Root and shoot biomasses in the tropical dry forest of semi-arid Northeast Brazil
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Root and shoot biomasses and their ratio (R:S) were determined for three stages of forest regeneration (18, 40 and > 60 years.), and for open and dense vegetation, in four soil classes in the semi-arid region of Northeast Brazil.
Shoot biomasses were estimated by allometry and roots were collected in 0.7 × 0.7 × 1 m trenches.
Root and shoot biomasses and the R:S ratio were over double in the >60 year-old vegetation (R:S = 0.67) when compared to more recent regenerated areas (0.32). In dense vegetation the biomass of roots and shoots were also more than the double of those in open vegetation but the R:S ratios were not significantly different (0.51 and 0.49). Litholic Neosols had lower ratio (0.22) than the other soil classes (0.53 to 0.63) and dense and open vegetation did not differ. In all areas except in deep sandy Quartzarenic Neosols most of the roots (> 90 %) were in the upper 40-cm layer of the soil profile, and consisted of coarse roots.
Root biomass accumulates more slowly than aboveground biomass and it takes several decades to stabilize in shallower soils. The R:S ratios are higher when compared to other dry land forests, probably due to low water availability.
Keywordscaatinga Root-shoot ratio Successional stages
The authors are grateful to Conselho Nacional de Pesquisa e Desenvolvimento (CNPq) for the master scholarship of the first author and research fellowship of the second and eighth authors. They are also grateful to CNPq and to Fundação de Ciência e Tecnologia de Pernambuco (FACEPE) for the financial and logistical support, mainly through the Project “Impactos de Mudanças Climáticas Sobre a Cobertura e Uso da Terra em Pernambuco: Geração e Disponibilização de Informações para o Subsídio a Políticas Públicas (Processo APQ-0077-5.01/09, edital 05-2010)”. The authors are also grateful to Dr. Vanderlise Giongo, of EMBRAPA Semiárido for the access to part of her unpublished data.
- Brown S (1997) Estimating biomass and biomass change of tropical forests: a primer. Rome: FAO, Forestry Paper 134. http://www.fao.org/docrep/w4095e/w4095e00.htm. Accessed 06 March 2012
- Empresa Brasileira de Pesquisa Agropecuária, (EMBRAPA) (2001) Zoneamento Agroecológico do Estado de Pernambuco. ZAPE Digital, Recife/PE: Embrapa solos/35Google Scholar
- Higuchi N, Santos J, Ribeiro RJ, Minette L, Biot Y (1998) Biomassa da parte aérea da vegetação da floresta tropical úmida de terra-firme da Amazônia brasileira. Acta Amazon 28:153–166Google Scholar
- Jacomine PT, Cavalcanti AC, Burgos N, Pessoa SCP, Silveira CO (1973) Levantamento exploratório-reconhecimento de solos do Estado de Pernambuco. Ministério da Agricultura/SUDENE, RecifeGoogle Scholar
- Jaramillo VJ, Martínez-Yrízar A, Sanford-Jr RL (2011) Primary productivity and biogeochemistry of seasonally dry tropical forests. In: Dirzo R, Young HS, Mooney HA, Ceballos G (eds) Seasonally dry tropical forests: ecology and conservation, Island Press, Washington, pp 109–128Google Scholar
- Jensen JR (2009) Elementos de interpretação visual de imagens. In: Jensen JR (ed) Sensoriamento remoto do ambiente: uma perspectiva em recursos terrestres, Parêntese, pp 129–150Google Scholar
- Martínez-Yrízar A (1995) Biomass distribution and primary productivity of tropical dry forests. In: Bullock SH, Mooney HA, Medina E (eds) Seasonally dry tropical forests, Cambridge University, Cambridge, pp 326–345Google Scholar
- Pande PK (2005) Biomass and productivity in some disturbed tropical dry deciduous teak forests of Satpura plateau, Madhya Pradesh. Trop Ecol 46:229–239Google Scholar
- Pereira IM, Andrade LA, Sampaio EVSB, Barbosa MRV (2003) Use-history effects on structure and flora of Caatinga. Biotropica 35:154–165Google Scholar
- Riegelhaupt EM, Pareyn FGC, Gariglio MA (2010) O manejo florestal como ferramenta para o uso sustentável e conservação da caatinga. In: Gariglio MA, Sampaio EVSB, Cestaro LA, Kageyama PY (eds) Uso sustentável e conservação dos recursos florestais da caatinga. Serviço florestal brasileiro, Brasília, pp 349–367Google Scholar
- Salcedo IH, Leite L, Vasconcelos E, Souza F, Sampaio EVSB (1999) Produção de raízes finas sob vegetação de caatinga. Workshop sobre sistema radicular: metodologias e estudos de casos. EMBRAPA 1:139–152Google Scholar
- Sampaio EVSB (1995) Overview of the Brazilian Caatinga. In: Stephen HB, Mooney HA, Medina E (eds) Seasonally dry tropical forests, Cambridge University, pp 35–63Google Scholar
- Sarmiento G, Pinillos M, Garay I (2005) Biomass variability in tropical American lowland rainforests. Ecotropicos 18:1–20Google Scholar
- Vanninen P, Ylitalo H, Sievänen R, Mäkelä A (1996) Effects of age and site quality on the distribution of biomass in Scots pine (Pinus sylvestris L.). Trees 10:231–238Google Scholar
- Vargas R, Allen MF, Allen EB (2008) Biomass and carbon accumulation in a fire chronosequence of a seasonally dry tropical forest. Glob Chang Biol 14:109–124Google Scholar