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Carbon and nutrient inputs by litterfall into three chestnut high forest stands in Northern Portugal

Patrício, Maria do Sameiro; Pereira, Ermelinda; Nunes, Luís; Monteiro, Maria do Loreto
Fonte: International Society of Horticultural Science (ISHS) Publicador: International Society of Horticultural Science (ISHS)
Tipo: Artigo de Revista Científica
ENG
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382.14203%
Litter fall in three high forest chestnut stands, located in different soil types, in Bornes, Marão and Padrela, northern Portugal, with 45, 63 and 65 years old, respectively, was collected during two years in December by a 0.5x0.5 m square method. Four kinds of samples were collected in this study – (1) leaf litter composed by vegetal materials resulting from the litter fall of the year; (2) leaf litter composed by a mixture of vegetal materials in different decomposition stages; (3) soil from 0-5 cm depth and (4) soil from 5-10 cm depth. Litter of the year was separated into the fractions leaves, branches, fruits and burs. All fractions were dried at 70°C, weighted and concentrations of N, P, K, Ca, Mg, S, B and C were measured. The total amount of litter in the three chestnut stands was 8.3, 7.7 and 12.4 Mg ha-1year-1, respectively. Leaves are the main constituents of the total litter with 54, 62 and 50 %, respectively. The proportions of the other litter fractions range from 10 to 19 % for the burs, 20 to 32 % for the branches and 4 to 10 % for the fruits. Regarding the amounts of the nutrients in the litter fractions, in general, leaves are rich in N>Ca>Mg>K>P>S; fruits are rich in N>K>Mg>Ca>P>S. In the branches, N and Ca amounts dominate clearly and the burs are rich in N and K. The return of nutrients by litterfall is relevant: it ranges from 57-142 kg ha-1 year-1 for N...

Carbon and nutrient inputs by litterfall into three chestnut high forest stands in North Portugal

Patrício, Maria do Sameiro; Pereira, Ermelinda; Nunes, Luís; Monteiro, Maria do Loreto
Fonte: Instituto Politécnico de Bragança Publicador: Instituto Politécnico de Bragança
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
388.9872%
The litterfall in three high forest chestnut stands, located in different soil types, in Bornes, Marão and Padrela, north of Portugal, with 45, 63 and 65 years old, respectively, was collected during two years in December by a quadrate method with 0.5*0.5m. To the sampling of the presented study there were collected four kinds of samples – (1) leaf litter constituted by vegetal materials resulting from the litterfall of the year; (2) leaf litter constituted by a mixture of vegetal materials in different decomposition stages; (3) soil from 0-5 cm depth and (4) soil from 5-10 cm depth. The litter of the year was separated into the fractions leaves, branches, fruits and fruit cases. The fractions were dried at 70ºC, weighted and the concentrations of N, P, K, Ca, Mg, S, B e C were measured. The total amount of litter in the three chestnut stands was 8.3, 7.7 and 12.4 Mg ha-1, respectively. Leaves are the main constituents of the total litter with 54, 62 and 50 %, respectively. The proportion of the other litter fractions varies between 10 and 19 % for the hedgehogs, 20 and 32 % for the branches and 4 and 10 % for the fruits. Regarding the concentration of the nutrients in the litter fractions, in general, leaves are rich in N>Ca>Mg>K>P>S; fruits are rich in N>K>Mg>Ca>P>S. In branches...

Carbon and nutrient inputs by litterfall into three chestnut high forest stands in North Portugal

Patrício, Maria do Sameiro; Pereira, Ermelinda; Nunes, Luís; Monteiro, Maria do Loreto
Fonte: Instituto Politécnico de Bragança Publicador: Instituto Politécnico de Bragança
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
388.9872%
The litterfall in three high forest chestnut stands, located in different soil types, in Bornes, Marão and Padrela, north of Portugal, with 45, 63 and 65 years old, respectively, was collected during two years in December by a quadrate method with 0.5*0.5m. To the sampling of the presented study there were collected four kinds of samples – (1) leaf litter constituted by vegetal materials resulting from the litterfall of the year; (2) leaf litter constituted by a mixture of vegetal materials in different decomposition stages; (3) soil from 0-5 cm depth and (4) soil from 5-10 cm depth. The litter of the year was separated into the fractions leaves, branches, fruits and fruit cases. The fractions were dried at 70ºC, weighted and the concentrations of N, P, K, Ca, Mg, S, B e C were measured. The total amount of litter in the three chestnut stands was 8.3, 7.7 and 12.4 Mg ha-1, respectively. Leaves are the main constituents of the total litter with 54, 62 and 50 %, respectively. The proportion of the other litter fractions varies between 10 and 19 % for the hedgehogs, 20 and 32 % for the branches and 4 and 10 % for the fruits. Regarding the concentration of the nutrients in the litter fractions, in general, leaves are rich in N>Ca>Mg>K>P>S; fruits are rich in N>K>Mg>Ca>P>S. In branches...

Caracterização e relações ambientais da produção de serapilheira em florestas de mangue da baía de Guanabara, Rio de Janeiro - Brasil; Characterization and environment relations of litterfall production in mangrove forest of Guanabara bay, Rio de Janeiro - Brazil

Chaves, Filipe de Oliveira
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 21/06/2007 PT
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386.11664%
Este trabalho objetivou a quantificação da serapilheira produzida nas florestas de mangue e a análise da sua relação com fatores ambientais na baía de Guanabara. A produção total média bianual variou entre 4,7 e 22,8 t.ha-1.ano-1, com média de 13,4 (± 3,79) t.ha-1.ano-1 em vinte quatro estações distribuídas no estuário. Na baía a salinidade da água intersticial nas estações demonstrou uma relação inversamente proporcional com a produção. A produção da folha abrangeu, em média, 60% da queda total de serapilheira, seguido por propágulos (18,7%) e galhos (13%). As variações temporais foram sazonais, com diferença estatistica significativa entre os meses de maior (verão) e menor (inverno) produção. Os anos de amostragem também apresentaram grandes diferenças na produção de serapilheira, ligada a queda de propágulos, particularmente de Rhizophora mangle, responsáveis em muitos casos pelos picos encontrados. As variáveis estruturais definiram importantes relações nas transversais, com regressão negativa entre a densidade e uma positiva para o DAP médio e a produção de serapilheira. Obteve-se uma correlação positiva entre a variação da produção e a temperatura média do ar, mas com coeficientes baixos. Ao final do estudo foi possível atestar a elevada importância dos manguezais como produtores de detritos na baía realçando seu importante papel dentro do estuário.; This work objectified the quantification of litterfall produced in mangrove forests and the analysis of its relation with environmental factors in Guanabara bay. The biannual average total production varied between 4...

Ciclagem de nutrientes via serapilheira em um fragmento ciliar do rio Urupá, Rondônia; Nutrient cycling via litterfall in a riparian forest of Urupá river, (Rondônia)

Cabianchi, Giovana Mendonça
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 11/06/2010 PT
Relevância na Pesquisa
388.9872%
Os objetivos deste estudo foram: estimar a produção e a decomposição de serapilheira, quantificar os macronutrientes, além de avaliar a estrutura da vegetação e a composição florística de uma floresta de várzea em uma região sob forte influência antrópica no sudoeste da Amazônia. O conhecimento destes processos é extremamente importante, uma vez que tais informações fornecem dados essenciais para estimar a produção líquida destes sistemas, sua ciclagem de nutrientes, além de auxiliar na recuperação de áreas degradadas através de planos de manejo adequados. As coletas de serapilheira foram realizadas quinzenalmente, durante o período de Setembro de 2005 a Agosto de 2007 e o experimento de decomposição foi realizado no período de um ano. O levantamento florístico e as medidas de estrutura florestal foram realizadas em campanha intensiva em Agosto de 2009. A produção média anual de serapilheira foi de 12,7 t ha-1, com elevado grau de sazonalidade, apresentando maior produção durante os meses mais secos do ano. A produção para as frações obedeceu à seguinte ordem: folhas >> galhos > miscelânea. O retorno médio anual de carbono via serapilheira foi de 5,4 t ha-1. Em termos de proporção, existem quase duas vezes mais carbono sendo depositado no período seco do que no chuvoso. A devolução média anual de N foi de 199...

