Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados RChHN (2) Gayana Botánica (1) Autor Squeo,Francisco A (3) Carvajal,Danny E (2) Loayza,Andrea P (2) Arancio,Gina (1) Erazo,Manuela B (1) Estevez,Rodrigo A (1) Gachon,Paloma R (1) García-Guzmán,Patricio (1) López,Ramiro P (1) Toro,Pablo J (1) Mais... Palavra-chave Adesmia (1) Amenaza a la biodiversidad (1) Atacama Desert (1) Balsamocarpon (1) Drought (1) Fabiana (1) Facilitation (1) Myrcianthes coquimbensis (1) Partial seed predation (1) Recalcitrant seed (1) Seedling establishment (1) Tolerance (1) Zonas áridas (1) Mais... Tipo do documento Journal article (3) Ano 2015 (1) 2014 (1) 2010 (1) País Chile (3) Idioma Inglês (2) Espanhol (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Producción de carbón vegetal a partir de arbustos nativos en la Región de Atacama, Chile Gayana Botánica Estevez,Rodrigo A; Squeo,Francisco A; Arancio,Gina; Erazo,Manuela B. La producción de carbón vegetal a partir de arbustos leñosos es una de las principales amenazas para la vegetación nativa en zonas áridas. En este trabajo se estima la producción de carbón en la provincia de Huasco, al sur de la Región de Atacama, y se identifican las principales especies utilizadas en este proceso. Se detectaron 21 puntos de venta de carbón nativo en el área de estudio. En cada uno de ellos se recolectaron muestras del carbón comercializado, las que fueron posteriormente comparadas con muestras de referencia. Se realizaron 28 entrevistas a vendedores, productores de carbón nativo e informantes claves, para estimar el volumen de producción anual. Se identificaron 4 sitios productivos en la zona de estudio, tres de ellos entre Vallenar y El... Tipo: Journal article Palavras-chave: Adesmia; Balsamocarpon; Fabiana; Amenaza a la biodiversidad; Zonas áridas. Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432010000200007 Germination, seedling performance, and root production after simulated partial seed predation of a threatened Atacama Desert shrub RChHN Loayza,Andrea P; Gachon,Paloma R; García-Guzmán,Patricio; Carvajal,Danny E; Squeo,Francisco A. BACKGROUND: Seed loss to predators is a common phenomenon across plant communities and an important determinant of plant recruitment. Although seed predators commonly destroy the entire seed, partial seed consumption has been reported for many species; however, the degree to which seed mass loss affects germination dynamics and survival of new individuals has been poorly documented. We simulated seed damage in natural conditions to examine how different levels of cotyledonary reserve removal affect germination dynamics and seedling performance of Myrcianthes coquimbensis (Myrtaceae), a threatened Atacama Desert shrub. The experiment combined two levels of seed maturity with three levels of seed mass loss. RESULTS: Removal of the cotyledon reserves and seed... Tipo: Journal article Palavras-chave: Myrcianthes coquimbensis; Partial seed predation; Recalcitrant seed; Tolerance. Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100010 Growth and early seedling survival of four Atacama Desert shrub species under experimental light and water availability regimes RChHN Carvajal,Danny E; Loayza,Andrea P; López,Ramiro P; Toro,Pablo J; Squeo,Francisco A. BACKGROUND: In arid environments, where light and water supply are patchy in space and time, differences in how seedlings tolerate drought and shade conditions will determine the ability of a species to establish. Understanding seedling responses to the interactive effects of water and shade is critical to predict the future impact of increasing drought frequencies on plant communities across many arid ecosystems of the world. In this study, we used an experimental field approach to assess how different light (15%, 75%, and 95%) and water (natural rainfall (NR), NR +50 mm, NR +100 mm) levels affect seedling survival and growth of four Atacama Desert shrub species (Calliandra chilensis, Encella canescens, Proustia cuneifolia, and Senna cumingii). We... Tipo: Journal article Palavras-chave: Seedling establishment; Facilitation; Drought; Atacama Desert. Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100025 Registros recuperados: 3 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco