Nutrient efficiency and resorption in Quercus pyrenaica oak coppices under different rainfall regimes of the Sierra de Gata mountains (central western Spain)

Gallardo, Juan F.; Martin, A.; Moreno, Gerardo

doi:10.1051/forest:19990406

Cited by 17 publications

(14 citation statements)

References 23 publications

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“…It is noticeable that the decrease pattern of P concentration in CL leaf litter is not so clear, which may be in relation with the higher P concentration in mature leaves and leaf litter of CL. Ca concentration in CS leaves increases along leaf life span, due to the low mobility of this bio-element, leading to a maximum concentration at senescence, during the dry season (Simões et al 2008), as observed for tree species in Mediterranean areas Gallardo et al 1999;Santa Regina 2000).…”

Section: Annual Potential Return Of Bio-elementsmentioning

confidence: 89%

Ability of Cistus L. shrubs to promote soil rehabilitation in extensive oak woodlands of Mediterranean areas

Simões

Madeira²,

Gazarini

2009

Plant Soil

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To assess the ecological function of Cistus salviifolius (CS) and C. ladanifer (CL) shrubs in evergreen oak woodlands, a study was conducted over a 4-year period in southern Portugal. Annual potential return of bio-elements to the soil through litterfall and throughfall, and necromass on soil surface under shrub canopies were assessed along with the dynamics of leaf litter decomposition. Soil bulk density and soil-water retention at different soil matric potential were measured at 0-5 and 5-10 cm depth, and soil chemical properties were determined at 0-5, 5-10, 10-20 and 20-30 cm depth beneath canopies and at barren spaces. Litterfall was higher for CL (4.4-4.6 Mg DM ha−1 year−1) than for CS (3.3-3.8 Mg DM ha−1 year−1). Annual amount of N returned to the soil through litterfall of CS (22.9 kg N ha−1 year−1) was higher than by that of CL (17.2 kg N ha−1 year−1), whereas the return of P in CL (4.1 kg P ha−1 year−1) was higher than in CS (2.1 kg P ha−1 year−1). Leaf decomposition was faster for CS (k= −0.87) than for CL (k=−0.44). N release was also faster for CS than for CL, while that of P was much faster for CL than for CS. Throughfall proportions were 61% of bulk rainfall for CS and 79% for CL. Annual return of Cl−, K+, Ca2+ and Mg2+ by throughfall was more pronounced for CL than for CS. Shrubs improved soil quality, especially in the 0-5 cm top soil layer, by enhancement of organic matter and nutrient content beneath shrub canopies. Therefore, shrubs may promote the invasion of more demanding species, since local areas of high fertility are likely to be favoured sites for vegetation regeneration.

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Section: Annual Potential Return Of Bio-elementsmentioning

confidence: 89%

Ability of Cistus L. shrubs to promote soil rehabilitation in extensive oak woodlands of Mediterranean areas

Simões

Madeira²,

Gazarini

2009

Plant Soil

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“…En contraposición, el espinal tuvo valores de calcio en hojas maduras que oscilaron entre 11,8 y 26,2 mg g -1 (siendo máximos en A. caven y C. tala), siendo en hojas senescentes del mismo orden (11,3 y 25,1 mg g -1 ). Las concentraciones de magnesio registradas por León Peláez et al (2009) en hojas maduras se ubicaron en el límite inferior del intervalo definido para un amplio núme-ro de bosques tropicales de tierras altas (1,2-3,0 mg g -1 ), mientras que en hojas senescentes bajó a 0,6-1,0 mg g -1 , debido a pérdidas por lixiviación (Gallardo et al 1999); valores similares se han encontrado en el espinal. Consecuentemente, la razón calcio:magnesio en hojas maduras y en hojas senescentes resultaron más altas en el espinal que en bosques tropicales, sugiriendo un desequilibrio en la relación calcio:magnesio, con mayor absorción del calcio en detrimento del magnesio.…”

Section: Discussionunclassified

“…Los bajos valores de la retranslocación para nitróge-no, evidenciados en Rc 1 y Rc 2 , en las especies de fabáceas (cuadros 4 y 5) denotan la escasa resorción del nitrógeno. Una elevada concentración de nitrógeno en hojas senescentes supone una baja retranslocación e, indirectamente, un mayor aporte de nitrógeno al suelo con el desfronde (Martín et al 1996, Gallardo et al 1999. La menor retranslocación del nitrógeno en especies de fabáceas respecto a lo observado en celtidáceas, está indicando una gran potencialidad de fijar nitrógeno por parte de las primeras, lo cual denota efectivamente la fijación biológica por parte de bacterias simbiontes, e indirectamente implica un mayor retorno de nitrógeno al suelo, siendo esto último de gran valor en los bosques nativos del Espinal Mesopotámico cuyo uso es fundamentalmente silvopastoril (Casermeiro et al 2001).…”

Section: Discussionunclassified

Retranslocación de nutrientes en especies dominantes de bosques del Espinal Mesopotámico (Argentina)

Mendoza¹,

Turrión²,

Aceñolaza

et al. 2014

Bosque (Valdivia)