Serrapilheira aplicada como biomonitor na avaliação do bosque urbano do Instituto de Pesquisas  Energéticas e Nucleares, São Paulo,SP; Litterfall as biomonitors applied the evaluation of urban forest of the Nuclear and Energy Research Institute, São Paulo, SP

Coelho, Joaquim Matheus Santiago
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 10/11/2011 PT
Relevância na Pesquisa
397.07695%
Diversos processos são considerados responsáveis pela manutenção de ecossistemas. Entre eles podemos destacar a ciclagem mineral que corresponde ao ciclo dos elementos químicos que fluem entre os compartimentos bióticos, folhas e serrapilheira, e abióticos, atmosfera e solo. Esses elementos químicos se acumulam de forma ativa via absorção nos tecidos desses organismos, possibilitando sua aplicação como biomonitor na avaliação da qualidade do ambiente. Partindo dessa premissa é possível, a partir do estudo de ciclagem bioquímica de serrapilheira, conhecer a proveniência dos elementos químicos observados nas folhas diagnose das árvores. Este trabalho teve como objetivo avaliar, em escala espacial e temporal, as características da produção e sazonalidade da deposição da serrapilheira bem como estudar a composição química das folhas originadas desta serrapilheira depositada no campus do Instituto de Pesquisas Energéticas e Nucleares, IPEN, São Paulo, (RMSP) visando seu emprego como indicador do estagio de conservação ou degradação das áreas estudadas. Foram instalados 10 coletores de serrapilheira, com as dimensões de 1m x 1m, profundidade de 45 cm e 2 mm de malha, dispostos a 20 cm do solo sob a copa das árvores. Para determinação da produção de serrapilheira foram recolhidas deposições mensais nos coletores entre os meses: Fevereiro/2010 à Janeiro/2011. A determinação dos elementos químicos foi realizada utilizando as técnicas de fluorescência de raios-X por dispersão de comprimento de onda (WDXRF) e espectrometria de emissão ótica com fonte de plasma de argônio induzido (ICP-OES). Para a análise estatística dos dados foi aplicada a análise de componentes principais. A heterogeneidade temporal observada foi conseqüência da sazonalidade...

NUTRIENT CYCLING IN 2 SOUTH-EAST BRAZILIAN FORESTS .1. LITTERFALL AND LITTER STANDING CROP

Morellato, LPC
Fonte: Cambridge University Press Publicador: Cambridge University Press
Tipo: Artigo de Revista Científica Formato: 205-215
ENG
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Litterfall (leaves, woody < 5 cm diameter, flowers and fruits) was estimated monthly using 20 litter traps, each 1 m2 , and litter standing crops were collected every three months using 20 samples of 0.5 m2, for Altitudinal forest (AF) and Semideciduous forest (SF) in south-east Brazil (Serra do Japi, Jundiai, São Paulo State) from March 1985 to March 1986. The total litterfall was 7 t ha-1 y-1 for AF:4.9 leaves, 1.8 woody, 0.13 flower, 0.16 fruits; and the total for SF was 8.6 t ha-1 y-1: 5.5 leaves, 2.1 woody, 0.5 flower, 0.4 fruits. Litter standing crop was 5.5 t ha-1 y-1 for the two forest sites studied with a turnover coefficient (K1) of 1.3 for AF and 1.6 for SF. Litterfall occurred throughout the year but was greater during the dry season (August-September); seasonality of litter and leaf fall was greater in SF than in AF but in both followed the litterfall patterns of other south-east Brazilian forests.

