Quantifying the importance of functional traits for primary production in aquatic plant communities

1. Aquatic plant meadows are important coastal habitats that sustain many ecosystem functions such as primary production and carbon sequestration. Currently, there is a knowledge gap in understanding which plant functional traits, for example, leaf size or plant height underlie primary production in aquatic plant communities. 2. To study how plant traits are related to primary production, we conducted a field survey in the Baltic Sea, Finland, which is characterized by high plant species and functional diversity. Thirty sites along an exposure gradient were sampled (150 plots), and nine plant morphological and chemical traits measured. The aim was to discern how community-weighted mean traits affect community production and whether this relationship changes along an environmental gradient using structural equation modelling (SEM). 3. Plant height had a direct positive effect on production along an exposure gradient (r = 0.33) and indirect effects through two leaf chemical traits, leaf δ15N and leaf δ13C (r = 0.24 and 0.18, respectively) resulting in a total effect of 0.28. In plant communities experiencing varying exposure, traits such as root N concentration and leaf δ15N had positive and negative effects on production, respectively. 4. Synthesis. Our results demonstrate that the relationship between aquatic plant functional traits and community production is variable and changes over environmental gradients. Plant height generally has a positive effect on community production along an exposure gradient, while the link between other traits and production changes in plant communities experiencing varying degrees of exposure. Thus, the underlying biological mechanisms influencing production differ in plant communities, emphasizing the need to resolve variability and its drivers in real-world communities. Importantly, functionally diverse plant communities sustain ecosystem functioning differently andPeer reviewe

Diversity, preventive work and education—matters of health and well-being in firefighter discourse

Purpose: The aim of this study is to analyse how recurrent health hindrance themes in the firefighter discourse, identified by firefighters themselves, relate to a set of policies about diversity, preventive work and education of firefighters. The intention is further to discuss the implications of these policy initiatives and the resistance against them in terms of firefighters’ health and well-being at work. Method: Firefighters from three different rescue stations in Sweden, participated in either a focus group discussion or individual interviews. Different themes in firefighter discourse that were described as hindrances to the health and well-being of firefighters were identified. A strategic sample of policy documents that relate to the very same themes was also chosen for analysis and here we combined critical discourse analysis (CDA) with critical policy analysis. Results: The health hindrance themes regarding diversity, preventive work and education that firefighters identified have in common that they relate to changes in work culture and the firefighter profession. Conclusion: In conclusion, we argue that the most important challenge for the rescue service to tackle in the future, is how to transform firefighting to be more inclusive and yet maintaining the good health and well-being that exists among the vast majority of today’s firefighters.Originally included in thesis in manuscript form.</p