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| Registros recuperados: 23 | |
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| Wild,Anna-Katharina; Marx,Michael Thomas; Eisenbeis,Gerhard. |
| Micro, macro and mesofauna in the soil often respond to fluctuating environmental conditions, resulting in changes of abundance and community structure. Effects of changing soil parameters are normally determined with samples taken in the field and brought to the laboratory, i.e. where natural environmental conditions may not apply. We devised a method (STAFD - soil tubes for artificial flood and drought), which simulates the hydrological state of soil in situ using implanted cores. Control tubes were compared with treatment tubes in which floods of 15, 30, 60 and 90 days, and droughts of 60, 90 and 120 days were simulated in the field. Flooding and drought were found to reduce number of individuals in all soil faunal groups, but the response to drought... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climate change; Drought; Flooding; Soil invertebrates; Soil tubes; STAFD method. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800007 |
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| Marins,Josy Fraccaro de; Carrenho,Rosilaine. |
| ABSTRACT There have been several reports of symbionts in the roots of plants that live in aquatic environments. Arbuscular mycorrhizal fungi (AMF) are the most common microsymbionts and possibly recolonized the aquatic environment together with plants; however, their functions and the extent of their benefits are unclear. Furthermore, the presence of other groups of fungi, such as dark septate fungi (DSF), with functions supposedly analogous to those of mycorrhizal fungi, has also been reported. The present work provides a compilation of data regarding the presence of arbuscular mycorrhizae in plants from, or under the influence of, aquatic environments, and co-colonization by AMF and DSF. Forty species of non-vascular plants, ferns, fern allies, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colonization; Flooding; Fungal co-occurrence; Macrophytes; Taxonomic diversity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200295 |
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| Jiménez Cruz, David Mauricio. |
| En la zona de riego abastecida por la derivadora Dique Alto del Módulo Corralejo del Distrito de Riego 011 “Alto Río Lerma”, Guanajuato se han presentando problemas de abastecimiento de agua en periodos de estiaje y problemas de inundación en las comunidades cercanas en las épocas de lluvia. Como una solución al suministro de agua para riego, se conduce agua a través del dren Munguía que llega al río Turbio y luego se lleva hasta la derivadora Dique Alto; sin embargo, el azolvamiento del río Turbio ha propiciado inundaciones en poblaciones cercanas aguas arriba de dicha derivadora cuando sube el nivel del agua en el río. Para dar solución a los problemas planteados anteriormente, se realizaron los estudios del presente trabajo en el Colegio de... |
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Palavras-chave: Munguía; Inundaciones; Vertedor; Cárcamo de bombeo; Flooding; Spillway; Pumping station; Hidrociencias; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/1897 |
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| Wernstedt, Kris; Hersh, Robert. |
| We examine the use of El Nino-Southern Oscillation (ENSO) forecasts for flood planning in the Pacific Northwest. Using theories of resource mobilization as a conceptual foundation, the paper relies on: 1) case studies of three communities vulnerable to flooding that have had access to long-term forecasts of ENSO conditions; and 2) analysis of data collected from a survey of nearly 60 local emergency managers, planners, and public works staff. We find that understanding the regulatory machinery and other institutions involved in using climate forecasts is critical to more effective use of these forecasts. Forecast use could be promoted by: 1) an extension service to broker climate information; 2) the identification or creation of federal authorities to fund... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Flooding; ENSO; La Nina; Climate variability; Climate forecast; Natural hazards; Water policy; Resource /Energy Economics and Policy; Q2. |
| Ano: 2002 |
URL: http://purl.umn.edu/10813 |
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| Herrera,Ana; Escala,Marcia; Rengifo,Elizabeth. |
| In trees of the seasonally flooded forest of the Mapire River in Venezuela, early flooding induces a reversible diminution in leaf conductance and photosynthetic rate. With the aim of finding an anatomical explanation for the observed responses of leaf gas exchange, the characteristics of emerged leaves developed under drainage or after three months of flooding were examined in the tree species Acosmium nitens, Campsiandra laurifolia, Duroia fusifera, Eschweilera tenuifolia, Pouteria orinocoensis and Symmeria paniculata and in leaves developed only under flooding in Inga spuria and Tachigali davidsei. Anatomy was remarkably similar among species and families and consisted of a bi-layered palisade parenchyma, a 5-6-cell-thick spongy parenchyma and large... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flooding; Palisade; Parenchyma; Sclerenchyma; Spongy; Stomata; Tropical trees. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000400006 |
