Canopy openness and lai estimates in two seasonally deciduous forests on limestone outcrops in central brazil using hemispherical photographs
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| Format: | Artículo científico |
| Langue: | en |
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Universidade Federal de Viçosa
2007
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| _version_ | 1876427025277779968 |
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| author | André Rosalvo Terra Nascimento |
| author_facet | André Rosalvo Terra Nascimento |
| contents | Canopy openness and lai estimates in two seasonally deciduous forests on limestone outcrops in central brazil using hemispherical photographs André Rosalvo Terra Nascimento Jeanine Maria Felfili Fagg Christopher William Fagg Agrociencias Cerrado Canopy opening hemispherical photographs Patches of seasonally dry tropical forests occur on limestone outcrops in Central Brazil surroundedby the dominant savanna vegetation. They contain valuable timber species but are threatened by farmingand mining activities. The objective of this study was to describe canopy opening and light relations in twoseasonally deciduous dry forests on slopes and limestone outcrops, in the Paranã valley at the northeasternregion of the Goiás state, Brazil. The studied forests were in the Fazenda Sabonete in Iaciara-Go and FazendaForquilha in Guarani-GO. Woody plants were sampled in 25 (20 x 20 m) plots in each forest. In the Saboneteforest 40 species, 705 ind./ha-1 with a basal area of 15.78 m²/ha-1 were found, while in Forquilha there were55 species, 956 ind./ha-1 with a basal area of 24.76 m²/ha-1. Using hemispherical photographic techniques,25 black and white photographs were taken at each site, during the dry season, totaling 50 photographs.These were taken at the beginning of each vegetation-sampling plot. The photographs were scanned in greytones and saved as ‘Bitmap‘. The canopy opening and leaf area index (LAI) were calculated using the softwareWinphot. The mean canopy opening was 54.0% (±9.36) for Fazenda Sabonete and 64.6% (±11.8) in FazendaForquilha, with both sites presenting significant differences in the opening estimates (P < 0.05). Their floristicrichness and structure also differed with the more open canopy forest, Forquilha, being richer and denser,suggesting the need for further studies on species-environment relationships in these forests. 2007 artículo científico 0100-6762 https://www.redalyc.org/articulo.oa?id=48831119 en http://www.redalyc.org/revista.oa?id=488 Revista Árvore application/pdf Universidade Federal de Viçosa Revista Árvore (Brasil) Num.1 Vol.31 |
| format | Artículo científico |
| id | redalyc_48831119 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Universidade Federal de Viçosa |
| spellingShingle | Canopy openness and lai estimates in two seasonally deciduous forests on limestone outcrops in central brazil using hemispherical photographs André Rosalvo Terra Nascimento Agrociencias Cerrado Canopy opening hemispherical photographs Canopy openness and lai estimates in two seasonally deciduous forests on limestone outcrops in central brazil using hemispherical photographs André Rosalvo Terra Nascimento Jeanine Maria Felfili Fagg Christopher William Fagg Agrociencias Cerrado Canopy opening hemispherical photographs Patches of seasonally dry tropical forests occur on limestone outcrops in Central Brazil surroundedby the dominant savanna vegetation. They contain valuable timber species but are threatened by farmingand mining activities. The objective of this study was to describe canopy opening and light relations in twoseasonally deciduous dry forests on slopes and limestone outcrops, in the Paranã valley at the northeasternregion of the Goiás state, Brazil. The studied forests were in the Fazenda Sabonete in Iaciara-Go and FazendaForquilha in Guarani-GO. Woody plants were sampled in 25 (20 x 20 m) plots in each forest. In the Saboneteforest 40 species, 705 ind./ha-1 with a basal area of 15.78 m²/ha-1 were found, while in Forquilha there were55 species, 956 ind./ha-1 with a basal area of 24.76 m²/ha-1. Using hemispherical photographic techniques,25 black and white photographs were taken at each site, during the dry season, totaling 50 photographs.These were taken at the beginning of each vegetation-sampling plot. The photographs were scanned in greytones and saved as ‘Bitmap‘. The canopy opening and leaf area index (LAI) were calculated using the softwareWinphot. The mean canopy opening was 54.0% (±9.36) for Fazenda Sabonete and 64.6% (±11.8) in FazendaForquilha, with both sites presenting significant differences in the opening estimates (P < 0.05). Their floristicrichness and structure also differed with the more open canopy forest, Forquilha, being richer and denser,suggesting the need for further studies on species-environment relationships in these forests. 2007 artículo científico 0100-6762 https://www.redalyc.org/articulo.oa?id=48831119 en http://www.redalyc.org/revista.oa?id=488 Revista Árvore application/pdf Universidade Federal de Viçosa Revista Árvore (Brasil) Num.1 Vol.31 |
| title | Canopy openness and lai estimates in two seasonally deciduous forests on limestone outcrops in central brazil using hemispherical photographs |
| topic | Agrociencias Cerrado Canopy opening hemispherical photographs |
| url | https://www.redalyc.org/articulo.oa?id=48831119 |