Plant limiting nutrients in Andean-Patagonian woody species: Effects of interannual rainfall variation, soil fertility and mycorrhizal infection

Diehl, Paula; Mazzarino, Marı́a Julia; Fontenla, Sonia

doi:10.1016/j.foreco.2008.02.003

Cited by 64 publications

(76 citation statements)

References 44 publications

(80 reference statements)

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“…This gradient was estimated based on the distance from the Andean continental divide and the longitude (Jobbagy et al 1995). The precipitation gradient originally documented by Barros et al (1983), has been documented for larger areas along the Patagonian Andes but at a lower resolution by Paruelo et al (1998), has proven to influence soil nutrient dynamics in most forests of the region (Diehl et al 2008;Satti et al 2007). The transects used in this study cover the whole range of precipitation documented by the above named studies.…”

Section: Study Areamentioning

confidence: 93%

Plant species richness in a natural Argentinian matorral shrub-land correlates negatively with levels of plant phosphorus

et al. 2010

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The aim of this study was to ascertain whether there is a relationship between plant species richness and plant-available N, P and water in an environment subject to little anthropogenic disturbance. To accomplish this we studied the vegetation in matorral shrub-lands in northern Patagonia, Argentina. Due to the variation in slope, precipitation and aspect between the sites water status was determined using the 12 C/ 13 C fraction, δ 13 C, to investigate whether this was a confounding factor. The numbers of herb, shrub, liana and tree species were determined at 20 sites along an estimated precipitation gradient. Leaf P and N content and the δ 13 C of Berberis buxifolia were determined, as well as the soil P and N content at the different sites. A negative correlation was found between species richness and Berberis buxifolia foliar P concentration (52% of the species richness variation was accounted for), and a positive correlation was found between plant species richness and Berberis buxifolia foliar N: P ratios (54% of the species richness variation was accounted for). The relationship between species richness and foliar P was seen when all layers of vegetation were included (trees, lianas, shrubs and herbs). Foliar N showed no correlation with species richness, while soil extractable NH 4 showed a weak positive correlation with the number of shrub layer species (lianas, shrubs and trees). The species richness of the shrub layer increased with decreasing values of δ 13 C. Low soil P availability thus affects local species richness in the matorral shrub-lands of Patagonia in Argentina although the growth of vegetation in the area has been shown to be limited by N. We suggest that low P levels increase plant species richness because low soil P concentration is associated with a high P partitioning and high potential for niche separation.

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Section: Study Areamentioning

confidence: 93%

Plant species richness in a natural Argentinian matorral shrub-land correlates negatively with levels of plant phosphorus

et al. 2010

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“…Las coníferas, que en nuestra secuencia sucesional están representadas por Araucaria araucana, Austrocedrus chilensis y Prumnopitys andina, presentaron en promedio relaciones foliares de N/P = 10.4, el mismo valor encontrado para las especies deciduas, a pesar que poseen follaje siempreverde. Sin embargo, se han documentado relaciones N/P similares para las coníferas de Nueva Zelanda (Richardson et al 2004) y del bosque templado de Argentina, creciendo sobre sustratos volcánicos (Diehl et al 2008). Esta relación de N/P discordante con la extrema longevidad foliar de las coníferas se podría atribuir a un mecanismo más efi ciente de absorción de P en las coníferas (Richardson 2004), entre los que se encuentra la frecuente presencia de ectomicorrizas en coníferas del bosque templado del sur de Chile y Argentina (Diehl et al 2008).…”

Section: Nutrientes En Las Plantas a Lo Largo De La Cronosecuenciaunclassified

“…Sin embargo, se han documentado relaciones N/P similares para las coníferas de Nueva Zelanda (Richardson et al 2004) y del bosque templado de Argentina, creciendo sobre sustratos volcánicos (Diehl et al 2008). Esta relación de N/P discordante con la extrema longevidad foliar de las coníferas se podría atribuir a un mecanismo más efi ciente de absorción de P en las coníferas (Richardson 2004), entre los que se encuentra la frecuente presencia de ectomicorrizas en coníferas del bosque templado del sur de Chile y Argentina (Diehl et al 2008). Bacidiomicetos conocidos en estas asociaciones poseen transportadores con alta afi nidad por el P orgánico que se expresa en las hifas extrarradicales y cuya expresión se estimula en suelos deficientes en P. Más aún, las ectomicorrizas son capaces de liberar P inorgánico a partir del P mineral ocluido a través de la excreción de aniones inorgánicos tales como el oxalato (Plassard & Bell 2010).…”