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| Romero Bautista, Alejandro. |
| El desarrollo sostenible de una nación no considera separación entre los factores económicos, ecológicos, sociales, políticos y culturales. Al tratarse de la conservación y buen manejo del recurso hídrico, es indispensable la convergencia de dichos factores. En México, es necesaria la construcción de nuevas y mejores relaciones entre la política hídrica y la urbana, dado el deterioro de las fuentes de agua de las que depende la mayor parte de los habitantes. Aquí se argumenta la existencia y aplicación de herramientas de análisis y gestión viables, con las que, es posible generar un modelo de desarrollo urbano acorde con la disponibilidad y sustentabilidad de los recursos naturales para la cuenca del Río de las Avenidas de Pachuca. En forma general, los... |
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Palavras-chave: Avenidas máximas; Inundaciones; Agua subterránea; Cambio climático; Sistemas de información geográfica; Proyecto PLATAH; Hidrociencias; Doctorado; Maximum floods; Flooding; Groundwater; Climate change; Geographic information sistem; Project PLATAH. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1813 |
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| ASGARPOUR,R.; GHORBANI,R.; KHAJEH-HOSSEINI,M.; GOLZARDI,F.; ILKAEE,M.N.. |
| ABSTRACT: Seed longevity under different environmental conditions is considered as one of the most important factors in the spread and persistence of an exotic species. The Experiments were conducted to determine seed persistence in soil, effects of submergence in water, flooding of the soil, and high temperatures on germination and viability of spotted spurge (Chamaesyce maculata) and wild poinsettia (Euphorbia heterophylla) as two exotic species in different regions of Golestan province. Spotted spurge seeds buried at depth of 10 cm maintained their viability above 95% after a year, while wild poinsettia seeds were destroyed completely after exhuming the soil. Seeds of both species were unable to germinate under submergence, but 92% of the spotted spurge... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chamaesyce maculata; Euphorbia heterophylla; Fire; Flooding; Seedbank; Seed persistence. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100202 |
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| Silva,Adriane Schio; Laura,Valdemir Antônio; Jank,Liana. |
| The soil flood tolerance of seven genotypes of Panicum maximum Jacq. (PM11, PM34, PM40 and PM45, and the commercial cultivars Massai, Mombaça and Tanzânia) was evaluated in plants subjected to two conditions: flooded and not flooded, during a period of 14 days. Flooding significantly decreased the total and above ground biomass of PM40 and PM45. For cultivar Tanzânia, flooding decreased these two variables and also root biomass. The root, total and above ground relative growth rates were significantly reduced by flooding in cultivar Tanzânia, while in PM45 only the above ground relative growth rate was reduced. Cultivar Tanzânia showed significant differences for all variables analyzed, thus was not flood tolerant, as well as PM40 and PM45. It could be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anoxia; Flooding; Forage grass. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600004 |
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| Shultz, Steven D.; Leitch, Jay A.. |
| The economic feasibility of alternative wetland restoration activities to store water and reduce flood damage was evaluated in the Maple River Watershed, North Dakota, a sub-watershed of the Red River of the North Watershed. The evaluation was based on recent hydrologic modeling and wetland restoration studies, the National Wetland Inventory, local land rental values, and site-specific historical flood damage. With benefit-cost ratios ranging from 0.08 to 0.13, neither simple wetland restoration based on plugging existing drains, nor restoration with outlet control devices, nor complete restoration intended to provide a full range of wetland-based environmental services were economically feasible over a 20-year future period. Peak flood stages and flood... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Economic feasibility; Wetland restoration; Flooding; Red River Valley; Land Economics/Use. |
| Ano: 2001 |
URL: http://purl.umn.edu/23597 |
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| Registros recuperados: 23 | |
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