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Registros recuperados: 51
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La familia pseudococcidae (Hemiptera: Coccoidea) en México Colegio de Postgraduados
Arriola Padilla, Víctor Javier..
Los pseudocóccidos presentan muchas especies de importancia económica, afectan a árboles frutales, forestales y de sombra, así como a cultivos agrícolas, plantas ornamentales y pastos. Se presenta una lista documentada y descriptiva de 153 especies de la familia Pseudococcidae en México, para cada una de ellas se mencionan nombres válidos, distribución, hospederos y diagnosis. Se registra un total de 75 familias de plantas hospederas asociadas a estos insectos. La información taxonómica y biológica está capturada en la base de datos COCCOIDEA. Con la información se elaboró una clave dicotómica de los 32 géneros de la familia en México. El análisis cladístico se elaboró con 37 caracteres, se construyó una matriz de datos y se analizó con el programa...
Tipo: Tesis Palavras-chave: Escamas; Piojos harinosos; Hospederos; Clave dicotómica; Filogenia; Doctorado; Entomología y Acarología; Scale; Mealybugs; Host plants; Dicotomic keys; Phylogeny.
Ano: 2009 URL: http://hdl.handle.net/10521/1531
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Global Water Governance in the Context of Global and Multilevel Governance: Its Need, Form, and Challenges Ecology and Society
Gupta, Joyeeta; Amsterdam Institute for Social Science Research, University of Amsterdam; UNESCO-IHE Institute for Water Education; J.Gupta@uva.nl.
To complement this Special Feature on global water governance, we focused on a generic challenge at the global level, namely, the degree to which water issues need to be dealt with in a centralized, concentrated, and hierarchical manner. We examined water ecosystem services and their impact on human well-being, the role of policies, indirect and direct drivers in influencing these services, and the administrative level(s) at which the provision of services and potential trade-offs can be dealt with. We applied a politics of scale perspective to understand motivations for defining a problem at the global or local level and show that the multilevel approach to water governance is evolving and inevitable. We argue that a centralized overarching governance...
Tipo: Peer-Reviewed article Palavras-chave: Global governance; Multilevel governance; Scale; Water governance.
Ano: 2013
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Interactions Among Spatial Scales Constrain Species Distributions in Fragmented Urban Landscapes Ecology and Society
Turner, Will R; Department of Ecology and Evolutionary Biology, University of Arizona; w.turner@conservation.org.
Tipo: Peer-Reviewed Reports Palavras-chave: Birds; Conservation; Constraint; Scale; Species distributions; Urban..
Ano: 2006
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Competing Claims on Natural Resources: What Role for Science? Ecology and Society
Giller, Ken E.; Wageningen University; ken.giller@wur.nl; Leeuwis, Cees; Wageningen University; cees.leeuwis@wur.nl; Andersson, Jens A.; Wageningen University; University of the Witwatersrand; jens.andersson@wur.nl; Andriesse, Wim; Wageningen University;; Brouwer, Arie; Wageningen University;; Frost, Peter; University of Zimbabwe;; Hebinck, Paul; Wageningen University;; van Ittersum, Martin K.; Wageningen University;; Koning, Niek; ;; Ruben, Ruerd; ;; Slingerland, Maja; Wageningen University;; Udo, Henk; Wageningen University;; Veldkamp, Tom; Wageningen University; Tom.Veldkamp@wur.nl; van de Vijver, Claudius; Wageningen University;; van Wijk, Mark T.; Wageningen University;; Windmeijer, Pieter; Wageningen University;.
Competing claims on natural resources become increasingly acute, with the poor being most vulnerable to adverse outcomes of such competition. A major challenge for science and policy is to progress from facilitating univocal use to guiding stakeholders in dealing with potentially conflicting uses of natural resources. The development of novel, more equitable, management options that reduce rural poverty is key to achieving sustainable use of natural resources and the resolution of conflicts over them. Here, we describe an interdisciplinary and interactive approach for: (i) the understanding of competing claims and stakeholder objectives; (ii) the identification of alternative resource use options, and (iii) the scientific support to negotiation processes...
Tipo: Peer-Reviewed Insight Palavras-chave: Agricultural science; Conflict; Ecology; Level; Methodology; Natural resource management; Scale; Social science; Sustainable agriculture.
Ano: 2008
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Coproductive capacities: rethinking science-governance relations in a diverse world Ecology and Society
van Kerkhoff, Lorrae E.; The Australian National University; lorrae.vankerkhoff@anu.edu.au; Lebel, Louis; Chiang Mai University, Thailand; llebel@loxinfo.co.th.
