Litterfall and litter nutrient content in two Brazilian Tropical Forests

Moraes, Regina Maria de; Delitti, Welington Bráz Carvalho; Vuono, Yara Struffaldi-De

doi:10.1590/s0100-84041999000100002

Cited by 69 publications

(74 citation statements)

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“…Peaks in litterfall at the beginning of the rainy season (the main pattern) were observed in other studies in Atlantic rain forests in Brazil (Jackson 1978, Sampaio et al 1993, Custódio-Filho et al 1996, Louzada 1997, Moraes et al 1999, Portes 2001, Gama-Rodrigues & Barros 2002, Pinto & Marques 2003, Britez et al 2005 (table 3). Abscission in evergreen rain forests occurs with more intensity when day length, solar radiation, temperature, air relative humidity, rainfall and consequent leaf fl ush increases (Larcher 1986, van Schaik et al 1993.…”

Section: Meteorological Variablessupporting

confidence: 58%

“…This is also observed in several litterfall studies in Atlantic rain forests in Brazil (Jackson 1978, Sampaio et al 1993, Custódio-Filho et al 1996, Moraes et al 1999, Portes 2001, Britez et al 2005. However, each plant community is comprised by many species, each one with different cycles and responses to its environment.…”

Section: Introductionsupporting

confidence: 58%

“…For site 2, litterfall (3.0 ton ha -1 year -1 ) was a little lower than in pioneer Atlantic coastal formations (restingas) reported by Moraes et al (1999), Britez et al (2005) and . Secondary Atlantic rain forests affected by air pollution presented lower annual litter production, between 1.8 and 5.7 ton ha -1 year -1 (Leitão-Filho et al 1993, Domingos et al 2000.…”

Section: Meteorological Variablesmentioning

confidence: 56%

“…Therefore, many studies estimated litter production in different regions of the world, mainly tropical and temperate forests (Bray & Gorham 1964, Vitousek 1984, Vogt et al 1986). In Brazilian Atlantic rain forests litterfall studies have been published (Jackson 1978, Varjabedian & Pagano 1988, Sampaio et al 1993, Leitão-Filho et al 1993, Oliveira & Lacerda 1993, Custódio-Filho et al 1996, Mazurec & Villela 1998, Louzada 1997, Domingos et al 1997, Moraes et al 1999, Domingos et al 2000, Portes 2001, GamaRodrigues & Barros 2002, Pinto & Marques 2003, Britez et al 2005 but data on vegetation growing on alluvial soils are scarce or non-existent, despite their critical situation. Those studies demonstrate the importance of this kind of research.…”

Section: Introductionmentioning

confidence: 99%

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Patterns of litter production in a secondary alluvial Atlantic Rain Forest in southern Brazil

Scheer¹,

Gatti²,

Wisniewski³

et al. 2009

Rev. bras. Bot.

