Microbial ecosystems as targets for improving pig gut health

To date, our understanding of the organisms which constitute the microbiomes of humans and our domesticated species has been limited by the technologies available to study them. Progress from culture to species-based DNA approaches has allowed us to appreciate the scale of animal microbiomes and the changes which can occur over time and space. However, in order to design and validate rational approaches to manipulating microbiomes to optimise health, welfare and productivity, we need to begin to understand them as ecosystems, in which the host and a complex mixture of micro-organisms are continuously engaged both in co-operation to produce resources from food and in competition for those resources. The application of ecological principles can guide this understanding, but we need to validate the concepts we use, since they may not all be as applicable as they might seem.

Survival and Transcriptomic Response of Clinically relevant pathogens on Surfaces in Relation to Probiotic and Traditional Cleaning Strategies

Prolonged survival of clinically relevant pathogens on inanimate surfaces represents a major concern in healthcare facilities. Contaminated surfaces can serve as reservoirs of potential pathogens and greatly hinder the prevention of healthcare-associated infections. Probiotic cleaning using environmental microorganisms to promote inter-species competition has been proposed as an alternative to traditional chemical-based cleaning using antimicrobials. Probiotic cleaning seeks to take advantage of ecological principles such as competitive exclusion and utilize benign microorganisms to inhibit viable pathogens on indoor surfaces. However, limited mechanistic study has yielded direct evidence that enables the scientific community to understand the stress response, or microbe-microbe interactions between healthcare-associated pathogens and probiotic bacteria. Therefore, to bridge this knowledge gap, we combined transcriptomics and traditional microbiology techniques to investigate the differential impact of chemical-based and probiotic surface cleaners on the survival of Acinetobacter baumannii and Klebsiella pneumoniae, two clinically important pathogens. Although probiotic Bacillus included in a commercialized All-Purpose Probiotic Cleaner persisted on surfaces for an extended period of time, surfaces contaminated with A. baumannii cleaned using chemical-based detergent with and without probiotic Bacillus showed no statistical difference in the viable colony forming units (CFUs) of A. baumannii. Similarly, for Klebsiella pneumoniae, there were negligible statistical differences in CFUs between probiotic and detergent cleaning scenarios. The transcriptome of A. baumannii with and without probiotic addition shared a high degree of similarity in overall gene expression, while the transcriptome of K. pneumoniae with and without probiotic addition differed in overall gene expression. Together, these results highlight the need to fully understand the underlying biological and ecological mechanisms for different pathogens and practical implications of probiotic indoor cleaning.

Economic-Ecological Principles and the Question of Mineral Waters in Brazil

The present study addresses the issue of mineral waters in Brazil, its institutional problem, and the consequences and conflicts arising from its irrational exploitation. As a solution to these problems and conflicts, it is proposed to integrate these mineral waters and their different types in the management of water resources and the application of guiding economic and ecological principles as in the case of the conception of post-normal science and the precautionary principle. To meet the objective, the authors opted for an exploratory and bibliographical research regarding the adopted procedure. It is concluded that the implementation of an institutional change will allow a participative and polycentric management, mainly at the level of the hydrographic basin committees, which will contribute to the application of the two mentioned principles and a sustainable management of this resource. However, there is a need for improvements in the national water resources policy to more effectively cover groundwater in which mineral waters are embedded.

Modelling interference between vectors of non-persistently transmitted plant viruses to identify effective control strategies

Aphids are the primary vector of plant viruses. Transient aphids, which probe several plants per day, are considered to be the principal vectors of non-persistently transmitted (NPT) viruses. However, resident aphids, which can complete their life cycle on a single host and are affected by agronomic practices, can transmit NPT viruses as well. Moreover, they can interfere both directly and indirectly with transient aphids, eventually shaping plant disease dynamics. By mean of an epidemiological model, originally accounting for ecological principles and agronomic practices, we explore the consequences of fertilization and irrigation, pesticide deployment and roguing of infected plants on the spread of viral diseases in crops. Our results indicate that the spread of NPT viruses can be i) both reduced or increased by fertilization and irrigation, depending on whether the interference is direct or indirect; ii) counter-intuitively increased by pesticide application and iii) reduced by roguing infected plants. We show that a better understanding of vectors’ interactions would enhance our understanding of disease transmission, supporting the development of disease management strategies.

