14 research outputs found
Influence of fire history and soil properties on plant species richness and functional diversity in a neotropical savanna
Temporal dynamics of the shrub and herbaceous layer of an area of moist grassland in Alto Paraíso de Goiás, Brazil
Este trabalho avaliou a dinâmica estrutural e fl orística de uma comunidade de espécies herbáceo-arbustivas
de uma área de campo limpo úmido em Alto Paraíso de Goiás, o primeiro inventário realizado em 2000 (T0) e o
segundo em 2007 (T1). A diversidade de Shannon entre os períodos foi comparada pelo teste-t de Hutcheson e a
similaridade fl orística, pelo índice de similaridade de Chao-Sørensen. As relações fl orísticas e a cobertura, entre os
períodos e as linhas, foram avaliadas por meio de análises de correspondência retifi cada (DCA). Foram amostradas
98 espécies, 88 no T0 e 67 no T1, sendo 31 exclusivas do T0 e 10 do T1. A diversidade fl orística na comunidade
foi elevada nos dois períodos, porém diferente entre esses (t = 7,12; p < 0,001), devido a variação no número e
cobertura das espécies. A similaridade entre os dois inventários foi alta (Chao-Sørensen ± IC = 0,841 ± 0,074). A
ordenação por DCA indicou relações entre a composição fl orística e a cobertura com o gradiente de umidade e
de matéria orgânica no solo identifi cados em T0. Houve modifi cações nas linhas em zonas sazonais, as quais se
tornaram mais semelhantes às linhas constantemente saturadas por água. Em um intervalo de sete anos o campo
limpo úmido apresentou mudanças na composição fl orística e, principalmente na estrutura devido o aumento da
cobertura de espécies perenes, cespitosas e entouceiradas, que foram favorecidas pela maior umidade no solo em
resposta à elevação da pluviosidade da região. __________________________________________________________________________________________ ABSTRACTTh is study evaluated the fl oristic and structural dynamics of a community of herbaceous-shrub species
in an area of moist grassland in Alto Paraíso de Goiás. Th e fi rst inventory was undertaken in 2000 (T0) and the
second in 2007 (T1). Shannon’s diversity between the periods was compared by Hutchesons´s t-test, and the
fl oristic similarity by the Chao-Sørensen similarity index. Floristic composition and cover, between periods and
lines, were evaluated by detrended correspondence analysis (DCA). We sampled 98 species, 88 at T0 and 67 at T1;
31 were unique to T0 and 10 to T1. Floristic diversity in the community was high in both periods, but diff erent
between them (t = 7.12, p <0.001), due to variation in species number and coverage. Similarity between the two
surveys was high (Chao-Sørensen CI = ± 0.841 ± 0.074). Th e DCA ordination indicated relationships between the
fl oristic composition and cover with a gradient of moisture and organic matter in the soil identifi ed in T0. Th ere
were changes in the lines in the seasonal zones, which became more similar in those constantly saturated with
water. During an interval of seven years the moist grassland showed changes in fl oristic composition and mainly
in structure due to increased cover of the clumped tussock perennial species, which were favored by higher soil
moisture due to high rainfall in the region
LITTERFALL ASSESSEMENT IN A FRAGMENT OF SECONDARY TROPICAL FOREST, IBIÚNA, SP, SOUTHEASTERN BRAZIL1
Produção de serrapilheira em um fragmento de floresta ombrófila mista com sistema de faxinal
Litterfall dynamics in a iron-rich rock outcrop complex in the southeastern portion of the Iron Quadrangle of Brazil
Litterfall production in intact and selectively logged forests in southern of Amazonia as a function of basal area of vegetation and plant density