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SUMMARYThe resorption of nutrients of dominant species in a successional sequence of forests of the Argentinean Mesopotamian Espinal was studied for two years (2009)(2010). The aim was to compare nutrient resorption (nitrogen, phosphorus, potassium, calcium, magnesium and sulphur) among species of the Fabaceae (Acacia caven, Prosopis affinis and Prosopis nigra with the capacity of biologically fixing the atmospheric nitrogen) and Celtidacea families (Celtis tala, without the capacity of biologically fixing the atmospheric nitrogen). Samples of mature leaves (collected in spring) and senescent leaves (collected in autumn) were chemically analyzed to determine nutrient concentration; afterwards, resorption rates were calculated (Rc 1 and Rc 2 ). It was found that the higher nitrogen resorption was associated with the inability of biologically fixing the atmospheric nitrogen, having both indexes a maximum nitrogen resorption in C. tala and a minimum in A. caven. On the contrary, the other elements (P, K, Ca, Mg and S) showed resorption differences in one of the indexes used, indicating a higher resorption in Fabaceae in contrast with Celtidaceae, associated with a higher foliar demand of these elements.Key words: Fabaceae, Celtidacea, resorption. RESUMENSe estudió durante dos años (2009 y 2010) la retranslocación de nutrientes en especies dominantes de bosques correspondientes a una secuencia sucesional del Espinal Mesopotámico. El objetivo fue comparar la retranslocación de nutrientes (nitrógeno, fósforo, potasio, calcio, magnesio y azufre) entre especies de familias fabáceas (Acacia caven, Prosopis affinis y Prosopis nigra; con capacidad de fijar biológicamente el nitrógeno atmosférico) y celtidáceas (Celtis tala, sin capacidad de fijar biológicamente el nitrógeno atmosférico). Se analizaron químicamente las muestras de hojas maduras (recolectadas en primavera) y senescentes (recolectadas en otoño) para determinar la concentración de nutrientes y luego se calcularon los índices de retranslocación (Rc 1 y Rc 2 ). Se determinó que la mayor retranslocación del nitrógeno estuvo asociada la imposibilidad de fijar biológicamente el nitrógeno atmosférico, observándose que ambos índices denotaron una máxima retranslocación de nitrógeno en C. tala y mínima en A. caven. Contrariamente, los demás elementos (P, K, Ca, Mg y S) mostraron diferencias en la retranslocación en uno de los índices utilizados, indicando mayor resorción en fabáceas respecto a celtidácea, asociado a una mayor demanda foliar de estos elementos.Palabras clave: fabáceas, celtidáceas, resorción. INTRODUCCIÓNLa retranslocación o resorción es un proceso fisiológi-co referido a la utilización repetida de las mismas unidades de algún nutriente por parte del árbol; se realiza con la finalidad de maximizar su uso cuando estos son escasos en el suelo (Del Arco et al. 1991) evitando así su pérdida (Vitousek 1982). Se considera a la retranslocación como un mecanismo eficaz para la conservación de nutrientes por aparte del árbol y es característico en un gran númer...

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“…47 kg N ha -1 (about 56% of the total N) in a stand of Quercus serrata (Migita et al, 2007) or 7-27 kg N ha -1 , 0.5-1.8 kg P ha -1 , and 1.8-5.3 kg K ha -1 in several coppices of Q. pyrenaica (Gallardo et al, 1999). Changes in the flux of resorbed nutrients are accompanied by symmetrical changes in the flux of nutrients returned to the soil with the fallen leaves.…”

Section: Significance Of Nutrient Resorption For Winter Deciduous Plamentioning

confidence: 99%

Alteration of the phenology of leaf senescence and fall in winter deciduous species by climate change: effects on nutrient proficiency

Estiarte

Peñuelas

2015

Global Change Biology

338

287

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Leaf senescence in winter deciduous species signals the transition from the active to the dormant stage.The purpose of leaf senescence is the recovery of nutrients before the leaves fall. Photoperiod and temperature are the main cues controlling leaf senescence in winter deciduous species, with water stress imposing an additional influence. Photoperiod exerts a strict control on leaf senescence at latitudes where winters are severe and temperature gains importance in the regulation as winters become less severe. On average, climatic warming will delay and drought will advance leaf senescence, but at varying degrees depending on the species. Warming and drought thus have opposite effects on the phenology of leaf senescence, and the impact of climate change will therefore depend on the relative importance of each factor in specific regions. Warming is not expected to have a strong impact on nutrient proficiency although a slower speed of leaf senescence induced by warming could facilitate a more efficient nutrient resorption. Nutrient resorption is less efficient when the leaves senesce prematurely as a consequence of water stress. The overall effects of climate change on nutrient resorption will depend on the contrasting effects of warming and drought. Changes in nutrient resorption and proficiency will impact production in the following year, at least in early spring, because the construction of new foliage relies almost exclusively on nutrients resorbed from foliage during the preceding leaf fall. Changes in the phenology of leaf senescence will thus impact carbon uptake, but also ecosystem nutrient cycling, especially if the changes are consequence of water stress. Page 1 of 35 Global Change BiologyThis is the accepted version of the following article: "Alteration of the phenology of leaf senescence and fall in winter deciduous species by climate change: effects on nutrient proficiency / M. Estiarte et al., in Global change biology (Wiley), 2015, which has been published in final form at

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Nutrient efficiency and resorption in Quercus pyrenaica oak coppices under different rainfall regimes of the Sierra de Gata mountains (central western Spain)

Cited by 17 publications

References 23 publications

Ability of Cistus L. shrubs to promote soil rehabilitation in extensive oak woodlands of Mediterranean areas

Ability of Cistus L. shrubs to promote soil rehabilitation in extensive oak woodlands of Mediterranean areas

Retranslocación de nutrientes en especies dominantes de bosques del Espinal Mesopotámico (Argentina)

Alteration of the phenology of leaf senescence and fall in winter deciduous species by climate change: effects on nutrient proficiency

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