ANNUAL VARIATION IN CANOPY OPENNESS, AIR TEMPERATURE AND HUMIDITY IN THE UNDERSTORY OF THREE FORESTED SITES IN SOUTHERN BAHIA STATE, BRAZIL
DOI:
https://doi.org/10.5902/198050988445Keywords:
Atlantic Forest, microclimate, rainfall, vapor pressure deficitAbstract
http://dx.doi.org/10.5902/198050988445Aiming at contributing to the knowledge of physical factors affecting community structure in Atlantic Forest remnants of southern Bahia state, Brazil, we analyzed the annual variation in the understory microclimate of a hillside forest fragment in the ‘Reserva Particular do Patrimônio Natural Serra do Teimoso’ (RST) and a rustic cacao agroforestry system (Cabruca), located nearby the RST. Canopy openness (CO), air temperature (Ta), air relative humidity (RH) and vapor pressure deficit (VPD) data were collected between April, 2005 and April, 2006 at the base (RSTB, 340 m) and the top (RSTT, 640 m) of the RST and at the Cabruca (CB, 250 m). Data of rainfall, Ta, RH and VPD were also collected in an open area (OA, 270 m). The highest rainfalls (> 100 mm) occurred in November, 2005 and April, 2006, whereas October, 2005 was the driest month (< 20 mm). CO ranged between 2.5 % in the CB (April, 2006) and 7.7 % in the RST (October, 2005). Low rainfall in October, 2005 affected VPDmax in all sites. Those effects were more pronounced in OA, followed by CB, RSTBand RSTT. During the period of measurements, the values ofTa, RH and VPD in CB were closer to the values measured in OA than to the values measured inside the forest.
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References
AMORIM, A. M. et al. Angiospermas em remanescentes de floresta montana no sul da Bahia, Brasil. Biota Neotropica, São Paulo, v. 9, p. 313-348, 2009.
AMORIM, A.M. et al. The vascular plants of a forest fragment in southern Bahia, Brazil. SIDA, Dallas, v. 21, p. 1727-1752, Aug. 2005.
BAHIA, GOVERNO DO ESTADO. Caracterização Climatológica: Programa de Recuperação das Bacias dos Rios Cachoeira e Almada. Ilhéus: Superintendência de Recursos Hídricos, 2001.
CHEN, J. et al. Microclimate in Forest Ecosystem and Landscape Ecology. BioScience, Washington, v. 49, p. 288-297, Jan. 1999.
CUNNINGHAM, S. Effects of vapour pressure deficit on growth of temperate and tropical evergreen rainforest trees of Australia. Acta Oecologica, Maryland Heights, v. 30, p. 399-406, Nov./Dec. 2006.
CUNNINGHAM, S. Stomatal sensitivity to vapour pressure deficit of temperate and tropical evergreen rainforest trees of Australia. Trees, Berlin, v. 18, p. 399-407, July 2004.
FARIA, D. et al. Ferns, frogs, lizards, birds and bats in forest fragments and shade cacao plantations in two contrasting landscapes in the Atlantic Forest, Brazil. Biodiversity and Conservation, Dordrecht, v. 16, p. 2335–2357,July 2007.
FRANKS, P. J.; FARQUHAR, G. D. A relationship between humidity response, growth form and photosynthetic operating point in C3 plants. Plant Cell and Environment, Bognor Regis, v. 22, p. 1337-1349, Nov. 1999.
FRAZER, G. W.; CANHAM, C. D.; LERTZMAN, K. P. Gap Light Analyzer (GLA). Millbrook: Simon Fraser University, 1999.
HERNANDES, J. L.; PEDRO JR., M. J.; BARDIN, L. Diferenças estacionais entre variáveis microclimáticas para ambientes de interior de mata, vinhedo e posto meteorológico em Jundiaí (SP). Bragantia, Campinas, v. 61, p. 169-180, maio/ago. 2002.
HOGAN, K. P.; MACHADO, J. L. La luz solar: consecuencias biológicas y medición. In: GUARIGUATA, M. R.; KATTAN, G. H. (Eds.) Ecologia y conservación de bosques neotropicales. Cartago: Libro Universitario Regional, 2002. p.119-143.
KITAJIMA, K. Relative importance of photosynthetic traits and allocation patterns as correlates of seedling shade tolerance of 13 tropical trees. Oecologia, Berlin, v. 98, p. 419-428, Aug. 1994.
LANDSBERG, J.J. Physiological ecology of forest production. San Diego: Academic Press, 1986. 198p.
