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  • Canadian Science Publishing  (24)
  • 1
    In: Canadian Journal of Civil Engineering, Canadian Science Publishing, Vol. 36, No. 6 ( 2009-06), p. 1071-1084
    Abstract: Interval-parameter nonlinear programming (INP) is an extension of conventional nonlinear optimization methods for handling both nonlinearities and uncertainties. However, challenges exist in its solution method, leading to difficulties in obtaining a global optimum. In this study, a 0-1 piecewise approximation approach is provided for solving the INP, through integration with an interactive algorithm for interval-parameter optimization problems. Thus, the INP model can be transformed into two deterministic submodels that correspond to the lower and upper bounds of the objective-function value. By solving the two submodels, interval solutions can be obtained, which are used for generating a range of decision options. The developed method is applied to a case of long-term municipal solid waste (MSW) management planning. Not only uncertainties expressed as interval values but also nonlinearities in the objective function can be tackled. Moreover, economies of scale (EOS) effects on waste-management cost can also be reflected. The results obtained can be used for generating decision alternatives and thus help waste managers to identify desired policies for MSW management and planning. Compared with the conventional interval-parameter linear and quadratic programs, the developed INP can better reflect system-cost variations and generate more robust solutions.
    Type of Medium: Online Resource
    ISSN: 0315-1468 , 1208-6029
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2009
    detail.hit.zdb_id: 1490923-6
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  • 2
    Online Resource
    Online Resource
    Canadian Science Publishing ; 2019
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 76, No. 7 ( 2019-07), p. 1041-1051
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 76, No. 7 ( 2019-07), p. 1041-1051
    Abstract: Aquatic animals are integral to ocean and freshwater ecosystems and their resilience, are depended upon globally for food sustainability, and support coastal communities and Indigenous peoples. However, global aquatic environments are changing profoundly due to anthropogenic actions and environmental change. These changes are altering distributions, movements, and survival of aquatic animals in ways that are not well understood. The Ocean Tracking Network (OTN) is a global partnership that is filling this knowledge gap. OTN Canada, a pan-Canadian (and beyond) research network, was launched in 2010 with visionary funding by the Canadian government. In our introduction to this special issue, we briefly overview how this interdisciplinary network has used state-of-the-art technologies, infrastructure, electronic tags and sensors, and associated cutting-edge research and training programs to better understand changing marine and freshwater dynamics and their impact on ecosystems, resources, and animal ecology. These studies have provided unprecedented insights into animal ecology and resource management at a range of spatial and temporal scales and by interfacing animal movements with novel measures of environment, physiology, disease, genetics–genomics, and anthropogenic stressors.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 3
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 89, No. 5 ( 2011-05), p. 435-451
    Abstract: In Canada, habitat loss has pushed many more species to the brink of extinction than expected in a region with extensive wilderness. However, species richness gradients depend strongly on climate, so species are concentrated in southern regions, where agricultural and urban land uses are both intensive and extensive. Agricultural pesticide use is associated with increasing rates of species endangerment in the south, but long-range transport of persistent organic pollutants is an emerging issue in remote northern regions. Because their distributions reflect climate so strongly, climate change threatens species throughout Canada. Evidence indicates that species’ distributions, phenologies, and interactions with pests and diseases are changing more rapidly in response to climate change than global mean values. Nevertheless, climate change is expected to impose dispersal requirements that surpass species’ maximum rates. Habitat losses may interact with climate change to impair species’ dispersal still further, creating the potential for widespread disruption of biological systems in the most diverse areas of Canada. New research is urgently needed to address questions, and the ethics, around species translocation, ecosystem engineering to anticipate future environmental conditions, and strategies to facilitate the persistence of rare species in landscapes dominated by human activities.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2011
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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  • 4
    Online Resource
    Online Resource
    Canadian Science Publishing ; 2015
    In:  Canadian Journal of Forest Research Vol. 45, No. 10 ( 2015-10), p. 1358-1368
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 45, No. 10 ( 2015-10), p. 1358-1368
