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| Warren,Steven D.; Aguilera,Lorgio E.; Scott Baggett,L.. |
| BACKGROUND: Many barrel or columnar cacti, including some in the Atacama Desert, produce their reproductive tissue at or near the terminal apices of solitary or minimally branched stems that lean toward the equator, reportedly to maximize exposure to photosynthetically active radiation (PAR). Those with lateral reproductive tissue, often produce the tissue on the equatorial side of the stems. An examination of the multi-stemmed, arbuscular cactus, Eulychnia breviflora, was made to determine if it follows the same general strategy. METHODS: Individuals of the species were evaluated along a 100 km transect in the Atacama Desert. The position of all floral buds and open flowers was documented relative to the center of the plants and relative to the center of... |
| Tipo: Journal article |
Palavras-chave: Eulychnia breviflora; Energetic efficiency; Equatorial orientation; Flowers; Photosynthetically active radiation (PAR). |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2016000100010 |
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| CURADO,LEONE F.A.; MUSIS,CARLO R. DE; CUNHA,CRISTIANO R. DA; RODRIGUES,THIAGO R.; PEREIRA,VINICIUS M.R.; NOGUEIRA,JOSÉ S.; SANCHES,LUCIANA. |
| ABSTRACT The study of radiation entrance and exit dynamics and energy consumption in a system is important for understanding the environmental processes that rule the biosphere-atmosphere interactions of all ecosystems. This study provides an analysis of the interaction of energy in the form of photosynthetically active radiation (PAR) in the Pantanal, a Brazilian wetland forest, by studying the variation of PAR reflectance and its interaction with local rainfall. The study site is located in Private Reserve of Natural Heritage, Mato Grosso State, Brazil, where the vegetation is a monodominant forest of Vochysia divergens Phol. The results showed a high correlation between the reflection of visible radiation and rainfall; however, the behavior was not the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pantanal; Photosynthetically active radiation (PAR); Cambarazal; Albedo. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401387 |
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