Nutrient cycling in a natural beech forest and adjacent planted pine in northern Spain

Santa‐Regina, Ignacio; Tarazona, T.

doi:10.1093/forestry/74.1.11

Cited by 53 publications

(19 citation statements)

References 64 publications

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“…Algunas excepciones son la relación utilizada por Ortiz (16) para bosques secundarios de Costa Rica, quien lo fija en 45%, monto que se acerca a los valores determinados en este estudio; también Segura (6) con 45% para madera de Quercus sp., y Santa Regina y Tarazona (17), quienes determinan en 45,7±1,1% el contenido de carbono en hojas de la especie Fagus sylvatica.…”

Section: Resultados Y Discusionunclassified

Contenido de carbono en la biomasa aérea de bosques nativos en Chile

2005

Bosque (Valdivia)

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SUMMARYCarbon (C) content in stem, branches, leaves and bark from 16 tree species of the native forest in Chile was determined. The mean contents of organic C by species varied between 34.9% and 48.3% and the single mean was 43,7±0.16%. The total C content was 5,5±0.76% higher than the organic C content. Significant differences between groups of species and tree tissues were found. For all the species the stem's C contents (44,4±0.16%) were slightly higher than those in woody branches, leaves and bark (43,5±0.21%). The highest C content was for Saxegothaea conspicua with 47,8±0.38% and the lowest for Weinmannia trichosperma, 42,6±0.54%. Through analysis of variance, the study didn't show significant differences between deciduous species and evergreen species and forest type as it did for native coniferous and broadleaf.Key words: carbon contents, above-ground biomass, temperate rainforests. RESUMENSe determinó el contenido de carbono (C) en fuste, ramas, hojas y corteza para 16 especies del bosque nativo en Chile. Los contenidos promedio de C orgánico en las especies fluctuaron entre 34,9 y 48,3%, y el promedio simple alcanzó a 43,7±0,16%. Mientras, el C total mostró ser en promedio 5,5±0,76% mayor que el contenido de C orgánico. Se encontraron diferencias significativas en el contenido de C orgánico entre grupos de especies y entre componentes del árbol. El carbono del fuste (44,4±0,16%), en general, para todas las especies resultó ligeramente mayor que en las ramas, hojas y corteza (43,5±0,21%), siendo mayor la variabilidad en estos últimos. La especie con el mayor contenido de C orgánico en la biomasa del fuste resultó Saxegothaea conspicua (mañío hembra) con 47,8±0,38%. Por su parte, Weinmannia trichosperma (tineo) mostró el menor porcentaje, 42,6±0,54%. Mediante análisis de varianza y método de Bonferroni, el estudio no encontró diferencias significativas en el contenido de C, entre las especies caducifolias y las especies siempre verdes, ni entre el grupo de especies del tipo forestal Siempreverde y del tipo Roble-Raulí-Coigüe. Por el contrario, se encontraron diferencias en el contenido de C entre las coníferas nativas y las especies latifoliadas.Palabras clave: contenido de carbono, biomasa aérea, bosques siempre verdes. INTRODUCCIONEl dióxido de carbono presente en la atmósfe-ra es absorbido por las plantas, a través del proceso de fotosíntesis. Por este medio, las plantas convierten la energía de la luz solar en energía quí-mica aprovechable para los organismos vivos. Así, los bosques almacenan grandes cantidades de carbono (C) en la vegetación y el suelo, e intercambian C con la atmósfera a través de la fotosíntesis y la respiración.

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Section: Resultados Y Discusionunclassified

Contenido de carbono en la biomasa aérea de bosques nativos en Chile

2005

Bosque (Valdivia)

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“…3-A1 and 2-A1; see also Bauer et al, 1997;Millard and Grelet, 2010). The intensive N re-translocation is necessary to conserve N for leaf establishment in spring independently of soil N availability (Santa-Regina and Tarazona, 2001). The N re-translocation efficiency was about 55 % and 76 % for leaves at the canopy base and top of the beech trees, respectively.…”

Section: Differences In Seasonal and Spatial Variation Of Foliar N Comentioning

confidence: 95%

“…The retranslocation of N in Scots pine needles in Finland has been estimated to be around 73 % (Helmisaari, 1992). Across a number of evergreen shrubs and trees, the N re-translocation efficiency was on average reported to be 50 % (Aerts, 1996;Santa-Regina and Tarazona, 2001;see Fig. 5).…”

