|
|
|
| Registros recuperados: 72 | |
|
|
| Rice, Jake; Rochet, Marie-joelle. |
| We develop a framework for the objective selection of a suite of indicators for use in fisheries management. The framework encompasses eight steps, and provides guidance on pitfalls to be avoided at each step. Step I identifies user groups and their needs, featuring the setting of operational objectives, and Step 2 identifies a corresponding list of candidate indicators. Step 3 assigns weights to nine screening criteria for the candidate indicators: concreteness, theoretical basis, public awareness, cost, measurement, historic data, sensitivity, responsiveness, and specificity. Step 4 scores the indicators against the criteria, and Step 5 summarizes the results. Steps 3-5 offer technical aspects on which guidance is provided, including scoring standards... |
| Tipo: Text |
Palavras-chave: Scoring; Objectives; Indicators; Guidelines; Framework; Ecosystem; Criteria. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-484.pdf |
| |
|
|
| Calvo,Jorge O.; Porfiri,Juan D.; González-Riga,Bernardo J.; Kellner,Alexander W.A.. |
| A unique site at the northern area of Patagonia (Neuquén, Argentina) reveals a terrestrial ecosystem preserved in a detail never reported before in a Late Cretaceous deposit. An extraordinary diversity and abundance of fossils was found concentrated in a 0.5 m horizon in the same quarry, including a new titanosaur sauropod, Futalognkosaurus dukei n.gen., n.sp, which is the most complete giant dinosaur known so far. Several plant leaves, showing a predominance of angiosperms over gymnosperms that likely constituted the diet of F. dukei were found too. Other dinosaurs (sauropods, theropods, ornithopods), crocodylomorphs, pterosaurs, and fishes were also discovered, allowing a partial reconstruction of this Gondwanan continental ecosystem. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dinosauria; Titanosauria; Ecosystem; Taphonomy; Upper Cretaceous; Gondwana; Patagonia; Argentina. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000300013 |
| |
|
|
| RESENDE, M.; SANTANA, D. P.; BAHIA FILHO, A. F. C.; SANS, L. M. A.. |
| Embora semelhante do ponto de vista macroclimatico, ecossistemas contiguos podem apresentar profundas diferencas no aspectos microclimatico, bem como na disponibilidade de agua e envolvendo componentes de clima, de solo e vegetacao, faz com que as analises para estratificacao ambiental reunam um numero relativamente grande de informações que nem sempre estao sistematizadas. Por outro lado, o caracter interativo das relacoes existentes torna o processo complexo, demandando uma abordagem estratificacao de ambientes em termos de radiacao, disponibilidade de agua e nutrientes e de alguns fatores coadjuvantes. Em virtude de a grande maioria dos criterios utilizados para estratificacao de ambientes serem de uso corrente nos estudos de mapeamentos de solos,... |
| Tipo: Artigo em anais de congresso (ALICE) |
Palavras-chave: Milho; Ecossistema; Zea mays; Maize; Ecosystem. |
| Ano: 1995 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/476000 |
| |
|
| |
|
|
| Singh, Omvir; Singh, Pratap; Sarangi, Arjamadutta; Sharma, M C; Kumar, Sanjeev. |
| Water erosion caused by accelerated anthropogenic activities has been perceived as the major source of sediment flow in Himalayan catchments. Keeping this in view, the sediment flux data measured at the outlet of the Sainj and the Tirthan watersheds in the Lesser Himalayan region was analysed. Rainfall behaviour coupled with existing forest cover, snow bound and glaciated areas with rocky outcrops in the Sainj watershed could result in more sediment yields as compared to the Tirthan. It was observed that the sediment flux from the Sainj watershed was 1.5 times more than the Tirthan watershed. Also, the sediment transport from both watersheds showed an increasing trend in the monthly, seasonal and annual flux during the study period (1981–2004). This... |
| Tipo: Article |
Palavras-chave: Hydrology; Ecosystem. |
| Ano: 2010 |
URL: http://eprints.iari.res.in/239/1/Current_Science.pdf |
| |
|
|
| Singh, Omvir; Singh, P; Sarangi, A; Sharma, M.C.; Kumar, Sanjeev. |
| Water erosion caused by accelerated anthropogenic activities has been perceived as the major source of sediment flow in Himalayan catchments. Keeping this in view, the sediment flux data measured at the outlet of the Sainj and the Tirthan watersheds in the Lesser Himalayan region was analysed. Rainfall behaviour coupled with existing forest cover, snow bound and glaciated areas with rocky outcrops in the Sainj watershed could result in more sediment yields as compared to the Tirthan. It was observed that the sediment flux from the Sainj watershed was 1.5 times more than the Tirthan watershed. Also, the sediment transport from both watersheds showed an increasing trend in the monthly, seasonal and annual flux during the study period (1981–2004). This... |
| Tipo: Article |
Palavras-chave: Hydrology; Ecosystem; Environmental Sciences. |
| Ano: 2010 |
URL: http://eprints.iari.res.in/256/1/Current_Science.pdf |
| |
|
| |
|
| |
|
|
| Goulletquer, Philippe. |
| On estime à l'heure actuelle que la consommation de poisson par habitant devrait doubler d'ici à 2030, comme elle l'a fait entre 1973 et 2003. Que devons-nous faire pour mieux préserver (voire accroître) les réserves de poisson, qui sont en diminution constante ? Qu'en est-il de l'aquaculture ? Peut-elle répondre à cette demande croissante, et si oui quel en sera l'impact environnemental ? Comment les pays pauvres peuvent-ils en particulier exiger des sociétés qui la pratiquent de prendre en charge les frais supplémentaires liés à une production d'aquaculture durable ? |
| Tipo: Text |
Palavras-chave: Biodiversiy; Ecosystem; Aquaculture; Fisheries. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/acte-6210.pdf |
