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| Registros recuperados: 28 | |
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| Druschke, Caroline Gottschalk; University of Rhode Island; cgd@uri.edu; Hychka, Kristen C.; U.S. EPA, Atlantic Ecology Division; khychka@gmail.com. |
| We look to a particular social-ecological system, the restoration community in Rhode Island, USA and the rivers, wetlands, marshes, and estuaries they work to protect, to draw connections between communication, community involvement, and ecological restoration project success. Offering real-world examples drawn from interviews with 27 local, state, federal, and nonprofit restoration managers, we synthesize the mechanisms that managers found effective to argue that the communication employed by resource managers in each phase of the restoration process, in prioritization, implementation, and monitoring, and for garnering broad-based support, shapes the quality of public engagement in natural resources management, which, in turn, can impact the stakeholder,... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Adaptive comanagement; Adaptive management; Communication; Discourse analysis; Natural resource management; Public engagement; Public participation; Restoration; River; Stakeholder engagement; Water. |
| Ano: 2015 |
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| Holmqvist, Daniel; Vindel River Fishery Advisory Board; daniel.holmqvist@lycksele.se. |
| Some ecological restoration projects include elements of trial and error where new measures are repeatedly tried, evaluated, and modified until satisfactory results are achieved. Thereafter, the resulting methods may be applied on larger scales. A difficult step is judging whether developed “best-practice” methods have become reasonably ecologically functional or whether further experimentation “demonstration” methods can lead to yet better results. Here, we use a stream restoration project as a case study for evaluating methods and abiotic effects and outlining stakeholder support for demonstration restoration measures, rather than only using best-practice methods. Our work was located in the Vindel River system, a... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Boulders; Large wood; Northern Sweden; Restoration; River; Stream; Timber floating. |
| Ano: 2013 |
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| SIMPOSIO SOBRE RECURSOS NATURAIS E SOCIO-ECONOMICOS DO PANTANAL, 1., 1984, Corumba.. |
| A publicacao do evento apresenta temas sobre recursos naturais, mostrando a pesquisa desenvolvida no Pantanal, enfocando o sistema climatico, hidrologia, aspectos geologicos e geomorfologicos, solos, vegetacao, flora, fauna, os problemas e perspectivas socio-economicos, propostas de politicas de desenvolvimento da regiao. Sumario - O sistema climatico do Pantanal: compreensao do sistema a definicao de prioridades de pesquisa climatologica. Condicoes climaticas para a regiao do Pantanal Mato-Grossense. Hidrologia da Bacia do Alto Paraguai. A dinamica das inundacoes no Pantanal. Aspectos geologicos do Pantanal Mato-Grossense e de sua area de influencia. Contribuicao da geomorfologia para o conhecimento e valorizacao do Pantanal. Solos do Pantanal... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Congresso; Mato Grosso do Sul; Recurso socio-economico; Recursos hidricos; Natural resource; Socio-economic resource; River; Congress.; Climatologia; Fauna; Flora; Geomorfologia; Geologia; Recurso Natural; Solo; Vegetação.; Brazil; Pantanal; Climatology; Geomorphology; Geology; Soil; Vegetation.. |
| Ano: 1986 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787689 |
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| Schafer, J; Blanc, Gerard; Audry, S; Cossa, Daniel; Bossy, C. |
| Dissolved and particulate Hg fluxes in the Lot-Garonne-Gironde fluvial-estuarine system were obtained from observation of daily discharge and suspended particulate matter (SPM) concentrations. In addition to the measurements of the total dissolved (< 0.45 gm) and particulate Hg (> 0.45 gm), called HgTD and HgTp respectively, the dissolved inorganic Hg species (HgRD) were determined monthly. Geochemical background values for HgTp in sediments and SPM were similar to crustal values and to typical concentrations in SPM of non-contaminated river systems, respectively. The Riou Mort watershed already known as the origin of important historical polymetallic (e.g., Cd, Zn) pollution was identified as an important Hg point source. In the downstream Lot... |
| Tipo: Text |
Palavras-chave: Lot; Garonne; SPM; River; Organic matter; Mercury. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1343.pdf |
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| Toomey, Michael; Cantwell, Meagan; Colman, Steven; Cronin, Thomas; Donnelly, Jeffrey; Giosan, Liviu; Heil, Clifford; Korty, Robert; Marot, Marci; Willard, Debra. |
