one green macroalga, Ulva intestinalis, was assessed in laboratory and field experiments to determine whether the photorespiratory pathway operates at a substantial level in these macrophytes and to what extent it is enhanced by naturally occurring shifts in dissolved inorganic carbon (DIC) and O2 in dense vegetation. To achieve these conditions in laboratory experiments, seawater was incubated with U. intestinalis in light to obtain a range of higher pH and O2 levels and lower DIC levels. Gross photosynthetic O2 evolution was then measured in this pretreated seawater (pH, 7.8-9.8; high to low DIC:O2 ratio) at both natural and low O2 concentrations (adjusted by N2 bubbling). The presence of photorespiration was indicated by a lower gross O2 evolution rate under natural O2 conditions than when O2 was reduced. In all three macrophytes, gross photosynthetic rates were negatively affected by higher pH and lower DIC. However, while both seagrasses exhibited significant photorespiratory activity at increasing pH values, the macroalga U. intestinalis exhibited no such activity. Rates of seagrass photosynthesis were then assessed in seawater collected from the natural habitats (i.e., shallow bays characterized by high macrophyte cover and by low DIC and high pH during daytime) and compared with open baymouth water conditions (where seawater DIC is in equilibrium with air, normal DIC, and pH). The gross photosynthetic rates of both seagrasses were significantly higher when incubated in the baymouth water, indicating that these grasses can be significantly carbon limited in shallow bays. Photorespiration was also detected in both seagrasses under shallow bay water conditions. Our findings indicate that natural carbon limitations caused by high community photosynthesis can enhance photorespiration and cause a significant decline in seagrass primary production in shallow waters.
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Affiliation(s)
- Pimchanok Buapet
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
- Department of Biology, Prince of Songkla University, Songkhla, Thailand
| | - Lina M. Rasmusson
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Martin Gullström
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Mats Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
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Ahlstrand I, Björk M, Thyberg I, Falkmer T. SAT0595-HPR Low Levels of Pain Impact on Valued Life Activities in Women and Men with Rheumatoid Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Björk M, Skogh T, Husberg M, Thyberg I. OP0010 Reduced Sick Leave in Today’s Early RA Patients Compared to 10 Years Ago, the Swedish Tira Project. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ostlund G, Björk M, Thyberg I, Thyberg M, Waltersson E, Stenström B, Sverker A. THU0583 Emotions Related to Participation Restrictions Experienced by Patients with Early Rheumatoid Arthritis: A Qualitative Interview Study (The Swedish Tira Study). Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Thyberg I, Dahlström Ö, Björk M, Stenström B, Adams J. SAT0576-HPR Hand Pains and General Pain in Women and Men in Early RA, a One Year Follow Up after Diagnosis in the Tira-2 Cohort. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Sverker A, Östlund G, Thyberg M, Waltersson E, Björk M, Thyberg I. FRI0487-HPR Dilemmas of participation in everyday life in early rheumatoid arthritis (RA), a qualitative interview study (the swedish TIRA study). Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ahlstrand I, Björk M, Thyberg I, Börsbo B, Falkmer T. AB1457-HPR “I feel sad when they don’t understand that it hurts so much.”. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.1448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Hjalmarsson Österholm J, Björk M, Håkansson C. AB1458-HPR Factors of importance for maintaining work as perceived by men with arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.1449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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45
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Björk M, Dahlström Ö, Sjöwall C. AB0697 Self-reported health and organ damage predict activity limitations in patients with systemic lupus erythematosus. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Mazzuca S, Björk M, Beer S, Felisberto P, Gobert S, Procaccini G, Runcie J, Silva J, Borges AV, Brunet C, Buapet P, Champenois W, Costa MM, D’Esposito D, Gullström M, Lejeune P, Lepoint G, Olivé I, Rasmusson LM, Richir J, Ruocco M, Serra IA, Spadafora A, Santos R. Establishing research strategies, methodologies and technologies to link genomics and proteomics to seagrass productivity, community metabolism, and ecosystem carbon fluxes. Front Plant Sci 2013; 4:38. [PMID: 23515425 PMCID: PMC3601598 DOI: 10.3389/fpls.2013.00038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 02/12/2013] [Indexed: 05/03/2023]
Abstract
A complete understanding of the mechanistic basis of marine ecosystem functioning is only possible through integrative and interdisciplinary research. This enables the prediction of change and possibly the mitigation of the consequences of anthropogenic impacts. One major aim of the European Cooperation in Science and Technology (COST) Action ES0609 "Seagrasses productivity. From genes to ecosystem management," is the calibration and synthesis of various methods and the development of innovative techniques and protocols for studying seagrass ecosystems. During 10 days, 20 researchers representing a range of disciplines (molecular biology, physiology, botany, ecology, oceanography, and underwater acoustics) gathered at The Station de Recherches Sous-marines et Océanographiques (STARESO, Corsica) to study together the nearby Posidonia oceanica meadow. STARESO is located in an oligotrophic area classified as "pristine site" where environmental disturbances caused by anthropogenic pressure are exceptionally low. The healthy P. oceanica meadow, which grows in front of the research station, colonizes the sea bottom from the surface to 37 m depth. During the study, genomic and proteomic approaches were integrated with ecophysiological and physical approaches with the aim of understanding changes in seagrass productivity and metabolism at different depths and along daily cycles. In this paper we report details on the approaches utilized and we forecast the potential of the data that will come from this synergistic approach not only for P. oceanica but for seagrasses in general.
