Interactive comment on ″Comment on : ″Possible source of ancient carbon in phytolith concentrates from harvested grasses″ by G.M. Santos et al. (2012)″ by L.A. Sullivan and J.F. Parr

International audienc

Love, rights and solidarity: studying children's participation using Honneth's theory of recognition

Recent attempts to theorize children’s participation have drawn on a wide range of ideas, concepts and models from political and social theory. The aim of this article is to explore the specific usefulness of Honneth’s theory of a ‘struggle for recognition’ in thinking about this area of practice. The article identifies what is distinctive about Honneth’s theory of recognition, and how it differs from other theories of recognition. It then considers the relevance of Honneth’s conceptual framework to the social position of children, including those who may be involved in a variety of ‘participatory’ activities. It looks at how useful Honneth’s ideas are in direct engagement with young people’s praxis, drawing on ethnographic research with members of a children and young people’s forum. The article concludes by reflecting on the implications of this theoretical approach and the further questions which it opens up for theories of participation and of adult–child relations more generally

Pursuing concordance: moving away from paternalism

In the second of two articles exploring the value and application of concordance across nursing practice the discussion is aimed at clinical settings and patient groups where concordance may have been viewed as impractical. The author harnesses Cribb and Entwhistle's broader conception of shared decision making and the notion of decision-making capacity as a continuum to argue that concordance can be pursued effectively in challenging settings such as childcare practice, mental health and the care of older people. As in the first paper (McKinnon, 2013) the discussion is not limited to medicines management but remains engaged with all aspects of nursing practice. Legal and ethical frameworks, social participation theory and research across healthcare practice are sourced to argue for concordant approaches in the care of patients who may at times have compromised decision-making capacity. Ideas of direct and indirect concordance are explored. © 2014 MA Healthcare Ltd

Integrating microbial ecology into ecosystem models: challenges and priorities

Microbial communities can potentially mediate feedbacks between global change and ecosystem function, owing to their sensitivity to environmental change and their control over critical biogeochemical processes. Numerous ecosystem models have been developed to predict global change effects, but most do not consider microbial mechanisms in detail. In this idea paper, we examine the extent to which incorporation of microbial ecology into ecosystem models improves predictions of carbon (C) dynamics under warming, changes in precipitation regime, and anthropogenic nitrogen (N) enrichment. We focus on three cases in which this approach might be especially valuable: temporal dynamics in microbial responses to environmental change, variation in ecological function within microbial communities, and N effects on microbial activity. Four microbially-based models have addressed these scenarios. In each case, predictions of the microbial-based models differ—sometimes substantially—from comparable conventional models. However, validation and parameterization of model performance is challenging. We recommend that the development of microbial-based models must occur in conjunction with the development of theoretical frameworks that predict the temporal responses of microbial communities, the phylogenetic distribution of microbial functions, and the response of microbes to N enrichment

Temperature-Induced Increase in Methane Release from Peat Bogs: A Mesocosm Experiment

Peat bogs are primarily situated at mid to high latitudes and future climatic change projections indicate that these areas may become increasingly wetter and warmer. Methane emissions from peat bogs are reduced by symbiotic methane oxidizing bacteria (methanotrophs). Higher temperatures and increasing water levels will enhance methane production, but also methane oxidation. To unravel the temperature effect on methane and carbon cycling, a set of mesocosm experiments were executed, where intact peat cores containing actively growing Sphagnum were incubated at 5, 10, 15, 20, and 25°C. After two months of incubation, methane flux measurements indicated that, at increasing temperatures, methanotrophs are not able to fully compensate for the increasing methane production by methanogens. Net methane fluxes showed a strong temperature-dependence, with higher methane fluxes at higher temperatures. After removal of Sphagnum, methane fluxes were higher, increasing with increasing temperature. This indicates that the methanotrophs associated with Sphagnum plants play an important role in limiting the net methane flux from peat. Methanotrophs appear to consume almost all methane transported through diffusion between 5 and 15°C. Still, even though methane consumption increased with increasing temperature, the higher fluxes from the methane producing microbes could not be balanced by methanotrophic activity. The efficiency of the Sphagnum-methanotroph consortium as a filter for methane escape thus decreases with increasing temperature. Whereas 98% of the produced methane is retained at 5°C, this drops to approximately 50% at 25°C. This implies that warming at the mid to high latitudes may be enhanced through increased methane release from peat bogs

The Impact of Boreal Forest Fire on Climate Warming

We report measurements and analysis of a boreal forest fire, integrating the effects of greenhouse gases, aerosols, black carbon deposition on snow and sea ice, and postfire changes in surface albedo. The net effect of all agents was to increase radiative forcing during the first year (34 ± 31 Watts per square meter of burned area), but to decrease radiative forcing when averaged over an 80-year fire cycle (–2.3 ± 2.2 Watts per square meter) because multidecadal increases in surface albedo had a larger impact than fire-emitted greenhouse gases. This result implies that future increases in boreal fire may not accelerate climate warming

Children’s participation in school grounds developments: creating a place for education that promotes children’s social inclusion

Abstract This paper advances the idea that ‘education for the social inclusion of children’ is similar but different to ‘inclusive education’ as it has come to be understood and used by some authors and UK government documents. ‘Inclusive education’ tends to carry an inward emphasis on the participation of children in the education system (with discussions on school culture, transitions, truancy, exclusion rates, underachievement, and school leaving age). In contrast, education for the promotion of children’s social inclusion requires an outward emphasis on children's participation in 'mainstream' society while they are still children. The latter emphasis is seen to be lacking in educational policy discourse in Scotland though a recent shift in policy towards education for active citizenship is noted. Examples are provided to show how many policy statements enact a limitation on the scope for education to promote children’s social inclusion by emphasising children’s deficits as social actors and focussing on the ‘condition’ of social exclusion. The paper draws on an empirical study of children’s participation in changing school grounds in Scotland. The analysis shows how the enclosure of learning in books, classrooms and normative curricula was challenged. Learning from school grounds developments was constructed relationally and spatially but the scope of what was to be learned was often delineated by adults. The paper closes with a discussion of how education that promotes the social inclusion of children will benefit from seeing both children and adults as current though partial citizens and utilising socio-spatial opportunities for the generation of uncertain curricula through their shared and/or differentiated participation

Microbial regulation of the soil carbon cycle: evidence from gene-enzyme relationships.

A lack of empirical evidence for the microbial regulation of ecosystem processes, including carbon (C) degradation, hinders our ability to develop a framework to directly incorporate the genetic composition of microbial communities in the enzyme-driven Earth system models. Herein we evaluated the linkage between microbial functional genes and extracellular enzyme activity in soil samples collected across three geographical regions of Australia. We found a strong relationship between different functional genes and their corresponding enzyme activities. This relationship was maintained after considering microbial community structure, total C and soil pH using structural equation modelling. Results showed that the variations in the activity of enzymes involved in C degradation were predicted by the functional gene abundance of the soil microbial community (R2>0.90 in all cases). Our findings provide a strong framework for improved predictions on soil C dynamics that could be achieved by adopting a gene-centric approach incorporating the abundance of functional genes into process models