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| Registros recuperados: 154 | |
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| Ramírez García, Jazmin. |
| En la Red Hidrográfica del estado de Morelos el agua ocupa un lugar primordial, su disponibilidad y riqueza ha constituido un elemento de soporte básico para el desarrollo económico. Alrededor de 63000 hectáreas son irrigadas en Morelos y dado que las actividades agropecuarias, industriales y recreacionales compiten por este recurso, se hace necesario conocer las características químicas de las aguas y los efectos adversos sobre los terrenos en donde se aplican. Los objetivos de este trabajo fueron determinar las concentraciones iónicas del sistema y establecer índices para conocer el efecto sobre las propiedades físicas de los suelos. Se colectaron muestras de agua en 66 estaciones durante julio de 2007 y 78 en mayo de 2008 (primer y segundo muestreo... |
| Tipo: Tesis |
Palavras-chave: Calidad del agua; Riego; Eutrofización; Sodicidad; RAS; PSI; Maestría; Hidrociencias; Quality of the water; Watering; Eutrophication; Sodicity; SAR; ESP. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1621 |
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| Downing, Andrea S.; Stockholm Resilience Centre, Stockholm University, Sweden; Aquatic Ecology and Water Quality Management group, Wageningen University, Netherlands; Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands ; andrea.downing@su.se; van Nes, Egbert H.; Aquatic Ecology and Water Quality Management group, Wageningen University, Netherlands ; Egbert.vannes@wur.nl; Balirwa, John S.; National Fisheries Resources Research Institute (NaFIRRI), Jinja, Uganda; jbalirwa@yahoo.com; Beuving, Joost; Department of Cultural Anthropology and Development Studies, Faculty of Social Sciences, Radboud University, Nijmegen, Netherlands ; joostbeuving@gmail.com; Bwathondi, P.O.J.; University of Dar es Salaam, College of Natural and Applied Sciences, Department of Aquatic Sciences and Fisheries, Dar es Salaam, Tanzania ; bwathondi@yahoo.co.uk; Chapman, Lauren J.; Department of Biology, McGill University, Montreal, Canada; lauren.chapman@mcgill.ca; Cornelissen, Ilse J. M.; Aquaculture & Fisheries Group, Wageningen University, Netherlands; Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands; ilsecornelissen@hotmail.com; Cowx, Iain G.; Hull International Fisheries Institute, University of Hull, United Kingdom; I.G.Cowx@hull.ac.uk; Goudswaard, Kees P. C.; Institute for Marine Resource and Ecosystem Studies (IMARES), Wageningen University, Yerseke, Netherlands; kees.goudswaard@wur.nl; Hecky, Robert E.; Biology Department and Large Lakes Observatory, University of Minnesota-Duluth, USA; rehecky@gmail.com; Janse, Jan H.; Netherlands Environmental Assessment Agency (PBL), Bilthoven, Netherlands; Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands; JH.Janse@rivm.nl; Janssen, Annette B. G.; Aquatic Ecology and Water Quality Management group, Wageningen University, Netherlands; Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands; A.Janssen@nioo.knaw.nl; Kaufman, Les; Boston University Marine Program, Biology Department, Boston University, USA ; lesk@bu.edu; Kishe-Machumu, Mary A.; Tanzania Fisheries Research Institute (TAFIRI), Dar es Salaam, Tanzania; mkishe@yahoo.com; Kolding, Jeppe; Department of Biology, University of Bergen, Norway; jeppe.kolding@bio.uib.no; Ligtvoet, Willem; Netherlands Environmental Assessment Agency (PBL), The Hague, Netherlands; Willem.Ligtvoet@pbl.nl; Mbabazi, Dismas; National Fisheries Resources Research Institute (NaFIRRI), Jinja, Uganda; mbabazidismas@yahoo.com; Medard, Modesta; Department of Sociology of Development and Change. Social Science Group, Wageningen University, Netherlands ; modesta.medard@wur.nl; Mkumbo, Oliva C.; Lake Victoria Fisheries Organisation, Jinja, Uganda; ocmkumbo@lvfo.org; Mlaponi, Enock; Tanzania Fisheries Research Institute (TAFIRI), Mwanza, Tanzania; emlaponi@yahoo.com; Munyaho, Antony T.; National Fisheries Resources Research Institute (NaFIRRI), Jinja, Uganda; ataabum@yahoo.com; Nagelkerke, Leopold A. J.; Aquaculture & Fisheries Group, Wageningen University, Netherlands; leo.nagelkerke@wur.nl; Ogutu-Ohwayo, Richard; National Fisheries Resources Research Institute (NaFIRRI), Jinja, Uganda; ogutuohwayo@yahoo.com; Ojwang, William O.; Kenya Marine and Fisheries Research Institute (KMFRI), Kisumu, Kenya; w_ojwang@yahoo.com; Peter, Happy K.; Aquaculture & Fisheries Group, Wageningen University, Netherlands; Happy.Peter@wur.nl; Schindler, Daniel E.; Aquatic & Fishery Sciences/Department of Biology, University of