Nutrient cycling in two south-east Brazilian forests. I. Litterfall and litter standing crop

Morellato, L. P C
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 205-215
ENG
Relevância na Pesquisa
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Examined litterfall and litter standing crops in Altitudinal forest (AF and Semideciduous forest (SF) at Serra do Japi, Jundiai, Sao Paulo State. Total litterfall was 7 t ha-1 y-1 for AF: 4.9 leaves, 1.8 woody, 0.13 flower, 0.16 fruits; and the total for SF was 8.6 t ha-1 y-1; 5.5 leaves, 2.1 woody, 0.5 flower, 0.4 fruits. Litter standing crop was 5.5 t ha-1 y-1 for the two forest sites studied with a turnover coefficient (K1) of 1.3 for AF and 1.6 for SF. Litterfall occurred throughout the year but was greater during the dry season (August-September); seasonality of litter and leaf fall was greater in SF than in AF. -from Author

Análise espacial da produtividade e acúmulo de serapilheira em mata de galeria; Spatial analysis of litterfall and litter accumulation in a gallery-forest in central Brazil

Aquino, Priscila Sales Rodrigues
Fonte: Universidade de Brasília Publicador: Universidade de Brasília
Tipo: Dissertação
POR
Relevância na Pesquisa
298.87467%
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Florestal, 2013.; Serapilheira é a camada, de resíduos orgânicos, formada sobre os solos de ecossistemas florestais e é um componente fundamental desses ambientes, especialmente pela forte relação com os processos de ciclagem de nutrientes. Contudo, fenômenos naturais, como a deposição de serapilheira, comumente apresentam-se com certa estruturação nas variações entre vizinhos, inferindo que as variações não são aleatórias. Portanto, o estudo objetivou avaliar a eficência de métodos geoestatísticos na estimação da produtividade e acúmulo de serapilheira em mata de galeria. O estudo foi conduzido na mata de galeria do córrego Lava-pés em Ipameri, GO. Avaliou-se a produtividade de serapilheira utilizando-se 60 coletores, instalados em uma malha regular georreferenciada de 32 x 32 m. Para avaliação da serapilheira acumulada no solo utilizou-se moldura circular de mangueira de 0,65 m de diâmetro colocada ao lado de cada coletor. Os coletores foram confeccionados com moldura circular de mangueira, tela de nylon de 2 mm de abertura de malha e com 0...

Litterfall production in intact and selectively logged forests in southern of Amazonia as a function of basal area of vegetation and plant density

ALMEIDA,Everton José; LUIZÃO,Flávio; RODRIGUES,Domingos de Jesus
Fonte: Instituto Nacional de Pesquisas da Amazônia Publicador: Instituto Nacional de Pesquisas da Amazônia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2015 EN
Relevância na Pesquisa
292.85621%
Nutrient recycling in the forest is linked to the production and decomposition of litter, which are essential processes for forest maintenance, especially in regions of nutritionally poor soils. Human interventions in forest such as selecttive logging may have strong impacts on these processes. The objectives of this study were to estimate litterfall production and evaluate the influence of environmental factors (basal area of vegetation, plant density, canopy cover, and soil physicochemical properties) and anthropogenic factors (post-management age and exploited basal area) on this production, in areas of intact and exploited forest in southern Amazonia, located in the northern parts of Mato Grosso state. This study was conducted at five locations and the average annual production of litterfall was 10.6 Mg ha-1 year-1, higher than the values for the Amazon rainforest. There were differences in litterfall productions between study locations. Effects of historical logging intensity on litterfall production were not significant. Effects of basal area of vegetation and tree density on litterfall production were observed, highlighting the importance of local vegetation characteristics in litterfall production. This study demonstrated areas of transition between the Amazonia-Cerrado tend to have a higher litterfall production than Cerrado and Amazonia regions...

