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| Registros recuperados: 185 | |
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| Nelson, Gerald C; University of Illinois; gnelson@uiuc.edu; Bennett, Elena; McGill University;; Berhe, Asmeret A; University of California at Berkeley;; Cassman, Kenneth; University of Nebraska;; DeFries, Ruth; University of Maryland;; Dietz, Thomas; Michigan State University;; Dobermann, Achim; University of Nebraska;; Dobson, Andrew; Princeton University;; Janetos, Anthony; Joint Global Change Research Institute;; Levy, Marc; Columbia University;; Nakicenovic, Nebojsa; Vienna University of Technology;; O'Neill, Brian; International Institute for Applied Systems Analysis;; Norgaard, Richard; University of California at Berkeley;; Petschel-Held, Gerhard; ;; Ojima, Dennis; Colorado State University;; Pingali, Prabhu; FAO;; Watson, Robert; World Bank;; Zurek, Monika; FAO;. |
| This paper provides an overview of what the Millennium Ecosystem Assessment (MA) calls “indirect and direct drivers” of change in ecosystem services at a global level. The MA definition of a driver is any natural or human-induced factor that directly or indirectly causes a change in an ecosystem. A direct driver unequivocally influences ecosystem processes. An indirect driver operates more diffusely by altering one or more direct drivers. Global driving forces are categorized as demographic, economic, sociopolitical, cultural and religious, scientific and technological, and physical and biological. Drivers in all categories other than physical and biological are considered indirect. Important direct drivers include changes in climate,... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Ecosystem services; Drivers of change; Direct drivers; Indirect drivers; Demographic drivers; Economic drivers; Sociopolitical drivers; Cultural and religious drivers; Scientific and technological drivers; Physical and biological drivers; Climate change; Plant nutrient use; Land conversion; Diseases; Invasive species. |
| Ano: 2006 |
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| McClanahan, Tim; Wildlife Conservation Society; crcp@africaonline.co.ke; Polunin, Nicholas; Newcastle University; n.polunin@ncl.ac.uk; Done, Terry; Australian Institute of Marine Science; t.done@aims.gov.au. |
| We review the evidence for multiple ecological states and the factors that create ecological resilience in coral reef ecosystems. There are natural differences among benthic communities along gradients of water temperature, light, nutrients, and organic matter associated with upwelling-downwelling and onshore-offshore systems. Along gradients from oligotrophy to eutrophy, plant-animal symbioses tend to decrease, and the abundance of algae and heterotrophic suspension feeders and the ratio of organic to inorganic carbon production tend to increase. Human influences such as fishing, increased organic matter and nutrients, sediments, warm water, and transportation of xenobiotics and diseases are common causes of a large number of recently reported ecological... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Carbon production; Coral reefs; Diseases; Ecological stress; Fishing; Global climate change; Keystone species; Oligotrophy-eutrophy; Resilience; Trophic ecology. |
| Ano: 2002 |
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| BATISTA, M. de F.; GUEDES, A. L. C.. |
| Os plantios de pimentao, em Manaus, sofrem serios problemas fitopatologicos. A falta de informacoes sobre as alternativas de controle da doenca leva, geralmente, a serias perdas na producao ou, ate mesmo, a perdas totais, levando o produtor a desistir da cultura. Entao, enumerou-se, neste trabalho, as doencas em ordem de importancia e formas de controle, com objetivo de auxiliar o produtor na conducao do plantio de pimentao. |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Brasil; Amazonas; Diseases; Fungus.; Capsicum Annuum; Controle Químico; Doença; Fungo; Pimentão.; Chemical control.. |
| Ano: 1981 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667298 |
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| Registros recuperados: 185 | |
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