Washington, USA; deschind@uw.edu; Seehausen, Ole; Eawag, Kastanienbaum, Switzerland; Ole.Seehausen@eawag.ch; Sharpe, Diana; Smithsonian Tropical Research Institute, Panama City, Panama; Department of Biology, McGill University, Montreal, Canada; diana.sharpe@gmail.com; Silsbe, Greg M.; Royal Netherlands Institute for Sea Research, Yerseke, Netherlands; Greg.Silsbe@nioz.nl; Sitoki, Lewis; The Technical University of Kenya, Nairobi, Kenya; Sitoki@hotmail.com; Tumwebaze, Rhoda; National Fisheries Resources Research Institute (NaFIRRI), Jinja, Uganda; t60rhoda@gmail.com; Tweddle, Denis; South African Institute for Aquatic Biodiversity, Grahamstown, South Africa; D.Tweddle@saiab.ac.za; van de Wolfshaar, Karen E.; Institute for Marine Resource and Ecosystem Studies (IMARES), Wageningen University, Ijmuiden, Netherlands; karen.vandewolfshaar@wur.nl; van Dijk, Han; Department of Sociology of Development and Change. Social Science Group, Wageningen University, Netherlands ; han.vandijk@wur.nl; van Donk, Ellen; Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands; E.vandonk@nioo.knaw.nl; van Rijssel, Jacco C.; Institute of Biology, University of Leiden, Netherlands; Naturalis Biodiversity Center, Leiden, Netherlands; Eawag, Kastanienbaum, Switzerland; j.c.van.rijssel@biology.leidenuniv.nl; van Zwieten, Paul A. M.; Aquaculture & Fisheries Group, Wageningen University, Netherlands; paul.vanzwieten@wur.nl; Wanink, Jan; Institute of Biology, University of Leiden, Netherlands; Koeman en Bijkerk bv, Ecological Research and Consultancy, Haren, Netherlands; j.h.wanink@koemanenbijkerk.nl; Witte, F.; Institute of Biology, University of Leiden, Netherlands; Naturalis Biodiversity Center, Leiden, Netherlands;; Mooij, Wolf M.; Aquatic Ecology and Water Quality Management group, Wageningen University, Netherlands; Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands ; w.mooij@nioo.knaw.nl. |
| East Africa’s Lake Victoria provides resources and services to millions of people on the lake’s shores and abroad. In particular, the lake’s fisheries are an important source of protein, employment, and international economic connections for the whole region. Nonetheless, stock dynamics are poorly understood and currently unpredictable. Furthermore, fishery dynamics are intricately connected to other supporting services of the lake as well as to lakeshore societies and economies. Much research has been carried out piecemeal on different aspects of Lake Victoria’s system; e.g., societies, biodiversity, fisheries, and eutrophication. However, to disentangle drivers and dynamics of change in this complex system, we need... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Eutrophication; Feedbacks; Fisheries; Lake Victoria; Model; Multidisciplinary social-ecological system; Sustainability. |
| Ano: 2014 |
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| Vermaat, Jan E; Earth Sciences and Economics, Faculty of Earth and Life Sciences, VU University; j.e.vermaat@vu.nl; Broekx, Steven; Flemish Institute for Technological Research (VITO); steven.broekx@vito.be; Van Eck, Bert; Deltares; Bert.vanEck@deltares.nl; Engelen, Guy; Flemish Institute for Technological Research (VITO); guy.engelen@vito.be; Hellmann, Fritz; Institute for Environmental Studies (IVM), VU University; f.a.hellmann@vu.nl; De Kok, Jean Luc; Flemish Institute for Technological Research (VITO); Jean-Luc.DeKok@vito.be; Van der Kwast, Hans; Flemish Institute for Technological Research (VITO); hans.vanderkwast@vito.be; Maes, Joachim; Joint Research Centre-European Commission; joachim.maes@jrc.ec.europa.eu; Salomons, Wim; Institute for Environmental Studies (IVM), VU University; wim.salomons@home.nl; Van Deursen, Willem; PCRaster; willem@pcraster.nl. |
| Using the systems approach framework (SAF), a coupled model suite was developed for simulating land-use decision making in response to nutrient abatement costs and water and nutrient fluxes in the hydrological network of the Scheldt River, and nutrient fluxes in the estuary and adjacent coastal sea. The purpose was to assess the efficiency of different long-term water quality improvement measures in current and future climate and societal settings, targeting nitrogen (N) load reduction. The spatial-dynamic model suite consists of two dynamically linked modules: PCRaster is used for the drainage network and is combined with ExtendSim modules for farming decision making and estuarine N dispersal. Model predictions of annual mean flow and total N... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Catchment hydrology; Coupled modeling; Estuary; Eutrophication; Land use; Systems analysis; Watershed nutrient loading. |
| Ano: 2012 |
