108 research outputs found

    China and the Global Market for Forest Products: Transforming Trade to Benefit Forests and Livelihoods

    Get PDF
    China's spectacular economic growth over the last decade is having a dramatic impact throughout the world. It has become a leading nation in terms of its demand for forest products, and its influence is being felt as far afield as Cameroon and Cambodia, Indonesia and the United States. Burgeoning domestic consumption, in a nation with very limited per capita forest resources, has fueled the rapid rise in China's imports of forest products. Growing demand in the US, Europe and elsewhere for low-cost wood products manufactured in China has also contributed to the country's ever-increasing demand for foreign timber. China has rapidly become the wood workshop of the world, capturing almost a third of the global trade in furniture over the last eight years. In many supplier countries, particularly those with weak governance records, the increasing trade flows into China are associated with unsustainable harvesting, illegal logging and the abuse of forest communities' rights. However, China's growing demand also creates the possibility that millions of low-income forest producers can benefit from this new market. Trees and forests are the primary asset of millions of the world's poorest people and when governments enable the poor to use them wisely, they can be an important instrument of rural development. China is now in the world's spotlight, with governments, industry and development agencies eager to learn more about the global impact the country is having on forests and forest industries. Until recently, they have been hampered by a scarcity of reliable information and a lack of rigorous, publicly accessible analysis of macro-level trends. The primary source of market information to date has been proprietary analysis, the costs of which have precluded their use by all but the largest international investors and trade associations. This paper and the body of research it represents aims to help fill the knowledge gap. It is an overview of the key findings of many research studies conducted by Forest Trends, the Center for Chinese Agricultural Policy (CCAP), the Center for International Forestry Research (CIFOR) and their many partners in China and the Asia-Pacific region. As an overview, it necessarily focuses on broader and more globally critical issues. The synthesis of this research presents a wake-up call for the global forestry community. One of our key findings is that domestic and export demand for Chinese manufactured wood products will continue to grow dramatically, at least over the medium term and probably well beyond. So, in turn, will the demand for both home-grown and imported timber. Furthermore, China should be seen as the harbinger of even greater change, as India and other populous developing countries increase their demand for forest products. It is now clear that the global forest market is undergoing dramatic changes, and that these changes have important implications for forests, forest people and industry globally. We hope this paper helps governments, industry and civil society gain a clearer understanding of their respective roles in the global timber market. It is also hoped that it will help them to take an important leadership role in helping to transform the forest products market to one that not only ensures sustainable forestry and conservation, but to one that provides satisfactory livelihood opportunities for forest dependent communities, and promotes sustainable economic development for all nations

    Flow-Induced Twist-Compression in a Twisted Nematic Cell

    Get PDF
    Lizhen Ruan and J. Roy Sambles, Physical Review Letters, Vol. 90, article 168701 (2003). "Copyright © 2003 by the American Physical Society."An optical convergent-beam guided-wave technique is used to explore in detail the dynamic flow effects in a twisted nematic cell. During switch-on it is found that the dynamic flow compresses the director twist to regions close to the cell walls. For high fields this twist compression takes the cell far beyond the Mauguin limit and it no longer effectively guides the polarization of the light through the cell. This results in a very fast switch to a transient dark state

    Effects of Time of Day and Sleep Deprivation on Motorcycle-Driving Performance

    Get PDF
    The aim of this study was to investigate whether motorcycle handling capabilities – measured by means of the efficiency of emergency manoeuvres – were dependent on prior sleep deprivation and time of day. Twelve male participants voluntarily took part in four test sessions, starting at 6 a.m., 10 a.m., 2 p.m., and 6 p.m., following a night either with or without sleep. Each test session comprised temperature and sleepiness measurements, before three different types of motorcycling tests were initiated: (1) stability in straight ahead riding at low speed (in “slow motion” mode and in “brakes and clutch” mode), (2) emergency braking and (3) crash avoidance tasks performed at 20 kph and 40 kph. The results indicate that motorcycle control at low speed depends on time of day, with an improvement in performance throughout the day. Emergency braking performance is affected at both speeds by time of day, with poorer performance (longer total stopping distance, reaction time and braking distance) in the morning, and also by sleep deprivation, from measurements obtained at 40 kph (incorrect initial speed). Except for a tendency observed after the sleepless night to deviate from the initial speed, it seems that crash avoidance capabilities are quite unaffected by the two disturbance factors. Consequently, some motorcycle handling capabilities (stability at low speed and emergency braking) change in the same way as the diurnal fluctuation observed in body temperature and sleepiness, whereas for others (crash avoidance) the participants were able to maintain their initial performance level despite the high levels of sleepiness recorded after a sleepless night. Motorcycle riders have to be aware that their handling capabilities are limited in the early morning and/or after sleep deprivation. Both these situations can increase the risk of falls and of being involved in a road accident