Litterfall and litter nutrient content in two Brazilian Tropical Forests

MORAES,REGINA MARIA DE; DELITTI,WELINGTON BRAZ CARVALHO; STRUFFALDI-DE VUONO,YARA
Fonte: Sociedade Botânica de São Paulo Publicador: Sociedade Botânica de São Paulo
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/1999 EN
Relevância na Pesquisa
382.14203%
Litterfall and transfer of nutrients was estimated in two tropical coastal forests of Brazil - the Atlantic and the Restinga Forests at Cardoso Island, São Paulo. Samples were collected monthly, from June 1990 to May 1991, using thirty 0.25 m2 traps. There were significant differences in litter production between the Atlantic Forest (6.3 t.ha-1.year-1) and the Restinga Forest (3.9 t.ha-1.year-1). Litterfall was continuous throughout the year with maximum in the beginning of the rainy season in both sites. The annual return of mineral elements through litter in the Atlantic Forest was (kg.ha-1): 101.8 N, 3.8 P, 20.3 K, 60.0 Ca, 18.0 Mg, and 14.6 S and in the Restinga Forest was: 27.5 N, 1.0 P, 6.5 K, 30.0 Ca, 10.9 Mg, and 6.6 S. The return, although small, is relevant due to the low fertility of the soils in those ecosystems, especially in Restinga. The Restinga Forest seems to be an ecosystem well adapted to oligotrophic conditions, lying among those presenting higher nutrient use efficiency.

Phenology, litterfall, growth, and root biomass in a tidal floodplain forest in the Amazon estuary

Cattanio,José H.; Anderson,Anthony B.; Rombold,John S.; Nepstad,Daniel C.
Fonte: Sociedade Botânica de São Paulo Publicador: Sociedade Botânica de São Paulo
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2004 EN
Relevância na Pesquisa
386.11664%
The dynamics of forests subject to inundation appears to be strongly influenced by the frequency and intensity of natural disturbances such as flooding. In a late successional tidal floodplain forest near the Amazon port of Belém, Brazil, we tested this prediction by measuring seasonal patterns of phenology and litterfall in relation to two key variables: rainfall and tide levels. In addition, we estimated the root biomass and the annual growth of the forest community by measuring stem increments over time. Our results showed high correlations between phenological events (flowering and fruiting) and rainfall and tide levels, while correlations between litterfall and these variations were generally weaker. Contrary to our prediction, root biomass to 1 m depth showed no significant differences along the topographic gradient, and the root biomass at all topographic levels was low to intermediate compared with other neotropical forests. Both litterfall and total stem increment were high compared to other tropical forest, indicating the high productivity of this ecosystem.

Effects of the Interception of Litterfall by the Understory on Carbon Cycling in Eucalyptus Plantations of South China

Yang, Long; Wang, Jun; Huang, Yuhui; Hui, Dafeng; Wen, Meili
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 24/06/2014 EN
Relevância na Pesquisa
292.85621%
For the purposes of forest restoration, carbon (C) fixation, and economic improvement, eucalyptus (Eucalyptus urophylla) has been widely planted in South China. The understory of eucalyptus plantations is often occupied by a dense community of the fern Dicranopteris dichotoma, which intercepts tree canopy leaf litter before it reaches the ground. To understand the effects of this interception of litterfall on C cycling in eucalyptus plantations, we quantified the mass of intercepted litter and the influences of litterfall interception on litter decomposition and soil respiration. The total mass of E. urophylla litterfall collected on the understory was similar to that collected by the traditional litter trap method. All of the eucalyptus litterfall is intercepted by the D. dichotoma canopy. Of the litterfall that was intercepted by D. dichotoma, 20–40% and 60–80% was intercepted by the top (50–100 cm) and bottom (0–50 cm) of the understory canopy, respectively. Intercepted litterfall decomposed faster at the bottom of understory canopy (at the base of the plants) than at the top, and decomposition was slower on the soil surface in the absence of understory than on any location in the understory canopy. Soil respiration was highest when both the understory and litter were present and was lowest when both the understory and litter were absent. These results indicate that litterfall interception changed carbon flow between aboveground and belowground through litter decomposition and soil respiration...