    Abstract: Mexican temperate forests, at the southernmost end of the distribution range of this ecosystem, are the world’s centre of diversity of pine and oak, with 55 and 161 species, respectively. Such forests are threatened by land-use change, unsustainable forest management practices, and climate change; these threats reduce their diversity, alter the distribution ranges of species, modify disturbance regimes, and reduce ecosystem adaptability. This paper briefly reviews (i) the ecology of the Mexican temperate forests, (ii) the ecological basis for the unique diversity of pine and oak species, (iii) the main disturbances as well as the main drivers of global changes affecting these forests, in particular climate change, and (iv) the social, economic, and cultural factors to be considered in proposing a new forest management approach. It proposes a new conceptual framework to manage Mexican temperate forests that are in line with (i) their natural dynamics, (ii) the rapidly changing and uncertain global environmental, social, and economic conditions, and (iii) the complex adaptive system approach. This new forest management combines functional zoning, multispecies plantations, and sylvicultural interventions to increase the adaptive capacity of forests as a way to balance the increasing need for timber products with the need for other ecosystem services facing rapidly changing and uncertain future environmental, social, and economic conditions.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2015
    detail.hit.zdb_id: 1473096-0
    SSG: 23
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  • 5
    Online Resource
    Online Resource
    Canadian Science Publishing ; 2013
    In:  Environmental Reviews Vol. 21, No. 4 ( 2013-12), p. 207-226
    In: Environmental Reviews, Canadian Science Publishing, Vol. 21, No. 4 ( 2013-12), p. 207-226
    Abstract: The boreal zone and its ecosystems provide numerous provisioning, regulating, cultural, and supporting services. Because of its resources and its hydroelectric potential, Canada’s boreal zone is important to the country’s resource-based economy. The region presently occupied by Canada’s boreal zone has experienced dramatic changes during the past 3 million years as the climate cooled and repeated glaciations affected both the biota and the landscape. For about the past 7000 years, climate, fire, insects, diseases, and their interactions have been the most important natural drivers of boreal ecosystem dynamics, including rejuvenation, biogeochemical cycling, maintenance of productivity, and landscape variability. Layered upon natural drivers are changes increasingly caused by people and development and those related to human-caused climate change. Effects of these agents vary spatially and temporally, and, as global population increases, the demands and impacts on ecosystems will likely increase. Understanding how humans directly affect terrestrial and aquatic ecosystems in Canada’s boreal zone and how these effects and actions interact with natural disturbance agents is a prerequisite for informed and adaptive decisions about management of natural resources, while maintaining the economy and environment upon which humans depend. This paper reports on the genesis and present condition of the boreal zone and its ecosystems and sets the context for a detailed scientific investigation in subsequent papers published in this journal on several key aspects: carbon in boreal forests; climate change consequences, adaptation, and mitigation; nutrient and elemental cycling; protected areas; status, impacts, and risks of non-native species; factors affecting sustainable timber harvest levels; terrestrial and aquatic biodiversity; and water and wetland resources.
    Type of Medium: Online Resource
    ISSN: 1181-8700 , 1208-6053
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2013
    detail.hit.zdb_id: 2027518-3
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  • 6
    Online Resource
    Online Resource
    Canadian Science Publishing ; 2018
    In:  Canadian Journal of Civil Engineering Vol. 45, No. 4 ( 2018-04), p. 241-247
    In: Canadian Journal of Civil Engineering, Canadian Science Publishing, Vol. 45, No. 4 ( 2018-04), p. 241-247
    Abstract: There is a pressing need to reduce pollution emissions from transportation and consequent negative effects on air quality, public health, and the global climate. Diverse traffic management strategies have been proposed and undertaken with primary or secondary goals of reducing motor vehicle emissions. The objective of this paper is to investigate the motivation and implementation of traffic management strategies to reduce motor vehicle emissions, with a focus on moderate-scale local and regional strategies that are broadly applicable. Public documents from 44 local, regional, and provincial government entities across Canada were reviewed for information regarding the implementation of 22 traffic management strategies. Results show that different levels of government are involved in the implementation of different types of strategies, and with a different mix of traffic, safety, and environmental motivations. Regional governments more frequently cite environmental motivations and appear to be most interested in the two strategies with the strongest empirical evidence of air quality benefits: area road pricing and low emission zones. Strengthening regional transportation planning and better integrating it with municipal and provincial planning could potentially increase the implementation of effective sustainable traffic management strategies in Canada. Additional opportunities exist through emphasizing the potential environmental co-benefits of strategies such as road pricing, speed management, and traffic signal and intersection control improvements.
