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131.
Speier Christopher J. Mondal Moni M. Weichgrebe Dirk 《Journal of Material Cycles and Waste Management》2018,20(4):2150-2162
Journal of Material Cycles and Waste Management - India currently has the second largest urban population worldwide, while facing an increasing burden on its urban solid waste infrastructure. To... 相似文献
132.
Dirk J. Roux Richard T. Kingsford Carly N. Cook Jane Carruthers Katrina Dickson Marc Hockings 《Conservation biology》2019,33(6):1266-1274
Although protected areas represent a pivotal response to escalating anthropogenic threats, they face many pressures, inside and outside their boundaries. Amid these challenges, effective conservation is guided by evidence-based decision making supported by dynamic processes of learning and knowledge exchange. Although different models promote knowledge exchange, embedding research scientists within conservation agencies is best suited to supporting evidence-based conservation. Based on available literature and our experiences on several continents, we considered the benefits, challenges, and opportunities associated with embedding research scientists within conservation agencies and the research required to better understand the effectiveness of the embedding model for evidence-based conservation. Embedded researchers provide long-term commitment to building social capital among academic and nonacademic stakeholders; act as skilled gatekeepers who increase 2-way flow of knowledge between scientists and managers; attract, coordinate, and support management-relevant external research projects; drive the design and maintenance of long-term monitoring; and align their research with information needs. Notwithstanding the many benefits, research capacity of conservation agencies is declining worldwide. A significant challenge is that the values, structures, functions, and effectiveness of the embedding model of knowledge exchange remain poorly evaluated and documented. Also, embedded researchers have to balance their desire for creativity and flexibility with the standardization and quality control required by their public sector agencies; may be perceived as not credible because they are not truly independent of their agency; and have to couple scientific productivity with skills for transdisciplinary research, social facilitation, and stakeholder engagement. Systematic research on embedding and other models of knowledge exchange, across different world contexts, is required to better understand the benefits, costs, and institutional arrangements associated with different models. 相似文献
133.
We note a tendency in organizational behavior research to link positive emotions with positive outcomes and negative emotions with negative outcomes. In this Incubator, we argue against this simple association and provide suggestions for researchers to develop interesting lines of enquiry that look beyond simple symmetrical associations. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
134.
Jeanne L. Nel Dirk J. Roux Amanda Driver Liesl Hill Ashton C. Maherry Kate Snaddon Chantel R. Petersen Lindie B. Smith‐Adao Heidi Van Deventer Belinda Reyers 《Conservation biology》2016,30(1):176-188
Knowledge co‐production and boundary work offer planners a new frame for critically designing a social process that fosters collaborative implementation of resulting plans. Knowledge co‐production involves stakeholders from diverse knowledge systems working iteratively toward common vision and action. Boundary work is a means of creating permeable knowledge boundaries that satisfy the needs of multiple social groups while guarding the functional integrity of contributing knowledge systems. Resulting products are boundary objects of mutual interest that maintain coherence across all knowledge boundaries. We examined how knowledge co‐production and boundary work can bridge the gap between planning and implementation and promote cross‐sectoral cooperation. We applied these concepts to well‐established stages in regional conservation planning within a national scale conservation planning project aimed at identifying areas for conserving rivers and wetlands of South Africa and developing an institutional environment for promoting their conservation. Knowledge co‐production occurred iteratively over 4 years in interactive stake‐holder workshops that included co‐development of national freshwater conservation goals and spatial data on freshwater biodiversity and local conservation feasibility; translation of goals into quantitative inputs that were used in Marxan to select draft priority conservation areas; review of draft priority areas; and packaging of resulting map products into an atlas and implementation manual to promote application of the priority area maps in 37 different decision‐making contexts. Knowledge co‐production stimulated dialogue and negotiation and built capacity for multi‐scale implementation beyond the project. The resulting maps and information integrated diverse knowledge types of over 450 stakeholders and represented >1000 years of collective experience. The maps provided a consistent national source of information on priority conservation areas for rivers and wetlands and have been applied in 25 of the 37 use contexts since their launch just over 3 years ago. When framed as a knowledge co‐production process supported by boundary work, regional conservation plans can be developed into valuable boundary objects that offer a tangible tool for multi‐agency cooperation around conservation. Our work provides practical guidance for promoting uptake of conservation science and contributes to an evidence base on how conservation efforts can be improved. 相似文献
135.