Section: Nutrientes En Las Plantas a Lo Largo De La Cronosecuenciaunclassified

“…Se esperaría que las especies deciduas tengan una relación N/P foliar mayor que las especies angiospermas siempreverdes y estas a su vez mayores que las coníferas (Diehl 2008). Nuestros resultados apor tarán a entender los procesos de largo plazo de desarrollo forestal sobre sustratos volcánicos, que son dominantes en los Andes del sur de Sudamérica, y establecer los mecanismos que regulan la disponibilidad de nutrientes del suelo y la efi ciencia en el uso de los nutrientes a través de la sucesión y en los diversos grupos funcionales de plantas.…”

Section: Introductionunclassified

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Desacoplamiento del desarrollo del suelo y la sucesión vegetal a lo largo de una cronosecuencia de 60 mil años en el volcán Llaima, Chile

Gallardo¹,

Pérez²,

Núñez‐Ávila³

et al. 2012

Rev. chil. hist. nat.

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“…The evidence shows that forest logging increases N availability through higher rates of mineralization (Reynolds et al, 2000;Thibodeau et al, 2000;Hope et al, 2003;Lindo and Visser, 2003;Inagaki et al, 2008) and decomposition (Prescott, 1997;Brais et al, 2002), leading to increased availability of labile C (Chatterjee et al, 2008) and higher denitrification (Robertson and Tiedje, 1988). However, the effects of altering the inputs of reactive N and land use change in N transformations are less understood in southern temperate forests, where N is strongly limiting for tree growth (Perakis and Hedin, 2001;Vann et al, 2002;Satti et al, 2003;Diehl et al, 2008), and soils are dominated by recalcitrant forms of C, as indicated by the relatively high soil C/N ratios (Pérez et al, 2009). Such analysis is relevant because one of the important microbial transformations in the context of global change is denitrification, as it may counteract eutrophication in aquatic ecosystems and also may be a significant source of N 2 O, an important greenhouse gas.…”

Section: Introductionmentioning

confidence: 99%

Effects of Nitrate and Labile Carbon on Denitrification of Southern Temperate Forest Soils

Pérez

Carmona

Fariña³

et al. 2010

Chilean J. Agric. Res.

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The pressure for anthropogenic land use changes and logging of temperate forests in southern Chile is rapidly increasing, with its potentially high impacts on the capacity of soils to retain important limiting elements. We tested the hypotheses that logging increases the denitrification rates and nitrate and C limitation of denitrifiers activity would be higher in soils of unlogged, old-growth forests than in soils of logged forests. Potential denitrification rates were estimated by the acetylene inhibition assay in intact soil cores in laboratory short-term aerobic incubations using the following treatments: 0.7 mmol NO 3 -N addition, the same nitrate addition plus 23.3 mmol C-glucose, and controls (no additions) with and without 10% v/v acetylene. Forest logging did not significantly change soil nitrate content and C lability (e.g. soil C/N ratio). A nested two-factor ANOVA for repeated measures showed that denitrification was enhanced by nitrate plus labile C additions in both forests, suggesting that in both logged and unlogged forests labile C and nitrate limit denitrifiers activity. Increases were up to one order of magnitude when glucose was added to nitrate treated soils; from 373 ± 113 to 3 353 ± 451 µg N 2 O-N m -2 d -1 in the unlogged, oldgrowth forest and from 1 369 ± 941 to 12 192 ± 7 474 µg N 2 O-N m -2 d -1 in the logged forest. We conclude that, denitrification would be enhanced in logged forests in the longer term due to a greater nitrate and labile C availability of both in disturbed soils.

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Plant limiting nutrients in Andean-Patagonian woody species: Effects of interannual rainfall variation, soil fertility and mycorrhizal infection

Cited by 64 publications

References 44 publications

Plant species richness in a natural Argentinian matorral shrub-land correlates negatively with levels of plant phosphorus

Plant species richness in a natural Argentinian matorral shrub-land correlates negatively with levels of plant phosphorus

Desacoplamiento del desarrollo del suelo y la sucesión vegetal a lo largo de una cronosecuencia de 60 mil años en el volcán Llaima, Chile

Effects of Nitrate and Labile Carbon on Denitrification of Southern Temperate Forest Soils

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