Variations in canopy gaps in different phytophysiognomies under fire effect
DOI:
https://doi.org/10.5902/1980509822856Keywords:
Luminosity, Ecological disturbances, Hemispheric photo, VegetationAbstract
Atlantic and Brazilian savanna phytogeographic domains stand out the high level of threating from forest remnants, making the ecological study of these important areas for both the Domains conservation. In nature, disturbances events are common, but human activities can aggravate the occurrence of these phenomena, for example, increasing the frequency of fire events in natural environments. Even the higher layer in the forest, the canopy, suffers directly and indirectly affected by this disturbance. Besides, canopies characteristics are decisive factor acting in the regeneration dynamics of vegetal community, regulating luminosity that reach inferior low layers of vegetation. This study aims to capture the variations in canopy gaps in an ecotone area between Savanna and Atlantic Domains in order to identify how these changes occur between the analyzed vegetation types and which is the fire influence in the upper layer of the forest. We captured variations in the forest gaps after a fire event utilizing hemispheric photos. The photos have been taking for three years in an interval of six months. We found out that similar phytophysiognomies showed similar levels of canopy coverage and displayed an oscillation pattern. Finally, it appears that fire proved to be an indirect modifier of the canopy, since the characteristics of the vegetation itself have the ability to control the impacts of this type of disturbance.
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ABRAMOFF, M. D.; MAGALHÃES, P. J.; RAM, S. J. Image processing with Image J. Biophotonics International, Pittsfield, v. 11, p. 36-42, 2004.
ALVARES, A. C. et al. Köppen’s climate classification map for Brazil. Meteorologische Zeitschrift, Stuttgart, v. 22, n. 6, p. 711-728, 2013.
BIANCHINI, E.; PIMENTA, J. A.; SANTOS, F. A. M. Spatial and temporal variation in the canopy cover in a Tropical Semi-deciduous Forest. Brazilian Archives of Biology and Technology, Curitiba, v. 44, n. 3, p. 269-276, 2001.
BOND, W. J. What limits trees in C4 Grasslands and Savannas? Annual Review of Ecology, Evolution, and Systematics, Palo Alto, v. 39, n. 1, p. 641-659, 2008.
BOWMAN, D. M. J. S. et al. Fire in the Earth System. Science, Washington, v. 324, n. 5926, p. 481-484, 2009.
BRASIL. Ministério da Agricultura e Reforma Agrária. Secretaria Nacional de Irrigação. Departamento Nacional de Meteorologia. Normais Climatológicas: 1961-1990. Brasília, 1992. 84 p.
BRASIL. Ministério do Meio Ambiente. Florestas do Brasil em resumo: dados de 2007-2012. Brasília: Serviço Florestal Brasileiro, 2013. 188 p.
COCHRANE, M. A. et al. Positive feedbacks in the fire dynamics of closed canopy Tropical Forests. Science, Washington, v. 284, p. 1832-1835, 1999.
COCHRANE, M. A. Fire Science for Rainforests. Nature, Londres, v. 421, n. 6926, p. 913-919, 2003.
COCHRANE, M. A.; SCHULZE, M. D. Fire as a recurrent event in tropical forests of the eastern Amazon: effects on forest structure, biomass, and species composition. Biotropica, Kansas, v. 31, n. 1, p. 2-16. 1999.
COUTINHO, L. M. Fire in the Ecology of Brazilian Cerrado. In: GOLDAMMER, J. G. Fire in the tropical biota: Ecological processes and global challenges. 1. ed. Berlim: Springer-Verlag, 1990. 497 p.
FENNER, M. The phenology of growth and reproduction in plants. Perpectives in Plant Ecology Evolution and Systematic, Massachusettes, v. 1, n. 1, p. 78-91, 1998.
FIDELIS, A. Fire in subtropical grasslands in Southern Brazil: effects on plant strategies and vegetation dynamics. 2008. Thesis (Doctorate in Science) – Technische Universität München, Munique, 2008.
FRAZER, G. W.; CANHAM, C. D.; LERTZMAN, K. P. Gap Light Analyzer (GLA), Version 2.0: Imaging software to extract canopy structure and gap light transmission indices from true-colour fisheye photographs, user’s manual and program documentation. Burnaby: Simon Fraser University and Milbrook, Institute of Ecosystem Studies. 1999. 36 p.
GALINDO-LEAL, C.; CÂMARA, I. G. Mata Atlântica: biodiversidade, ameaças e perspectivas. São Paulo: Fundação SOS Mata Atlântica; Belo Horizonte: Conservação Internacional, 2005. 472 p.
GANDOLFI, S.; JOLY, C. A.; LEITÃO-FILHO, H. F. “Gaps of deciduousness”: cyclical gaps in tropical forests. Scientia Agricola, Piracicaba, v. 66, n. 2, p. 280-284, 2009.