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| Martin, Sophie; Cemagref; sophie.martin@cemagref.fr. |
| Multiple stable states or alternative equilibria in ecological systems have been recognized since the 1960s in the ecological literature. Very often, the shift between alternative states occurs suddenly and the resource flows from these systems are modified. Resilience is the capacity of a system to undergo disturbance and maintain its functions and controls. It has multiple levels of meaning, from the metaphorical to the specific. However, most studies that explore resilience-related ideas have used resilience as a metaphor or theoretical construct. In a few cases, it has been defined operationally in the context of a model of a particular system. In this paper, resilience is defined consistently with the theoretical uses of the term, in the context of... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Dynamic systems; Ecosystem models; Eutrophication; Lake ecosystem; Resilience; Time of crisis. |
| Ano: 2004 |
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| Dinesen, Grete E.; Coastal Ecology Section, National Institute of Aquatic Resources (DTU Aqua), Technical University of Denmark; gdi@aqua.dtu.dk; Timmermann, Karen; AU NERI, Roskilde;; Roth, Eva; SDU, Esbjerg;; Markager, Stiig; AU NERI, Roskilde;; Ravn-Jonsen, Lars; SDU, Esbjerg;; Hjorth, Morten; AU NERI, Roskilde;; Holmer, Marianne; SDU, Odense;. |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Aquaculture; Bioeconomical modeling; Blue mussels; Danish estuary; Eutrophication; Fishery; Integrated coastal system assessment; Stakeholder involvement. |
| Ano: 2011 |
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| O'Higgins, Tim; Scottish Association for Marine Science; Tim.O'Higgins@sams.ac.uk; Farmer, Andrew; Institute for European Environmental Policy; AFarmer@ieep.eu; Daskalov, Georgi; IBER-BAS;; Knudsen, Stale; University in Bergen; stale.knudsen@sosantr.uib.no; Mee, Laurence; Scottish Association for Marine Science; laurence.mee@sams.ac.uk. |
| The Black Sea has suffered severe environmental degradation. Governance of the Black Sea region is complex and results in a series of scale mismatches which constrain management. This paper develops a simple classification of spatial scale mismatches incorporating the driver, pressure, state, welfare, response (DPSWR) framework. The scale mismatch classification is applied to two major environmental problems of the Black Sea, eutrophication and small pelagic fisheries. A number of scale mismatches are described and classified and potential solutions are identified. |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Black Sea; Ecosystem approach; Eutrophication; Fisheries; Marine strategy framework directive; Scale mismatch. |
| Ano: 2014 |
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| Timmermann, Karen; Department of Bioscience, Aarhus University, Roskilde, Denmark; kti@dmu.dk; Dinesen, Grete E.; Section for Coastal Ecology, National Institute of Aquatic Science, Technical University of Denmark, Charlottenlund, Denmark; gdi@aqua.dtu.dk; Markager, Stiig; Department of Bioscience, Aarhus University, Roskilde, Denmark; markager@dmu.dk; Ravn-Jonsen, Lars; Department of Environmental and Business Economics, University of Southern Denmark, Esbjerg, Denmark; lrj@sam.sdu.dk; Bassompierre, Marc; Novo Nordisk A/S, Kalundborg, Denmark; mbass@post9.tele.dk; Roth, Eva; Department of Environmental and Business Economics, University of Southern Denmark, Esbjerg, Denmark; er@sam.sdu.dk. |
| Coastal ecosystems worldwide are under pressure from human-induced nutrient inputs, fishing activities, mariculture, construction work, and climate change. Integrated management instruments handling one or more of these problems in combination with socioeconomic issues are therefore necessary to secure a sustainable use of resources. In the Limfjord, a temperate eutrophic estuary in Denmark, nutrient load reductions are necessary to fulfill EU regulations such as the Water Framework Directive (WFD). The expected outcome of these load reductions is an improved water quality, but also reduced production of the abundant stock of filter-feeding blue mussels, Mytilus edulis. This is expected to have significant economic consequences for the million-euro mussel... |
| Tipo: Peer-Reviewed Synthesis |
Palavras-chave: Decision support system; Ecological-socioeconomic model; Eutrophication; Mussel production; Nutrient loading; Predictive models; System-based management; Water Framework Directive. |
| Ano: 2014 |
