Ecological Studies on a Lowland Evergreen Rain Forest on Maraca Island, Roraima, Brazil. II. Litter and Nutrient Cycling

Scott, D.; Proctor, John; Thompson, Jill

doi:10.2307/2260861

Cited by 118 publications

(83 citation statements)

References 20 publications

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“…The total litterfall recorded over the course of the year at the four study sites on the middle Xingu River were consistent with the estimates obtained for other Amazonian forests, including terra firme habitats, and igapó and várzea swamps (Klinge, 1977;Adis et al, 1979;Silva and Lobo, 1982;Silva, 1984;Worbes, 1986b;Scott et al, 1992). The leaf fraction accounted for more than 50% of the volume of litter, even at the sites (Arroz Cru) where the lowest values were recorded.…”

Section: Discussionsupporting

confidence: 83%

Effect of seasonal flooding cycle on litterfall production in alluvial rainforest on the middle Xingu River (Amazon basin, Brazil)

2015

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The assumption for this study was that litterfall in floodplain environments of the middle Xingu river follows a pattern of seasonal variation. According to this view, litterfall production (total and fractions) was estimated in four alluvial rainforest sites on the middle Xingu River over an annual cycle, and examined the effect of seasonal flooding cycle. The sites included two marginal flooded forests of insular lakes (Ilha Grande and Pimentel) and two flooded forests on the banks of the Xingu itself (Boa Esperança and Arroz Cru). Total litterfall correlated with rainfall and river levels, but whereas the leaf and fruit fractions followed this general pattern, the flower fraction presented an inverse pattern, peaking in the dry season. The litterfall patterns recorded in the present study were consistent with those recorded at other Amazonian sites, and in some other tropical ecosystems.Keywords: alluvial rainforest, fractions of litter production, middle Xingu River.Efeito da variação da inundação sazonal na produção de serrapilheira numa floresta aluvial do médio Rio Xingu (bacia do Amazonas, Brasil) ResumoO pressuposto para este estudo foi que a produção de serrapilheira nos ambientes inundáveis do médio rio Xingu, segue um padrão de variação sazonal. Assim, se quantificou durante um ciclo anual a produção de serapilheira total e de suas frações, e se indagou a correlação entre o regime do nível do rio e a produção de serapilheira. Quatro ambientes de floresta ombrófila aluvial foram estudados: duas florestas inundáveis de lagoas insulares (Ilha Grande e Pimentel) e dois ambientes de floresta marginal no canal principal do rio Xingu (Boa Esperança e Arroz Cru). A produção de serapilheira total nos quatro ambientes mostrou um padrão sincrônico com a variação do nível do rio e com a inundação das áreas marginais. Por sua vez, foi evidente um aumento da produção de frutos durante a inundação local e de forma inversa uma maior produção de flores com o regime de seca. Os padrões registrados para os componentes de serapilheira do médio rio Xingu, confirmam os achados para outros ambientes amazônicos e tropicais.Palavras-chave: floresta ombrófila aluvial, produção de serrapilheira, médio Rio Xingu.

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Section: Discussionsupporting

confidence: 83%

Effect of seasonal flooding cycle on litterfall production in alluvial rainforest on the middle Xingu River (Amazon basin, Brazil)

2015

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“…As much as 8 tons of leaf litter per hectare per year can be introduced to the soil surface of a tropical rainforest. Annual inputs per gram of litter can equate to approximately 14 mg N, 0.5 mg P, 2 mg K, 8 mg Ca, and 2 mg Mg (Ewel 1976; Scott et al 1992). These nutrient additions, estimated to have occurred over a period of approximately 110 years, were associated with 81 μg N g −1 soil, 900 μg P g −1 soil, 8 μg K g −1 soil, 2,400 μg Ca g −1 soil and 365 μg Mg g −1 soil (Scott et al 1992).…”

Section: Decomposition Stages and Gravesoil Ecologymentioning

confidence: 99%

“…Annual inputs per gram of litter can equate to approximately 14 mg N, 0.5 mg P, 2 mg K, 8 mg Ca, and 2 mg Mg (Ewel 1976; Scott et al 1992). These nutrient additions, estimated to have occurred over a period of approximately 110 years, were associated with 81 μg N g −1 soil, 900 μg P g −1 soil, 8 μg K g −1 soil, 2,400 μg Ca g −1 soil and 365 μg Mg g −1 soil (Scott et al 1992). While the effect of cadaver decomposition on soil nutrient status can be similar to, or less than, that observed with plant and fecal breakdown, peak nutrient values associated with cadaver decomposition can occur in much less time than required by fecal or plant materials.…”

Section: Decomposition Stages and Gravesoil Ecologymentioning

confidence: 99%

Cadaver decomposition in terrestrial ecosystems

Carter

Yellowlees

Tibbett

2006

Naturwissenschaften

536

442

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“…Other factors also affecting production are the plant species [4], the age of the forest system [2,32] and species density [3]. [39,40], Scott et al [43], Son and Gower [44]. [27] and Turrión et al [45].…”

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confidence: 99%

Nutrient cycling in deciduous forest ecosystems of the Sierra de Gata mountains: aboveground litter production and potential nutrient return

Gallardo

Martin²,

Regina

1998

Ann. For. Sci.

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-The potential nutrient return in a chestnut coppice (Castanea sativa Miller) over a period of 3 years (1991)(1992)(1993)(1994) has been established and compared with the returns found in four deciduous oak (Quercus pyrenaica Wild.) forests (1990)(1991)(1992)(1993) located in the Sierra de Gata mountains (central Spanish system). A convergence of abscission phenology patterns was observed among the different ecosystems studied, together with a delay in leaf fall at the warmest plot. This similarity is logical since the plots harbour the same deciduous species which are, however, subjected to climatological variations. The chestnut coppice was found to be more productive than the oak forests, the amounts of leaves, branches, flowers and total litterfall being significantly greater. Statistical analysis showed a highly significant correlation between the chestnut coppice and the oak forest aboveground production, ranging between 0.82 and 0.96 for the leaves and between 0.72 and 0.89 for the total litter. In general, the leaf organs of the chestnut trees showed a higher concentration of bioelements than the oaks, with N and Ca predominant in the buds, Ca and Zn in the branches, K in the fruits, and above all Fe and Cu in the other plant remains. In all the forests studied, the potential nutrient supply fluctuated over the years and depended strongly on phenological factors; above all it was found to be governed by the leaves, which contributed most to the return of mineral nutrients to the soil. The most marked potential nutrient return through the oak aerial organs occurred on the plot with the lowest rainfall, particularly with respect to P and Ca. Considering all the forest plots, the general sequence of the amount of bioelements returning with the litterfall to the soil was as follows:with the exception of one oak plot (

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Ecological Studies on a Lowland Evergreen Rain Forest on Maraca Island, Roraima, Brazil. II. Litter and Nutrient Cycling

Cited by 118 publications

References 20 publications

Effect of seasonal flooding cycle on litterfall production in alluvial rainforest on the middle Xingu River (Amazon basin, Brazil)

Effect of seasonal flooding cycle on litterfall production in alluvial rainforest on the middle Xingu River (Amazon basin, Brazil)

Cadaver decomposition in terrestrial ecosystems

Nutrient cycling in deciduous forest ecosystems of the Sierra de Gata mountains: aboveground litter production and potential nutrient return

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