Produção de serapilheira em floresta de galeria e floresta mesofítica na dolina da garapa, Distrito Federal, Brasil; Litterfall production in gallery and mesophytic forest, in garapa doline, Federal District, Brazil

Fonte: UFLA - Universidade Federal de Lavras Publicador: UFLA - Universidade Federal de Lavras
Tipo: Artigo de Revista Científica Formato: text/html
PT
Relevância na Pesquisa
296.28123%
The accumulated litterfall on the soil of forests has an important role in the dynamics of these ecosystems, because the high portion of energy flowing in the system is concentrated in this compartment. The objective this work was to quantify and analyze the litterfall got understory of the Gallery and Mesophytic Forests present in the Dolina da Garapa, and to relate this data with meteorological and ecophysiological data, with aim to check different significance between these two forest environments and between the months of study. From January 2006 to December 2007 were established 50 litterfall trap in each forest environment, where was collected, weighted and classified the litterfall in leaves, stem and trunk, flowers and fruits and seed. The mean values sampled of litterfall production in total mass, leaf, flowers, stem and trunk, fruit and seeds were significatively different in two studied environments. In the correlation carried out between the meteorological and ecophysiological variables and the registered value of litterfall was observed that just the temperature variable had not significance in the coefficient of correlation ( < 0.5) to litterfall yield. The total production of litterfall during the studied period showed that the Mesophytic Forest is most vulnerable to external meteorological factors and ecophysiological factors of their species...

Seasonality of litterfall and leaf decomposition in a cerrado site

Valenti,MW.; Cianciaruso,MV.; Batalha,MA.
Fonte: Instituto Internacional de Ecologia Publicador: Instituto Internacional de Ecologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2008 EN
Relevância na Pesquisa
382.14203%
We investigated annual litterfall and leaf decomposition rate in a cerrado site. We collected woody plant litter monthly from April 2001 to March 2002 and from July 2003 to June 2004. We placed systematically 13 litter traps (0.5 x 0.5 m) in a line, 10 m one from the other. We sorted litter into 'leaves', 'stems', 'reproductive structures', and 'miscellanea' fractions, oven-dried them at 80 °C until constant mass and weighed the dry material. To assess leaf decomposition rate, we packed leaves recently shed by plants in litter bags. We placed seven sets of nine litter bags in a line, 10 m one from the other, on the soil surface and collected nine bags each time after 1, 2, 3, 4, 6, 9, and 12 months. Total and leaf litter productions showed a seasonal pattern. Leaf litterfall was the phenological attribute that showed the strongest response to seasonality and drought. Decomposition was slower in the cerrado that we studied compared to a more closed cerrado physiognomy, reflecting their structural and environmental differences. Thus, decomposition rates seem to increase from open to closed cerrado physiognomies, probably related to an increase of humidity and nutrients in the soil.

Contrasting impacts of continuous moderate drought and episodic severe droughts on the aboveground-biomass increment and litterfall of three coexisting Mediterranean woody species

