Actividad biológica del suelo en dos bosques de Nothofagus del centro sur de Chile

Rivas, Yessica; Godoy, Roberto; Valenzuela, Eduardo; Leiva, Javier; Oyarzún, Carlos; Alvear, Marysol

doi:10.4067/s0717-66432007000100008

Cited by 6 publications

(4 citation statements)

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“…low during the cold humid winter months (Rivas et al 2007). When temperature rose in spring, net mineralization increased in our study, similarly to N mineralization studies in Aextoxicon punctatum Ruiz et Pav.…”

Section: Discussionsupporting

confidence: 91%

Litterfall, litter decomposition and nitrogen mineralization in old-growth evergreen and secondary deciduous Nothofagus forests in south-central Chile

Staelens

Ameloot

Almonacid

et al. 2011

Rev. chil. hist. nat.

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South Chilean forest ecosystems represent one of the largest areas of old-growth temperate rainforests remaining in the Southern hemisphere and have a high ecological value, but suffer from deforestation, invasion by exotic species, fragmentation, and increasing atmospheric nitrogen (N) deposition. To support sustainable forest management, more knowledge is required on nutrient cycling of these ecosystems. Therefore, a descriptive study of nutrient dynamics was done in four Valdivian rainforests in the lower Andes range of south Chile: old-growth and altered evergreen stands and unmanaged and managed secondary deciduous stands. Time series were measured for (i) mass (four year) and nutrient content (N, K, Ca, and Mg; one year) of litterfall, (ii) decomposition and nutrient dynamics (N, C, K, Ca, Mg, and P; one year) of leaf litter and Saxegothaea conspicua bark litter, and (iii) in situ topsoil net N mineralization (one year). Litterfall in the four stands ranged from 3.5 to 5.8 ton ha-1 yr-1 , was temporarily lower in the managed than in the unmanaged deciduous stand and had a different seasonality in the evergreen stands than in the deciduous stands. Leaf litter decomposed faster (on average 32 % mass loss after one year) than bark litter (8 %) but without significant differences between leaf litter types. Net N in evergreen leaf litter decreased during decomposition but increased in deciduous leaf litter. Net soil N mineralization was fastest in the pristine evergreen stand, intermediate in the deciduous stands and slowest in the altered evergreen forest. Given the absence of replicated stands, the definite impact of forest type or management regime on the internal nutrient cycling cannot be demonstrated. Nevertheless, the results suggest that management can affect nutrient turnover by altering species composition and forest structure, while recent (five years) selective logging in secondary deciduous forest did not affect litter decomposition or N mineralization rates in the present study.

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Section: Discussionsupporting

confidence: 91%

Litterfall, litter decomposition and nitrogen mineralization in old-growth evergreen and secondary deciduous Nothofagus forests in south-central Chile

Staelens

Ameloot

Almonacid

et al. 2011

Rev. chil. hist. nat.

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“…A lack of water may be responsible for the extremely low levels of microbial biomass and phosphatase in arid and semiarid biomes. Areas with harsh climatic conditions have been associated with lower litter input, decomposability, microbial and plant biomass and enzymatic activity 38 . On the other hand, effects of the other end of the water availability spectrum, like those found on flooded areas (swamps, flooded forests) are highly depending on reducing conditions and P speciation due to water saturation 39 (see section 3.2).…”

Section: Discussionmentioning

confidence: 99%

Global patterns of phosphatase activity in natural soils

Margalef

Sardans

Fernández‐Martínez

et al. 2017

Sci Rep

347

192

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Soil phosphatase levels strongly control the biotic pathways of phosphorus (P), an essential element for life, which is often limiting in terrestrial ecosystems. We investigated the influence of climatic and soil traits on phosphatase activity in terrestrial systems using metadata analysis from published studies. This is the first analysis of global measurements of phosphatase in natural soils. Our results suggest that organic P (Porg), rather than available P, is the most important P fraction in predicting phosphatase activity. Structural equation modeling using soil total nitrogen (TN), mean annual precipitation, mean annual temperature, thermal amplitude and total soil carbon as most available predictor variables explained up to 50% of the spatial variance in phosphatase activity. In this analysis, Porg could not be tested and among the rest of available variables, TN was the most important factor explaining the observed spatial gradients in phosphatase activity. On the other hand, phosphatase activity was also found to be associated with climatic conditions and soil type across different biomes worldwide. The close association among different predictors like Porg, TN and precipitation suggest that P recycling is driven by a broad scale pattern of ecosystem productivity capacity.

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“…Sin embargo, la fosfatasa ácida tiene valores similares a los reportados por Rivas et al (2007) en un bosque adulto de N. obliqua en la Depresión Intermedia (Paillaco 40º 07' S) en condiciones estacionales similares. En tanto, la actividad β-glucosidasa es mayor que los valores reportados por Alvear et al (2007ab), estando en los rangos promedios a los encontrados por Trasar-Cepeda et al (2000) en bosques de Querqus robur L. en Galicia, España.…”

Section: Discussionunclassified

“…Para la hidrólisis de la fluoresceína diacetato (FDA) se utilizó la metodología descrita por Alvear et al (2007) y los resultados se expresaron como µg de fluoresceína g -1 h -1 . El carbono en la biomasa microbiana (CBM) y el nitrógeno en la biomasa microbiana (NBM) se midieron según el procedimiento de fumigación-extracción de Vance et al (1987).…”

Section: Métodosunclassified

Actividad biológica del suelo de bosque templado en un transecto altitudinal, Parque Nacional Conguillío (38º S), Chile

Lillo¹,

Ramírez²,

Reyes³

et al. 2011

Bosque (Valdivia)

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Actividad biológica del suelo en dos bosques de Nothofagus del centro sur de Chile

Cited by 6 publications

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Litterfall, litter decomposition and nitrogen mineralization in old-growth evergreen and secondary deciduous Nothofagus forests in south-central Chile

Litterfall, litter decomposition and nitrogen mineralization in old-growth evergreen and secondary deciduous Nothofagus forests in south-central Chile

Global patterns of phosphatase activity in natural soils

Actividad biológica del suelo de bosque templado en un transecto altitudinal, Parque Nacional Conguillío (38º S), Chile

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