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Affiliation(s)
- Silvia Mazzuca
- Department of Chemistry and Technology, University of CalabriaRende, Italy
- *Correspondence: Silvia Mazzuca, Department of Chemistry and Technologies building 12 C, Ponte Bucci University of Calabria, 87036 Rende, Italy. e-mail: ; Rui Santos, Marine Plant Ecology (ALGAE), Center of Marine Sciences, University of Algarve Gambelas, 8005-139 Faro, Portugal. e-mail:
| | - M. Björk
- Department of Ecology, Environment and Plant Sciences, Stockholm UniversityStockholm, Sweden
| | - S. Beer
- Department of Plant Sciences, Tel Aviv UniversityTel Aviv, Israel
| | | | - S. Gobert
- Département de Biologie, Ecologie et Evolution, MARE, Université de LiègeLiège, Belgium
| | | | - J. Runcie
- School of Biological Sciences, University of SydneySydney, NSW, Australia
| | - J. Silva
- Marine Plant Ecology (ALGAE), Center of Marine Sciences, University of AlgarveFaro, Portugal
| | - A. V. Borges
- Chemical Oceanography Unit, Université de LiègeLiège, Belgium
| | - C. Brunet
- Stazione Zoologica Anton DohrnNaples, Italy
| | - P. Buapet
- Department of Ecology, Environment and Plant Sciences, Stockholm UniversityStockholm, Sweden
| | - W. Champenois
- Chemical Oceanography Unit, Université de LiègeLiège, Belgium
| | - M. M. Costa
- Marine Plant Ecology (ALGAE), Center of Marine Sciences, University of AlgarveFaro, Portugal
| | | | - M. Gullström
- Department of Ecology, Environment and Plant Sciences, Stockholm UniversityStockholm, Sweden
| | - P. Lejeune
- STARESO SAS, Pointe RevellataCalvi, France
| | - G. Lepoint
- Département de Biologie, Ecologie et Evolution, MARE, Université de LiègeLiège, Belgium
| | - I. Olivé
- Marine Plant Ecology (ALGAE), Center of Marine Sciences, University of AlgarveFaro, Portugal
| | - L. M. Rasmusson
- Department of Ecology, Environment and Plant Sciences, Stockholm UniversityStockholm, Sweden
| | - J. Richir
- Département de Biologie, Ecologie et Evolution, MARE, Université de LiègeLiège, Belgium
| | - M. Ruocco
- Stazione Zoologica Anton DohrnNaples, Italy
| | - I. A. Serra
- Department of Chemistry and Technology, University of CalabriaRende, Italy
| | - A. Spadafora
- Department of Chemistry and Technology, University of CalabriaRende, Italy
| | - Rui Santos
- Marine Plant Ecology (ALGAE), Center of Marine Sciences, University of AlgarveFaro, Portugal
- *Correspondence: Silvia Mazzuca, Department of Chemistry and Technologies building 12 C, Ponte Bucci University of Calabria, 87036 Rende, Italy. e-mail: ; Rui Santos, Marine Plant Ecology (ALGAE), Center of Marine Sciences, University of Algarve Gambelas, 8005-139 Faro, Portugal. e-mail:
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Alexandre A, Silva J, Buapet P, Björk M, Santos R. Effects of CO(2) enrichment on photosynthesis, growth, and nitrogen metabolism of the seagrass Zostera noltii. Ecol Evol 2012; 2:2625-35. [PMID: 23145346 PMCID: PMC3492787 DOI: 10.1002/ece3.333] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 06/19/2012] [Accepted: 06/22/2012] [Indexed: 11/21/2022] Open
Abstract
Seagrass ecosystems are expected to benefit from the global increase in CO(2) in the ocean because the photosynthetic rate of these plants may be C(i)-limited at the current CO(2) level. As well, it is expected that lower external pH will facilitate the nitrate uptake of seagrasses if nitrate is cotransported with H(+) across the membrane as in terrestrial plants. Here, we investigate the effects of CO(2) enrichment on both carbon and nitrogen metabolism of the seagrass Zostera noltii in a mesocosm experiment where plants were exposed for 5 months to two experimental CO(2) concentrations (360 and 700 ppm). Both the maximum photosynthetic rate (P(m)) and photosynthetic efficiency (α) were higher (1.3- and 4.1-fold, respectively) in plants exposed to CO(2)-enriched conditions. On the other hand, no significant effects of CO(2) enrichment on leaf growth rates were observed, probably due to nitrogen limitation as revealed by the low nitrogen content of leaves. The leaf ammonium uptake rate and glutamine synthetase activity were not significantly affected by increased CO(2) concentrations. On the other hand, the leaf nitrate uptake rate of plants exposed to CO(2)-enriched conditions was fourfold lower than the uptake of plants exposed to current CO(2) level, suggesting that in the seagrass Z. noltii nitrate is not cotransported with H(+) as in terrestrial plants. In contrast, the activity of nitrate reductase was threefold higher in plant leaves grown at high-CO(2) concentrations. Our results suggest that the global effects of CO(2) on seagrass production may be spatially heterogeneous and depend on the specific nitrogen availability of each system. Under a CO(2) increase scenario, the natural levels of nutrients will probably become limiting for Z. noltii. This potential limitation becomes more relevant because the expected positive effect of CO(2) increase on nitrate uptake rate was not confirmed.