Section: Differences In Seasonal and Spatial Variation Of Foliar N Comentioning

confidence: 99%

Interactions between leaf nitrogen status and longevity in relation to N cycling in three contrasting European forest canopies

et al. 2013

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Seasonal and spatial variations in foliar nitrogen (N) parameters were investigated in three European forests with different tree species, viz. beech (Fagus sylvatica L.), Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) and Scots pine (Pinus sylvestris L.) growing in Denmark, the Netherlands and Finland, respectively. The objectives were to investigate the distribution of N pools within the canopies of the different forests and to relate this distribution to factors and plant strategies controlling leaf development throughout the seasonal course of a vegetation period. Leaf N pools generally showed much higher seasonal and vertical variability in beech than in the coniferous canopies. However, also the two coniferous tree species behaved very differently with respect to peak summer canopy N content and N retranslocation efficiency, showing that generalisations on tree internal vs. ecosystem internal N cycling cannot be made on the basis of the leaf duration alone. During phases of intensive N turnover in spring and autumn, the NH+ 4 concentration in beech leaves rose considerably, while fully developed green beech leaves had relatively low tissue NH+ 4 , similar to the steadily low levels in Douglas fir and, particularly, in Scots pine. The ratio between bulk foliar concentrations of NH+ 4 and H+, which is an indicator of the NH3 emission potential, reflected differences in foliage N concentration, with beech having the highest values followed by Douglas fir and Scots pine. Irrespectively of the leaf habit, i.e. deciduous versus evergreen, the majority of the canopy foliage N was retained within the trees. This was accomplished through an effective N re-translocation (beech), higher foliage longevity (fir) or both (boreal pine forest). In combination with data from a literature review, a general relationship of decreasing N re-translocation efficiency with the time needed for canopy renewal was deduced, showing that leaves which live longer re-translocate relatively less N during senescence. The Douglas fir stand, exposed to relatively high atmospheric N deposition, had by far the largest peak summer canopy N content and also returned the largest amount of N in foliage litter, suggesting that higher N fertility leads to increased turnover in the ecosystem N cycle with higher risks of losses such as leaching and gas emissions

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“…Physical and chemical properties of litterfall infl uence myriad habitat processes that affect phenotypic plasticity of plant biochemistry (e.g., Loranger et al, 2002;Madritch and Hunter, 2002;Santa Regina and Tarazona, 2001). For example, Allison and Vitousek (2004) report a 50-fold variation in leaf litter decay rates among 11 species, with native species exhibiting much slower decay rates than alien invader species.…”

Section: Cover Storiesmentioning

confidence: 99%

Cycad Toxins and Neurological Diseases in Guam: Defining Theoretical and Experimental Standards for Correlating Human Disease with Environmental Toxins

Marler¹,

Lee²,

Shaw³

2005

HortSci

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Consumption of Cycas micronesica seed tissue has been associated with the amyotrophic lateral sclerosis–parkinsonism dementia complex (ALS–PDC) of the Western Pacific. However, failures to document vital plant and neighborhood descriptors and pronounced variability in toxin concentrations noted within and among studies obfuscate decades of research on this subject. We discuss the theoretical and experimental constraints of plant tissue sampling in relation to human disease research. Comparisons are made between this approach and methods used throughout the history of ALS–PDC research, most notably very recent reports concerning β-methyl-amino-alanine. Methods for studying possible plant neurotoxins need to be standardized and must follow rigorous criteria to be valid in principle. Our discussions reveal why these criteria are essential and highlight the impact that natural variations have on environmental toxin quantification and interpretation. Past research on cycad toxins is deficient on experimental and theoretical grounds, and interpretation of published data is dominated by ambiguities. This area of study as conventionally conceived and carried out needs transforming. We argue that future empirical studies should honor appropriate plant science standards concomitantly with medical science standards. This dual focus will ensure appropriate sampling scheme, sample size, and reporting of background plant and community factors known to influence phenotypic plasticity.

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Nutrient cycling in a natural beech forest and adjacent planted pine in northern Spain

Cited by 53 publications

References 64 publications

Contenido de carbono en la biomasa aérea de bosques nativos en Chile

Contenido de carbono en la biomasa aérea de bosques nativos en Chile

Interactions between leaf nitrogen status and longevity in relation to N cycling in three contrasting European forest canopies

Cycad Toxins and Neurological Diseases in Guam: Defining Theoretical and Experimental Standards for Correlating Human Disease with Environmental Toxins

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