Ole Mertz Kenneth Grogan Dirk Pflugmacher Guillaume Lestrelin Jean-Christophe Castella Thoumthone Vongvisouk 《Journal of Land Use Science》2018,13(1-2):1-15
Forest reference levels (FRLs) provide a benchmark for assessing reduced emissions from deforestation and forest degradation (REDD+), and they are central to demonstrate additionality of REDD+. Attaining realistic FRLs, however, is challenging, especially in complex mosaic landscapes. We established FRLs in northern Laos for different reference periods and tested them against actual carbon stock changes. Annual time series of Landsat satellite images were used to capture the subtle changes in carbon stocks in complex landscapes characterized by shifting cultivation. We found that FRLs differ considerably depending on the reference period chosen. Abrupt land-use changes occurred when hybrid maize replaced traditional shifting cultivation and forests, and this invalidated carbon stock trends that would have been predicted had the FRL been projected into the future. We conclude that demonstrating additionality of REDD+ in fast developing areas is difficult and that payment systems rewarding potential emission reductions against hypothetical extrapolation of FRLs are unlikely to be a cost-effective strategy. 相似文献
136.
On Governance, Embedding and Marketing: Reflections on the Construction of Alternative Sustainable Food Networks 总被引:1,自引:0,他引:1
Dirk Roep Johannes S. C. Wiskerke 《Journal of Agricultural and Environmental Ethics》2012,25(2):205-221
Based on the reconstruction of the development of 14 food supply chain initiatives in 7 European countries, we developed a
conceptual framework that demonstrates that the process of increasing the sustainability of food supply chains is rooted in
strategic choices regarding governance, embedding, and marketing and in the coordination of these three dimensions that are inextricably interrelated. The framework also shows that when
seeking to further develop an initiative (e.g., through scaling up or product diversification) these interrelations need continuous
rebalancing. We argue that the framework can serve different purposes: it can be used as an analytical tool by researchers
studying food supply chain dynamics, as a policy tool by policymakers that want to support the development of sustainable
food supply chains, and as a reflexive tool by practitioners and their advisors to help them to position themselves, develop
a clear strategy, find the right allies, develop their skills, and build the capacities that they need. In this paper, we
elaborate upon the latter function of the framework and illustrate this briefly with empirical evidence from three of the
initiatives that we studied. 相似文献
137.
Camila Maia-Silva Michael Hrncir Dirk Koedam Renato Jose Pires Machado Vera Lucia Imperatriz-Fonseca 《Die Naturwissenschaften》2013,100(1):101-105
Between April and June of 2012 mantisflies (Plega hagenella) were found to be extensively parasitizing the nests of two groups of managed colonzies of eusocial stingless bees (Melipona subnitida) in the semi-arid region of northeastern Brazil. The mantisfly larvae developed inside closed brood cells of the bee comb, where each mantispid larva fed on the bee larva or pupa present in a single brood cell. Mature mantispid larvae pupated inside silken cocoons spun in place within their hosts' brood cells then emerged as pharate adults inside the bee colony. Pharate adults were never attacked and killed by host colony workers. Instead, colony workers picked up the pharates and removed them from the nest unharmed, treating them similar to the way that the general refuse is removed from the nest. Adult mantispids subsequently eclosed from their pupal exuviae outside the nest. Manipulative experiments showed that post-eclosion adult mantispids placed back within active bee colonies were quickly attacked and killed. These observations demonstrate that pharate and post-eclosion adults of P. hagenella are perceived differently by colony workers and that delayed adult eclosion is an important functional element in the parasitic life strategy of P. hagenella, allowing adults to escape without injury from the bee colonies they parasitize. 相似文献
138.
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140.
Hartmut Frank Harald Scholl Dirk Renschen Benoît Rether Abdelkrim Laouedj Yrjö Norokorpi 《Environmental science and pollution research international》1994,1(1):4-14
Haloacetic acids are atmospheric oxidation products of airborne C2-halocarbons which are important solvents and propellants. Levels of trichloroacetate (TCA) in conifer needles from mountain
ranges in Germany (Black Forest, Erzgebirge) and from two sites in Finland are compared; TCA is present in conifer needles
at concentrations up to 0.7 μmol/kg, MCA up to 0.2 μmol/kg. At the Finnish sites, TCA-concentrations and branch degeneration
symptoms of Scots pine are correlated. Monochloroacetate (MCA) has been determined in needle samples from Southern Germany
in concentrations exceeding its phytotoxicity threshold towards photoautotrophic organisms. Data on atmospheric chloroacetate
levels in Germany are also given; ambient air levels of chloroacetic acids range from about 2 pmol/m3 (TCA) to 390 pmol/m3 (MCA). TCA and dichloroacetic acid (DCA) arise from atmospheric oxidation of airborne C2-chlorocarbons, while the source of MCA is not yet known; several tentative pathways are suggested. 相似文献