Tackling major environmental change issues requires effective partnerships between science and governance, but relatively little work in this area has examined the diversity of settings from which such partnerships may, or may not, emerge. In this special feature we draw on experiences from around the world to demonstrate and investigate the consequences of diverse capacities and capabilities in bringing science and governance together. We propose the concept of coproductive capacities as a useful new lens through which to examine these relations. Coproductive capacity is “the combination of scientific resources and governance capability that shapes the extent to which a society, at various levels, can operationalize relationships between...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Capacity development; Coproduction; Environmental governance; Environmental policy; Knowledge; Scale; Science-policy interface; Sustainable development.
Ano: 2015
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Exploring Strategies that Build Livelihood Resilience: a Case from Cambodia Ecology and Society
Marschke, Melissa J; York University; marschke@yorku.ca; Berkes, Fikret; University of Manitoba; berkes@cc.umanitoba.ca.
Livelihoods in Cambodian fishing communities are complex and dynamic. Fluctuations in resource abundance, seasonal cycles of resource use, and changes in access create conditions that bring challenges for rural households, as do economic and policy drivers. Nonetheless, people are continuously “doing something” in response to these stresses and shocks. This paper sets out to explore how households and community members attempt to mitigate against such challenges. The analysis of livelihood stresses and shocks in two Cambodian fishing villages shows that diversification is a commonly used strategy for coping and adapting. Analyzing responses at multiple scales, with emphasis on resilience-building strategies at household and community...
Tipo: Peer-Reviewed Reports Palavras-chave: Cambodia; Diversification; Livelihood; Resilience; Scale; Uncertainty; Well-being.
Ano: 2006
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Variability in Population Abundance is Associated with Thresholds between Scaling Regimes Ecology and Society
Wardwell, Donald; Nebraska Cooperative Fish and Wildlife Research Unit; don_wardwell@hotmail.com; Allen, Craig R; U.S. Geological Survey; Nebraska Cooperative Fish and Wildlife Research Unit; allencr@unl.edu.
Discontinuous structure in landscapes may result in discontinuous, aggregated species body-mass patterns, reflecting the scales of structure available to animal communities within a landscape. The edges of these body-mass aggregations reflect transitions between available scales of landscape structure. Such transitions, or scale breaks, are theoretically associated with increased biological variability. We hypothesized that variability in population abundance is greater in animal species near the edge of body-mass aggregations than it is in species that are situated in the interior of body-mass aggregations. We tested this hypothesis by examining both temporal and spatial variability in the abundance of species in the bird community of the Florida...
Tipo: Peer-Reviewed Reports Palavras-chave: Body mass; Breeding Bird Survey; Everglades; Phase transition; Scale; Textural discontinuity hypothesis.
Ano: 2009
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Scale mismatches and reflexive law Ecology and Society
Cumming, Graeme S.; University of Cape Town, South Africa; graeme.cumming@uct.ac.za.
Tipo: Peer-Reviewed article Palavras-chave: Democracy; Institution; Law; Reflexivity; Scale.
Ano: 2013
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Ecosystems and Immune Systems: Hierarchical Response Provides Resilience against Invasions Ecology and Society
Allen, Craig; University of Nebraska; allencr@unl.edu.
Tipo: Peer-Reviewed Reports Palavras-chave: Biological invasions; Complex systems; Cross-scale; Ecosystem management; Immune systems; Institutions; Resilience; Scale.
Ano: 2001
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Mismatch Between Scales of Knowledge in Nepalese Forestry: Epistemology, Power, and Policy Implications Ecology and Society
Ahlborg, Helene; Environmental Systems Analysis, Chalmers University of Technology; helene.ahlborg@chalmers.se; Nightingale, Andrea J.; Institute of Geography and the Lived Environment, School of GeoSciences, University of Edinburgh; School of Global Studies, University of Gothenburgh; andrea.nightingale@ed.ac.uk.
Tipo: Peer-Reviewed Reports Palavras-chave: Community forestry; Knowledge scales; Natural resource management; Nepal; Power; Scale.
Ano: 2012
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Tweak, Adapt, or Transform: Policy Scenarios in Response to Emerging Bioenergy Markets in the U.S. Corn Belt Ecology and Society
Atwell, Ryan C; Iowa State University, Department of Natural Resource Ecology and Management; ryancardiffatwell@gmail.com; Schulte, Lisa A; Iowa State University, Department of Natural Resource Ecology and Management; lschulte@iastate.edu; Westphal, Lynne M; U.S. Forest Service, Northern Research Station; lwestphal@fs.fed.us.
Tipo: Peer-Reviewed Reports Palavras-chave: Agriculture; Complexity; Ecosystem services; Iowa; Participatory; Perennials; Resilience; Scale; Social-ecological systems.
