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| Cosenza,Diogo Nepomuceno; Soares,Vicente Paulo; Leite,Helio Garcia; Gleriani,José Marinaldo; Amaral,Cibele Hummel do; Gripp Júnior,Joel; Silva,Antonilmar Araújo Lopes da; Soares,Paula; Tomé,Margarida. |
| Abstract: The objective of this work was to evaluate the application of airborne laser scanning (ALS) to a large-scale eucalyptus stand inventory by the method of individual trees, as well as to propose a new method to estimate tree diameter as a function of the height obtained from point clouds. The study was carried out in a forest area of 1,681 ha, consisting of eight eucalyptus stands with ages varying from four to seven years. After scanning, tree heights were obtained using the local maxima algorithm, and total wood stock by summing up individual volumes. To determine tree diameters, regressions fit using data measured in the inventory plots were used. The results were compared with the estimates obtained from field sampling. The equation system... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest measurement; Laser scanners; LiDAR. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201373 |
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| Silva,Celice Alexandre; Vieira,Milena Faria; Amaral,Cibele Hummel do. |
| Os atributos florais, a ornitofilia e o sucesso reprodutivo de Palicourea longepedunculata Gardner foram estudados em fragmento de Floresta Atlântica do sudeste do Brasil. Essa espécie é um arbusto distílico que ocorre em sub-bosque úmido de florestas. Em uma área de sete hectares, os indivíduos dos morfos brevistilo e longistilo foram encontrados em uma taxa muito próxima da esperada, 1:1. O período de floração estendeu-se de março (final da estação chuvosa) a setembro, com um pico em maio/junho (estação seca). Os atributos florais dos morfos foram similares, isto é, a floração dos morfos florais foi sincronizada e os números de inflorescências por planta, de flores por inflorescência, de flores abertas por inflorescência e por planta dos morfos foram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beija-flores; Fenologia de floração; Floresta Atlântica; Palicourea; Phaethornis. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000200002 |
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| Venancio,Luan Peroni; Mantovani,Everardo Chartuni; Amaral,Cibele Hummel do; Neale,Christopher Michael Usher; Filgueiras,Roberto; Gonçalves,Ivo Zution; Cunha,Fernando França da. |
| ABSTRACT SAFER (Simple Algorithm for Evapotranspiration Retrieving) is a relatively new algorithm applied successfully to estimate actual crop evapotranspiration (ET) at different spatial scales of different crops in Brazil. However, its use for monitoring irrigated crops is scarce and needs further investigation. This study assessed the performance of SAFER to estimate ET of irrigated corn in a Brazilian semiarid region. The study was conducted in São Desidério, Bahia State, Brazil, in corn-cropped areas in no-tillage systems and irrigated by central pivots. SAFER algorithm with original regression coefficients (a = 1.8 and b = –0.008) was initially tested during the growing seasons of 2014, 2015, and 2016. SAFER performed very poorly for estimating corn... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Landsat; Water consumption; Maize; Remote sensing. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000400102 |
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