Litter Fall And Leaf Decomposition In Cerradão Jataí Reserve, Municipality Of Luiz Antônio, São Paulo State, Brazil [produção De Serapilheira E Decomposição Do Material Foliar Em Um Cerradão Na Estação Ecológica De Jataí, Município De Luiz Antônio, Sp, Brasil]
We estimate litter production and leaf decomposition rate in a cerradão area, physiognomy little studied and very threatened in São Paulo State. During the period of study, litter production was 5646.9 kg.ha-1.year-1, which the 'leaf' fraction corresponded to 4081.2 kg.ha-1.year-1; the 'branch' fraction, to 1066.1 kg.ha-1.year-1; the 'reproductive structures' fraction, to 434.1 kg.ha-1.year-1; and the 'miscellaneous' fraction to 65.5 kg.ha-1.year-1. Litter production was highly seasonal and negatively correlated with relative humidity and air temperature. Leaf production was negatively correlated with relative humidity, rainfall, and air temperature. There was no significant difference between litter production found in this study and those in two other sites with cerradão and semideciduous forest, but these physiognomies differed significantly from the cerrado sensu stricto. Leaf decomposition rate (K) was 0.56. Half-life of the decomposing material was 1.8 years and turnover time was 2.3 years.2014959Babbar, L.I., Ewol, J.J., Decomposition del follaje en diversos ecossitemas sucessionales tropicales (1989) Biotropica, 21 (1), pp. 20-29Barros, M.A.G., Caldas, L.S., Acompanhamento de eventos fenológicos apresentados por cinco gêneros nativos do cerrado (1980) Brasil Florestal, 42, pp. 7-12Bocock, K.L., Gilbert, O.J.W., The disappearance of litter under different woodland conditions (1957) Plant and Soil, 9, pp. 179-185Borchet, R., Phenology and ecophysiology of tropical trees: Erythrina poeppigiana (1980) Ecology, 61, pp. 1065-1074Bray, J.R., Gorham, E., Litter production in forests of the world (1964) Advances in Ecology Research, 2, pp. 101-157Cesar, O., Nutrientes minerais na serapilheira produzida na mata mesófila semidecídua da Fazenda Barreiro Rico, Município de Anhembi, SP (1993) Revista Brasileira de Biologia, 53 (4), pp. 659-669Chabot, B.F., Hicks, D.J., The ecology of leaf life span (1982) Annual Rewiew of Ecology and Systematics, 13, pp. 229-243Dale, J.E., (1982) The Growth of Leaves, , London, Edward Arnold LimitedDantas, M., Philipson, J., Litterfall and litter nutrient content in primary and secondary Amazonian "terra firme" rain forest (1989) Journal of Tropical Ecology, 5 (1), pp. 27-36Delitti, W.B.C., Ciclagem de nutrientes em cerrados (1998) Anais Do VIII Seminário Regional de Ecologia, pp. 1031-1045. , São Carlos, São PauloDuvigneaud, P., Denayer-De Smet, S., Biological cycling of minerals in the temperate deciduous forest (1969) Analysis of Temperate Forest Ecosystems, pp. 199-225. , D.E. Reichle (ed.). New York, SpringerEwel, J.J., Litter fall and leaf decomposition in a tropical forest succession in eastern Guatemala (1976) Journal of Ecology, 64 (1), pp. 293-308Facelli, J.M., Pickett, S.T.A., Plant litter: Its dynamics and effects on plant community structure (1991) The Botanical Rewiew, 57, pp. 1-32Herrera, R., Jordan, C.F., Medina, E.E., Klinge, H., How Humam Activities Disturb Cycles of Tropical Rainforest in Amazonia (1981) Ambio, 10 (2), pp. 109-114Hinkel, R., Panitz, C.M.N., Estudo comparative da produção de serapilheira de uma área de Mata Atlântica e de um povoamento de Pinus elliotti Engelm. var. elliotti na Ilha de Santa Catarina, Brasil (1999) Biotemas, 12 (1), pp. 67-93Hopkins, B., Vegetation of the Olokemeju Forest Reserve (Nigeria) IV: The litter and soil with special reference to their seasonal changes (1966) Journal of Ecology, 54 (3), pp. 687-703Jackson, J.F., Seasonality of flowering and leaf-fall in a Brazilian subtropical lower montane moist forest (1978) Biotropica, 10 (1), pp. 38-42Kronka, F.J.N., (1998) Áreas de Domínio