GANDOLFI, S.; JOLY, C. A.; RODRIGUES, R. R. Permiability - Impermeability: canopy trees as biodiversity filters. Scientia Agricola, Piracicaba, v. 64, n. 4, p. 433-438, 2007.
HAINES, B.; FOSTER, R. B. Energy flow through litter in a Panamanian forest. Journal of Ecology, Oxford, v. 65, p. 147-155, 1977.
HENNENBERG, K. J. et al. Phytomass and fire occurrence along forest savanna transects in the Comoé National Park, Ivory Coast. Journal of Tropical Ecology, Cambridge, v. 22, n. 3, p. 303-311, 2006.
HOFFMANN, W. A. et al. Fuels or microclimate? Understanding the drivers of fire feedbacks at savanna-forest boundaries. Austral Ecology, Canberra, v. 37, n. 6, p. 634-643, 2012.
JOLY, C. A.; METZGER, J. P.; TABARELLI, M. Experiences from the Brazilian Atlantic Forest: ecological findings and conservation initiatives. New Phytologist, Lancaster, v. 204, n. 3, p. 459-473, 2014.
JUDD, W. S. et al. Sistemática Vegetal: um enfoque filogenético. 3. ed. Porto Alegre: Artmed, 2009. 632 p.
KLINK, C. A.; MACHADO, R. B. A conservação do Cerrado brasileiro. Megadiversidade, Rio de Janeiro, v. 1, n. 1, p. 147-155, 2005.
MAURO-DÍAZ, G.; LENCINAS, J. D.; DEL VALLE, H. Introducción a la fotografía hemisférica en ciencias forestales. Madera y Bosques, Veracruz, v. 20, n. 1, p. 109-117, 2014.
MICROSOFT. Microsoft Excel 2010. [S. l.], 2010.
MORELLATO, L. P. C. et al. Phenology of Atlantic Rain Forest trees: a comparative study. Biotropica, Washington, v. 32, n. 4, p. 811-823, 2000.
MYERS, N. et al. Biodiversity hotspots for conservation priorities. Nature, London, v. 403, n. 6772, p. 853-858, 2000.
NICOTRA, B. A.; CHAZDON, R. L.; IRIARTE, S. V. B. Spatial heterogeneity of light and woody seedling regeneration in Tropical Wet Forests. Ecology, Washington, v. 80, n. 6, p. 1908-1926, 1999.
OLIVEIRA-FILHO, A. T.; FLUMINHAN-FILHO, M. Ecologia da vegetação do Parque Florestal Quedas do Rio Bonito. Cerne, Lavras, v. 5, n. 2, p. 51-64, 1999.
OVERBECK, G. E. et al. Fine-scale post-fire dynamics in Southern Brazilian subtropical grassland. Journal of Vegetation Science, Uppsala, v. 16, p. 655-664, 2005.
R CORE TEAM. R: a language and environment for statistical computing. Vienna: R Foundation for Statistical Computing, 2004. Disponível em: http://www.R-project.org/.
RICH, P. M. et al. Long-term study of solar radiation regimes in a tropical wet forest using quantum sensors and hemisferical photography. Agricultural and Forest Meteorology, Amsterdam, v. 65, p. 107-127, 1993.
SANTOS, N. D. et al. Bryophytic and phytogeographical aspects of two types of forest of the Serra do Mar State Park, Ubatuba/SP, Brazil. Biota Neotropica, Campinas, v. 11, n. 2, p. 425-438, 2011.
SIMON, M. F. et al. Recent assembly of the Cerrado, a neotropical plant diversity hotspot, by in situ evolution of adaptations to fire. Proceedings of the National Academy of Sciences, Washington, v. 106, n. 48, p. 20359-20364, 2009.
SINGH, K. P.; KUSHWAHA, C. P. Emerging paradigms of tree phenology in dry tropics. Current Science, Bangalore, v. 89, n. 6, p. 964-974, 2005.
SOUZA, F. M.; GANDOLFI, S.; RODRIGUES, R. R. Deciduousness influences the understory community in a Semideciduous Tropical Forest. Biotropica, Kansas, v. 46, n. 5, p. 512-515, 2014.
TABARELLI, M. et al. Prospects for biodiversity conservation in the Atlantic Forest: lessons from aging human-modified landscapes. Biological Conservation, Essex, v. 143, n. 10, p. 2328-2340, 2010.
TEIXEIRA, A. P.; ASSIS, M. A. Relação entre heterogeneidade ambiental e distribuição de espécies em uma floresta paludosa no Município de Cristais Paulista, SP, Brasil. Acta Botanica Brasilica, Belo Horizonte, v. 23, n. 3, p. 843-853, 2009.
