Biomass and mineralmass estimates in a 'cerrado' ecosystem
| Autor: | Marico Meguro, Welington Braz Carvalho Delitti, Juli G. Pausas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Brazilian Journal of Botany v.29 n.4 2006 Brazilian Journal of Botany Sociedade Botânica de São Paulo (SBSP) instacron:SBSP |
| Popis: | This work aimed to develop allometric equations for tree biomass estimation, and to determine the site biomass in different "cerrado" ecosystems. Destructive sampling in a "campo cerrado" (open savanna) was carried out at the Biological Reserve of Moji-Guacu, State of Sao Paulo, southeastern Brazil. This "campo cerrado" (open savanna) grows under a tropical climate and on acid, low nutrient soils. Sixty wood plants were cut to ground level and measurements of diameter, height and weight of leaves and stems were taken. We selected the best equations among the most commonly used mathematical relations according to R2 values, significance, and standard error. Both diameter (D) and height (H) showed good relationship with plant biomass, but the use of these two parameters together (DH and D2H) provided the best predictor variables. The best equations were linear, but power and exponential equations also showed high R2 and significance. The applicability of these equations is discussed and biomass estimates are compared with other types of tropical savannas. Mineralmass was also estimated. "Cerrados" proved to have very important carbon reservoirs due to their great extent. In addition, high land-use change that takes place nowadays in the "cerrado" biome may significantly affect the global carbon cycle. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|