Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2024
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Authors
Sidhi Soman Agnethe Christiansen Roman Florinski Girija Bharat Eirik Hovland Steindal Luca Nizzetto Paromita ChakrabortyAbstract
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1. We propose that the ecological resilience of communities to permanent changes of the environment can be based on how variation in the overall abundance of individuals affects the number of species. Community sensitivity is defined as the ratio between the rate of change in the log expected number of species and the rate of change in the log expected number of individuals in the community. High community sensitivity means that small changes in the total abundance strongly impact the number of species. Community resistance is the proportional reduction in expected number of individuals that the community can sustain before expecting to lose one species. A small value of community resistance means that the community can only endure a small reduction in abundance before it is expected to lose one species. 2. Based on long-term studies of four bird communities in European deciduous forests at different latitudes large differences were found in the resilience to environmental perturbations. Estimating the variance components of the species abundance distribution revealed how different processes contributed to the community sensitivity and resistance. Species heterogeneity in the population dynamics was the largest component, but its proportion varied among communities. Species-specific response to environmental fluctuations was the second major component of the variation in abundance. 3. Estimates of community sensitivity and resistance based on data only from a single year were in general larger than those based on estimates from longer time series. Thus, our approach can provide rapid and conservative assessment of the resilience of communities to environmental changes also including only short-term data. 4. This study shows that a general ecological mechanism, caused by increased strength of density dependence due to reduction in resource availability, can provide an intuitive measure of community resilience to environmental variation. Our analyses also illustrate the importance of including specific assumptions about how different processes affect community dynamics. For example, if stochastic fluctuations in the environment affect all species in a similar way, the sensitivity and resistance of the community to environmental changes will be different from communities in which all species show independent responses.
Authors
Atle Wehn HegnesAbstract
This book analyses the implementation and challenges of using Geographical Indications in Norway. Adapting the modern and global system of Geographical Indications (GIs) to food cultures is a recurring challenge. This text uses Norway as a case study to describe, understand, and explain the socio-cultural adaptation of GIs. The empirical analysis shows that administrators, producers, consultants, and others make a significant effort to adapt the scheme to Norwegian food culture and the food culture to the scheme. Through the development and use of a new conceptual framework, the book continues to show how adaptations occurred and their influence on the development of the Norwegian food culture. The author also reflects upon the status of Norwegian GIs in emerging food cultural contexts related to sustainable and technology change. In summary, this book exhibits the connection between modern global legislative arrangements and traditional local products, providing a springboard for further research on cultural adaptation work of GIs in established and future global food cultures. This book will be of interest to researchers, policymakers, and students in agri-food studies, sociology of food and agriculture, agricultural and rural development, and cultural studies.
2023
Authors
Richard Helliwell Tommy Ruud Davide Bochicchio Anne Grete Kongsted Matthias Koesling Stig Milan Thamsborg Marina Spinu Marina Stuelj Atle WibeAbstract
In summary, land, local and national markets are limiting and facilitatory factors of organic pig production. Only in Denmark did there appear to be organic pig farming operating at scale to meet export and national market demands. Whereas Otherwise, production and consumption was much more localized, often involving direct sales networks and contracts with local retailers and restaurants. Here, organic was just one of the key qualities to support sales with the transparency for customers being deemed more important in some instances. The result was diverse business structures with the scale and economic viability of production being limited due to the specifics of the market niche into which the pork was being sold. However, in all cases outdoor pig rearing was a value adding process that created additional important streams of revenue as part of diversified farm enterprises. The value of organic certification was questioned in some instances where the market was hyper localized and the practice of outdoor rearing and the transparency it produced for the consumer were considered to be of greater value. Economic conditions were challenging for all producers and with the exception of Denmark pigs were not the sole source of income. Where sales to retailers and local restaurants were not possible, or had not been established, direct sales networks were the principal source of consumer sales. However, maintaining direct sales networks could be challenging and involved significant work, including logistics. The high level of wellbeing and satisfaction of the farmer was a re-occuring theme which suggests that rearing pigs outdoors has mutual benefits for the farmer, the pigs and potentially the environment.
Authors
Adam Eindride Naas Lasse Torben Keetz Rune Halvorsen Peter Horvath Trond Simensen Ida Marielle Mienna Anders BrynAbstract
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