Economic and hydraulic divergences underpin ecological differentiation in the Bromeliaceae

Leaf economic and hydraulic theories have rarely been applied to the ecological differentiation of speciose herbaceous plant radiations. The role of character trait divergences and network reorganization in the differentiation of the functional types in the megadiverse Neotropical Bromeliaceae was explored by quantifying a range of leaf economic and hydraulic traits in 50 diverse species. Functional types, which are defined by combinations of C₃ or Crassulacean acid metabolism (CAM) photosynthesis, terrestrial or epiphytic habits, and non‐specialized, tank‐forming or atmospheric morphologies, segregated clearly in trait space. Most classical leaf economic relationships were supported, but they were weakened by the presence of succulence. Functional types differed in trait‐network architecture, suggesting that rewiring of trait‐networks caused by innovations in habit and photosynthetic pathway is an important aspect of ecological differentiation. The hydraulic data supported the coupling of leaf hydraulics and gas exchange, but not the hydraulic safety versus efficiency hypothesis, and hinted at an important role for the extra‐xylary compartment in the control of bromeliad leaf hydraulics. Overall, our findings highlight the fundamental importance of structure–function relationships in the generation and maintenance of ecological diversity.     

Incorporating Socio‐economic Factors into Restoration: Implications from Industrially Harvested Peatlands

In establishing effective restoration goals, one of the four key issues of increased attention that Hobbs calls for is in the area of incorporating socio‐economic investigations and theories into restoration practice in a synergistic manner. Although often commented upon by restoration practitioners, this is an area of research that is poorly developed, and because it relies on an uneasy combination of empirical and interpretative research methodologies a multidisciplinary alignment may be problematic in practice. This opinion piece is drawn from experiences in examining the after‐use of industrially mined peatland landscapes, and synthesizes ideas that have emerged from socio‐economic research over several years in order to offer an opinion on how Hobbs' call may be addressed. Because socio‐economic concerns are at the root of all restoration projects, sociological methods may be useful as tools in stakeholder engagement in research and planning for landscape rehabilitation as a mechanism for reducing the potential for conflict and for facilitating participative or collaborative restoration.     

Groundwater remediation and the cost effectiveness of phytoremediation

In 1999, phytoremediation was applied at the site of a Belgian car factory to contain two BTEX plumes. This case study evaluates the cost effectiveness of phytoremediation compared to other remediation options, applying a tailored approach for economic evaluation. Generally, when phytoremediation is addressed as being cost effective, the cost effectiveness is only determined on an average basis. This study however, demonstrates that an incremental analysis may provide a more nuanced conclusion. When the cost effectiveness is calculated on an average basis, in this particular case, the no containment strategy (natural attenuation) has the lowest cost per unit mass removed and hence, should be preferred. However, when the cost effectiveness is determined incrementally, no containment should only be preferred if the value of removing an extra gram of contaminant mass is lower than 320 euros. Otherwise, a permeable reactive barrier should be adopted. A similar analysis is provided for the effect determined on the basis of remediation time. Phytoremediation is preferred compared to 'no containment' if reaching the objective one year earlier is worth 7 000 euros.     

A scoping review and research synthesis on financing and regulating oral care in long-term care facilities

doi: 10.1111/j.1741‐2358.2011.00575.x A scoping review and research synthesis on financing and regulating oral care in long‐term care facilities Background: Oral health care for frail elders is grossly inadequate almost everywhere, and our knowledge of regulating and financing oral care in this context is unclear. Objective: This scoping study examined and summarised the published literature available and the gaps in knowledge about regulating and financing oral care in long‐term care (LTC) facilities. Methods: We limited the electronic search to reports on regulating and financing oral care, including reports, commentaries, reviews and policy statements on financing and regulating oral health‐related services. Results: The broad electronic search identified 1168 citations, which produced 42 references, including 26 pieces of grey literature for a total of 68 papers. Specific information was found on public and private funding of care and on difficulties regulating care because of professional segregation, difficulties assessing need for care, uncertainty on appropriateness of treatments and issues around scope of professional practice. A wide range of information along with 19 implications and 18 specific gaps in knowledge emerged relevant to financing and regulating oral healthcare services in LTC facilities. Conclusions: Effort has been given to enhancing oral care for frail elders, but there is little agreement on how the care should be regulated or financed within the LTC sector.     

Process development and economic evaluation of recombinant human lactoferrin expressed in rice grain

In this paper, we show that recombinant human lactoferrin (rhLF) has been stably expressed at 0.5% brown rice flour weight for nine generations. Process development indicates that rhLF can be efficiently extracted from rice flour in 20 mM phosphate buffer (pH 7.0) containing up to 0.5 M NaCl and at a ratio of 1 kg flour to 10 L buffer. After solid/liquid separation, the extract can then be loaded directly onto an ion-exchange column and rhLF can be eluted using 0.8 M NaCl. The resulting rhLF is about 95 pure. A range of biochemical and biophysical analyses were carried out and results indicated that the purified rhLF was identical to its native human counterpart other than its glycosylation. Economic analysis shows that at 600 kg/year scale, the cash cost to produce 1 g of rhLF of pharmaceutical grade is US$ 5.90. Analysis also indicates that the expression level has profound impact on costs related to planting, milling, extraction and purification, thus high level expression of recombinant protein in plants is one of the key parameters for the success of plant made pharmaceuticals.     