Liu, Daijun; Ogaya Inurrigarro, Romà; Barbeta i Margarit, Adrià; Yang, Xiaohong; Peñuelas, Josep
Fonte: Universidade Autônoma de Barcelona Publicador: Universidade Autônoma de Barcelona
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/acceptedVersion
Publicado em //2015 ENG
Relevância na Pesquisa
386.11664%
Climate change is predicted to increase the aridity in the Mediterranean Basin and severely affect forest productivity and composition. The responses of forests to different timescales of drought, however, are still poorly understood because extreme and persistent moderate droughts can produce nonlinear responses in plants. We conducted a rainfall-manipulation experiment in a Mediterranean forest dominated by Quercus ilex, Phillyrea latifolia, and Arbutus unedo in the Prades Mountains in southern Catalonia from 1999 to 2014. The experimental drought significantly decreased forest aboveground-biomass increment (ABI), tended to increase the litterfall, and decreased aboveground net primary production throughout the 15 years of the study. The responses to the experimental drought were highly species-specific. A. unedo suffered a significant reduction in ABI, Q. ilex experienced a decrease during the early experiment (1999-2003) and in the extreme droughts of 2005-2006 and 2011-2012, and P. latifolia was unaffected by the treatment. The drought treatment significantly increased branch litterfall, especially in the extremely dry year of 2011, and also increased overall leaf litterfall. The drought treatment reduced the fruit production of Q. ilex...

Produção de serapilheira das lianas de um remanescente de Mata Atlântica na microbacia do rio Novo, Orleans, Santa Catarina; .

Martinello, Clair Maria; Instituto de Pesquisas Ambientais e Tecnológicas - IPAT; Citadini-Zanette, Vanilde; Herbário Pe. Dr. Raulino Reitz. Instituto de Pesquisas Ambientais e Tecnológicas - IPAT; Santos, Robson dos; Herbário Pe. Dr. Raulino Reitz. I
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 01/01/1999 POR
Relevância na Pesquisa
294.22176%
A produção de serapilheira foliar de dianas foi estimada em um remanescente de Mata Atlântica de Encosta (Floresta Ombrófila Densa Submontanta) na microbacia do rio Novo, Orleans, SC (28º21'S e 49º17'W, altitude 285m). Com base na coleta de serapilheira realizada no ano de 1993, que estimou sua produção em 1 hectare do remanescente, separou-se da fração foliar da serapilheira produzida, àquelas pertencentes às 16 espécies de lianas presentes na área de estudo, confirmadas por comparação com os exemplares depositados no Herbário Padre Dr. Raulino Reitz, obtendo-se para as lianas a produção de serapilheira foliar total e por espécie. A produção anual de serapilheira foliar de lianas do remanescente florestal foi de 1471 kg/ha, o que representa 17% da serapilheira produzida e 25% da fração foliar. A espécie de maior produção de serapilheira foliar foi Bauhinia angulosa Vog. (Caesalpiniaceae) com 1432 kg/ha/ano, o que representa 97% da população de serapilheira foliar das lianas do remanescente. Das 16 espécies encontradas na área do levantamento fitossociológico do remanescente floresta, 8 não foram detectadas nos coletores de serapilheira, por estarem fora da área de alcance destes coletores ou devido a baixa densidade...

Nutrient fluxes in litterfall of a secondary successional alluvial rain forest in Southern Brazil

Bergamini Scheer,Maurício; Gatti,Gustavo; Wisniewski,Celina
Fonte: Revista de Biología Tropical Publicador: Revista de Biología Tropical
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2011 EN
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During forest succession, litterfall nutrient fluxes increase significantly. The higher inputs of organic matter and nutrients through litterfall affects positively soil fertility and the species composition, which are essential components in forest restoration and management programs. In the present study, the input of nutrients to the forest soil via litterfall components was estimated for two sites of different development stages, in an early successional alluvial rain forest in Brazil. Litterfall returned to the soil, in kg/ha, ca. 93 N, 79 Ca, 24 K, 15 Mg, 6 P, 1.7 Mn, 0.94 Fe, 0.18 Zn, 0.09 Cu and 11.2 Al, in the site where trees were more abundant and had higher values of basal area. In the other area, where trees where less abundant and values of basal area were comparatively low, litterfall returned <50% of those amounts to the forest soil, except for Al. The amount of Al that returned to the soil was similar in both areas due to the high contribution of Tibouchina pulchra (82% of Al returned). Comparatively, high proportion of three dominant native tree species (Myrsine coriacea, T. pulchra and Cecropia pachystachya) explained better litter nutrient use efficiency (mainly N and P) in the site with the least advanced successional stage. Although litterfall of these species show lower nutrient concentrations than the other tree species...