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-(Patterns of litter production in a secondary alluvial Atlantic Rain Forest in southern Brazil). Above-ground litter production is one of the most accessible ways to estimate ecosystem productivity, nutrient fl uxes and carbon transfers. Phenological patterns and climatic conditions are still not fully explained well for tropical and subtropical forests under less pronounced dry season and non-seasonal climates, as well as the interaction of these patterns with successional dynamics. Monthly litterfall was estimated for two years in a 9 to 10 year old secondary alluvial Atlantic Rain forest. Total litterfall was higher in the site with more developed vegetation (6.4 ± 1.2 ton ha -1 year -1 ; 95% confi dence interval) as compared to the site with less developed vegetation (3.0 ± 1.0 ton ha -1 year -1 ). The monthly production of 11 litter fractions (eight fractions comprising the leaf litter of the seven main species of the community and other species; reproductive parts, twigs ≤ 2 cm diameter, and miscellaneous material) were correlated with meteorological variables making possible to identify three patterns of deposition. The main pattern, dominated by leaf-exchanging species, consisted of a cycle with the highest litterfall at the beginning of the rainy season, preceding by basically three months the peaks of the annual cycles of rainfall and temperatures. Other two patterns, dominated by brevi-deciduous species, peaked at the end of the rainy season and at the end of the non-rainy season. Tropical and subtropical dry forests that present the highest leaf fall gradually earlier than rain forests (as the studied sites) are possibly related to the start of senescence process. It seems that such process is triggered earlier by a more severe hydric stress, besides other factors linked to a minor physiological activity of plants that result in abscission.Key words -litterfall, meteorological variables, phenology, primary productivity, sucession RESUMO -(Padrões de produção de serapilheira em uma Floresta Ombrófi la Densa aluvial secundária no Sul do Brasil). A produção de serapilheira é uma das variáveis mais acessíveis para se estimar a produtividade primária, fl uxos de nutrientes e transferências de carbono em ecossistemas terrestres. Padrões fenológicos e condições climáticas ainda não estão bem explicados para fl orestas tropicais e subtropicais sob climas com sazonalidade pouco pronunciada, muito menos a interação desses padrões com a dinâmica sucessional. A produção mensal de serapilheira foi estimada durante dois anos em uma Floresta Ombrófi la Densa aluvial durante o nono e décimo ano de regeneração. O sítio com vegetação mais desenvolvida apresentou maior produção de serapilheira (6,4 ton ha -1 ano -1 ), quando comparado com o sítio com vegetação menos desenvolvida (3,0 ton ha -1 ano -1 ). As produções mensais de 11 frações de serapilheira foram correlacionadas com variáveis meteorológicas possibilitando identifi car três padrões de deposição. O padrão principal, dominado por espécies sempre ver...

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Section: Meteorological Variablessupporting

confidence: 58%

Section: Introductionsupporting

confidence: 58%

Section: Meteorological Variablesmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Patterns of litter production in a secondary alluvial Atlantic Rain Forest in southern Brazil

Scheer¹,

Gatti²,

Wisniewski³

et al. 2009

Rev. bras. Bot.

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“…Segundo Moraes et al (1999) e Rodrigues e Leitão Filho (2001), a concentração de nitrogênio e fósforo originada pelo processo de decomposição da serrapilheira pode ser diferente em cada ecossistema, de acordo com propriedades do ambiente. A queda e a decomposição de serrapilheira fina representam uma maior entrada anual de fósforo para o ecossistema, enquanto as chuvas representam a maior fonte de nitrogênio (Luizão, 1989).…”

Section: Variação Temporal Dos Teores De Nitrogênio (N) Fósforo (P) unclassified

Contribuição de folhas na formação da serrapilheira e no retorno de nutrientes em floresta de transição no norte de Mato Grosso