Ano: 2011
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Scale Mismatches in Social-Ecological Systems: Causes, Consequences, and Solutions Ecology and Society
Cumming, Graeme S; University of Florida; graeme@botzoo.uct.ac.za; Cumming, David H. M.; University of Zimbabwe; cumming@icon.co.zw; Redman, Charles L; Arizona State University; charles.redman@asu.edu.
Scale is a concept that transcends disciplinary boundaries. In ecology and geography, scale is usually defined in terms of spatial and temporal dimensions. Sociological scale also incorporates space and time, but adds ideas about representation and organization. Although spatial and temporal location determine the context for social and ecological dynamics, social-ecological interactions can create dynamic feedback loops in which humans both influence and are influenced by ecosystem processes. We hypothesize that many of the problems encountered by societies in managing natural resources arise because of a mismatch between the scale of management and the scale(s) of the ecological processes being managed. We use examples from southern Africa and the...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Scale; Scale mismatch; Conservation; Management; Ecosystem function; Sociological scale; Southern Africa.
Ano: 2006
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Diversity, flexibility, and the resilience effect: lessons from a social-ecological case study of diversified farming in the northern Great Plains, USA Ecology and Society
Tipo: Peer-Reviewed Reports Palavras-chave: Diversified farming system; Diversity; Drought; Resilience; Northern Great Plains USA; Scale; Slow variables; Social-ecological systems; Sustainable agriculture; Values-based supply chain.
Ano: 2014
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Landscape Change in the Southern Piedmont: Challenges, Solutions, and Uncertainty Across Scales Ecology and Society
Conroy, Michael J; USGS Cooperative Fish and Wildlife Research Unit; conroy@forestry.uga.edu; Allen, Craig; University of Nebraska; allencr@unl.edu; Peterson, James T; USGS Cooperative Fish and Wildlife Research Unit;; Pritchard, Lowell, Jr.; Emory University; lpritc2@emory.edu; Moore, Clinton T; ;.
The southern Piedmont of the southeastern United States epitomizes the complex and seemingly intractable problems and hard decisions that result from uncontrolled urban and suburban sprawl. Here we consider three recurrent themes in complicated problems involving complex systems: (1) scale dependencies and cross-scale, often nonlinear relationships; (2) resilience, in particular the potential for complex systems to move to alternate stable states with decreased ecological and/or economic value; and (3) uncertainty in the ability to understand and predict outcomes, perhaps particularly those that occur as a result of human impacts. We consider these issues in the context of landscape-level decision making, using as an example water resources and lotic...
Tipo: Peer-Reviewed Reports Palavras-chave: Piedmont; Adaptive management; Land use; Model; Resilience; Scale; Sprawl; Uncertainty; Urbanization; Water resources.
Ano: 2003
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Methods for Developing Multiscale Participatory Scenarios: Insights from Southern Africa and Europe Ecology and Society
Kok, Kasper; Wageningen University; Kasper.Kok@wur.nl; Biggs, Reinette (Oonsie); Council for Scientific and Industrial Research (CSIR); University of Wisconsin; biggs@wisc.edu; Zurek, Monika; Food and Agriculture Organization (FAO); zurek@fao.org.
Scenario planning is increasingly recognized as a useful tool for exploring change in social-ecological systems on decadal to centennial time horizons. In environmental decision making, scenario development tends to include participatory methods for engaging stakeholders and is conducted at multiple scales. This paper presents insights from participatory scenario development in two separate multiscale environmental assessments. We find that, to engage stakeholders at multiple scales, it is important that the issues explored at each scale be relevant and credible to stakeholders at that scale. An important trade-off exists between maintaining relevance to stakeholders at different scales and maintaining consistency across scales to allow for comparison of...
Tipo: Peer-Reviewed Insight Palavras-chave: Mediterranean; Multiscale scenario; Participation; Scale; Scenario; Southern Africa.
Ano: 2007
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Scale and Governance: Conceptual Considerations and Practical Implications Ecology and Society
Kok, Kasper; Land Dynamics Group, Wageningen University, Wageningen, The Netherlands; Kasper.Kok@wur.nl; Veldkamp, Tom (A.); Faculty of Geo-Information Science and Earth Observation, University of Twente, Enschede, The Netherlands;.
Policies have many unforeseen impacts on social-ecological systems at different levels of spatial and temporal scales. Partly because of this, both scale and governance have been and continue to be hotly debated and studied topics within many scientific disciplines. Although there are two distinct vocabularies, both communities seem to be struggling to come to terms with a shift that has common elements. This special feature has two types of contributions, three scoping papers, providing a state-of-the-art overview of the conceptual discussion, and six case study papers that set out to deal with the practicalities of combining scale and governance. The scoping papers strongly indicate that using the notion of complex systems, specifically the...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Governance; Scale; Social-ecological system.