Biomass,litterfall and decomposition rates for the fringed Rhizophora mangle forest lining the Bon Accord Lagoon,Tobago

Juman,Rahanna A
Fonte: Revista de Biología Tropical Publicador: Revista de Biología Tropical
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/05/2005 EN
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The mangrove forest that fringes the Bon Accord Lagoon measures 0.8 km² and is dominated by red mangrove (Rhizophora mangle ).This forest forms the landward boundary of the Buccoo Reef Marine Park in Southwest Tobago,and is part of a mangrove-seagrass-coral reef continuum.Biomass and productivity,as indicated by litterfall rates,were measured in seven 0.01 ha monospecific plots from February 1998 to February 1999,and decomposition rates were determined. Red mangrove above-ground biomass ranged between 2.0 and 25.9 kg (dry wt.)m-2 .Mean biomass was 14.1 ±8.1 kg (dry wt.)m-2 yielding a standing crop of 11 318 ±6 488 t. Litterfall rate varied spatially and seasonally.It peaked from May to August (4.2-4.3 g dry wt.m-2 d-1 )and was lowest from October to December (2.3-2.8 g dry wt.m-2 d-1 ).Mean annual litterfall rate was 3.4 ±0.9 g dry wt.m-2 d-1 .Leaf degradation rates ranged from 0.3%loss d-1 in the upper intertidal zone to 1%loss d-1 at a lower intertidal site flooded by sewage effluent.Mean degradation rate was 0.4 ±1%loss d-1 .The swamp produces 2.8 t dry wt.of litterfall and 12 kg dry wt.of decomposed leaf material daily.Biomass and litterfall rates in Bon Accord Lagoon were compared to five similar sites that also participate in the Caribbean Coastal Marine Productivity Programme (CARICOMP).The Bon Accord Lagoon mangrove swamp is a highly productive fringed-forest that contributes to the overall productivity of the mangrove-seagrass-reef complex.

Litterfall in Pinus greggii Engelm: And Pinus cembroides Zucc. plantations, in Coahuila, México

Gutiérrez Vázquez,Mario H.; Méndez González,Jorge; Flores López,Celestino; Ramírez Díaz,José A.; Gutiérrez Vázquez,Benito N.
Fonte: Sociedad Mexicana de Fitogenética A.C. Publicador: Sociedad Mexicana de Fitogenética A.C.
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2012 EN
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This research was carried out to evaluate litterfall kinetics in two coniferous plantations (Pinus greggii Engelm. and P. cembroides Zucc.) planted in 1992, growing under similar environmental conditions in the Sierra de Arteaga, Coahuila, México. Litterfall was collected at both sites from 15 randomly distributed litter traps, over monthly time intervals along one year (February 2009 - February 2010). Traps of 1 m² were made from wooden a frame and metallic mesh of 1 mm x 1 mm. Kruskal-Wallis (95 %) non-parametric test was used to detect significant differences of litterfall components (needles, branches and male cones) among species and sampling dates. Principal component analysis and Stepwise regression were employed to evaluate relationships of litterfall and climatic factors. Litterfall was higher (P < 0.05) in P. greggii (2.98 ± 5.18 g m-2 month¹) than in P. cembroides (2.71 ± 6.01 g m-2 month-1), equivalent to 1072 and 976 kg ha-1 year-1, respectively. Needle litter comprised about 92.3 ± 8.1 % of total litterfall for Pinus gregii and 94.3 ± 3.8 % for P. cembroides. The results show that litterfall inputs be affected by tree species and by environmental factors, mainly wind and temperature.