59 research outputs found

    Asuntos ambientales en la frontera México-Estados Unidos: temas y acciones

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    Governing a shared hidden resource: A review of governance mechanisms for transboundary groundwater security

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    © 2017 Elsevier B.V. Globally, groundwater is by far the largest store of liquid freshwater, making it a key component of a secure water supply. However, over the past few decades the amount of usable groundwater available around the world has rapidly decreased. This depletion is caused primarily by mismanagement (e.g., overpumping, contamination, and under-regulation), but also by reduced natural recharge due to climate change and urbanization. Management of groundwater resources is particularly challenging for the nearly 600 aquifers that are transboundary, meaning that they extend across international political borders. To understand how governance mechanisms can reduce water insecurity in transboundary groundwater contexts, we review key literature from what we view as the most relevant fields: groundwater management, water security, international water law and international water governance. We then formulate a set of recommendations for improved groundwater governance that can address the specific physical nature of groundwater systems, enhance water security, and apply to transboundary groundwater settings. We argue that groundwater governance in transboundary contexts requires processes that (1) enhance context-specific and flexible international mechanisms; (2) address the perpetual need for groundwater data and information; (3) prioritize the precautionary principle and pollution prevention, in particular; (4) where appropriate, integrate governance of surface and subsurface water and land; and (5) expand institutional capacity, especially of binational or multinational actors

    Societal Adaptation to Decadal Climate Variability in the United States

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    The search for evidence of decadal climatic variability (DCV) has a very long history. In the past decade, a research community has coalesced around a series of roughly biennial workshops that have emphasized description of past DCV events; their causes and their teleconnections responsible for droughts, floods, and warm and cold spells around the world; and recently, the predictability of DCV events. Researchers studying climate change put great emphasis on prospective impacts, but the DCV community has yet to do so. To begin rectifying this deficiency, a short but ambitious workshop was convened in Waikoloa, near Kona, Hawaii, from 26-28 April 2007. This workshop, sponsored by the Center for Research on the Changing Earth System (CRCES), NOAA, the U.S. Geological Survey, and the U.S. Army Corps of Engineers, brought together climatologists and sectoral specialists representing agriculture, water resources, economics, the insurance industry, and developing country interests

    Dialogic science-policy networks for water security governance in the arid Americas

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    Addressing wicked problems challenging water security requires participation from multiple stakeholders, often with conflicting visions, complicating the attainment of water-security goals and heightening the need for integrative and effective science-policy interfaces. Sustained multi-stakeholder dialogues within science-policy networks can improve adaptive governance and water system resilience. This paper describes what we define as “dialogic science-policy networks,” or interactions -- both in structural and procedural terms -- between scientists and policy-makers that are: 1) interdisciplinary, 2) international (here, inter-American), 3) cross-sectoral, 4) open, 5) continual and iterative in the long-term, and 6) flexible. By fostering these types of interactions, dialogic networks achieve what we call the 4-I criteria for effective science-policy dialogues: inclusivity, involvement, interaction, and influence. Here we present several water-security research and action projects where some of these attributes may be present. Among these, a more comprehensive form of a dialogic network was intentionally created via AQUASEC, a virtual center and network initially fostered by a series of grants from the Inter-American Institute for Global Change Research. Subsequently, AQUASEC has significantly expanded to other regions through direct linkages and additional program support for the International Water Security Network, supported by Lloyd's Register Foundation and other sources. This paper highlights major scientific and policy achievements of a notable suite of science-policy networks, shared practices, methods, and knowledge integrating science and policy, as well as the main barriers overcome in network development. An important gap that remains for future research is the assessment and evaluation of dialogic science-policy networks' long-term outcomes.Fil: Lutz Ley, America N.. El Colegio de Sonora; MéxicoFil: Scott, Christopher A.. University of Arizona; Estados UnidosFil: Wilder, Margaret. University of Arizona; Estados UnidosFil: Varady, Robert G.. University of Arizona; Estados UnidosFil: Ocampo Melgar, Anahi. Universidad de Chile.; ChileFil: Lara Valencia, Francisco. Arizona State University; Estados UnidosFil: Zuniga Teran, Adriana. University of Arizona; Estados UnidosFil: Buechler, Stephanie. University of Arizona; Estados UnidosFil: Díaz Caravantes, Rolando. El Colegio de Sonora; MéxicoFil: Ribeiro Neto, Alfredo. El Colegio de Sonora; MéxicoFil: Pineda Pablos, Nicólas. El Colegio de Sonora; MéxicoFil: Martin, Facundo Damian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ciencias Humanas, Sociales y Ambientales; Argentin

    Do ecosystem insecurity and social vulnerability lead to failure of water security?