Ano: 2011
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The Politics of Scale, Position, and Place in the Governance of Water Resources in the Mekong Region Ecology and Society
Lebel, Louis; USER, Chiang Mai University; louis@sea-user.org; Garden, Po; USER, Chiang Mai University; po@sea-user.org; Imamura, Masao; USER, Chiang Mai University; masao@sea-user.org.
The appropriate scales for science, management, and decision making cannot be unambiguously derived from physical characteristics of water resources. Scales are a joint product of social and biophysical processes. The politics-of-scale metaphor has been helpful in drawing attention to the ways in which scale choices are constrained overtly by politics, and more subtly by choices of technologies, institutional designs, and measurements. In doing so, however, the scale metaphor has been stretched to cover a lot of different spatial relationships. In this paper, we argue that there are benefits to understanding—and actions to distinguish—issues of scale from those of place and position. We illustrate our arguments with examples from the...
Tipo: Peer-Reviewed Reports Palavras-chave: Governance; Institutions; Knowledge; Mekong; Politics; Scale; Science; Water resources.
Ano: 2005
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Matching Social and Ecological Systems in Complex Ocean Fisheries Ecology and Society
Wilson, James A.; University of Maine; Jwilson@maine.edu.
This paper considers ocean fisheries as complex adaptive systems and addresses the question of how human institutions might be best matched to their structure and function. Ocean ecosystems operate at multiple scales, but the management of fisheries tends to be aimed at a single species considered at a single broad scale. The paper argues that this mismatch of ecological and management scale makes it difficult to address the fine-scale aspects of ocean ecosystems, and leads to fishing rights and strategies that tend to erode the underlying structure of populations and the system itself. A successful transition to ecosystem-based management will require institutions better able to economize on the acquisition of feedback about the impact of human...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Resource governance; Fisheries; Complex adaptive systems; Scale; Fishing effort; Decentralization; Governance institutions; Incentives; Multiscale governance; Fishing rights; Ecosystem management; Ecosystem-based management; Polycentric networks.
Ano: 2006
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Scale and Cross-Scale Dynamics: Governance and Information in a Multilevel World Ecology and Society
Cash, David W.; Massachusetts Executive Office of Environmental Affairs; david.cash@state.ma.us; Adger, W. Neil; University of East Anglia; N.Adger@uea.ac.uk; Berkes, Fikret; University of Manitoba; berkes@cc.umanitoba.ca; Garden, Po; Chiang Mai University; po@sea-user.org; Lebel, Louis; Chiang Mai University; llebel@loxinfo.co.th; Olsson, Per; Stockholm University; potto@system.ecology.su.se; Pritchard, Lowell; National Wildlife Federation; pritchard@nwf.org; Young, Oran; University of California; young@bren.ucsb.edu.
The empirical evidence in the papers in this special issue identifies pervasive and difficult cross-scale and cross-level interactions in managing the environment. The complexity of these interactions and the fact that both scholarship and management have only recently begun to address this complexity have provided the impetus for us to present one synthesis of scale and cross-scale dynamics. In doing so, we draw from multiple cases, multiple disciplines, and multiple perspectives. In this synthesis paper, and in the accompanying cases, we hypothesize that the dynamics of cross-scale and cross-level interactions are affected by the interplay between institutions at multiple levels and scales. We suggest that the advent of co-management structures and...
Tipo: Peer-Reviewed article Palavras-chave: Scale; Level; Cross-scale dynamics; Boundary organization; Co-management.
Ano: 2006
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Linking Resilience Theory and Diffusion of Innovations Theory to Understand the Potential for Perennials in the U.S. Corn Belt Ecology and Society
Atwell, Ryan C; Iowa State University; ryancardiffatwell@gmail.com; Schulte, Lisa A; Iowa State University; lschulte@iastate.edu; Westphal, Lynne M; U.S. Forest Service Northern Research Station; lwestphal@fs.fed.us.
In the last 200 yr, more than 80% of the land in the U.S. Corn Belt agro-ecosystem has been converted from natural perennial vegetation to intensive agricultural production of row crops. Despite research showing how re-integration of perennial vegetation, e.g., cover crops, pasture, riparian buffers, and restored wetlands, at strategic landscape positions can bolster declining regional ecosystem functions, the amount of land area devoted to row crop production in the Corn Belt continues to increase. As this region enters a time of fast-paced and uncertain reorganization driven by the emerging bioeconomy, changes in land use will continue to take place that will impact the resilience of the Corn Belt’s linked social and ecological systems for...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive co-management; Agriculture; Iowa; Learning; Nonpoint source pollution; Restoration; Scale; Social-ecological systems; Row crops; Corn Belt.
Ano: 2009
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