et al. 2009

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RESUMOEste estudo foi desenvolvido numa área de floresta de transição Amazônia-Cerrado no norte de Mato Grosso. Teve como objetivo quantificar a dinâmica da produção e acúmulo e as partes constituintes da serrapilheira, bem como a participação das folhas no retorno do nitrogênio, fósforo e carbono ao solo por meio da decomposição. Foram coletados mensalmente durante um ano dados de serrapilheira total produzida, serrapilheira total acumulada no solo e avaliada a decomposição de folhas no período de seca e de chuvas. A produção de serrapilheira apresentou variações sazonais com maiores valores no período seco e predomínio da fração foliar durante todo o ano. Por outro lado, a serrapilheira acumulada não apresentou diferenças significativas entre o período de seca e o chuvoso como também correlação significativa com a serrapilheira produzida. A decomposição da serrapilheira exclusiva de folhas foi mais intensa no período chuvoso e em ordem decrescente de espécies, em T. schomburgkii, Thyrsodium sp, B. lactescens e P. sagotianum. A espécie P. sagotianum tanto no período seco quanto no chuvoso apresentou maior resistência à decomposição. O potencial de retorno de nitrogênio ao solo foi da ordem de 70,3 kg.ha -1 .ano -1 , para o fósforo, de 76,1 kg.ha -1 .ano -1 e para o carbono, de 3,5 ton.ha -1 .ano -1 . Houve uma correlação entre a decomposição exclusiva de folhas e o retorno de nitrogênio e fósforo para todas as espécies estudadas no período de seca. No período chuvoso foi registrada correlação significativa somente para nitrogênio e o carbono para a espécie P. sagotianum.PALAVRAS-CHAVE: ciclagem de nutrientes, serrapilheira, floresta de transição. Leaf contribution to litterfall and litterpool and nutrients recycling in transition forest in Mato Grosso ABSTRACTThis study was conducted in an area of Amazonia-Cerado transition forest in the noirth of Mato Grosso state, Brazil. The main objectives of the study was to quantify the variability of litter fall and litter pool biomass (leaves, flowers, fruits, and wood), and the participation of the leaves in the return of nitrogen, phosphorus and carbon to the soil through decomposition. Litter was collected monthly during one year and leaves decomposition was analyzed during the dry and rainy seasons. Litter fall varied along the year with higher values in the dry season and predominance of the leaf fraction. Nevertheless, there was no significant difference between dry and rainy seasons for litter pool as well as significant correlation between litter pool and litter fall. Decomposition of leaves was more intense in the rainy season in order of decreasing species: T. schomburgkii, Thyrsodium sp, B. lactescens and P. sagotianum. The species P. sagotianum in both dry and rainy seasons showed most slowly decomposition. The potential return was 70.3 kg.ha -1 .year -1 for nitrogen, 76.1 kg.ha -1 .years -1 for phosphorus, 3.5 ton.ha -1 . years -1 for carbon. There was significant correlation between leave decomposition and nitrogen and phosphorus return for all species ana...

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Nutrient limitation in tropical secondary forests following different management practices

Nagy

Rastetter

Neill

et al. 2017

Ecological Applications

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Secondary forests now make up more than one-half of all tropical forests, and constraints on their biomass accumulation will influence the strength of the terrestrial carbon (C) sink in the coming decades. However the variance in secondary tropical forest biomass for a given stand age and climate is high and our understanding of why is limited. We constructed a model of terrestrial C, nitrogen (N), and phosphorus (P) cycling to examine the influence of disturbance and management practices on nutrient limitation and biomass recovery in secondary tropical forests. The model predicted that N limited the rate of forest recovery in the first few decades following harvest, but that this limitation switched to P approximately 30-40 yr after abandonment, consistent with field data on N and P cycling from secondary tropical forest chronosequences. Simulated biomass recovery agreed well with field data of biomass accumulation following harvest (R = 0.80). Model results showed that if all biomass remained on site following a severe disturbance such as blowdown, regrowth approached pre-disturbance biomass in 80-90 yr, and recovery was faster following smaller disturbances such as selective logging. Field data from regrowth on abandoned pastures were consistent with simulated losses of nutrients in soil organic matter, particularly P. Following any forest disturbance that involved the removal of nutrients (i.e., except blowdown), forest regrowth produced reduced biomass relative to the initial state as a result of nutrient loss through harvest, leaching and/or sequestration by secondary minerals. Differences in nutrient availability accounted for 49-94% of the variance in secondary forest biomass C at a given stand age. Management lessons from this study are the importance of strategies that help retain nutrients on site, recognizing the role of coarse woody debris in immobilization and subsequent release of nutrients, and the potential for nutrient additions to enhance biomass growth and recovery in secondary tropical forests.

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Litterfall and litter nutrient content in two Brazilian Tropical Forests

Cited by 69 publications

References 0 publications

Patterns of litter production in a secondary alluvial Atlantic Rain Forest in southern Brazil

Patterns of litter production in a secondary alluvial Atlantic Rain Forest in southern Brazil

Contribuição de folhas na formação da serrapilheira e no retorno de nutrientes em floresta de transição no norte de Mato Grosso

Nutrient limitation in tropical secondary forests following different management practices

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