The anatomical and compositional basis of leaf mass per area

Leaf dry mass per unit leaf area (LMA) is a central trait in ecology, but its anatomical and compositional basis has been unclear. An explicit mathematical and physical framework for quantifying the cell and tissue determinants of LMA will enable tests of their influence on species, communities and ecosystems. We present an approach to explaining LMA from the numbers, dimensions and mass densities of leaf cells and tissues, which provided unprecedented explanatory power for 11 broadleaved woody angiosperm species diverse in LMA (33–262 g m^?2; R² = 0.94; P < 0.001). Across these diverse species, and in a larger comparison of evergreen vs. deciduous angiosperms, high LMA resulted principally from larger cell sizes, greater major vein allocation, greater numbers of mesophyll cell layers and higher cell mass densities. This explicit approach enables relating leaf anatomy and composition to a wide range of processes in physiological, evolutionary, community and macroecology.     

Integrated Economic Equilibrium and Life Cycle Assessment Modeling for Policy‐based Consequential LCA

Consequential life cycle assessment (CLCA) has emerged as a tool for estimating environmental impacts of changes in product systems that go beyond physical relationships accounted for in attributional LCA (ALCA). This study builds on recent efforts to use more complex economic models for policy‐based CLCA. A partial market equilibrium (PME) model, called the U.S. Forest Products Module (USFPM), is combined with LCA to analyze an energy demand scenario in which wood use increases 400 million cubic meters in the United States for ethanol production. Several types of indirect economic and environmental impacts are identified and estimated using USFPM‐LCA. A key finding is that if wood use for biofuels increases to high levels and mill residue is used for biofuels and replaced by natural gas for heat and power in forest products mills, then the increased greenhouse gas emissions from natural gas could offset reductions obtained by substituting biofuels for gasoline. Such high levels of biofuel demand, however, appear to have relatively low environmental impacts across related forest product sectors.     

Process and technoeconomic analysis of leading pretreatment technologies for lignocellulosic ethanol production using switchgrass

Six biomass pretreatment processes to convert switchgrass to fermentable sugars and ultimately to cellulosic ethanol are compared on a consistent basis in this technoeconomic analysis. The six pretreatment processes are ammonia fiber expansion (AFEX), dilute acid (DA), lime, liquid hot water (LHW), soaking in aqueous ammonia (SAA), and sulfur dioxide-impregnated steam explosion (SO(2)). Each pretreatment process is modeled in the framework of an existing biochemical design model so that systematic variations of process-related changes are consistently captured. The pretreatment area process design and simulation are based on the research data generated within the Biomass Refining Consortium for Applied Fundamentals and Innovation (CAFI) 3 project. Overall ethanol production, total capital investment, and minimum ethanol selling price (MESP) are reported along with selected sensitivity analysis. The results show limited differentiation between the projected economic performances of the pretreatment options, except for processes that exhibit significantly lower monomer sugar and resulting ethanol yields.     

Nutritional Consequences of Wealth Differentials in East African Pastoralists: The Case of the Datoga of Northern Tanzania

Among African pastoralists evidence that wealth is associated with other measures of household success is scant and the significance of wealth differentials for family welfare remains poorly understood. Predictions that wealth in livestock is associated with increased adequacy of household food supply and with improved child nutrition are tested with longitudinal data on herd size, household composition, food supply, and anthropometric status collected in 1992 for a sample of traditional Datoga households (n = 20) living in the Eyasi basin in northern Tanzania. Although a majority subsisted below poverty cutoffs estimated for east African pastoral populations, there was large variation among households in measures of wealth and resource availability. Individuals in relatively wealthy households did not appear to benefit either in terms of adequacy of household food supply or in terms of average growth performance of young children. Theoretical and methodological challenges in the study of the relationship between wealth and health in nomadic pastoralists are discussed.     

Time for a paradigm shift toward a restorative culture

The United Nations' recent declaration of a Decade on Ecosystem Restoration (2021–2030) conveys the immense scales of degradation we face and the urgency of ecological recovery. Yet it speaks predominantly to productivity‐based approaches that may poorly balance conservation and development goals. As a result, it overlooks or distorts the very real potential for the holistic restoration of natural and cultural ecosystems to achieve lasting social and human health and well‐being benefits, and help stem the grotesque loss of biodiversity and ecosystem health in these times. There is need for a profound paradigm shift to address the prevailing economic and political climate that is keeping our world and biosphere on their current ominous trajectory. Such a paradigm shift could be based on the idea of a “restorative culture.” Practically, this could proceed by coupling the foundational philosophies and modus operandi of restoration ecology with public health medicine. The outcome would be an era of more healthy and more science‐ and knowledge‐driven sustainable restoration and local redevelopment. A restorative culture would recognize the fundamental linkages between ecosystems and human health, and consider biodiversity as fundamental to personal, community, and cultural well‐being and resilience. This requires public–private and community and individual partnerships at city, township, and watershed scales, as well as progressive industry champions working in collaboration with governments and the United Nations.