| The hazards posed by infrequent major floods to communities along the Susquehanna River and the ecological health of Chesapeake Bay remain largely unconstrained due to the short length of streamgage records. Here we develop a history of high‐flow events on the Susquehanna River during the late Holocene from flood deposits contained in MD99‐2209, a sediment core recovered in 26 m of water from Chesapeake Bay near Annapolis, Maryland, USA. We identify coarse‐grained deposits left by Hurricane Agnes (1972) and the Great Flood of 1936, as well as during three intervals that predate instrumental flood records (~1800‐1500, 1300‐1100 and 400‐0 CE). Comparison to sedimentary proxy data (pollen and ostracode Mg/Ca ratios) from the same core site indicate that... |
| Tipo: Text |
Palavras-chave: Hurricane; Flood; Holocene; East coast; River; Chesapeake. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00483/59447/62291.pdf |
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| Rondeau, B; Cossa, Daniel; Gagnon, P; Pham, T; Surette, C. |
| Surface water samples from the St. Lawrence River were collected in order to study the processes controlling minor and trace elements concentrations (Al, Fe, Mn, Cd, Co, Cu, Ni and Zn), and to construct mass balances allowing estimates of the relative importance of their natural and anthropogenic sources. The two major water inputs, the upper St. Lawrence River, which drains waters originating from the Lake Ontario, and the Ottawa River were collected fortnightly over 18 months. In addition, other tributaries were sampled during the spring floods. The output was monitored near Quebec City at the river mouth weekly between 1995 and 1999. Dissolved metal concentrations in the upper St. Lawrence River carbonated waters were lower than in the acidic waters of... |
| Tipo: Text |
Palavras-chave: St. Lawrence; Mass balance; River; Biogeochemistry; Trace element. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-1357.pdf |
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| Bru, Noelle; Prouzet, Patrick; Lejeune, Michel. |
| The European eel (Anguilla anguilla) is drastically declining in all its distribution area and listed in the red list of the IUCN (International Union for Conservation of Nature). A rebuilding plan was adopted at European level in 2007, Regulation R(CE) 100/2007, to restore eel abundance to the level observed during the seventies. Its implementation started on the 1(st) of January 2009. This species is heavily threatened by numerous activities including fishing, and its management can only be effective through a systemic approach minimizing the whole range of human-induced impacts on the resource and its habitat. In the framework of the European interregional programme INTERREG IIIB-Atlantic Area-the INDICANG project aimed at elaborating abundance... |
| Tipo: Text |
Palavras-chave: Biomass estimates; Exploitation rate; Time series; River; Glass eel; Anguilla anguilla. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00000/11170/7526.pdf |
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| Prego, R; Vergara, J. |
| Nutrient fluxes to the Bay of Biscay from the Cantabrian basin have been quantified for the first time. Data between 1981 and 1995 of the main 16 Cantabrian rivers from the COCA monitoring programme have been used. Values of water flow and dissolved inorganic nitrogen (DIN), phosphate and silicate concentrations have been taken. Equations are proposed to quantify the fluvial nutrient contributions to the Cantabrian Sea. The annual average of continental outputs to the Bay of Biscay from the Cantabrian basin is 16.1 x 10(9) m(3) of freshwater, 1.0 x 10(9) mol of N in DIN, 0.062 x 10(9) mol of phosphate and 1.2 x 10(9) mol of silicate. In comparison with the French rivers, those of the Cantabrian have small fluxes and their outflow is very disperse, not... |
| Tipo: Text |
Palavras-chave: Nitrate; Phosphate; Silicate; Fleuve; Côte Cantabrique; Nitrate; Phosphate; Silicate; River; Cantabrian coast. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00326/43685/43190.pdf |
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| Fechner, Lise C.; Versace, Francois; Gourlay-france, Catherine; Tusseau-vuillemin, Marie-helene. |
| The Water Framework Directive requires the development of biological tools which can act as early-warning indicators of a sudden increase (accidental pollution) or decrease (recovery due to prevention) of the chemical status of aquatic systems. River biofilms, which respond quickly to modifications of environmental parameters and also play a key part in the functioning of aquatic ecosystems, are therefore good candidates to monitor an increase or a decrease of water pollution. In the present study, we investigated the biological response of biofilms transplanted either upstream (recovery) or downstream (deterioration of exposure levels) the urban area of Paris (France). Both modifications of Cu community tolerance levels and of global bacterial and... |
| Tipo: Text |
Palavras-chave: River; Biofilm; PICT; ARISA; Urban contamination; Transplantation. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00070/18129/16053.pdf |
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| Escoube, Raphaelle; Rouxel, Olivier; Pokrovsky, Oleg S.; Schroth, Andrew; Holmes, Robert Max; Donard, Olivier F. X.. |