    Managerial Views of Corporate Impacts and Dependencies on Ecosystem Services : A Case of International and Domestic Forestry Companies in China

    Get PDF
    A line of research is emerging investigating the private sector impacts and dependencies on critical biodiversity and ecosystem services, and related business risks and opportunities. While the ecosystem services narrative is being forwarded globally as a key paradigm for promoting business sustainability, there is scarce knowledge of how these issues are considered at managerial level. This study thus investigates managerial views of corporate sustainability after the ecosystem services concept. We analyse interviews conducted with 20 managers from domestic and international forestry companies operating with a plantation-based business model in China. Content analysis was employed to analyse the data, with a focus on four key areas: (1) interviewee familiarity with the ecosystem services concept; (2) their views of corporate dependencies and impacts on ecosystem services; (3) related business risks and opportunities; and (4) viability of existing instruments and practices that can be employed in detecting and addressing business impacts and dependencies on ecosystem services. Through an inductive approach to the empirical findings, we refined a framework that holds operational value for developing company response strategies to ecosystem services impact/dependence assessment, ensuring that all issues are addressed comprehensively, and that related risks and opportunities are properly acknowledged.Peer reviewe

    Immunity Traits in Pigs: Substantial Genetic Variation and Limited Covariation

    Get PDF
    BACKGROUND: Increasing robustness via improvement of resistance to pathogens is a major selection objective in livestock breeding. As resistance traits are difficult or impossible to measure directly, potential indirect criteria are measures of immune traits (ITs). Our underlying hypothesis is that levels of ITs with no focus on specific pathogens define an individual's immunocompetence and thus predict response to pathogens in general. Since variation in ITs depends on genetic, environmental and probably epigenetic factors, our aim was to estimate the relative importance of genetics. In this report, we present a large genetic survey of innate and adaptive ITs in pig families bred in the same environment. METHODOLOGY/PRINCIPAL FINDINGS: Fifty four ITs were studied on 443 Large White pigs vaccinated against Mycoplasma hyopneumoniae and analyzed by combining a principal component analysis (PCA) and genetic parameter estimation. ITs include specific and non specific antibodies, seric inflammatory proteins, cell subsets by hemogram and flow cytometry, ex vivo production of cytokines (IFNα, TNFα, IL6, IL8, IL12, IFNγ, IL2, IL4, IL10), phagocytosis and lymphocyte proliferation. While six ITs had heritabilities that were weak or not significantly different from zero, 18 and 30 ITs had moderate (0.1<h2≤0.4) or high (h2>0.4) heritability values, respectively. Phenotypic and genetic correlations between ITs were weak except for a few traits that mostly include cell subsets. PCA revealed no cluster of innate or adaptive ITs. CONCLUSIONS/SIGNIFICANCE: Our results demonstrate that variation in many innate and adaptive ITs is genetically controlled in swine, as already reported for a smaller number of traits by other laboratories. A limited redundancy of the traits was also observed confirming the high degree of complementarity between innate and adaptive ITs. Our data provide a genetic framework for choosing ITs to be included as selection criteria in multitrait selection programmes that aim to improve both production and health traits

    Forest landscape ecology and global change: an introduction

    Get PDF
    Forest landscape ecology examines broad-scale patterns and processes and their interactions in forested systems and informs the management of these ecosystems. Beyond being among the richest and the most complex terrestrial systems, forest landscapes serve society by providing an array of products and services and, if managed properly, can do so sustainably. In this chapter, we provide an overview of the field of forest landscape ecology, including major historical and present topics of research, approaches, scales, and applications, particularly those concerning edges, fragmentation, connectivity, disturbance, and biodiversity. In addition, we discuss causes of change in forest landscapes, particularly land-use and management changes, and the expected structural and functional consequences that may result from these drivers. This chapter is intended to set the context and provide an overview for the remainder of the book and poses a broad set of questions related to forest landscape ecology and global change that need answers
    • …
    corecore