Leaffall Phenology in a Subtropical Wet Forest in Puerto Rico: From Species to Community Patterns

Zalamea, Marcela; González, Grizelle

doi:10.1111/j.1744-7429.2007.00389.x

Cited by 76 publications

(69 citation statements)

References 44 publications

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“…3). Some authors have further suggested that high values of irradiance could drive the leaf production cycle, as observed in seasonal and aseasonal forests (Zalamea and Gonzalez, 2008;Myneni et al, 2007;Hutyra et al, 2007). (iii) At La Selva (Clark et al, 2010), annual growth was found to be sensitive to variations of 1-2 • C in mean annual night-time temperature.…”

Section: Wood Productionmentioning

confidence: 99%

“…Seasonality of leaf phenology in tropical rainforests has been observed either from (i) field measurements of litterfall and leaf production Zalamea and Gonzalez, 2008;Bonal et al, 2008;Sabatier and Puig, 1986) or (ii) satellite data (Huete et al, 2006;Asner et al, 2000Asner et al, , 2004Caldararu et al, 2012;Pennec et al, 2011). The latter studies characterize leaf phenology through variations in different vegetation indices, i.e.…”

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confidence: 99%

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Asynchronism in leaf and wood production in tropical forests: a study combining satellite and ground-based measurements

Wagner

Rossi²,

Stahl

et al. 2013

Biogeosciences

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Abstract. The fixation of carbon in tropical forests mainly occurs through the production of wood and leaves, both being the principal components of net primary production. Currently field and satellite observations are independently used to describe the forest carbon cycle, but the link between satellite-derived forest phenology and field-derived forest productivity remains opaque. We used a unique combination of a MODIS enhanced vegetation index (EVI) dataset, a wood production model based on climate data and direct litterfall observations at an intra-annual timescale in order to question the synchronism of leaf and wood production in tropical forests. Even though leaf and wood biomass fluxes had the same range (respectively 2.4 ± 1.4 and 2.2 ± 0.4 Mg C ha −1 yr −1 ), they occurred separately in time. EVI increased with leaf renewal at the beginning of the dry season, when solar irradiance was at its maximum. At this time, wood production stopped. At the onset of the rainy season, when new leaves were fully mature and water available again, wood production quickly increased to reach its maximum in less than a month, reflecting a change in carbon allocation from short-lived pools (leaves) to long-lived pools (wood). The time lag between peaks of EVI and wood production (109 days) revealed a substantial decoupling between the leaf renewal assumed to be driven by irradiance and the water-driven wood production. Our work is a first attempt to link EVI data, wood production and leaf phenology at a seasonal timescale in a tropical evergreen rainforest and pave the way to develop more sophisticated global carbon cycle models in tropical forests.

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Section: Wood Productionmentioning

confidence: 99%

mentioning

confidence: 99%

Asynchronism in leaf and wood production in tropical forests: a study combining satellite and ground-based measurements

Wagner

Rossi²,

Stahl

et al. 2013

Biogeosciences

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“…Although this is a non-seasonal forest, there is typically a weak dry season from December to March [14]. Two litterfall peaks normally occur in April and August, and the lowest litterfall rate is between December and February [23,33,34]. Soils are classified as highly weathered Oxisols derived from volcaniclastic sediments [35,36].…”

Section: Study Sitesmentioning

confidence: 99%

Responses of Soil Labile Organic Carbon to a Simulated Hurricane Disturbance in a Tropical Wet Forest

Liu

XiuCheng

Zou

et al. 2018

Forests

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Abstract:Hurricanes are an important disturbance in the tropics that can alter forest ecosystem properties and processes. To understand the immediate influence of hurricane disturbance on carbon cycling, we examined soil labile organic carbon (LOC) in a Canopy Trimming Experiment (CTE) located in the Luquillo Experimental Forest of Puerto Rico. We trimmed tree canopy and deposited debris (CTDD) on the forest ground of the treatment plots in December 2014, and collected floor mass samples and 0-10 cm soil samples three weeks before the treatment, as well as at scheduled intervals for 120 weeks after the treatment. Within the first week following the CTDD treatment, the mean soil microbial biomass carbon (MBC) and soil LOC in the CTDD plots were significantly greater than in the control plots (soil MBC: 2.56 g/kg versus 1.98 g/kg, soil LOC: 9.16 g/kg versus 6.44 g/kg, respectively), and the mean turnover rates of soil LOC in the CTDD plots were significantly faster than in the control plots. The measured indices fluctuated temporally more in the CTDD plots than in the control plots, especially between the 12th and 84th week after the CTDD treatment. The treatment effect on soil LOC and its turnover rate gradually disappeared after the 84th week following the treatment, while higher levels of soil MBC in the CTDD plots than in the control plots remained high, even at the 120th week. Our data suggest that hurricane disturbance can accelerate the cycling of soil LOC on a short temporal scale of less than two years, but might have a longer lasting effect on soil MBC in a tropical wet forest.