| The input of iron to the Arctic Ocean plays a critical role in the productivity of aquatic ecosystems and is potentially impacted by climate change. We examine Fe isotope systematics of dissolved and colloidal Fe from several Arctic and sub-Arctic rivers in northern Eurasia and Alaska. We demonstrate that the Fe isotopic (δ56Fe) composition of large rivers, such as the Ob’ and Lena, has a restricted range of δ56Fe values ca.–0.11 ± 0.13‰, with minimal seasonal variability, in stark contrast to smaller organic-rich rivers with an overall δ56Fe range from–1.7 to + 1.6‰. The preferential enrichment with heavy Fe isotopes observed in low molecular weight colloidal fraction and during the high-flow period is consistent with the role of organic complexation of... |
| Tipo: Text |
Palavras-chave: Iron isotope; Colloids; River; Weathering; Arctic; Iron speciation. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00273/38402/36865.pdf |
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| McMahan,Caleb D.; Matamoros,Wilfredo A.; Elías,Diego J.; Piller,Kyle R.. |
| ABSTRACT Pacific and Atlantic-slope rivers of the Isthmus of Tehuantepec in Mexico contain two cichlid species of the genus Vieja relevant to the current study, V. zonata and V. coatlicue, respectively. The Atlantic-slope species was initially considered a population of uncertain taxonomic status and recently described as a distinct species based on three putatively diagnostic morphological characters. The objective of this study was to combine new and existing genetic data, along with reanalysis of morphological characters, to test the distinctiveness of V. coatlicue. Little genetic variability and no geographic structuring were recovered. Additionally, putatively diagnostic morphological character states were present across both species, failing to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cichlid; Freshwater; Mexico; River; Taxonomy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000200204 |
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| Mol,Jan H.; Mérona,Bernard de; Ouboter,Paul E.; Sahdew,Shamita. |
| We investigated long-term changes in the fish fauna of Brokopondo Reservoir, Suriname, the first large reservoir (1560 km²) that was created in tropical rainforest. Before closure of the dam in 1964, the fish fauna of Suriname River had 172 species, high diversity and high evenness. The riverine fauna was dominated by small-sized species, but no single species was dominant in numbers. Large catfishes were dominant in biomass. Species were evenly distributed over riverine habitats: rapids, tributaries and main channel. Four years after closure of the dam, only 62 fish species were collected from Brokopondo Reservoir, but the composition of the fish fauna was still changing. The reservoir fauna in 1978 was very similar to the reservoir fauna in 2005,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dam; Man-made lake; Neotropical; River; Fish community. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300015 |
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| Baisre, J. A.; Arboleya, A.. |
| Over the last decade eutrophication of freshwater artificial reservoirs in Cuba occurred in parallel to oligotrophication of estuarine and coastal waters. These two processes influenced both freshwater and marine fisheries. A dramatic shift in species composition in freshwater fisheries has occurred, from dominance by cichlids (tilapia) to dominance by cyprinids. The high fishery yield from some reservoirs, and shift in species composition, seems related to progressive eutrophication of reservoirs by nutrient subsidies from different anthropogenic activities; particular those related to the size of urban areas within their watersheds. On the other hand, marine landings of estuarine-dependent species declined more significantly than for other groups... |
| Tipo: Journal Contribution |
Palavras-chave: Fisheries; Eutrophication; River. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/5110 |
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| Meire, P.. |
| Habitat verlies en degradatie is één van de belangrijke ecologische problemen van deze eeuw. Hoewel alle ecosystemen hieronder te lijden hebben, blijken wetlands of waterrijke gebieden, op wereldschaal vrij zeldzame gebieden, onder zeer zware antropogene druk te staan. Het is daarom ook niet te verwonderen dat deze ecosystemen sinds meerdere jaren een belangrijke prioriteit vormen voor het natuurbehoud. Binnen de wetlands vormen estuaria zeer produktieve systemen waarvan het rijke voedselaanbod wordt benut door grote aantallen steltlopers, die buiten het broedseizoen bijna volledig op dergelijke getijdengebieden zijn aangewezen. Het belang van het Deltagebied (NI.) en met name de getijdengebieden van Ooster- en Westerschelde voor watervogels worden kort... |
| Tipo: Info:eu-repo/semantics/doctoralThesis |
Palavras-chave: Benthos; Birds; Estuaries; River; Water. |
| Ano: 1993 |
URL: http://www.vliz.be/imisdocs/publications/5961.pdf |
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| Registros recuperados: 28 | |
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