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    Achieving water security for humans and ecosystems is a pervasive challenge globally. Extensive areas of the Americas are at significant risk of water insecurity, resulting from global-change processes coupled with regional and local impacts. Drought, flooding, and water quality challenges pose significant threats, while at the same time, rapid urban expansion, competing water demands, river modifications, and expanding global markets for water-intensive agricultural products drive water insecurity. This paper takes a social-ecological systems perspective, aiming to identify examples and pathways towards resilient ecosystems and social development. It draws on lessons from two science-policy network projects, one focusing on water scarcity in arid and semi-arid regions of Argentina, Chile, Brazil, Peru, Mexico and the United States; and the second addressing river and lake basins as sentinels of climate variability and human effects on water quantity and quality in Canada, the United States, Argentina, Colombia, Uruguay and Chile. Together, these ?complementary contrasts? provide an analytical basis to empirically examine stakeholder engagement, knowledge co-production and science-policy interaction supporting decision-making to achieve water security. The paper identifies four tenets for decision-making based on water-security-focused global-change science in the Americas: 1) Decision makers should focus on protecting ecosystems because water security (along with food and energy security) depend on them; 2) Water-use and allocation decisions ought to be made considering future environmental and societal vulnerabilities, especially climate projections; 3) Holistic approaches (at basin or other appropriate levels) are best suited to ensure social-ecological system resilience and reduce vulnerability; and 4) It is essential to support local/traditional livelihoods, and underserved populations to achieve equitable water security and ecosystem resilience.Fil: Scott, Christopher A.. University of Arizona; Estados UnidosFil: Zilio, Mariana Ines. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Harmon, Thomas Christopher. University of California; Estados UnidosFil: Zuniga Teran, Adriana. University of Arizona; Estados UnidosFil: Díaz Caravantes, Rolando. El Colegio de Sonora; MéxicoFil: Hoyos, Natalia. Universidad del Norte; ColombiaFil: Perillo, Gerardo Miguel E.. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Meza, Andrés Francisco. Pontificia Universidad Católica de Chile; ChileFil: Varady, Robert G.. University of Arizona; Estados UnidosFil: Neto, Alfredo Ribeiro. Universidade Federal da Bahia; BrasilFil: Velez, Maria Isabel. University Of Regina; CanadáFil: Martin, Facundo Damian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ciencias Humanas, Sociales y Ambientales; ArgentinaFil: Escobar, Jaime. Universidad del Norte; ColombiaFil: Piccolo, Maria Cintia. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mussetta, Paula Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ciencias Humanas, Sociales y Ambientales; ArgentinaFil: Montenegro, Suzana. Universidade Federal de Pernambuco; BrasilFil: Rusak, James A.. Ontario Ministry Of The Environment; CanadáFil: Pineda, Nicolas. El Colegio de Sonora; Méxic

    Impact of caloric and dietary restriction regimens on markers of health and longevity in humans and animals: a summary of available findings

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    Considerable interest has been shown in the ability of caloric restriction (CR) to improve multiple parameters of health and to extend lifespan. CR is the reduction of caloric intake - typically by 20 - 40% of ad libitum consumption - while maintaining adequate nutrient intake. Several alternatives to CR exist. CR combined with exercise (CE) consists of both decreased caloric intake and increased caloric expenditure. Alternate-day fasting (ADF) consists of two interchanging days; one day, subjects may consume food ad libitum (sometimes equaling twice the normal intake); on the other day, food is reduced or withheld altogether. Dietary restriction (DR) - restriction of one or more components of intake (typically macronutrients) with minimal to no reduction in total caloric intake - is another alternative to CR. Many religions incorporate one or more forms of food restriction. The following religious fasting periods are featured in this review: 1) Islamic Ramadan; 2) the three principal fasting periods of Greek Orthodox Christianity (Nativity, Lent, and the Assumption); and 3) the Biblical-based Daniel Fast. This review provides a summary of the current state of knowledge related to CR and DR. A specific section is provided that illustrates related work pertaining to religious forms of food restriction. Where available, studies involving both humans and animals are presented. The review includes suggestions for future research pertaining to the topics of discussion

    Editorial comment: ‘Exploring transdisciplinary discourses’ – Has the Drakensberg conference measured up to its promise?

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    “Exploring Transdisciplinary Discourses: Water, Society and the Environment in Africa” Drakensberg, South Africa, 20-24 April 2008. Organized by North- West University, In collaboration with the International Water History Association (IWHA) and the Water Research Commission (WRC)
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