Fitomassa epigéa da mata ciliar do rio Mogi-Guaçu, Itapira - SP

Abstract

-(Above ground plant biomass of the gallery forest at the Mogi-Guaçu river, Itapira -SP). The objective of this study is to determine the above ground plant biomass of the Mogi-Guaçu river gallery forest and to identity the best equation to predict the above ground tree biomass. This study was carried out in a remaining fragment of mesophyllous forest, located in Itapira, São Paulo (22º21'S and 46º51'W). Twelve plots of 25 m 2 were established to determine the above ground plant biomass by destructive method. Trees were identified and cut down at ground level. Each tree had its height and basal perimeter registered. Leaves and woody material were manually separated and the fresh weight for these two fractions was determined. Herbs and shrubs lower than 1.3 m height in a 3 m 2 of each plot were cut down at ground level and fresh weight of the woody and non-woody fractions was also determined. The same procedure was used to evaluate the biomass of lianas. Samples of each fraction were dried at 80ºC to constant weight the determine the dry weight. The total phytomass estimated for the forest was 133.3 t/ha. The tree layer accounted for 88.5%, and lianas and herbs for 11,3% and 0.2%, respectively. The best equation to predict tree biomass in similar forests is: Total tree biomass = [ 0.523 + 0.053 perimeter] 3. RESUMO -(Fitomassa epigéa da mata ciliar do rio Mogi-Guaçu, Itapira -SP). Este trabalho teve como objetivos estimar a fitomassa epigéa da mata ciliar do rio Mogi-Guaçu e determinar a melhor equação preditiva da fitomassa arbórea. O trabalho foi realizado num fragmento de mata localizado no município de Itapira -SP (22°21'S e 46°51'W). Foram delimitadas 12 parcelas de 25 m 2 , para determinação da fitomassa através do método destrutivo. Os indivíduos arbóreos foram identificados e cortados ao nível do solo. De cada árvore, foram tomadas medidas de perímetro basal e altura. As folhas foram separadas manualmente dos ramos para determinação do peso fresco da porção foliar e lenhosa. A vegetação herbácea-arbustiva, de porte inferior a 1,3 m, existente em 3 m 2 de cada parcela, foi cortada ao nível do solo e tomadas as medidas de peso fresco da porção lenhosa e não lenhosa. O mesmo procedimento foi adotado para as lianas. Amostras de cada fração foram secas em estufa a 80°C, até peso constante, para determinação do peso seco. A fitomassa média obtida foi de 133,3 t.ha -1 , sendo 88,5% referentes ao estrato arbóreo, 11,3% às lianas e 0,2% ao estrato herbáceo. A equação que melhor estima a fitomassa arbórea total de mata com características e condições semelhantes às da mata ciliar estudada foi definida como: Massa seca total = [ 0,523 + 0,053 perímetro] 3 .

Allometric models for estimating the phytomass of a secondary Atlantic Forest area of southeastern Brazil

“…Various types of regression models and different combinations of variables have been used in the development of predictive models of phytomass for tropical ecosystems (Folster et al 1976, Golley et al 1978, Saldarriaga et al 1988, Brown et al 1989, Overman et al 1994, Moreira-Burger & Delitti 1999, Chave et al 2001, Chave et al 2005, Delitti et al 2006. These models have been applied to quantify nutrient stores, accumulated organic material and potential carbon reserves, to determine vegetation growth rate after perturbation, and to identify determinants of variation in biomass.…”

Modelos preditores da fitomassa aérea da Floresta Baixa de Restinga

“…Altura e diâmetro são informações facilmente obtidas em campo. Todas as variáveis têm sido amplamente utilizadas em modelos preditores de biomassa de vegetação arbórea de ecossistemas tropicais (Folster et al 1976, Jordan & Uhl 1978, Golley et al 1978, Tanner 1980, Saldarriaga et al 1988, Brown et al 1989, Martinez-Yrizar et al 1992, Scatena et al 1993, Overman et al 1994, Santos 1996, Moreira-Burger & Delitti 1999, Chave et al 2001, Chave et al 2005, Delitti et al 2006.…”

“…No Brasil os modelos preditores de fitomassa florestal, a partir de métodos destrutivos, concentraramse nas Florestas Amazônicas (Klinge et al 1975, Uhl & Jordan 1984, McWillian et al 1993, Kauffman et al 1994, Santos 1996, Higuchi et al 1998, Nelson et al 1999, Nogueira et al 2007, Nogueira et al 2008. Em menor número, encontram-se os modelos desenvolvidos para outros ecossistemas, tais como: Cerrados (Delitti & Meguro 1984, Castro & Kauffman 1998, Abdala et al 1998, Delitti et al 2006, Caatinga (Sampaio & Silva 2005), Mata Mesófila Semidecídua Ciliar (Moreira- Burger & Delitti 1999), Manguezal (Soares & Novelli 2005) e Mata Atlântica (Burger & Delitti, 2008).…”

Role of Terrestrial Bromeliads in Nutrient Cycling, Restinga da Marambaia, Brazil

“…In the Atlantic Forest biome, the direct method for estimating biomass was employed in the State of São Paulo at Semidecidual Riparian Forest (Moreira- Burger & Delitti, 1999), Rain Forest (Burger & Delitti, 2008) and Restinga Forest (Moreira- Burger & Delitti, 2010); in the State of Rio de Janeiro for Clusia hilariana Schltdl. at Restinga de Jurubatiba National Park (Dias et al, 2006) and in the State of Paraná at Submontane, Lowland and Foodplain Forests (Tiepolo et al, 2002).…”

“…Canopy trees are the most important components for biomass estimates in tropical forest ecosystems, since they receive the highest levels of solar radiation and therefore reflect in large biomass increment (Moreira- Burger & Delitti, 1999). However, these same authors verified that other forms of plant may be also important when it comes to plant communities characterized by an open canopy and a dense plant layer colonizing the forest floor.…”