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| Carpenter, Stephen R; Center for Limnology, University of Wisconsin-Madison; srcarpen@wisc.edu; Booth, Eric G.; Department of Agronomy, University of Wisconsin-Madison; Department of Civil and Environmental Engineering, University of Wisconsin-Madison; egbooth@wisc.edu; Gillon, Sean; Department of Food Systems and Society, Marylhurst University; Department of Forest and Wildlife Ecology, University of Wisconsin-Madison; sgillon@marylhurst.edu; Kucharik, Christopher J.; Department of Agronomy, University of Wisconsin-Madison; Nelson Institute Center for Sustainability and the Global Environment, University of Wisconsin-Madison; kucharik@wisc.edu; Loheide, Steven; Department of Civil and Environmental Engineering, University of Wisconsin-Madison; Loheide@wisc.edu; Mase, Amber S.; Department of Forest and Wildlife Ecology, University of Wisconsin-Madison; Mase@wisc.edu; Motew, Melissa; Nelson Center for Sustainability and the Global Environment, University of Wisconsin-Madison; Motew@wisc.edu; Qiu, Jiangxiao; Department of Zoology, University of Wisconsin-Madison; jqiu7@wisc.edu; Rissman, Adena R; Department of Forest and Wildlife Ecology, University of Wisconsin-Madison; ARRissman@wisc.edu; Seifert, Jenny; Center for Limnology, University of Wisconsin-Madison; JSeifert2@wisc.edu; Soylu, Evren; Department of Civil Engineering, Meliksah University; Nelson Institute for Sustainability and the Global Environment, University of Wisconsin-Madison; evrensoylu@gmail.com; Turner, Monica; Department of Zoology, University of Wisconsin-Madison; turnermg @ wisc.edu; Wardropper, Chloe B; Nelson Institute for Environmental Studies, University of Wisconsin-Madison; Wardropper@wisc.edu. |
| Agricultural watersheds are affected by changes in climate, land use, agricultural practices, and human demand for energy, food, and water resources. In this context, we analyzed the agricultural, urbanizing Yahara watershed (size: 1345 km², population: 372,000) to assess its responses to multiple changing drivers. We measured recent trends in land use/cover and water quality of the watershed, spatial patterns of 10 ecosystem services, and spatial patterns and nestedness of governance. We developed scenarios for the future of the Yahara watershed by integrating trends and events from the global scenarios literature, perspectives of stakeholders, and models of biophysical drivers and ecosystem services. Four qualitative scenarios were created to... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Alternative futures; Climate; Ecosystem services; Eutrophication; Governance; Lakes; Land-use change; Phosphorus; Scenarios. |
| Ano: 2015 |
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| Rabalais,Nancy N. |
| The seasonal formation of a bottom-water layer severely depleted in dissolved oxygen has become a perennial occurrence on the Louisiana continental shelf adjacent to the Mississippi River system. Dramatic changes have occurred in this coastal ecosystem in the last half of the 20th century as the loads of dissolved inorganic nitrogen tripled. There are increases in primary production, shifts in phytoplankton community composition, changes in trophic interactions, and worsening severity of hypoxia. The river-influenced continental shelf is representative of similar ecosystems in which increased nutrient flux to the coastal ocean has resulted in eutrophication and subsequently hypoxia. The hypoxic conditions (dissolved oxygen less than 2 mg L-1) cover up to... |
| Tipo: Journal article |
Palavras-chave: Anoxia; Hypoxia; Eutrophication; Nutrients; Nitrogen. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300015 |
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| Naqvi,S.W.A. |
| The Indian Ocean contains one of the oceans' most pronounced oxygen minimum zones (OMZ), which, anomalously, is the most intense in the northwestern sector (Arabian Sea). It also contains the majority of the area of oceanic continental margins in contact with oxygen-depleted waters. Impacts of the oxygen deficiency on regional biogeochemistry, especially anaerobic nitrogen transformations, are described. A comparison of the perennial, mesopelagic OMZ in the open Northwestern Indian Ocean is made with a shallower oxygen deficient system that develops seasonally (during late summer and autumn) over the western Indian shelf. The latter appears to have intensified in recent years presumably due to anthropogenic nutrient loading from land. |
| Tipo: Journal article |
Palavras-chave: Indian Ocean; Nitrogen cycling; Denitrification; N2O; Eutrophication. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300011 |
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| Registros recuperados: 154 | |
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