Do Cerrado No Estado de São Paulo, , São Paulo, Secretaria do Meio Ambiente, São PauloLeitão-Filho, H.F., (1993) Ecologia Da Mata Atlântica Em Cubatão (SP), , São Paulo, EDUNESP/EDUNICAMP, SPMantovani, W., Martins, F., Variações fenológicas das espécies do cerrado da Reserva Biológica de Mogi Guaçu, Estado de São Paulo (1988) Revista Brasileira de Botânica, 11, pp. 113-122Martins, S.V., Rodrigues, R.R., Produção de serapilheira em clareiras de uma floresta estacional semidecidual no município de Campinas, SP (1999) Revista Brasileira Botânica, 22 (3), pp. 405-412Mason, C.F., (1980) Decomposição, , São Paulo, EPU-EDUSPMeguro, M., Vinueza, G.N., Delitti, W.B.C., Ciclagem de nutrientes na Mata Mesófila Secundária, São Paulo, I: Produção e conteúdo de nutrientes minerais no folhedo (1979) Boletim de Botânica Da Universidade de São Paulo, 7, pp. 11-31Meguro, M., Vinueza, G.N., Delitti, W.B.C., Ciclagem de nutrientes na Mata Mesófila Secundária, São Paulo, III - Decomposição do material foliar e liberação dos nutrientes minerais (1980) Boletim de Botânica Da Universidade de São Paulo, 8, pp. 7-20Monasterio, M., Sarmiento, G., Phenological strategies of plant species in the tropical savanna in the semideciduous forest of the Venezuelen Llanos (1976) Journal of Biogeography, 3, pp. 315-346Moraes, J.A.P.V., Perez, S.C.J.G.A., Júnior-Carvalho, L.F., Curso diário e sazonal do potencial de água e resistência estomática em plantas de cerrado (1989) Annals of the Missouri Botanical Garden, 27, pp. 13-23Moraes, J.A.P.V., Prado, C.H.B.A., Photosynthesis and water relations in cerrado vegetation (1998) Ecophysiological Strategies of Xerophytic and Amphibious Plants in the Neotropics, pp. 45-63. , F.R. Scarano & A.C. Franco (eds.). Rio de Janeiro, Universidade Fedeal do Rio de JaneiroMoraes, R.M., Delitti, W.B.C., Struffaldi-De Vuono, Y., Litterfall and litter nutrient content in two Brazilian Tropical Forests (1999) Revista Brasileira de Botânica, 22 (1), pp. 9-16Morellato, L.P.C., Rodrigues, R.R., Leitão-Filho, H.F., Joly, C.A., Estudo fenológico comparativo de espécies arbóreas de floresta de altitude e floresta mesófila semidecídua na Serra do Japí, Jundiaí, SP (1989) Revista Brasileira de Botânica, 13, pp. 27-32Nimer, E., Clima (1977) Geográfica Do Brasil, pp. 35-38. , Rio de Janeiro, IBGERJOlson, J.S., Energy storage and the balance of producers and decomposers in ecological systems (1963) Ecology, 44, pp. 322-331Pagano, S.N., Produção de folhedo em mata mesófila semidecídua no Município de Rio Claro, SP (1989) Revista Brasileira de Biologia, 49 (3), pp. 633-639Paulilo, M.T., Felippe, G.M., Crescimento de folhas de árvores de Qualea grandiflora Mart (1992) Revista Brasileira de Botânica, 15, pp. 85-93Pereira-Silva, E.F.L., Santos, J.E., Kageyama, P.Y., Hardt, E., Florística e fitossociologia dos estratos arbustivo e arbóreo de um remanescente de cerradão em uma Unidade de Conservação do estado de São Paulo (2004) Revista Brasileira de Botânica, 27 (3), pp. 533-544Peres, J.R.R., Suhet, A.R., Vargas, M.A.T., Drozdowics, A., Litter production in areas of Brazilian "cerrados" (1983) Pesquisa Agropecuária Brasileira, 18 (9), pp. 1037-1043Perez, S.C.J.G.A., Moraes, J.A.P.V., Determinações do potencial hídrico, condutância estomática e potencial osmótico em espécies dos estratos arbóreo, arbustivo e herbáceo de um cerradão (1991) Revista Brasileira de Fisiologia Vegetal, 3, pp. 27-37Pires, A.M.Z.C.R., Santos, J.E., Pires, J.S.R., Caracterização e diagnóstico ambiental de uma unidade da paisagem. Estudo de caso: Estação Ecológica de Jataí e Estação Experimental de Luiz Antônio (2000) Estudos Integrados Em Ecossistemas. Estação Ecológica de Jataí Vol. I, 1, pp. 1-26. , J.E. Santos & J.S.R. Pires (eds.). São Carlos, RimaReich, P., Borchet, R., Water