Northern Eurasia Future Initiative (NEFI): facing the challenges and pathways of global change in the 21st century

During the past several decades, the Earth system has changed significantly, especially across Northern Eurasia. Changes in the socio-economic conditions of the larger countries in the region have also resulted in a variety of regional environmental changes that can have global consequences. The Northern Eurasia Future Initiative (NEFI) has been designed as an essential continuation of the Northern Eurasia Earth Science Partnership Initiative (NEESPI), which was launched in 2004. NEESPI sought to elucidate all aspects of ongoing environmental change, to inform societies and, thus, to better prepare societies for future developments. A key principle of NEFI is that these developments must now be secured through science-based strategies co-designed with regional decision makers to lead their societies to prosperity in the face of environmental and institutional challenges. NEESPI scientific research, data, and models have created a solid knowledge base to support the NEFI program. This paper presents the NEFI research vision consensus based on that knowledge. It provides the reader with samples of recent accomplishments in regional studies and formulates new NEFI science questions. To address these questions, nine research foci are identified and their selections are briefly justified. These foci include: warming of the Arctic; changing frequency, pattern, and intensity of extreme and inclement environmental conditions; retreat of the cryosphere; changes in terrestrial water cycles; changes in the biosphere; pressures on land-use; changes in infrastructure; societal actions in response to environmental change; and quantification of Northern Eurasia's role in the global Earth system. Powerful feedbacks between the Earth and human systems in Northern Eurasia (e.g., mega-fires, droughts, depletion of the cryosphere essential for water supply, retreat of sea ice) result from past and current human activities (e.g., large scale water withdrawals, land use and governance change) and potentially restrict or provide new opportunities for future human activities. Therefore, we propose that Integrated Assessment Models are needed as the final stage of global change assessment. The overarching goal of this NEFI modeling effort will enable evaluation of economic decisions in response to changing environmental conditions and justification of mitigation and adaptation efforts

Wnt1 and BMP2: two factors recruiting multipotent neural crest progenitors isolated from adult bone marrow

Recent studies have shown that neural crestderived progenitor cells can be found in diverse mammalian tissues including tissues that were not previously shown to contain neural crest derivatives, such as bone marrow. The identification of those ‘‘new’’ neural crest-derived progenitor cells opens new strategies for developing autologous cell replacement therapies in regenerative medicine. However, their potential use is still a challenge as only few neural crest-derived progenitor cells were found in those new accessible locations. In this study, we developed a protocol, based on wnt1 and BMP2 effects, to enrich neural crest-derived cells from adult bone marrow. Those two factors are known to maintain and stimulate the proliferation of embryonic neural crest stem cells, however, their effects have never been characterized on neural crest cells isolated from adult tissues. Using multiple strategies from microarray to 2D-DIGE proteomic analyses, we characterized those recruited neural crest-derived cells, defining their identity and their differentiating abilities

Developmental biology of melanocytes

Apart from embryonic stem cells (ESCs) in the blastocyst, neural crest stem cells (NCSCs) in vertebrate embryos represent the stem cell population in our body with the broadest developmental potential, generating most of the neurons and glia of the peripheral nervous system (PNS) as well as various nonneural cell types, such as smooth muscle cells in the outflow tract of the heart, craniofacial bone, and cartilage and, in particular, melanocytes in the skin. It is assumed that a third of all congenital birth defects are due to failures in neural crest development, illustrating the significance of this stem cell population. Moreover, processes underlying melanocyte development appear to be recapitulated, at least partially, during formation of melanoma, the most aggressive skin tumor. For instance, it has recently been shown that an embryonic NCSC gene expression signature is reactivated upon tumor initiation in a zebrafish model of melanoma, suggesting a functional involvement of a NCSC program in tumors originating from neural crest derivatives. Thus, to gain insights into melanoma biology, it is important to understand the mechanisms regulating NCSC and melanocyte development, as outlined in this chapter

Ethical Consumerism in the Agro-Food Sector: Is There Evidence of Consumption-Based Social Movements?

This paper explores the possibility of consumption-based social movements utilizing organically grown, Fair Trade labeled and locally grown food as a case study. Traditional social movements have an organizational base, however many people are making consumption choices based on concerns for environmental and social issues. The study described here uses a survey of Colorado residents and focus groups to better understand why some people purchase ethically produced food items. The results show that many consumers are not only purchasing these food items in large amounts, but many are doing so because they believe they are part of a larger community with shared values. This demonstrates that many believe social change based on consumption choices is possible and perhaps this is an example of a new type of social movement