    Type of Medium: Online Resource
    ISSN: 0315-1468 , 1208-6029
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 1490923-6
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  • 7
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1996
    In:  Canadian Journal of Plant Science Vol. 76, No. 4 ( 1996-10-01), p. 587-594
    In: Canadian Journal of Plant Science, Canadian Science Publishing, Vol. 76, No. 4 ( 1996-10-01), p. 587-594
    Abstract: Long-term experiments like those at Rothamsted in southeast England offer the best practical means of studying the effects of land management or global change on soil fertility, sustainability of yield or wider environmental issues. For the data from such experiments to be of use, farmers, scientists and policy makers must be certain of their validity. This is best assured by the rigorous management of the experiment, by ensuring that any changes are carefully considered and that all operations are well-documented. A steady flow of well-interpreted, published data is also essential. This paper gives examples of how the long-term field experiments at Rothamsted have been managed and how modifications have been made to ensure their relevance to modern agriculture. Key words: Rothamsted, sustainability, long-term experiments, global change
    Type of Medium: Online Resource
    ISSN: 0008-4220 , 1918-1833
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1996
    detail.hit.zdb_id: 2016989-9
    SSG: 12
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  • 8
    Online Resource
    Online Resource
    Canadian Science Publishing ; 2018
    In:  Canadian Journal of Forest Research Vol. 48, No. 3 ( 2018-03), p. 292-301
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 48, No. 3 ( 2018-03), p. 292-301
    Abstract: Forest managers are facing unprecedented challenges from rapid changes in forest pests. The core causes are changes in climate, land use, and global distributions of organisms. Due to invasions and range expansions by pests, and propagation of nonnative trees, managers are increasingly confronted with pest problems outside their range of experience. There is a need to adapt pest management practices more quickly and efficiently than is possible when managers work in isolation and mainly learn by trial and error. Here we identify general tactics for adaptation of forest pest management in the Anthropocene: growth and application of practical theory; improved biosecurity against future invasions; improved monitoring, prediction, and mitigation; increased sharing of knowledge among regions, countries, and continents; management plans that anticipate continuing change; improved assessment of costs, benefits, and risks of possible responses to new potential pests; assessment of system responses to pest management decisions so that subsequent decisions are increasingly better informed; and improved understanding of the couplings between forests, forest management, and socioeconomic systems. Examples of success in forest management can aid in other sectors (e.g., agriculture, pastoralism, fisheries, and water resources) that are similarly important to our environmental security and similarly challenged by global change.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
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  • 9
    Online Resource
    Online Resource
    Canadian Science Publishing ; 2020
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 77, No. 2 ( 2020-02), p. 326-341
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 77, No. 2 ( 2020-02), p. 326-341
    Abstract: Climate change is altering the hydrology of Canadian rivers to an unprecedented degree. Consequently, sustainable freshwater management practices need to adapt, which include the development of integrated water resource strategies and environmental flow recommendations. A particular challenge arises for these assessments due to the highly diverse nature of river ecosystems across Canada. This diversity can be addressed by using a classification system to create manageable spatial units. Building upon and adapting the results of a global river reach classification scheme, we present a multidisciplinary K-means clustering approach to categorize all river reaches of Canada into 23 types at fine spatial resolution. The typology is based on classifier variables related to hydrology, mostly derived from modelled long-term means of monthly discharges, physiography, climate, and fluvial geomorphology. Resulting maps provide baseline information for rivers of all size classes, from small headwater streams to very large rivers, across the entire country, including unmonitored regions such as the High Arctic. The classification system also points to some strategic expansion opportunities for the current Canadian monitoring network of river gauging stations.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 10
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1995
    In:  Canadian Journal of Soil Science Vol. 75, No. 4 ( 1995-11-01), p. 401-406
    In: Canadian Journal of Soil Science, Canadian Science Publishing, Vol. 75, No. 4 ( 1995-11-01), p. 401-406
    Abstract: Concerns for the effects of global environmental change, caused primarily by the interrelated issues of environmental degradation and population growth, have prompted a consortium of international and national agencies to develop a Framework for Evaluation of Sustainable Land Management (FESLM). The FESLM, based on logical pathway analyses, provides a systematic procedure for identification and development of indicators and thresholds of sustainability. An assessment of sustainability is achieved by comparing the performance of a given land use with the objectives of the five pillars of sustainable land management: productivity, security, protection, viability and acceptability. A classification for sustainability is proposed, and plans for future development of the FESLM are described. Key words: Sustainability, land management, indicators, thresholds, environment, agriculture
    Type of Medium: Online Resource
    ISSN: 0008-4271 , 1918-1841
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1995
    detail.hit.zdb_id: 2017003-8
    detail.hit.zdb_id: 417254-1
    SSG: 13
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