stress and tree phenology in a tropical dry forest in the lowlands of Costa Rica (1984) Journal of Botany, 73, pp. 164-174Rizzo, J.A., Centeno, A.J., Souza, J.S., Filgueiras, T.S., Levantamento de dados em áreas de cerrado e da floresta caducifólia tropical do Planalto Centro-Oeste (1971) III Simpósio Sobre O Cerrado, pp. 103-109. , São Paulo, Edgard Blucher/EDUSPRochow, J.J., Litter fall relations in a Missouri Forest (1974) Oikos, 25, pp. 80-85Sampaio, E.V.S.B., Nunes, K.S., Lemos, E.E., Nutrient cycling at Dois Irmãos forest (Recife, Pernambuco, Brasil) through litterfall (1988) Pesquisa Agropecuária Brasileira, 23 (10), pp. 1055-1062Santos, J.E., Mozeto, A.A., Programa de Análise de Ecossistemas e Monitoramento Ambiental: Estação Ecológica de Jataí (Luiz Antônio, SP) (1992) Ecologia de Áreas Alagáveis de Planície de Inundação Do Rio Mogi-Guaçu, , São Carlos, Projeto Jataí. Universidade Federal de São CarlosSantos, P.F., Rodrigues, G.S., Avaliação dos métodos para estimativa da decomposição do folhedo em ecossistema de cerrado (Corumbataí-SP) (1982) Ciência e Cultura, 34 (7), p. 559Schilittler, E.H.M., Marinis, G., Cesar, O., Produção de serapilheira na floresta do Morro do Diabo, Pontal do Paranapanema, SP (1993) Naturalia, 18, pp. 135-147Scott, D.A., Proctor, J., Thompson, J., Ecological studies on a lowland evergreen rain forest on Maracá Island, Roraima, Brazil. II. Litter and nutrient cycling (1992) Journal of Ecology, 80, pp. 705-717Setzer, J., (1966) Atlas Climatológico Do Estado de São Paulo, , São Paulo, Comissão Interestadual da Bacia do Paraná-Paraguai, CESPSingh, J.S., Gupta, S.R., Plant decomposition and soil respiration in terrestrial ecosystems (1977) The Botanical Review, 43, pp. 449-528Swift, M.J., Heal, O.W., Anderson, J.M., (1979) Decomposition in Terrestrial Ecosystems, , Oxford, Blackwell Scientific PublicationsVarjabedian, R., Pagano, S.N., Produção e decomposição do folhedo em um trecho de mata atlântica de encosta no município do Guarujá, São Paulo (1988) Acta Botanica Brasilica, 1, pp. 243-256Vibrans, A.C., Sevegnani, L., Produção de serapilheira em dois remanescentes da floresta ombrófila densa em Blumenau, SC (2000) Revista de Estudos Ambientais, 1 (2), pp. 103-116Villela, D.M., Proctor, J., Litterfall mass and chemistry and nutrient retranslocation in a monodominant forest on Maracá Island, Roraima, Brazil (1999) Biotropica, 31 (2), pp. 198-211Walter, H., (1986) Vegetação e Zonas Climáticas, , São Paulo, EPUWerneck, S.M., Pedralli, G., Gieseke, L.F., Produção de serapilheira em três trechos de uma floresta semidecídua com diferentes graus de perturbação na Estação Ecológica do Tripuí, Ouro Preto, MG (2001) Revista Brasileira de Botânica, 24 (2), pp. 195-198Whittaker, R.H., (1975) Communities and Ecosystems, , London, Coller-MacmillanWitkamp, M., Ausmus, B.S., Process in decomposition and nutrient transfer in forest systems (1976) The Role of Terrestrian and Aquatic Organisms in Decomposition Process, pp. 375-396. , J.M. Anderson & A. Macfadyen (eds.). Oxford, Blackwell Scientific PublicationsZar, J.H., (1999) Bioestatistical Analysis, , New Jersey, Prentice Hal
Flower Functional Trait Responses To Restoration Time
Questions: (1) Do species richness, flower functional diversity and redundancy of tree and non-tree species increase with restoration age; (2) are the flower traits of the reference forest similar to those found in restored sites; and (3) does species originality, in terms of unique combinations of different set of flower traits, differ among sites? Location: Forests restored by planting a high diversity assemblage of tree species, within the Atlantic Rain Forest, Brazil. Methods: We sampled all reproductive individuals (353 species) and classified them in terms of floral