LIMA, M. A. O. Crescimento inicial de três especies arbóreas nativas e cultivadas em condições de sombreamento artificial, pleno sol e Cabruca. 2007. 58 f. Dissertação (Mestrado em Produção Vegetal) - Universidade Estadual de Santa Cruz, Ilhéus, 2007.
LÜTTGE, U. Physiological ecology of tropical plants. Berlin: Springer, 2008. 458 p.
MARTINI, A.M.Z. et al. A hot-point within a hot-spot: a high diversity site in Brazil’s Atlantic Forest. Biodiversity and Conservation, Dordrecht, v. 16, p. 3111-3128, Oct. 2007.
MARTINS, S. V.; RODRIGUES, R. R. Gap-phase regeneration in a semideciduous mesophytic forest, south-eastern Brazil. Plant Ecology, Dordrecht, v. 163, p. 51-62, Nov. 2002.
MIRANDA, R. A. C. et al. Daily characterization of air temperature and relative humidity profiles in a cocoa plantation. Pesquisa Agropecuária Brasileira, Brasilia, v. 29, p. 345-353, mar. 1994.
MIYAJI, K. I.; SILVA, W. S.; ALVIM, P. T. Productivity of leaves of a tropical tree, Theobroma cacao, grown under shading, in relation to leaf age and light conditions within the canopy. New Phytologist, Lancaster, v. 137, p. 463-472, Mar. 1997.
MORI, S.; SILVA, L. A. M. The herbarium of the “Centro de Pesquisas do Cacau” at Itabuna, Brazil. Brittonia, Berlin, v. 31, p. 177-196, Apr. 1979.
MYERS, N. et al. Biodiversity hotspots for conservation priorities. Nature, Londres, v. 403, p. 853-858, Feb. 2000.
NASCIMENTO, A. R. T.; FAGG, J. M. F.; FAGG, C. W. Canopy openness and LAI estimates in two seasonality deciduous forest on limestone outcrops in central Brazil using hemispherical photographs. Revista Arvore, Viçosa, v. 31, p. 167-176, jan./fev. 2007.
PEZZOPANE, J. E. M. et al. Caracterização da radiação solar em fragmento de Mata Atlântica. Revista Brasileira de Agrometeorologia, Santa Maria, v. 13, p. 11-19, jan./abr. 2005.
PEZZOPANE, J. E. M. et al. Temperatura do solo no interior de um fragmento de floresta secundária semidecidual. Revista Brasileira de Agrometeorologia, Santa Maria, v. 10, p. 1-8, jan./jun. 2002.
SAMBUICHI, R. H. R.; HARIDASAN, M. Recovery of species richness and conservation of native Atlantic Forest trees in the cacao plantations of southern Bahia in Brazil. Biodiversity and Conservation, Dordrecht, v. 16, p. 3681-3701, Dec. 2007.
SHULZE, E-D., BECK, E.; MULLER-HOHENSTEIN, K. Plant Ecology. Berlin: Springer, 2002. 700 p.
SILVA JÚNIOR, W.M. et al. Regeneração natural de espécies arbustivo-arbóreas em dois trechos de uma Floresta Estacional Semidecidual, Viçosa, MG. Scientia Forestalis, Piracicaba, v. 66, p. 169-179, dez. 2004.
THOMAS, W. W. et al. Diversity of woody plants in the Atlantic coastal forest of southern Bahia, Brazil. Memoirs of the New York Botanical Garden, New York, v. 100, p. 21-66, 2008.
THOMAS, W. W. et al. Composição florística e estrutura do componente arbóreo de uma área transicional de Floresta Atlântica no sul da Bahia, Brasil. Revista Brasileira de Botânica, São Paulo, v. 32, n. 1, p. 65-78, jan./mar. 2009.
THOMAS, W. W. et al. Plant endemism in two forests in Southern Bahia. Biodiversity and Conservation, Dordrecht, v. 7, p. 311-322, Mar. 1998.
THOMAS, W. W.; BARBOSA, M. R. V. Natural vegetation types in the Atlantic Coastal Forest of Northeastern Brazil. Memoirs of the New York Botanical Garden, New York, v. 100, p. 6-20, 2008.
TRICHON, V.; WALTHER, J. N.; LAUMONIER, Y. Identifying spatial patterns in the tropical rain forest structure using hemispherical photographs. Plant Ecology, Dordrecht, v. 137, p. 227-244, Aug. 1998.