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Affiliation(s)
- Ana Alexandre
- Marine Plant Ecology Research Group, CCMAR – Centre of Marine Sciences, Universidade do AlgarveFaro, Portugal
| | - João Silva
- Marine Plant Ecology Research Group, CCMAR – Centre of Marine Sciences, Universidade do AlgarveFaro, Portugal
| | | | - Mats Björk
- Botany Department, Stockholm UniversityStockholm, Sweden
| | - Rui Santos
- Marine Plant Ecology Research Group, CCMAR – Centre of Marine Sciences, Universidade do AlgarveFaro, Portugal
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Björk M, Trupin L, Thyberg I, Katz P, Yelin E. Differences in activity limitation, pain intensity, and global health in patients with rheumatoid arthritis in Sweden and the USA: a 5-year follow-up. Scand J Rheumatol 2011; 40:428-32. [PMID: 21936614 DOI: 10.3109/03009742.2011.594963] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE In this study we compared activity limitations, pain intensity, and global health in patients with rheumatoid arthritis (RA) in Sweden and the USA and aimed to determine whether nationality is associated with these outcomes. METHODS We used longitudinal data from the 'Swedish TIRA project' (n = 149) and the University of California, San Francisco (UCSF) RA panel study (n = 85). Data were collected annually concerning use of medications [disease-modifying anti-rheumatic drugs (DMARDs), biologics, and corticosteroids], morning stiffness, number of swollen joints, and number of painful joints. Three self-reported outcome measures were examined: pain intensity measured on a 0-100 visual analogue scale (VAS), activity limitation according to the Health Assessment Questionnaire (HAQ), and global health. To analyse the data, the Student's t-test, the χ(2)-test, and the generalized estimating equation (GEE) method were used. RESULTS Nationality was significantly related to HAQ score and pain intensity, even after adjustment for covariates. The patients in the TIRA cohort reported a lower HAQ score and a higher pain intensity than the patients in the UCSF cohort. Nationality was not related to global health. CONCLUSION Patients with RA should be assessed with awareness of the psychosocial and cultural context because disability seems to be affected by nationality. Further knowledge to clarify how a multinational setting affects disability could improve the translation of interventions for patients with RA across nationalities.
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Affiliation(s)
- M Björk
- Department of Rehabilitation, School of Health Sciences, Jönköping University, Jönköping, Sweden.
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Björk M, Thyberg I, Rikner K, Balogh I, Gerdle B. Sick Leave Before and After Diagnosis of Rheumatoid Arthritis - A Report from the Swedish TIRA Project. J Rheumatol 2010. [DOI: 10.3899/jrheum.080523c1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Garnier-Laplace J, Copplestone D, Gilbin R, Alonzo F, Ciffroy P, Gilek M, Agüero A, Björk M, Oughton DH, Jaworska A, Larsson CM, Hingston JL. Issues and practices in the use of effects data from FREDERICA in the ERICA Integrated Approach. J Environ Radioact 2008; 99:1474-1483. [PMID: 18550231 DOI: 10.1016/j.jenvrad.2008.04.012] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2007] [Revised: 02/18/2008] [Accepted: 04/10/2008] [Indexed: 05/26/2023]
Abstract
The ERICA Integrated Approach requires that a risk assessment screening dose rate is defined for the risk characterisation within Tiers 1 and 2. At Tier 3, no numerical screening dose rate is used, and the risk characterisation is driven by methods that can evaluate the possible effects of ionising radiation on reproduction, mortality and morbidity. Species sensitivity distribution has been used to derive the ERICA risk assessment predicted no-effect dose rate (PNEDR). The method used was based on the mathematical processing of data from FRED (FASSET radiation effects database merged with the EPIC database to form FREDERICA) and resulted in a PNEDR of 10 microGy/h. This rate was assumed to ascribe sufficient protection of all ecosystems from detrimental effects on structure and function under chronic exposure. The value was weighed against a number of points of comparison: (i) PNEDR values obtained by application of the safety factor method, (ii) background levels, (iii) dose rates triggering effects on radioactively contaminated sites and (iv) former guidelines from literature reviews. In Tier 3, the effects analysis must be driven by the problem formulation and is thus highly case specific. Instead of specific recommendations on numeric values, guidance on the sorts of methods that may be applied for refined effect analysis is provided and illustrated.
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Affiliation(s)
- J Garnier-Laplace
- Institute of Radioprotection and Nuclear Safety (IRSN), DEI/SECRE, Laboratory of Radioecology and Ecotoxicology, Cadarache Building 186, BP3, 13115 St-Paul-lez-Durance Cedex, France.
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