type, colour, size, generalization level and openness. As most trees were planted and non-tree species (sub-shrub, shrub, herbs, epiphytes, climbers and hemi-parasitic plants) were mostly naturally established, we analysed them in separate analyses. We compared species richness, functional diversity, redundancy and originality among sites. Moreover, we identified optimal subsets of flower traits to describe vegetation succession trends. Results: (1) Flower functional diversity of tree species could be achieved after two decades of restoration, but remained far from reference values for non-tree species. The same gap regarding reference values occurred with species richness, which increased over restoration periods, although were far from the reference values. Redundancy and functional diversity are not related to restoration age. (2) Red/burgundy colour, gullet and bell-funnel shape and large size were identified as indicators of the reference forest flowers. Different indicator traits were found for each restoration sites. (3) Sites were similar regarding originality for tree and for non-tree species. Conclusion: A highly diverse species pool seems to promise to increase richness and functional diversity of tree species, but not of non-tree species. Trait analyses have important implications for restoration projects and can be used instead of species taxonomic identity, especially for highly diverse tropical forests. Such functional diversity may be advanced through a priori definition of which species from the regional pool can be used in plantings for forest restoration, with special attention to functional traits of non-tree species. Otherwise, restoration sites in highly fragmented landscapes will not reach functional diversity of reference sites, even after a five-decade period
The role of fire in structuring trait variability in Neotropical savannas
Intraspecific trait variability plays a fundamental role in community structure and dynamics; however, few studies have evaluated its relative importance to the overall response of communities to environmental pressures. Since fire is considered a key factor in Neotropical savannas, we investigated to what extent the functional effects of fire in a Brazilian savanna occurs via intra- or interspecific trait variability. We sampled 12 traits in communities subjected to three fire regimes in the last 12 years: annual, biennial, and protected. To evaluate fire's relative effects, we fitted a general linear mixed models with species as random and fire as fixed factors, using: (1) all species in the communities (i. e., considering intra- and interspecific variabilities); (2) 18 species common to all fire regimes (i. e., intraspecific variability only); and (3) all species with their overall average trait values (i. e., interspecific variability only). We assessed the relative role of intra- or interspecific variability by comparing the significance of each trait in the three analyses. We also compared the within and between fire variabilities with a variance component analysis. Five traits presented larger intraspecific than interspecific variability, and the main effect of fire occurred at the intraspecific level. These results confirm that it is important to consider intraspecific variability to fully understand fire-prone communities. Moreover, trait variability was larger within than among fire regimes. Thus, fire may act more as an external filter, preventing some of the species from the regional pool from colonizing the cerrado, than as an internal factor structuring the already filtered cerrado communities. © 2012 Springer-Verlag.We are grateful to Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for financial support and scholarships granted to the authors.Peer Reviewe