| |
|
| |
|
|
| Henley, Sian F.; Cavan, Emma L.; Fawcett, Sarah E.; Kerr, Rodrigo; Monteiro, Thiago; Sherrell, Robert M.; Bowie, Andrew R.; Boyd, Philip W.; Barnes, David K. A.; Schloss, Irene R.; Marshall, Tanya; Flynn, Raquel; Smith, Shantelle. |
| The Southern Ocean plays a critical role in regulating global climate as a major sink for atmospheric carbon dioxide (CO2), and in global ocean biogeochemistry by supplying nutrients to the global thermocline, thereby influencing global primary production and carbon export. Biogeochemical processes within the Southern Ocean regulate regional primary production and biological carbon uptake, primarily through iron supply, and support ecosystem functioning over a range of spatial and temporal scales. Here, we assimilate existing knowledge and present new data to examine the biogeochemical cycles of iron, carbon and major nutrients, their key drivers and their responses to, and roles in, contemporary climate and environmental change. Projected increases in... |
| Tipo: Text |
Palavras-chave: Southern Ocean; Biogeochemistry; Primary production; Iron; Nutrients; Carbon; Ecosystem; Ocean acidification. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00676/78831/81113.pdf |
| |
|
|
| Food and Agriculture Organization of the United Nations (FAO),World Conservation Monitoring Centre (WCMC),Center for International Earth Science Information Network (CIESIN),World Resources Institute,International Food Policy Research Institute,Global Maritime Boundaries Database (GMBD),The International Society for Mangrove Ecosystems (ISME), |
| Tipo: Journal Contribution |
Palavras-chave: Country profile; Angola; Ecosystem; Ecosystems. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/570 |
| |
|
| |
|
|
| Wallace, Rodrick; ; wallace@pi.cpmc.columbia.edu. |
| Ecosystem resilience theory permits novel exploration of developmental psychiatric and chronic physical disorders. Structured psychosocial stress, and similar noxious exposures, can write distorted images of themselves onto child growth, and, if sufficiently powerful, adult development as well, initiating a punctuated life course trajectory to characteristic forms of comorbid mind/body dysfunction. For an individual, within the linked network of broadly cognitive psysiological and mental subsystems, this occurs in a manner almost exactly similar to resilience domain shifts affecting a stressed ecosystem, suggesting that reversal or palliation may often be exceedingly difficult. Thus resilience theory may contribute significant new perspectives to the... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Chronic disease; Cognition; Comorbidity; Developmental disorder; Ecosystem; Resilience. |
| Ano: 2008 |
|
| |
|
|
| FALESI, I. C.. |
| A pesquisa foi realizada em áreas com pastos de idades diferentes, desde meses de idade (formação) ate 11 anos, tomando-se a área com floresta natural como elemento de comparação (testemunha). Foram coletadas amostras de solos de 0-20 cm em cada uma dessas áreas, alem da coleta de perfis pedagógicos ate a uma profundidade de 1,50 m. Apos a obtenção das analises no laboratório, constatou-se que vários nutrientes e índices ou valores, sofreram acréscimos quando o solo foi cultivado com pastagem, melhorando portanto, as suas propriedades químicas. Os elementos que mais se evidenciaram, foram: cálcio, magnésio, fosforo, alumínio, e os índices de pH, V (saturação de bases), S (soma de bases) e saturação de alumínio. Os quadros de analises e gráficos constantes... |
| Tipo: Séries anteriores (INFOTECA-E) |
Palavras-chave: Brasil; Sown pasture; Ecosystem; Fertility.; Clima; Ecologia; Ecossistema; Fertilidade; Geologia; Pastagem Cultivada; Topografia; Solo; Vegetação.; Amazonia; Ecology; Geology; Climate; Topography; Soil; Vegetation.. |
| Ano: 1976 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/385693 |
| |
|
| |
|
| |
|
|
| Fromentin, Jean-marc; Fonteneau, Alain; Restrepo, Victor. |
| During the last SCRS plenary meeting, the sub-committee on environment suggested to present a document on the ‘Ecosystem Approach to Fisheries’ (EAF). This document firstly recalls the general scientific and institutional background of EAF, then we propose a synoptic view of EAF, including four main domains: governance, exploitation, resources and impacts on ecosystems. The way that EAF is tackled within the various tuna commissions is then summarised. Finally, we rapidly examine the way the SCRS could cope with EAF issues and we suggest to merge the sub-committee on environment with this on by-catch into a single subcommittee on ecosystem. |
| Tipo: Text |
Palavras-chave: Ecosystem; Resources; Exploitation; Governance; Environment; By-catch. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/00192/30334/28809.pdf |
| |
|
|
| Richardson, Robert B.. |
| Food security in developing countries depends in part on the sustainable use of natural resources. Food security is usually examined through three dimensions, namely the availability, access, and utilization of food. Ecosystems directly and indirectly support each of these dimensions through the provision of critical ecosystem services that facilitate agricultural production, create income- generating opportunities, and provide energy for cooking. However, in some cases, household uses of natural resources undermine particular elements of food security, hindering national poverty reduction strategies and threatening the sustainability of critical ecosystem functions. I examine the role of ecosystem services in rural food security through the lens of its... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental sustainability; Ecosystem; Food security; Environmental Economics and Policy; Food Security and Poverty. |
| Ano: 2011 |
URL: http://purl.umn.edu/98782 |
| |
|
| |
| Registros recuperados: 72 | |
|
|
|