Steps toward a digital ecology: ecological principles for the study of digital ecosystems

The notion of digital ecosystems has become a fruitful metaphor for examining the effects of digitalization across boundaries of organization, industry, lifeworld, mind, and body. In business-economic terms, the metaphor has inspired IS research into new business models, while in engineering terms, it has led to important insights into the design and governance of digital platforms. Studying digital ecosystems in these terms, however, makes it difficult to trace and explain those effects of digitalization, which do not materialize predominantly in economic and engineering patterns. Important relationships and their effects may therefore go unnoticed. In response, I draw on the ecological epistemology of Gregory Bateson and others to contribute an ecological approach to digital ecosystems. Such an understanding, I argue, expands the possibilities for tracing and explaining the wide-reaching, boundary-crossing effects of digitalization and the runaway dynamics they may lead to. I suggest to do this based on three principles: (1) part-of-ness—phenomena are to be observed as always part of a larger ecosystem; (2) systemic wisdom—ecosystems have limits, which need to be respected; and (3) information ecology—ecosystems are not mechanical but informed, cognitive systems. As my contribution, I propose six avenues for future IS research into digital ecology.

Transformation of Danube Recreational Sites

The purpose of the research was to verify models of sustainable urbanization of the Danube riverside landscape in the suburban surroundings of Bratislava. The research focused on landscape-ecological forms of suburban urbanization in the contact of the river Danube, in the context of meanders of the Danube branches with the formation of recreational localities. The implementation of ecological principles was based on the concept of regional structures with a vision of the renewal of the ancient branches of the Danube for the creation of the climatic envelope of Bratislava from the southwestern side. The completion of the Petržalka, Slnečnice, Južné Mesto, and rural structures near Jarovce, Rusovce, and Čuňovo, conditioned by ecological urbanization, will acquire more landscape elements and a system of blue and green infrastructure. The hierarchical transition of the city to the suburban localities is solved by creating zones of recreation and sports on the Danube. Variant case studies of the "Danubia Park" near the village of Čuňovo are located on the southwestern bank of the Hrušov Reservoir of the Danube, with access to the Wild Water sports zone and the Danubiana Gallery complex. The research followed up on the verification of the recreational function in the landscape and focused on the level of low occupancy, the integration of sports and recreational functions, accessibility by all modes of transport, the penetration of recreation into the open landscape. For the identity of the original landscape, freely modeled connections to the riparian zone, work with water flow in the area, port, pedestrian and cycling connections to the EuroVelo route, outdoor museums of the Danube meadows, lakes and wetland communities, workouts, and multifunctional playgrounds, forms of wellness, sauna world and natural swimming. Ecological recreation concepts in the landscape of the Danube floodplains on the banks of the Danube used the modeling of banks, watercourse lines, meandering of recreational areas, green axes, play areas, elements, and zones. They used lighthouses and lookout towers for accent and orientation. The hierarchy of the release of small urban structures and loose forms of sensitive urbanization with functional flexibility and attractiveness proved the justification and location in the landscape of the Danube meadows, in the contact zones of the protected landscape and the watercourse. In this way, the importance of the suburban landscape structure is beneficial for the city not only in terms of functional attractiveness but also in terms of landscape protection and the climatic influence of the city's hinterland on its compact structures.

Soil erosion prediction using USLE model in Cangkringan micro watershed model, Yogyakarta

Land use that is not in accordance with ecological principles causes’ excessive soil erosion. Soil erosion has an impact on decreasing soil productivity, increasing critical land and causing land degradation. It is essential to predict the amount of soil lost due to soil erosion to determine the conservation efforts applied to suppress the erosion rate. The estimation of erosion in this study using the USLE model, using 5 factors, namely erosivity (R), erodibility (K), slope length (LS), crop management (C), and soil conservation (P). The results showed that the level of erosion hazard in Cangkringan Micro Watershed Model consisted of 5, namely very light covering an area of 29.14 ha (2.15%), mild covering an area of 642.31 ha (47.44%), moderate covering an area of 545.62 ha (40.30%), heavy area of 129.00 ha (9.53%) and very heavy area of 7.94 ha (0.58%).

Ecological Engineering for Rice Insect Pest Management: The Need to Communicate Widely, Improve Farmers’ Ecological Literacy and Policy Reforms to Sustain Adoption

Ecological engineering (EE) involves the design and management of human systems based on ecological principles to maximize ecosystem services and minimize external inputs. Pest management strategies have been developed but farmer adoption is lacking and unsustainable. EE practices need to be socially acceptable and it requires shifts in social norms of rice farmers. In many countries where pesticides are being marketed as “fast moving consumer goods” (FMCG) it is a big challenge to shift farmers’ loss-averse attitudes. Reforms in pesticide marketing policies are required. An entertainment education TV series was able to reach wider audience to improve farmers’ ecological literacy, shifting beliefs and practices. To sustain adoption of ecologically based practices organizational structures, incentives systems and communication strategies to support the new norms and practices are needed.