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“…Portanto, entender os padrões de produção da serapilheira é fundamental para a compreensão da dinâmica e do funcionamento dos ecossistemas, bem como para seu monitoramento (VIDAL et al, 2007). Diversos são os fatores que podem influenciar a sua produção, principalmente: clima, estrutura da vegetação, estádio sucessional da floresta, microambientes, perturbações antropogênicas e adaptações ecofisiológicas (ZALAMEA & GONZALEZ, 2008).…”

Section: Introductionunclassified

Produção de serapilheira em floresta de galeria e floresta mesofítica na dolina da garapa, Distrito Federal, Brasil

Santana

Encinas

Silveira

et al. 2010

CERNE

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RESUMO:A serapilheira acumulada sobre o solo das florestas tem papel importante na dinâmica desses ecossistemas, pois a maior parcela da energia que flui no sistema está concentrada nesse compartimento. Objetivou-se, neste estudo, quantificar e analisar a serapilheira formada abaixo do dossel da Floresta de Galeria e Mesofítica, presentes na Dolina da Garapa-DF, relacionando-a com variáveis meteorológicas e ecofisiológicas, buscando verificar diferenças significativas entre estes dois ambientes florestais e entre os meses de estudo. De janeiro de 2006 a dezembro de 2007, foram dispostos 50 coletores de serapilheira em cada ambiente florestal, em que foi coletada, pesada e classificada a serapilheira em folhas, caule e galhos, flores, frutos e sementes. Os valores médios encontrados de produção de serapilheira em massa total de folhas, flores e caules, galhos, frutos e sementes, foram diferentes significativamente nos dois ambientes estudados. Na correlação entre as variáveis meteorológicas e ecofisiológias e o valor de serapilheira registrado, observou-se, que apenas a variável temperatura não obteve significância do coeficiente de correlação ( < 0,5) para produção de serapilheira. Pela produção total de serapilheira durante o período estudado mostrou-se que a Floresta Mesofítica é a mais vulnerável a fatores externos meteorológicos e a fatores ecofisiológicos de suas espécies, do que a Floresta de Galeria. Primeiro pelo fator espacial, a localização da Floresta de Galeria, em baixa altitude, não está exposta a fatores meteorológicos (por exemplo, radiação solar) como a Floresta Mesofítica, e segundo pela proximidade do curso d´água. Esse fator espacial e a menor influência dos fatores meteorológicos mantiveram a produção de serapilheira total com um menor desvio médio na Floresta de Galeria em uma escala temporal, sendo que a Floresta Mesofítica ficou susceptível a variações sazonais meteorológicas, tendo assim um maior desvio médio da produção de serapilheira, ao longo do período estudado.Palavras-chave: Fenologia, índice de área foliar, abertura de dossel, pluviosidade. LITTERFALL PRODUCTION IN GALLERY AND MESOPHYTIC FOREST, IN GARAPA DOLINE, FEDERAL DISTRICT, BRAZIL ABSTRACT: 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

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Leaffall Phenology in a Subtropical Wet Forest in Puerto Rico: From Species to Community Patterns

Cited by 76 publications

References 44 publications

Asynchronism in leaf and wood production in tropical forests: a study combining satellite and ground-based measurements

Asynchronism in leaf and wood production in tropical forests: a study combining satellite and ground-based measurements

Responses of Soil Labile Organic Carbon to a Simulated Hurricane Disturbance in a Tropical Wet Forest

Produção de serapilheira em floresta de galeria e floresta mesofítica na dolina da garapa, Distrito Federal, Brasil

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